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-rw-r--r--platforms/chibios/drivers/analog.c321
-rw-r--r--platforms/chibios/drivers/analog.h41
-rw-r--r--platforms/chibios/drivers/eeprom/eeprom_stm32_L0_L1.c96
-rw-r--r--platforms/chibios/drivers/eeprom/eeprom_stm32_L0_L1.h33
-rw-r--r--platforms/chibios/drivers/i2c_master.c121
-rw-r--r--platforms/chibios/drivers/i2c_master.h113
-rw-r--r--platforms/chibios/drivers/serial.c278
-rw-r--r--platforms/chibios/drivers/serial_usart.c318
-rw-r--r--platforms/chibios/drivers/serial_usart.h116
-rw-r--r--platforms/chibios/drivers/spi_master.c202
-rw-r--r--platforms/chibios/drivers/spi_master.h93
-rw-r--r--platforms/chibios/drivers/uart.c50
-rw-r--r--platforms/chibios/drivers/uart.h77
-rw-r--r--platforms/chibios/drivers/usbpd_stm32g4.c76
-rw-r--r--platforms/chibios/drivers/ws2812.c114
-rw-r--r--platforms/chibios/drivers/ws2812_pwm.c311
-rw-r--r--platforms/chibios/drivers/ws2812_spi.c159
17 files changed, 2519 insertions, 0 deletions
diff --git a/platforms/chibios/drivers/analog.c b/platforms/chibios/drivers/analog.c
new file mode 100644
index 0000000000..8c476fcac2
--- /dev/null
+++ b/platforms/chibios/drivers/analog.c
@@ -0,0 +1,321 @@
+/* Copyright 2019 Drew Mills
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "quantum.h"
+#include "analog.h"
+#include <ch.h>
+#include <hal.h>
+
+#if !HAL_USE_ADC
+# error "You need to set HAL_USE_ADC to TRUE in your halconf.h to use the ADC."
+#endif
+
+#if !STM32_ADC_USE_ADC1 && !STM32_ADC_USE_ADC2 && !STM32_ADC_USE_ADC3 && !STM32_ADC_USE_ADC4
+# error "You need to set one of the 'STM32_ADC_USE_ADCx' settings to TRUE in your mcuconf.h to use the ADC."
+#endif
+
+#if STM32_ADC_DUAL_MODE
+# error "STM32 ADC Dual Mode is not supported at this time."
+#endif
+
+#if STM32_ADCV3_OVERSAMPLING
+# error "STM32 ADCV3 Oversampling is not supported at this time."
+#endif
+
+// Otherwise assume V3
+#if defined(STM32F0XX) || defined(STM32L0XX)
+# define USE_ADCV1
+#elif defined(STM32F1XX) || defined(STM32F2XX) || defined(STM32F4XX)
+# define USE_ADCV2
+#endif
+
+// BODGE to make v2 look like v1,3 and 4
+#ifdef USE_ADCV2
+# if !defined(ADC_SMPR_SMP_1P5) && defined(ADC_SAMPLE_3)
+# define ADC_SMPR_SMP_1P5 ADC_SAMPLE_3
+# define ADC_SMPR_SMP_7P5 ADC_SAMPLE_15
+# define ADC_SMPR_SMP_13P5 ADC_SAMPLE_28
+# define ADC_SMPR_SMP_28P5 ADC_SAMPLE_56
+# define ADC_SMPR_SMP_41P5 ADC_SAMPLE_84
+# define ADC_SMPR_SMP_55P5 ADC_SAMPLE_112
+# define ADC_SMPR_SMP_71P5 ADC_SAMPLE_144
+# define ADC_SMPR_SMP_239P5 ADC_SAMPLE_480
+# endif
+
+# if !defined(ADC_SMPR_SMP_1P5) && defined(ADC_SAMPLE_1P5)
+# define ADC_SMPR_SMP_1P5 ADC_SAMPLE_1P5
+# define ADC_SMPR_SMP_7P5 ADC_SAMPLE_7P5
+# define ADC_SMPR_SMP_13P5 ADC_SAMPLE_13P5
+# define ADC_SMPR_SMP_28P5 ADC_SAMPLE_28P5
+# define ADC_SMPR_SMP_41P5 ADC_SAMPLE_41P5
+# define ADC_SMPR_SMP_55P5 ADC_SAMPLE_55P5
+# define ADC_SMPR_SMP_71P5 ADC_SAMPLE_71P5
+# define ADC_SMPR_SMP_239P5 ADC_SAMPLE_239P5
+# endif
+
+// we still sample at 12bit, but scale down to the requested bit range
+# define ADC_CFGR1_RES_12BIT 12
+# define ADC_CFGR1_RES_10BIT 10
+# define ADC_CFGR1_RES_8BIT 8
+# define ADC_CFGR1_RES_6BIT 6
+#endif
+
+/* User configurable ADC options */
+#ifndef ADC_COUNT
+# if defined(STM32F0XX) || defined(STM32F1XX) || defined(STM32F4XX)
+# define ADC_COUNT 1
+# elif defined(STM32F3XX)
+# define ADC_COUNT 4
+# else
+# error "ADC_COUNT has not been set for this ARM microcontroller."
+# endif
+#endif
+
+#ifndef ADC_NUM_CHANNELS
+# define ADC_NUM_CHANNELS 1
+#elif ADC_NUM_CHANNELS != 1
+# error "The ARM ADC implementation currently only supports reading one channel at a time."
+#endif
+
+#ifndef ADC_BUFFER_DEPTH
+# define ADC_BUFFER_DEPTH 1
+#endif
+
+// For more sampling rate options, look at hal_adc_lld.h in ChibiOS
+#ifndef ADC_SAMPLING_RATE
+# define ADC_SAMPLING_RATE ADC_SMPR_SMP_1P5
+#endif
+
+// Options are 12, 10, 8, and 6 bit.
+#ifndef ADC_RESOLUTION
+# ifdef ADC_CFGR_RES_10BITS // ADCv3, ADCv4
+# define ADC_RESOLUTION ADC_CFGR_RES_10BITS
+# else // ADCv1, ADCv5, or the bodge for ADCv2 above
+# define ADC_RESOLUTION ADC_CFGR1_RES_10BIT
+# endif
+#endif
+
+static ADCConfig adcCfg = {};
+static adcsample_t sampleBuffer[ADC_NUM_CHANNELS * ADC_BUFFER_DEPTH];
+
+// Initialize to max number of ADCs, set to empty object to initialize all to false.
+static bool adcInitialized[ADC_COUNT] = {};
+
+// TODO: add back TR handling???
+static ADCConversionGroup adcConversionGroup = {
+ .circular = FALSE,
+ .num_channels = (uint16_t)(ADC_NUM_CHANNELS),
+#if defined(USE_ADCV1)
+ .cfgr1 = ADC_CFGR1_CONT | ADC_RESOLUTION,
+ .smpr = ADC_SAMPLING_RATE,
+#elif defined(USE_ADCV2)
+# if !defined(STM32F1XX)
+ .cr2 = ADC_CR2_SWSTART, // F103 seem very unhappy with, F401 seems very unhappy without...
+# endif
+ .smpr2 = ADC_SMPR2_SMP_AN0(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN1(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN2(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN3(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN4(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN5(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN6(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN7(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN8(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN9(ADC_SAMPLING_RATE),
+ .smpr1 = ADC_SMPR1_SMP_AN10(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN11(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN12(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN13(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN14(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN15(ADC_SAMPLING_RATE),
+#else
+ .cfgr = ADC_CFGR_CONT | ADC_RESOLUTION,
+ .smpr = {ADC_SMPR1_SMP_AN0(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN1(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN2(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN3(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN4(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN5(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN6(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN7(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN8(ADC_SAMPLING_RATE) | ADC_SMPR1_SMP_AN9(ADC_SAMPLING_RATE), ADC_SMPR2_SMP_AN10(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN11(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN12(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN13(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN14(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN15(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN16(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN17(ADC_SAMPLING_RATE) | ADC_SMPR2_SMP_AN18(ADC_SAMPLING_RATE)},
+#endif
+};
+
+// clang-format off
+__attribute__((weak)) adc_mux pinToMux(pin_t pin) {
+ switch (pin) {
+#if defined(STM32F0XX)
+ case A0: return TO_MUX( ADC_CHSELR_CHSEL0, 0 );
+ case A1: return TO_MUX( ADC_CHSELR_CHSEL1, 0 );
+ case A2: return TO_MUX( ADC_CHSELR_CHSEL2, 0 );
+ case A3: return TO_MUX( ADC_CHSELR_CHSEL3, 0 );
+ case A4: return TO_MUX( ADC_CHSELR_CHSEL4, 0 );
+ case A5: return TO_MUX( ADC_CHSELR_CHSEL5, 0 );
+ case A6: return TO_MUX( ADC_CHSELR_CHSEL6, 0 );
+ case A7: return TO_MUX( ADC_CHSELR_CHSEL7, 0 );
+ case B0: return TO_MUX( ADC_CHSELR_CHSEL8, 0 );
+ case B1: return TO_MUX( ADC_CHSELR_CHSEL9, 0 );
+ case C0: return TO_MUX( ADC_CHSELR_CHSEL10, 0 );
+ case C1: return TO_MUX( ADC_CHSELR_CHSEL11, 0 );
+ case C2: return TO_MUX( ADC_CHSELR_CHSEL12, 0 );
+ case C3: return TO_MUX( ADC_CHSELR_CHSEL13, 0 );
+ case C4: return TO_MUX( ADC_CHSELR_CHSEL14, 0 );
+ case C5: return TO_MUX( ADC_CHSELR_CHSEL15, 0 );
+#elif defined(STM32F3XX)
+ case A0: return TO_MUX( ADC_CHANNEL_IN1, 0 );
+ case A1: return TO_MUX( ADC_CHANNEL_IN2, 0 );
+ case A2: return TO_MUX( ADC_CHANNEL_IN3, 0 );
+ case A3: return TO_MUX( ADC_CHANNEL_IN4, 0 );
+ case A4: return TO_MUX( ADC_CHANNEL_IN1, 1 );
+ case A5: return TO_MUX( ADC_CHANNEL_IN2, 1 );
+ case A6: return TO_MUX( ADC_CHANNEL_IN3, 1 );
+ case A7: return TO_MUX( ADC_CHANNEL_IN4, 1 );
+ case B0: return TO_MUX( ADC_CHANNEL_IN12, 2 );
+ case B1: return TO_MUX( ADC_CHANNEL_IN1, 2 );
+ case B2: return TO_MUX( ADC_CHANNEL_IN12, 1 );
+ case B12: return TO_MUX( ADC_CHANNEL_IN3, 3 );
+ case B13: return TO_MUX( ADC_CHANNEL_IN5, 2 );
+ case B14: return TO_MUX( ADC_CHANNEL_IN4, 3 );
+ case B15: return TO_MUX( ADC_CHANNEL_IN5, 3 );
+ case C0: return TO_MUX( ADC_CHANNEL_IN6, 0 ); // Can also be ADC2
+ case C1: return TO_MUX( ADC_CHANNEL_IN7, 0 ); // Can also be ADC2
+ case C2: return TO_MUX( ADC_CHANNEL_IN8, 0 ); // Can also be ADC2
+ case C3: return TO_MUX( ADC_CHANNEL_IN9, 0 ); // Can also be ADC2
+ case C4: return TO_MUX( ADC_CHANNEL_IN5, 1 );
+ case C5: return TO_MUX( ADC_CHANNEL_IN11, 1 );
+ case D8: return TO_MUX( ADC_CHANNEL_IN12, 3 );
+ case D9: return TO_MUX( ADC_CHANNEL_IN13, 3 );
+ case D10: return TO_MUX( ADC_CHANNEL_IN7, 2 ); // Can also be ADC4
+ case D11: return TO_MUX( ADC_CHANNEL_IN8, 2 ); // Can also be ADC4
+ case D12: return TO_MUX( ADC_CHANNEL_IN9, 2 ); // Can also be ADC4
+ case D13: return TO_MUX( ADC_CHANNEL_IN10, 2 ); // Can also be ADC4
+ case D14: return TO_MUX( ADC_CHANNEL_IN11, 2 ); // Can also be ADC4
+ case E7: return TO_MUX( ADC_CHANNEL_IN13, 2 );
+ case E8: return TO_MUX( ADC_CHANNEL_IN6, 2 ); // Can also be ADC4
+ case E9: return TO_MUX( ADC_CHANNEL_IN2, 2 );
+ case E10: return TO_MUX( ADC_CHANNEL_IN14, 2 );
+ case E11: return TO_MUX( ADC_CHANNEL_IN15, 2 );
+ case E12: return TO_MUX( ADC_CHANNEL_IN16, 2 );
+ case E13: return TO_MUX( ADC_CHANNEL_IN3, 2 );
+ case E14: return TO_MUX( ADC_CHANNEL_IN1, 3 );
+ case E15: return TO_MUX( ADC_CHANNEL_IN2, 3 );
+ case F2: return TO_MUX( ADC_CHANNEL_IN10, 0 ); // Can also be ADC2
+ case F4: return TO_MUX( ADC_CHANNEL_IN5, 0 );
+#elif defined(STM32F4XX)
+ case A0: return TO_MUX( ADC_CHANNEL_IN0, 0 );
+ case A1: return TO_MUX( ADC_CHANNEL_IN1, 0 );
+ case A2: return TO_MUX( ADC_CHANNEL_IN2, 0 );
+ case A3: return TO_MUX( ADC_CHANNEL_IN3, 0 );
+ case A4: return TO_MUX( ADC_CHANNEL_IN4, 0 );
+ case A5: return TO_MUX( ADC_CHANNEL_IN5, 0 );
+ case A6: return TO_MUX( ADC_CHANNEL_IN6, 0 );
+ case A7: return TO_MUX( ADC_CHANNEL_IN7, 0 );
+ case B0: return TO_MUX( ADC_CHANNEL_IN8, 0 );
+ case B1: return TO_MUX( ADC_CHANNEL_IN9, 0 );
+ case C0: return TO_MUX( ADC_CHANNEL_IN10, 0 );
+ case C1: return TO_MUX( ADC_CHANNEL_IN11, 0 );
+ case C2: return TO_MUX( ADC_CHANNEL_IN12, 0 );
+ case C3: return TO_MUX( ADC_CHANNEL_IN13, 0 );
+ case C4: return TO_MUX( ADC_CHANNEL_IN14, 0 );
+ case C5: return TO_MUX( ADC_CHANNEL_IN15, 0 );
+# if STM32_ADC_USE_ADC3
+ case F3: return TO_MUX( ADC_CHANNEL_IN9, 2 );
+ case F4: return TO_MUX( ADC_CHANNEL_IN14, 2 );
+ case F5: return TO_MUX( ADC_CHANNEL_IN15, 2 );
+ case F6: return TO_MUX( ADC_CHANNEL_IN4, 2 );
+ case F7: return TO_MUX( ADC_CHANNEL_IN5, 2 );
+ case F8: return TO_MUX( ADC_CHANNEL_IN6, 2 );
+ case F9: return TO_MUX( ADC_CHANNEL_IN7, 2 );
+ case F10: return TO_MUX( ADC_CHANNEL_IN8, 2 );
+# endif
+#elif defined(STM32F1XX)
+ case A0: return TO_MUX( ADC_CHANNEL_IN0, 0 );
+ case A1: return TO_MUX( ADC_CHANNEL_IN1, 0 );
+ case A2: return TO_MUX( ADC_CHANNEL_IN2, 0 );
+ case A3: return TO_MUX( ADC_CHANNEL_IN3, 0 );
+ case A4: return TO_MUX( ADC_CHANNEL_IN4, 0 );
+ case A5: return TO_MUX( ADC_CHANNEL_IN5, 0 );
+ case A6: return TO_MUX( ADC_CHANNEL_IN6, 0 );
+ case A7: return TO_MUX( ADC_CHANNEL_IN7, 0 );
+ case B0: return TO_MUX( ADC_CHANNEL_IN8, 0 );
+ case B1: return TO_MUX( ADC_CHANNEL_IN9, 0 );
+ case C0: return TO_MUX( ADC_CHANNEL_IN10, 0 );
+ case C1: return TO_MUX( ADC_CHANNEL_IN11, 0 );
+ case C2: return TO_MUX( ADC_CHANNEL_IN12, 0 );
+ case C3: return TO_MUX( ADC_CHANNEL_IN13, 0 );
+ case C4: return TO_MUX( ADC_CHANNEL_IN14, 0 );
+ case C5: return TO_MUX( ADC_CHANNEL_IN15, 0 );
+ // STM32F103x[C-G] in 144-pin packages also have analog inputs on F6...F10, but they are on ADC3, and the
+ // ChibiOS ADC driver for STM32F1xx currently supports only ADC1, therefore these pins are not usable.
+#endif
+ }
+
+ // return an adc that would never be used so intToADCDriver will bail out
+ return TO_MUX(0, 0xFF);
+}
+// clang-format on
+
+static inline ADCDriver* intToADCDriver(uint8_t adcInt) {
+ switch (adcInt) {
+#if STM32_ADC_USE_ADC1
+ case 0:
+ return &ADCD1;
+#endif
+#if STM32_ADC_USE_ADC2
+ case 1:
+ return &ADCD2;
+#endif
+#if STM32_ADC_USE_ADC3
+ case 2:
+ return &ADCD3;
+#endif
+#if STM32_ADC_USE_ADC4
+ case 3:
+ return &ADCD4;
+#endif
+ }
+
+ return NULL;
+}
+
+static inline void manageAdcInitializationDriver(uint8_t adc, ADCDriver* adcDriver) {
+ if (!adcInitialized[adc]) {
+ adcStart(adcDriver, &adcCfg);
+ adcInitialized[adc] = true;
+ }
+}
+
+int16_t analogReadPin(pin_t pin) {
+ palSetLineMode(pin, PAL_MODE_INPUT_ANALOG);
+
+ return adc_read(pinToMux(pin));
+}
+
+int16_t analogReadPinAdc(pin_t pin, uint8_t adc) {
+ palSetLineMode(pin, PAL_MODE_INPUT_ANALOG);
+
+ adc_mux target = pinToMux(pin);
+ target.adc = adc;
+ return adc_read(target);
+}
+
+int16_t adc_read(adc_mux mux) {
+#if defined(USE_ADCV1)
+ // TODO: fix previous assumption of only 1 input...
+ adcConversionGroup.chselr = 1 << mux.input; /*no macro to convert N to ADC_CHSELR_CHSEL1*/
+#elif defined(USE_ADCV2)
+ adcConversionGroup.sqr3 = ADC_SQR3_SQ1_N(mux.input);
+#else
+ adcConversionGroup.sqr[0] = ADC_SQR1_SQ1_N(mux.input);
+#endif
+
+ ADCDriver* targetDriver = intToADCDriver(mux.adc);
+ if (!targetDriver) {
+ return 0;
+ }
+
+ manageAdcInitializationDriver(mux.adc, targetDriver);
+ if (adcConvert(targetDriver, &adcConversionGroup, &sampleBuffer[0], ADC_BUFFER_DEPTH) != MSG_OK) {
+ return 0;
+ }
+
+#ifdef USE_ADCV2
+ // fake 12-bit -> N-bit scale
+ return (*sampleBuffer) >> (12 - ADC_RESOLUTION);
+#else
+ // already handled as part of adcConvert
+ return *sampleBuffer;
+#endif
+}
diff --git a/platforms/chibios/drivers/analog.h b/platforms/chibios/drivers/analog.h
new file mode 100644
index 0000000000..e61c394265
--- /dev/null
+++ b/platforms/chibios/drivers/analog.h
@@ -0,0 +1,41 @@
+/* Copyright 2019 Drew Mills
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include "quantum.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+ uint16_t input;
+ uint8_t adc;
+} adc_mux;
+#define TO_MUX(i, a) \
+ (adc_mux) { i, a }
+
+int16_t analogReadPin(pin_t pin);
+int16_t analogReadPinAdc(pin_t pin, uint8_t adc);
+adc_mux pinToMux(pin_t pin);
+
+int16_t adc_read(adc_mux mux);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/platforms/chibios/drivers/eeprom/eeprom_stm32_L0_L1.c b/platforms/chibios/drivers/eeprom/eeprom_stm32_L0_L1.c
new file mode 100644
index 0000000000..ed26cc7145
--- /dev/null
+++ b/platforms/chibios/drivers/eeprom/eeprom_stm32_L0_L1.c
@@ -0,0 +1,96 @@
+/* Copyright 2020 Nick Brassel (tzarc)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+#include <string.h>
+
+#include <hal.h>
+#include "eeprom_driver.h"
+#include "eeprom_stm32_L0_L1.h"
+
+#define EEPROM_BASE_ADDR 0x08080000
+#define EEPROM_ADDR(offset) (EEPROM_BASE_ADDR + (offset))
+#define EEPROM_PTR(offset) ((__IO uint8_t *)EEPROM_ADDR(offset))
+#define EEPROM_BYTE(location, offset) (*(EEPROM_PTR(((uint32_t)location) + ((uint32_t)offset))))
+
+#define BUFFER_BYTE(buffer, offset) (*(((uint8_t *)buffer) + offset))
+
+#define FLASH_PEKEY1 0x89ABCDEF
+#define FLASH_PEKEY2 0x02030405
+
+static inline void STM32_L0_L1_EEPROM_WaitNotBusy(void) {
+ while (FLASH->SR & FLASH_SR_BSY) {
+ __WFI();
+ }
+}
+
+static inline void STM32_L0_L1_EEPROM_Unlock(void) {
+ STM32_L0_L1_EEPROM_WaitNotBusy();
+ if (FLASH->PECR & FLASH_PECR_PELOCK) {
+ FLASH->PEKEYR = FLASH_PEKEY1;
+ FLASH->PEKEYR = FLASH_PEKEY2;
+ }
+}
+
+static inline void STM32_L0_L1_EEPROM_Lock(void) {
+ STM32_L0_L1_EEPROM_WaitNotBusy();
+ FLASH->PECR |= FLASH_PECR_PELOCK;
+}
+
+void eeprom_driver_init(void) {}
+
+void eeprom_driver_erase(void) {
+ STM32_L0_L1_EEPROM_Unlock();
+
+ for (size_t offset = 0; offset < STM32_ONBOARD_EEPROM_SIZE; offset += sizeof(uint32_t)) {
+ FLASH->PECR |= FLASH_PECR_ERASE | FLASH_PECR_DATA;
+
+ *(__IO uint32_t *)EEPROM_ADDR(offset) = (uint32_t)0;
+
+ STM32_L0_L1_EEPROM_WaitNotBusy();
+ FLASH->PECR &= ~(FLASH_PECR_ERASE | FLASH_PECR_DATA);
+ }
+
+ STM32_L0_L1_EEPROM_Lock();
+}
+
+void eeprom_read_block(void *buf, const void *addr, size_t len) {
+ for (size_t offset = 0; offset < len; ++offset) {
+ // Drop out if we've hit the limit of the EEPROM
+ if ((((uint32_t)addr) + offset) >= STM32_ONBOARD_EEPROM_SIZE) {
+ break;
+ }
+
+ STM32_L0_L1_EEPROM_WaitNotBusy();
+ BUFFER_BYTE(buf, offset) = EEPROM_BYTE(addr, offset);
+ }
+}
+
+void eeprom_write_block(const void *buf, void *addr, size_t len) {
+ STM32_L0_L1_EEPROM_Unlock();
+
+ for (size_t offset = 0; offset < len; ++offset) {
+ // Drop out if we've hit the limit of the EEPROM
+ if ((((uint32_t)addr) + offset) >= STM32_ONBOARD_EEPROM_SIZE) {
+ break;
+ }
+
+ STM32_L0_L1_EEPROM_WaitNotBusy();
+ EEPROM_BYTE(addr, offset) = BUFFER_BYTE(buf, offset);
+ }
+
+ STM32_L0_L1_EEPROM_Lock();
+}
diff --git a/platforms/chibios/drivers/eeprom/eeprom_stm32_L0_L1.h b/platforms/chibios/drivers/eeprom/eeprom_stm32_L0_L1.h
new file mode 100644
index 0000000000..a35defca8b
--- /dev/null
+++ b/platforms/chibios/drivers/eeprom/eeprom_stm32_L0_L1.h
@@ -0,0 +1,33 @@
+/* Copyright 2020 Nick Brassel (tzarc)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+/*
+ The size used by the STM32 L0/L1 EEPROM driver.
+*/
+#ifndef STM32_ONBOARD_EEPROM_SIZE
+# ifdef VIA_ENABLE
+# define STM32_ONBOARD_EEPROM_SIZE 1024
+# else
+# include "eeconfig.h"
+# define STM32_ONBOARD_EEPROM_SIZE (((EECONFIG_SIZE + 3) / 4) * 4) // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO and EEPROM page sizing
+# endif
+#endif
+
+#if STM32_ONBOARD_EEPROM_SIZE > 128
+# pragma message("Please note: resetting EEPROM using an STM32L0/L1 device takes up to 1 second for every 1kB of internal EEPROM used.")
+#endif
diff --git a/platforms/chibios/drivers/i2c_master.c b/platforms/chibios/drivers/i2c_master.c
new file mode 100644
index 0000000000..fc4bb2ab37
--- /dev/null
+++ b/platforms/chibios/drivers/i2c_master.c
@@ -0,0 +1,121 @@
+/* Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* This library is only valid for STM32 processors.
+ * This library follows the convention of the AVR i2c_master library.
+ * As a result addresses are expected to be already shifted (addr << 1).
+ * I2CD1 is the default driver which corresponds to pins B6 and B7. This
+ * can be changed.
+ * Please ensure that HAL_USE_I2C is TRUE in the halconf.h file and that
+ * STM32_I2C_USE_I2C1 is TRUE in the mcuconf.h file. Pins B6 and B7 are used
+ * but using any other I2C pins should be trivial.
+ */
+#include "quantum.h"
+#include "i2c_master.h"
+#include <string.h>
+#include <hal.h>
+
+static uint8_t i2c_address;
+
+static const I2CConfig i2cconfig = {
+#if defined(USE_I2CV1_CONTRIB)
+ I2C1_CLOCK_SPEED,
+#elif defined(USE_I2CV1)
+ I2C1_OPMODE,
+ I2C1_CLOCK_SPEED,
+ I2C1_DUTY_CYCLE,
+#else
+ // This configures the I2C clock to 400khz assuming a 72Mhz clock
+ // For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
+ STM32_TIMINGR_PRESC(I2C1_TIMINGR_PRESC) | STM32_TIMINGR_SCLDEL(I2C1_TIMINGR_SCLDEL) | STM32_TIMINGR_SDADEL(I2C1_TIMINGR_SDADEL) | STM32_TIMINGR_SCLH(I2C1_TIMINGR_SCLH) | STM32_TIMINGR_SCLL(I2C1_TIMINGR_SCLL), 0, 0
+#endif
+};
+
+static i2c_status_t chibios_to_qmk(const msg_t* status) {
+ switch (*status) {
+ case I2C_NO_ERROR:
+ return I2C_STATUS_SUCCESS;
+ case I2C_TIMEOUT:
+ return I2C_STATUS_TIMEOUT;
+ // I2C_BUS_ERROR, I2C_ARBITRATION_LOST, I2C_ACK_FAILURE, I2C_OVERRUN, I2C_PEC_ERROR, I2C_SMB_ALERT
+ default:
+ return I2C_STATUS_ERROR;
+ }
+}
+
+__attribute__((weak)) void i2c_init(void) {
+ static bool is_initialised = false;
+ if (!is_initialised) {
+ is_initialised = true;
+
+ // Try releasing special pins for a short time
+ palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, PAL_MODE_INPUT);
+ palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, PAL_MODE_INPUT);
+
+ chThdSleepMilliseconds(10);
+#if defined(USE_GPIOV1)
+ palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, I2C1_SCL_PAL_MODE);
+ palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, I2C1_SDA_PAL_MODE);
+#else
+ palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, PAL_MODE_ALTERNATE(I2C1_SCL_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
+ palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, PAL_MODE_ALTERNATE(I2C1_SDA_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
+#endif
+ }
+}
+
+i2c_status_t i2c_start(uint8_t address) {
+ i2c_address = address;
+ i2cStart(&I2C_DRIVER, &i2cconfig);
+ return I2C_STATUS_SUCCESS;
+}
+
+i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout) {
+ i2c_address = address;
+ i2cStart(&I2C_DRIVER, &i2cconfig);
+ msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), data, length, 0, 0, TIME_MS2I(timeout));
+ return chibios_to_qmk(&status);
+}
+
+i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout) {
+ i2c_address = address;
+ i2cStart(&I2C_DRIVER, &i2cconfig);
+ msg_t status = i2cMasterReceiveTimeout(&I2C_DRIVER, (i2c_address >> 1), data, length, TIME_MS2I(timeout));
+ return chibios_to_qmk(&status);
+}
+
+i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout) {
+ i2c_address = devaddr;
+ i2cStart(&I2C_DRIVER, &i2cconfig);
+
+ uint8_t complete_packet[length + 1];
+ for (uint8_t i = 0; i < length; i++) {
+ complete_packet[i + 1] = data[i];
+ }
+ complete_packet[0] = regaddr;
+
+ msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), complete_packet, length + 1, 0, 0, TIME_MS2I(timeout));
+ return chibios_to_qmk(&status);
+}
+
+i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout) {
+ i2c_address = devaddr;
+ i2cStart(&I2C_DRIVER, &i2cconfig);
+ msg_t status = i2cMasterTransmitTimeout(&I2C_DRIVER, (i2c_address >> 1), &regaddr, 1, data, length, TIME_MS2I(timeout));
+ return chibios_to_qmk(&status);
+}
+
+void i2c_stop(void) { i2cStop(&I2C_DRIVER); }
diff --git a/platforms/chibios/drivers/i2c_master.h b/platforms/chibios/drivers/i2c_master.h
new file mode 100644
index 0000000000..c68109acbd
--- /dev/null
+++ b/platforms/chibios/drivers/i2c_master.h
@@ -0,0 +1,113 @@
+/* Copyright 2018 Jack Humbert
+ * Copyright 2018 Yiancar
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* This library follows the convention of the AVR i2c_master library.
+ * As a result addresses are expected to be already shifted (addr << 1).
+ * I2CD1 is the default driver which corresponds to pins B6 and B7. This
+ * can be changed.
+ * Please ensure that HAL_USE_I2C is TRUE in the halconf.h file and that
+ * STM32_I2C_USE_I2C1 is TRUE in the mcuconf.h file.
+ */
+#pragma once
+
+#include <ch.h>
+#include <hal.h>
+
+#ifdef I2C1_BANK
+# define I2C1_SCL_BANK I2C1_BANK
+# define I2C1_SDA_BANK I2C1_BANK
+#endif
+
+#ifndef I2C1_SCL_BANK
+# define I2C1_SCL_BANK GPIOB
+#endif
+
+#ifndef I2C1_SDA_BANK
+# define I2C1_SDA_BANK GPIOB
+#endif
+
+#ifndef I2C1_SCL
+# define I2C1_SCL 6
+#endif
+#ifndef I2C1_SDA
+# define I2C1_SDA 7
+#endif
+
+#ifdef USE_I2CV1
+# ifndef I2C1_OPMODE
+# define I2C1_OPMODE OPMODE_I2C
+# endif
+# ifndef I2C1_CLOCK_SPEED
+# define I2C1_CLOCK_SPEED 100000 /* 400000 */
+# endif
+# ifndef I2C1_DUTY_CYCLE
+# define I2C1_DUTY_CYCLE STD_DUTY_CYCLE /* FAST_DUTY_CYCLE_2 */
+# endif
+#else
+// The default timing values below configures the I2C clock to 400khz assuming a 72Mhz clock
+// For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
+# ifndef I2C1_TIMINGR_PRESC
+# define I2C1_TIMINGR_PRESC 0U
+# endif
+# ifndef I2C1_TIMINGR_SCLDEL
+# define I2C1_TIMINGR_SCLDEL 7U
+# endif
+# ifndef I2C1_TIMINGR_SDADEL
+# define I2C1_TIMINGR_SDADEL 0U
+# endif
+# ifndef I2C1_TIMINGR_SCLH
+# define I2C1_TIMINGR_SCLH 38U
+# endif
+# ifndef I2C1_TIMINGR_SCLL
+# define I2C1_TIMINGR_SCLL 129U
+# endif
+#endif
+
+#ifndef I2C_DRIVER
+# define I2C_DRIVER I2CD1
+#endif
+
+#ifdef USE_GPIOV1
+# ifndef I2C1_SCL_PAL_MODE
+# define I2C1_SCL_PAL_MODE PAL_MODE_STM32_ALTERNATE_OPENDRAIN
+# endif
+# ifndef I2C1_SDA_PAL_MODE
+# define I2C1_SDA_PAL_MODE PAL_MODE_STM32_ALTERNATE_OPENDRAIN
+# endif
+#else
+// The default PAL alternate modes are used to signal that the pins are used for I2C
+# ifndef I2C1_SCL_PAL_MODE
+# define I2C1_SCL_PAL_MODE 4
+# endif
+# ifndef I2C1_SDA_PAL_MODE
+# define I2C1_SDA_PAL_MODE 4
+# endif
+#endif
+
+typedef int16_t i2c_status_t;
+
+#define I2C_STATUS_SUCCESS (0)
+#define I2C_STATUS_ERROR (-1)
+#define I2C_STATUS_TIMEOUT (-2)
+
+void i2c_init(void);
+i2c_status_t i2c_start(uint8_t address);
+i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
+void i2c_stop(void);
diff --git a/platforms/chibios/drivers/serial.c b/platforms/chibios/drivers/serial.c
new file mode 100644
index 0000000000..f54fbcee4e
--- /dev/null
+++ b/platforms/chibios/drivers/serial.c
@@ -0,0 +1,278 @@
+/*
+ * WARNING: be careful changing this code, it is very timing dependent
+ */
+
+#include "quantum.h"
+#include "serial.h"
+#include "wait.h"
+
+#include <hal.h>
+
+// TODO: resolve/remove build warnings
+#if defined(RGBLIGHT_ENABLE) && defined(RGBLED_SPLIT) && defined(PROTOCOL_CHIBIOS) && defined(WS2812_DRIVER_BITBANG)
+# warning "RGBLED_SPLIT not supported with bitbang WS2812 driver"
+#endif
+
+// default wait implementation cannot be called within interrupt
+// this method seems to be more accurate than GPT timers
+#if PORT_SUPPORTS_RT == FALSE
+# error "chSysPolledDelayX method not supported on this platform"
+#else
+# undef wait_us
+# define wait_us(x) chSysPolledDelayX(US2RTC(STM32_SYSCLK, x))
+#endif
+
+#ifndef SELECT_SOFT_SERIAL_SPEED
+# define SELECT_SOFT_SERIAL_SPEED 1
+// TODO: correct speeds...
+// 0: about 189kbps (Experimental only)
+// 1: about 137kbps (default)
+// 2: about 75kbps
+// 3: about 39kbps
+// 4: about 26kbps
+// 5: about 20kbps
+#endif
+
+// Serial pulse period in microseconds. At the moment, going lower than 12 causes communication failure
+#if SELECT_SOFT_SERIAL_SPEED == 0
+# define SERIAL_DELAY 12
+#elif SELECT_SOFT_SERIAL_SPEED == 1
+# define SERIAL_DELAY 16
+#elif SELECT_SOFT_SERIAL_SPEED == 2
+# define SERIAL_DELAY 24
+#elif SELECT_SOFT_SERIAL_SPEED == 3
+# define SERIAL_DELAY 32
+#elif SELECT_SOFT_SERIAL_SPEED == 4
+# define SERIAL_DELAY 48
+#elif SELECT_SOFT_SERIAL_SPEED == 5
+# define SERIAL_DELAY 64
+#else
+# error invalid SELECT_SOFT_SERIAL_SPEED value
+#endif
+
+inline static void serial_delay(void) { wait_us(SERIAL_DELAY); }
+inline static void serial_delay_half(void) { wait_us(SERIAL_DELAY / 2); }
+inline static void serial_delay_blip(void) { wait_us(1); }
+inline static void serial_output(void) { setPinOutput(SOFT_SERIAL_PIN); }
+inline static void serial_input(void) { setPinInputHigh(SOFT_SERIAL_PIN); }
+inline static bool serial_read_pin(void) { return !!readPin(SOFT_SERIAL_PIN); }
+inline static void serial_low(void) { writePinLow(SOFT_SERIAL_PIN); }
+inline static void serial_high(void) { writePinHigh(SOFT_SERIAL_PIN); }
+
+void interrupt_handler(void *arg);
+
+// Use thread + palWaitLineTimeout instead of palSetLineCallback
+// - Methods like setPinOutput and palEnableLineEvent/palDisableLineEvent
+// cause the interrupt to lock up, which would limit to only receiving data...
+static THD_WORKING_AREA(waThread1, 128);
+static THD_FUNCTION(Thread1, arg) {
+ (void)arg;
+ chRegSetThreadName("blinker");
+ while (true) {
+ palWaitLineTimeout(SOFT_SERIAL_PIN, TIME_INFINITE);
+ interrupt_handler(NULL);
+ }
+}
+
+void soft_serial_initiator_init(void) {
+ serial_output();
+ serial_high();
+}
+
+void soft_serial_target_init(void) {
+ serial_input();
+
+ palEnablePadEvent(PAL_PORT(SOFT_SERIAL_PIN), PAL_PAD(SOFT_SERIAL_PIN), PAL_EVENT_MODE_FALLING_EDGE);
+ chThdCreateStatic(waThread1, sizeof(waThread1), HIGHPRIO, Thread1, NULL);
+}
+
+// Used by the master to synchronize timing with the slave.
+static void __attribute__((noinline)) sync_recv(void) {
+ serial_input();
+ // This shouldn't hang if the slave disconnects because the
+ // serial line will float to high if the slave does disconnect.
+ while (!serial_read_pin()) {
+ }
+
+ serial_delay();
+}
+
+// Used by the slave to send a synchronization signal to the master.
+static void __attribute__((noinline)) sync_send(void) {
+ serial_output();
+
+ serial_low();
+ serial_delay();
+
+ serial_high();
+}
+
+// Reads a byte from the serial line
+static uint8_t __attribute__((noinline)) serial_read_byte(void) {
+ uint8_t byte = 0;
+ serial_input();
+ for (uint8_t i = 0; i < 8; ++i) {
+ byte = (byte << 1) | serial_read_pin();
+ serial_delay();
+ }
+
+ return byte;
+}
+
+// Sends a byte with MSB ordering
+static void __attribute__((noinline)) serial_write_byte(uint8_t data) {
+ uint8_t b = 8;
+ serial_output();
+ while (b--) {
+ if (data & (1 << b)) {
+ serial_high();
+ } else {
+ serial_low();
+ }
+ serial_delay();
+ }
+}
+
+// interrupt handle to be used by the slave device
+void interrupt_handler(void *arg) {
+ chSysLockFromISR();
+
+ sync_send();
+
+ // read mid pulses
+ serial_delay_blip();
+
+ uint8_t checksum_computed = 0;
+ int sstd_index = 0;
+
+ sstd_index = serial_read_byte();
+ sync_send();
+
+ split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
+ for (int i = 0; i < trans->initiator2target_buffer_size; ++i) {
+ split_trans_initiator2target_buffer(trans)[i] = serial_read_byte();
+ sync_send();
+ checksum_computed += split_trans_initiator2target_buffer(trans)[i];
+ }
+ checksum_computed ^= 7;
+ uint8_t checksum_received = serial_read_byte();
+ sync_send();
+
+ // wait for the sync to finish sending
+ serial_delay();
+
+ // Allow any slave processing to occur
+ if (trans->slave_callback) {
+ trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans));
+ }
+
+ uint8_t checksum = 0;
+ for (int i = 0; i < trans->target2initiator_buffer_size; ++i) {
+ serial_write_byte(split_trans_target2initiator_buffer(trans)[i]);
+ sync_send();
+ serial_delay_half();
+ checksum += split_trans_target2initiator_buffer(trans)[i];
+ }
+ serial_write_byte(checksum ^ 7);
+ sync_send();
+
+ // wait for the sync to finish sending
+ serial_delay();
+
+ *trans->status = (checksum_computed == checksum_received) ? TRANSACTION_ACCEPTED : TRANSACTION_DATA_ERROR;
+
+ // end transaction
+ serial_input();
+
+ // TODO: remove extra delay between transactions
+ serial_delay();
+
+ chSysUnlockFromISR();
+}
+
+/////////
+// start transaction by initiator
+//
+// int soft_serial_transaction(int sstd_index)
+//
+// Returns:
+// TRANSACTION_END
+// TRANSACTION_NO_RESPONSE
+// TRANSACTION_DATA_ERROR
+// this code is very time dependent, so we need to disable interrupts
+int soft_serial_transaction(int sstd_index) {
+ if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR;
+ split_transaction_desc_t *trans = &split_transaction_table[sstd_index];
+ if (!trans->status) return TRANSACTION_TYPE_ERROR; // not registered
+
+ // TODO: remove extra delay between transactions
+ serial_delay();
+
+ // this code is very time dependent, so we need to disable interrupts
+ chSysLock();
+
+ // signal to the slave that we want to start a transaction
+ serial_output();
+ serial_low();
+ serial_delay_blip();
+
+ // wait for the slaves response
+ serial_input();
+ serial_high();
+ serial_delay();
+
+ // check if the slave is present
+ if (serial_read_pin()) {
+ // slave failed to pull the line low, assume not present
+ dprintf("serial::NO_RESPONSE\n");
+ chSysUnlock();
+ return TRANSACTION_NO_RESPONSE;
+ }
+
+ // if the slave is present syncronize with it
+
+ uint8_t checksum = 0;
+ // send data to the slave
+ serial_write_byte(sstd_index); // first chunk is transaction id
+ sync_recv();
+
+ for (int i = 0; i < trans->initiator2target_buffer_size; ++i) {
+ serial_write_byte(split_trans_initiator2target_buffer(trans)[i]);
+ sync_recv();
+ checksum += split_trans_initiator2target_buffer(trans)[i];
+ }
+ serial_write_byte(checksum ^ 7);
+ sync_recv();
+
+ serial_delay();
+ serial_delay(); // read mid pulses
+
+ // receive data from the slave
+ uint8_t checksum_computed = 0;
+ for (int i = 0; i < trans->target2initiator_buffer_size; ++i) {
+ split_trans_target2initiator_buffer(trans)[i] = serial_read_byte();
+ sync_recv();
+ checksum_computed += split_trans_target2initiator_buffer(trans)[i];
+ }
+ checksum_computed ^= 7;
+ uint8_t checksum_received = serial_read_byte();
+
+ sync_recv();
+ serial_delay();
+
+ if ((checksum_computed) != (checksum_received)) {
+ dprintf("serial::FAIL[%u,%u,%u]\n", checksum_computed, checksum_received, sstd_index);
+ serial_output();
+ serial_high();
+
+ chSysUnlock();
+ return TRANSACTION_DATA_ERROR;
+ }
+
+ // always, release the line when not in use
+ serial_high();
+ serial_output();
+
+ chSysUnlock();
+ return TRANSACTION_END;
+}
diff --git a/platforms/chibios/drivers/serial_usart.c b/platforms/chibios/drivers/serial_usart.c
new file mode 100644
index 0000000000..ea4473791c
--- /dev/null
+++ b/platforms/chibios/drivers/serial_usart.c
@@ -0,0 +1,318 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "serial_usart.h"
+
+#if defined(SERIAL_USART_CONFIG)
+static SerialConfig serial_config = SERIAL_USART_CONFIG;
+#else
+static SerialConfig serial_config = {
+ .speed = (SERIAL_USART_SPEED), /* speed - mandatory */
+ .cr1 = (SERIAL_USART_CR1),
+ .cr2 = (SERIAL_USART_CR2),
+# if !defined(SERIAL_USART_FULL_DUPLEX)
+ .cr3 = ((SERIAL_USART_CR3) | USART_CR3_HDSEL) /* activate half-duplex mode */
+# else
+ .cr3 = (SERIAL_USART_CR3)
+# endif
+};
+#endif
+
+static SerialDriver* serial_driver = &SERIAL_USART_DRIVER;
+
+static inline bool react_to_transactions(void);
+static inline bool __attribute__((nonnull)) receive(uint8_t* destination, const size_t size);
+static inline bool __attribute__((nonnull)) send(const uint8_t* source, const size_t size);
+static inline int initiate_transaction(uint8_t sstd_index);
+static inline void usart_clear(void);
+
+/**
+ * @brief Clear the receive input queue.
+ */
+static inline void usart_clear(void) {
+ osalSysLock();
+ bool volatile queue_not_empty = !iqIsEmptyI(&serial_driver->iqueue);
+ osalSysUnlock();
+
+ while (queue_not_empty) {
+ osalSysLock();
+ /* Hard reset the input queue. */
+ iqResetI(&serial_driver->iqueue);
+ osalSysUnlock();
+ /* Allow pending interrupts to preempt.
+ * Do not merge the lock/unlock blocks into one
+ * or the code will not work properly.
+ * The empty read adds a tiny amount of delay. */
+ (void)queue_not_empty;
+ osalSysLock();
+ queue_not_empty = !iqIsEmptyI(&serial_driver->iqueue);
+ osalSysUnlock();
+ }
+}
+
+/**
+ * @brief Blocking send of buffer with timeout.
+ *
+ * @return true Send success.
+ * @return false Send failed.
+ */
+static inline bool send(const uint8_t* source, const size_t size) {
+ bool success = (size_t)sdWriteTimeout(serial_driver, source, size, TIME_MS2I(SERIAL_USART_TIMEOUT)) == size;
+
+#if !defined(SERIAL_USART_FULL_DUPLEX)
+ if (success) {
+ /* Half duplex fills the input queue with the data we wrote - just throw it away.
+ Under the right circumstances (e.g. bad cables paired with high baud rates)
+ less bytes can be present in the input queue, therefore a timeout is needed. */
+ uint8_t dump[size];
+ return receive(dump, size);
+ }
+#endif
+
+ return success;
+}
+
+/**
+ * @brief Blocking receive of size * bytes with timeout.
+ *
+ * @return true Receive success.
+ * @return false Receive failed.
+ */
+static inline bool receive(uint8_t* destination, const size_t size) {
+ bool success = (size_t)sdReadTimeout(serial_driver, destination, size, TIME_MS2I(SERIAL_USART_TIMEOUT)) == size;
+ return success;
+}
+
+#if !defined(SERIAL_USART_FULL_DUPLEX)
+
+/**
+ * @brief Initiate pins for USART peripheral. Half-duplex configuration.
+ */
+__attribute__((weak)) void usart_init(void) {
+# if defined(MCU_STM32)
+# if defined(USE_GPIOV1)
+ palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
+# else
+ palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_TX_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
+# endif
+
+# if defined(USART_REMAP)
+ USART_REMAP;
+# endif
+# else
+# pragma message "usart_init: MCU Familiy not supported by default, please supply your own init code by implementing usart_init() in your keyboard files."
+# endif
+}
+
+#else
+
+/**
+ * @brief Initiate pins for USART peripheral. Full-duplex configuration.
+ */
+__attribute__((weak)) void usart_init(void) {
+# if defined(MCU_STM32)
+# if defined(USE_GPIOV1)
+ palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_STM32_ALTERNATE_PUSHPULL);
+ palSetLineMode(SERIAL_USART_RX_PIN, PAL_MODE_INPUT);
+# else
+ palSetLineMode(SERIAL_USART_TX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_TX_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
+ palSetLineMode(SERIAL_USART_RX_PIN, PAL_MODE_ALTERNATE(SERIAL_USART_RX_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
+# endif
+
+# if defined(USART_REMAP)
+ USART_REMAP;
+# endif
+# else
+# pragma message "usart_init: MCU Familiy not supported by default, please supply your own init code by implementing usart_init() in your keyboard files."
+# endif
+}
+
+#endif
+
+/**
+ * @brief Overridable master specific initializations.
+ */
+__attribute__((weak, nonnull)) void usart_master_init(SerialDriver** driver) {
+ (void)driver;
+ usart_init();
+}
+
+/**
+ * @brief Overridable slave specific initializations.
+ */
+__attribute__((weak, nonnull)) void usart_slave_init(SerialDriver** driver) {
+ (void)driver;
+ usart_init();
+}
+
+/**
+ * @brief This thread runs on the slave and responds to transactions initiated
+ * by the master.
+ */
+static THD_WORKING_AREA(waSlaveThread, 1024);
+static THD_FUNCTION(SlaveThread, arg) {
+ (void)arg;
+ chRegSetThreadName("usart_tx_rx");
+
+ while (true) {
+ if (!react_to_transactions()) {
+ /* Clear the receive queue, to start with a clean slate.
+ * Parts of failed transactions or spurious bytes could still be in it. */
+ usart_clear();
+ }
+ }
+}
+
+/**
+ * @brief Slave specific initializations.
+ */
+void soft_serial_target_init(void) {
+ usart_slave_init(&serial_driver);
+
+ sdStart(serial_driver, &serial_config);
+
+ /* Start transport thread. */
+ chThdCreateStatic(waSlaveThread, sizeof(waSlaveThread), HIGHPRIO, SlaveThread, NULL);
+}
+
+/**
+ * @brief React to transactions started by the master.
+ */
+static inline bool react_to_transactions(void) {
+ /* Wait until there is a transaction for us. */
+ uint8_t sstd_index = (uint8_t)sdGet(serial_driver);
+
+ /* Sanity check that we are actually responding to a valid transaction. */
+ if (sstd_index >= NUM_TOTAL_TRANSACTIONS) {
+ return false;
+ }
+
+ split_transaction_desc_t* trans = &split_transaction_table[sstd_index];
+
+ /* Send back the handshake which is XORed as a simple checksum,
+ to signal that the slave is ready to receive possible transaction buffers */
+ sstd_index ^= HANDSHAKE_MAGIC;
+ if (!send(&sstd_index, sizeof(sstd_index))) {
+ *trans->status = TRANSACTION_DATA_ERROR;
+ return false;
+ }
+
+ /* Receive transaction buffer from the master. If this transaction requires it.*/
+ if (trans->initiator2target_buffer_size) {
+ if (!receive(split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) {
+ *trans->status = TRANSACTION_DATA_ERROR;
+ return false;
+ }
+ }
+
+ /* Allow any slave processing to occur. */
+ if (trans->slave_callback) {
+ trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size, split_trans_target2initiator_buffer(trans));
+ }
+
+ /* Send transaction buffer to the master. If this transaction requires it. */
+ if (trans->target2initiator_buffer_size) {
+ if (!send(split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) {
+ *trans->status = TRANSACTION_DATA_ERROR;
+ return false;
+ }
+ }
+
+ *trans->status = TRANSACTION_ACCEPTED;
+ return true;
+}
+
+/**
+ * @brief Master specific initializations.
+ */
+void soft_serial_initiator_init(void) {
+ usart_master_init(&serial_driver);
+
+#if defined(MCU_STM32) && defined(SERIAL_USART_PIN_SWAP)
+ serial_config.cr2 |= USART_CR2_SWAP; // master has swapped TX/RX pins
+#endif
+
+ sdStart(serial_driver, &serial_config);
+}
+
+/**
+ * @brief Start transaction from the master half to the slave half.
+ *
+ * @param index Transaction Table index of the transaction to start.
+ * @return int TRANSACTION_NO_RESPONSE in case of Timeout.
+ * TRANSACTION_TYPE_ERROR in case of invalid transaction index.
+ * TRANSACTION_END in case of success.
+ */
+int soft_serial_transaction(int index) {
+ /* Clear the receive queue, to start with a clean slate.
+ * Parts of failed transactions or spurious bytes could still be in it. */
+ usart_clear();
+ return initiate_transaction((uint8_t)index);
+}
+
+/**
+ * @brief Initiate transaction to slave half.
+ */
+static inline int initiate_transaction(uint8_t sstd_index) {
+ /* Sanity check that we are actually starting a valid transaction. */
+ if (sstd_index >= NUM_TOTAL_TRANSACTIONS) {
+ dprintln("USART: Illegal transaction Id.");
+ return TRANSACTION_TYPE_ERROR;
+ }
+
+ split_transaction_desc_t* trans = &split_transaction_table[sstd_index];
+
+ /* Transaction is not registered. Abort. */
+ if (!trans->status) {
+ dprintln("USART: Transaction not registered.");
+ return TRANSACTION_TYPE_ERROR;
+ }
+
+ /* Send transaction table index to the slave, which doubles as basic handshake token. */
+ if (!send(&sstd_index, sizeof(sstd_index))) {
+ dprintln("USART: Send Handshake failed.");
+ return TRANSACTION_TYPE_ERROR;
+ }
+
+ uint8_t sstd_index_shake = 0xFF;
+
+ /* Which we always read back first so that we can error out correctly.
+ * - due to the half duplex limitations on return codes, we always have to read *something*.
+ * - without the read, write only transactions *always* succeed, even during the boot process where the slave is not ready.
+ */
+ if (!receive(&sstd_index_shake, sizeof(sstd_index_shake)) || (sstd_index_shake != (sstd_index ^ HANDSHAKE_MAGIC))) {
+ dprintln("USART: Handshake failed.");
+ return TRANSACTION_NO_RESPONSE;
+ }
+
+ /* Send transaction buffer to the slave. If this transaction requires it. */
+ if (trans->initiator2target_buffer_size) {
+ if (!send(split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) {
+ dprintln("USART: Send failed.");
+ return TRANSACTION_NO_RESPONSE;
+ }
+ }
+
+ /* Receive transaction buffer from the slave. If this transaction requires it. */
+ if (trans->target2initiator_buffer_size) {
+ if (!receive(split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) {
+ dprintln("USART: Receive failed.");
+ return TRANSACTION_NO_RESPONSE;
+ }
+ }
+
+ return TRANSACTION_END;
+}
diff --git a/platforms/chibios/drivers/serial_usart.h b/platforms/chibios/drivers/serial_usart.h
new file mode 100644
index 0000000000..7b135b31e0
--- /dev/null
+++ b/platforms/chibios/drivers/serial_usart.h
@@ -0,0 +1,116 @@
+/* Copyright 2021 QMK
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "quantum.h"
+#include "serial.h"
+#include "printf.h"
+
+#include <ch.h>
+#include <hal.h>
+
+#if !defined(SERIAL_USART_DRIVER)
+# define SERIAL_USART_DRIVER SD1
+#endif
+
+#if !defined(USE_GPIOV1)
+/* The default PAL alternate modes are used to signal that the pins are used for USART. */
+# if !defined(SERIAL_USART_TX_PAL_MODE)
+# define SERIAL_USART_TX_PAL_MODE 7
+# endif
+# if !defined(SERIAL_USART_RX_PAL_MODE)
+# define SERIAL_USART_RX_PAL_MODE 7
+# endif
+#endif
+
+#if defined(SOFT_SERIAL_PIN)
+# define SERIAL_USART_TX_PIN SOFT_SERIAL_PIN
+#endif
+
+#if !defined(SERIAL_USART_TX_PIN)
+# define SERIAL_USART_TX_PIN A9
+#endif
+
+#if !defined(SERIAL_USART_RX_PIN)
+# define SERIAL_USART_RX_PIN A10
+#endif
+
+#if !defined(USART_CR1_M0)
+# define USART_CR1_M0 USART_CR1_M // some platforms (f1xx) dont have this so
+#endif
+
+#if !defined(SERIAL_USART_CR1)
+# define SERIAL_USART_CR1 (USART_CR1_PCE | USART_CR1_PS | USART_CR1_M0) // parity enable, odd parity, 9 bit length
+#endif
+
+#if !defined(SERIAL_USART_CR2)
+# define SERIAL_USART_CR2 (USART_CR2_STOP_1) // 2 stop bits
+#endif
+
+#if !defined(SERIAL_USART_CR3)
+# define SERIAL_USART_CR3 0
+#endif
+
+#if defined(USART1_REMAP)
+# define USART_REMAP \
+ do { \
+ (AFIO->MAPR |= AFIO_MAPR_USART1_REMAP); \
+ } while (0)
+#elif defined(USART2_REMAP)
+# define USART_REMAP \
+ do { \
+ (AFIO->MAPR |= AFIO_MAPR_USART2_REMAP); \
+ } while (0)
+#elif defined(USART3_PARTIALREMAP)
+# define USART_REMAP \
+ do { \
+ (AFIO->MAPR |= AFIO_MAPR_USART3_REMAP_PARTIALREMAP); \
+ } while (0)
+#elif defined(USART3_FULLREMAP)
+# define USART_REMAP \
+ do { \
+ (AFIO->MAPR |= AFIO_MAPR_USART3_REMAP_FULLREMAP); \
+ } while (0)
+#endif
+
+#if !defined(SELECT_SOFT_SERIAL_SPEED)
+# define SELECT_SOFT_SERIAL_SPEED 1
+#endif
+
+#if defined(SERIAL_USART_SPEED)
+// Allow advanced users to directly set SERIAL_USART_SPEED
+#elif SELECT_SOFT_SERIAL_SPEED == 0
+# define SERIAL_USART_SPEED 460800
+#elif SELECT_SOFT_SERIAL_SPEED == 1
+# define SERIAL_USART_SPEED 230400
+#elif SELECT_SOFT_SERIAL_SPEED == 2
+# define SERIAL_USART_SPEED 115200
+#elif SELECT_SOFT_SERIAL_SPEED == 3
+# define SERIAL_USART_SPEED 57600
+#elif SELECT_SOFT_SERIAL_SPEED == 4
+# define SERIAL_USART_SPEED 38400
+#elif SELECT_SOFT_SERIAL_SPEED == 5
+# define SERIAL_USART_SPEED 19200
+#else
+# error invalid SELECT_SOFT_SERIAL_SPEED value
+#endif
+
+#if !defined(SERIAL_USART_TIMEOUT)
+# define SERIAL_USART_TIMEOUT 20
+#endif
+
+#define HANDSHAKE_MAGIC 7
diff --git a/platforms/chibios/drivers/spi_master.c b/platforms/chibios/drivers/spi_master.c
new file mode 100644
index 0000000000..28ddcbb2ba
--- /dev/null
+++ b/platforms/chibios/drivers/spi_master.c
@@ -0,0 +1,202 @@
+/* Copyright 2020 Nick Brassel (tzarc)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "spi_master.h"
+
+#include "timer.h"
+
+static pin_t currentSlavePin = NO_PIN;
+
+#if defined(K20x) || defined(KL2x)
+static SPIConfig spiConfig = {NULL, 0, 0, 0};
+#else
+static SPIConfig spiConfig = {false, NULL, 0, 0, 0, 0};
+#endif
+
+__attribute__((weak)) void spi_init(void) {
+ static bool is_initialised = false;
+ if (!is_initialised) {
+ is_initialised = true;
+
+ // Try releasing special pins for a short time
+ setPinInput(SPI_SCK_PIN);
+ setPinInput(SPI_MOSI_PIN);
+ setPinInput(SPI_MISO_PIN);
+
+ chThdSleepMilliseconds(10);
+#if defined(USE_GPIOV1)
+ palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), SPI_SCK_PAL_MODE);
+ palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), SPI_MOSI_PAL_MODE);
+ palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), SPI_MISO_PAL_MODE);
+#else
+ palSetPadMode(PAL_PORT(SPI_SCK_PIN), PAL_PAD(SPI_SCK_PIN), PAL_MODE_ALTERNATE(SPI_SCK_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
+ palSetPadMode(PAL_PORT(SPI_MOSI_PIN), PAL_PAD(SPI_MOSI_PIN), PAL_MODE_ALTERNATE(SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
+ palSetPadMode(PAL_PORT(SPI_MISO_PIN), PAL_PAD(SPI_MISO_PIN), PAL_MODE_ALTERNATE(SPI_MISO_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST);
+#endif
+ }
+}
+
+bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor) {
+ if (currentSlavePin != NO_PIN || slavePin == NO_PIN) {
+ return false;
+ }
+
+ uint16_t roundedDivisor = 2;
+ while (roundedDivisor < divisor) {
+ roundedDivisor <<= 1;
+ }
+
+ if (roundedDivisor < 2 || roundedDivisor > 256) {
+ return false;
+ }
+
+#if defined(K20x) || defined(KL2x)
+ spiConfig.tar0 = SPIx_CTARn_FMSZ(7) | SPIx_CTARn_ASC(1);
+
+ if (lsbFirst) {
+ spiConfig.tar0 |= SPIx_CTARn_LSBFE;
+ }
+
+ switch (mode) {
+ case 0:
+ break;
+ case 1:
+ spiConfig.tar0 |= SPIx_CTARn_CPHA;
+ break;
+ case 2:
+ spiConfig.tar0 |= SPIx_CTARn_CPOL;
+ break;
+ case 3:
+ spiConfig.tar0 |= SPIx_CTARn_CPHA | SPIx_CTARn_CPOL;
+ break;
+ }
+
+ switch (roundedDivisor) {
+ case 2:
+ spiConfig.tar0 |= SPIx_CTARn_BR(0);
+ break;
+ case 4:
+ spiConfig.tar0 |= SPIx_CTARn_BR(1);
+ break;
+ case 8:
+ spiConfig.tar0 |= SPIx_CTARn_BR(3);
+ break;
+ case 16:
+ spiConfig.tar0 |= SPIx_CTARn_BR(4);
+ break;
+ case 32:
+ spiConfig.tar0 |= SPIx_CTARn_BR(5);
+ break;
+ case 64:
+ spiConfig.tar0 |= SPIx_CTARn_BR(6);
+ break;
+ case 128:
+ spiConfig.tar0 |= SPIx_CTARn_BR(7);
+ break;
+ case 256:
+ spiConfig.tar0 |= SPIx_CTARn_BR(8);
+ break;
+ }
+#else
+ spiConfig.cr1 = 0;
+
+ if (lsbFirst) {
+ spiConfig.cr1 |= SPI_CR1_LSBFIRST;
+ }
+
+ switch (mode) {
+ case 0:
+ break;
+ case 1:
+ spiConfig.cr1 |= SPI_CR1_CPHA;
+ break;
+ case 2:
+ spiConfig.cr1 |= SPI_CR1_CPOL;
+ break;
+ case 3:
+ spiConfig.cr1 |= SPI_CR1_CPHA | SPI_CR1_CPOL;
+ break;
+ }
+
+ switch (roundedDivisor) {
+ case 2:
+ break;
+ case 4:
+ spiConfig.cr1 |= SPI_CR1_BR_0;
+ break;
+ case 8:
+ spiConfig.cr1 |= SPI_CR1_BR_1;
+ break;
+ case 16:
+ spiConfig.cr1 |= SPI_CR1_BR_1 | SPI_CR1_BR_0;
+ break;
+ case 32:
+ spiConfig.cr1 |= SPI_CR1_BR_2;
+ break;
+ case 64:
+ spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_0;
+ break;
+ case 128:
+ spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_1;
+ break;
+ case 256:
+ spiConfig.cr1 |= SPI_CR1_BR_2 | SPI_CR1_BR_1 | SPI_CR1_BR_0;
+ break;
+ }
+#endif
+
+ currentSlavePin = slavePin;
+ spiConfig.ssport = PAL_PORT(slavePin);
+ spiConfig.sspad = PAL_PAD(slavePin);
+
+ setPinOutput(slavePin);
+ spiStart(&SPI_DRIVER, &spiConfig);
+ spiSelect(&SPI_DRIVER);
+
+ return true;
+}
+
+spi_status_t spi_write(uint8_t data) {
+ uint8_t rxData;
+ spiExchange(&SPI_DRIVER, 1, &data, &rxData);
+
+ return rxData;
+}
+
+spi_status_t spi_read(void) {
+ uint8_t data = 0;
+ spiReceive(&SPI_DRIVER, 1, &data);
+
+ return data;
+}
+
+spi_status_t spi_transmit(const uint8_t *data, uint16_t length) {
+ spiSend(&SPI_DRIVER, length, data);
+ return SPI_STATUS_SUCCESS;
+}
+
+spi_status_t spi_receive(uint8_t *data, uint16_t length) {
+ spiReceive(&SPI_DRIVER, length, data);
+ return SPI_STATUS_SUCCESS;
+}
+
+void spi_stop(void) {
+ if (currentSlavePin != NO_PIN) {
+ spiUnselect(&SPI_DRIVER);
+ spiStop(&SPI_DRIVER);
+ currentSlavePin = NO_PIN;
+ }
+}
diff --git a/platforms/chibios/drivers/spi_master.h b/platforms/chibios/drivers/spi_master.h
new file mode 100644
index 0000000000..b5a6ef1437
--- /dev/null
+++ b/platforms/chibios/drivers/spi_master.h
@@ -0,0 +1,93 @@
+/* Copyright 2020 Nick Brassel (tzarc)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <ch.h>
+#include <hal.h>
+#include <stdbool.h>
+
+#include "gpio.h"
+#include "chibios_config.h"
+
+#ifndef SPI_DRIVER
+# define SPI_DRIVER SPID2
+#endif
+
+#ifndef SPI_SCK_PIN
+# define SPI_SCK_PIN B13
+#endif
+
+#ifndef SPI_SCK_PAL_MODE
+# if defined(USE_GPIOV1)
+# define SPI_SCK_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+# else
+# define SPI_SCK_PAL_MODE 5
+# endif
+#endif
+
+#ifndef SPI_MOSI_PIN
+# define SPI_MOSI_PIN B15
+#endif
+
+#ifndef SPI_MOSI_PAL_MODE
+# if defined(USE_GPIOV1)
+# define SPI_MOSI_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+# else
+# define SPI_MOSI_PAL_MODE 5
+# endif
+#endif
+
+#ifndef SPI_MISO_PIN
+# define SPI_MISO_PIN B14
+#endif
+
+#ifndef SPI_MISO_PAL_MODE
+# if defined(USE_GPIOV1)
+# define SPI_MISO_PAL_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+# else
+# define SPI_MISO_PAL_MODE 5
+# endif
+#endif
+
+typedef int16_t spi_status_t;
+
+#define SPI_STATUS_SUCCESS (0)
+#define SPI_STATUS_ERROR (-1)
+#define SPI_STATUS_TIMEOUT (-2)
+
+#define SPI_TIMEOUT_IMMEDIATE (0)
+#define SPI_TIMEOUT_INFINITE (0xFFFF)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+void spi_init(void);
+
+bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor);
+
+spi_status_t spi_write(uint8_t data);
+
+spi_status_t spi_read(void);
+
+spi_status_t spi_transmit(const uint8_t *data, uint16_t length);
+
+spi_status_t spi_receive(uint8_t *data, uint16_t length);
+
+void spi_stop(void);
+#ifdef __cplusplus
+}
+#endif
diff --git a/platforms/chibios/drivers/uart.c b/platforms/chibios/drivers/uart.c
new file mode 100644
index 0000000000..030335b342
--- /dev/null
+++ b/platforms/chibios/drivers/uart.c
@@ -0,0 +1,50 @@
+/* Copyright 2021
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "uart.h"
+
+#include "quantum.h"
+
+static SerialConfig serialConfig = {SERIAL_DEFAULT_BITRATE, SD1_CR1, SD1_CR2, SD1_CR3};
+
+void uart_init(uint32_t baud) {
+ static bool is_initialised = false;
+
+ if (!is_initialised) {
+ is_initialised = true;
+
+ serialConfig.speed = baud;
+
+#if defined(USE_GPIOV1)
+ palSetLineMode(SD1_TX_PIN, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
+ palSetLineMode(SD1_RX_PIN, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
+#else
+ palSetLineMode(SD1_TX_PIN, PAL_MODE_ALTERNATE(SD1_TX_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
+ palSetLineMode(SD1_RX_PIN, PAL_MODE_ALTERNATE(SD1_RX_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
+#endif
+ sdStart(&SERIAL_DRIVER, &serialConfig);
+ }
+}
+
+void uart_putchar(uint8_t c) { sdPut(&SERIAL_DRIVER, c); }
+
+uint8_t uart_getchar(void) {
+ msg_t res = sdGet(&SERIAL_DRIVER);
+
+ return (uint8_t)res;
+}
+
+bool uart_available(void) { return !sdGetWouldBlock(&SERIAL_DRIVER); }
diff --git a/platforms/chibios/drivers/uart.h b/platforms/chibios/drivers/uart.h
new file mode 100644
index 0000000000..b4e20e9fd3
--- /dev/null
+++ b/platforms/chibios/drivers/uart.h
@@ -0,0 +1,77 @@
+/* Copyright 2021
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+#include <hal.h>
+
+#ifndef SERIAL_DRIVER
+# define SERIAL_DRIVER SD1
+#endif
+
+#ifndef SD1_TX_PIN
+# define SD1_TX_PIN A9
+#endif
+
+#ifndef SD1_TX_PAL_MODE
+# define SD1_TX_PAL_MODE 7
+#endif
+
+#ifndef SD1_RX_PIN
+# define SD1_RX_PIN A10
+#endif
+
+#ifndef SD1_RX_PAL_MODE
+# define SD1_RX_PAL_MODE 7
+#endif
+
+#ifndef SD1_CTS_PIN
+# define SD1_CTS_PIN A11
+#endif
+
+#ifndef SD1_CTS_PAL_MODE
+# define SD1_CTS_PAL_MODE 7
+#endif
+
+#ifndef SD1_RTS_PIN
+# define SD1_RTS_PIN A12
+#endif
+
+#ifndef SD1_RTS_PAL_MODE
+# define SD1_RTS_PAL_MODE 7
+#endif
+
+#ifndef SD1_CR1
+# define SD1_CR1 0
+#endif
+
+#ifndef SD1_CR2
+# define SD1_CR2 0
+#endif
+
+#ifndef SD1_CR3
+# define SD1_CR3 0
+#endif
+
+void uart_init(uint32_t baud);
+
+void uart_putchar(uint8_t c);
+
+uint8_t uart_getchar(void);
+
+bool uart_available(void);
diff --git a/platforms/chibios/drivers/usbpd_stm32g4.c b/platforms/chibios/drivers/usbpd_stm32g4.c
new file mode 100644
index 0000000000..f16ca8aeae
--- /dev/null
+++ b/platforms/chibios/drivers/usbpd_stm32g4.c
@@ -0,0 +1,76 @@
+/* Copyright 2021 Nick Brassel (@tzarc)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <quantum.h>
+
+#ifndef USBPD_UCPD1_CFG1
+# define USBPD_UCPD1_CFG1 (UCPD_CFG1_PSC_UCPDCLK_0 | UCPD_CFG1_TRANSWIN_3 | UCPD_CFG1_IFRGAP_4 | UCPD_CFG1_HBITCLKDIV_4)
+#endif // USBPD_UCPD1_CFG1
+
+// Initialises the USBPD subsystem
+__attribute__((weak)) void usbpd_init(void) {
+ // Disable dead-battery signals
+ PWR->CR3 |= PWR_CR3_UCPD_DBDIS;
+ // Enable the clock for the UCPD1 peripheral
+ RCC->APB1ENR2 |= RCC_APB1ENR2_UCPD1EN;
+
+ // Copy the existing value
+ uint32_t CFG1 = UCPD1->CFG1;
+ // Force-disable UCPD1 before configuring
+ CFG1 &= ~UCPD_CFG1_UCPDEN;
+ // Configure UCPD1
+ CFG1 = USBPD_UCPD1_CFG1;
+ // Apply the changes
+ UCPD1->CFG1 = CFG1;
+ // Enable UCPD1
+ UCPD1->CFG1 |= UCPD_CFG1_UCPDEN;
+
+ // Copy the existing value
+ uint32_t CR = UCPD1->CR;
+ // Clear out ANASUBMODE (irrelevant as a sink device)
+ CR &= ~UCPD_CR_ANASUBMODE_Msk;
+ // Advertise our capabilities as a sink, with both CC lines enabled
+ CR |= UCPD_CR_ANAMODE | UCPD_CR_CCENABLE_Msk;
+ // Apply the changes
+ UCPD1->CR = CR;
+}
+
+// Gets the current state of the USBPD allowance
+__attribute__((weak)) usbpd_allowance_t usbpd_get_allowance(void) {
+ uint32_t CR = UCPD1->CR;
+
+ int ucpd_enabled = (UCPD1->CFG1 & UCPD_CFG1_UCPDEN_Msk) >> UCPD_CFG1_UCPDEN_Pos;
+ int anamode = (CR & UCPD_CR_ANAMODE_Msk) >> UCPD_CR_ANAMODE_Pos;
+ int cc_enabled = (CR & UCPD_CR_CCENABLE_Msk) >> UCPD_CR_CCENABLE_Pos;
+
+ if (ucpd_enabled && anamode && cc_enabled) {
+ uint32_t SR = UCPD1->SR;
+ int vstate_cc1 = (SR & UCPD_SR_TYPEC_VSTATE_CC1_Msk) >> UCPD_SR_TYPEC_VSTATE_CC1_Pos;
+ int vstate_cc2 = (SR & UCPD_SR_TYPEC_VSTATE_CC2_Msk) >> UCPD_SR_TYPEC_VSTATE_CC2_Pos;
+ int vstate_max = vstate_cc1 > vstate_cc2 ? vstate_cc1 : vstate_cc2;
+ switch (vstate_max) {
+ case 0:
+ case 1:
+ return USBPD_500MA; // Note that this is 500mA (i.e. max USB 2.0), not 900mA, as we're not using USB 3.1 as a sink device.
+ case 2:
+ return USBPD_1500MA;
+ case 3:
+ return USBPD_3000MA;
+ }
+ }
+
+ return USBPD_500MA;
+} \ No newline at end of file
diff --git a/platforms/chibios/drivers/ws2812.c b/platforms/chibios/drivers/ws2812.c
new file mode 100644
index 0000000000..0d12e2fb79
--- /dev/null
+++ b/platforms/chibios/drivers/ws2812.c
@@ -0,0 +1,114 @@
+#include "quantum.h"
+#include "ws2812.h"
+#include <ch.h>
+#include <hal.h>
+
+/* Adapted from https://github.com/bigjosh/SimpleNeoPixelDemo/ */
+
+#ifndef NOP_FUDGE
+# if defined(STM32F0XX) || defined(STM32F1XX) || defined(STM32F3XX) || defined(STM32F4XX) || defined(STM32L0XX)
+# define NOP_FUDGE 0.4
+# else
+# error("NOP_FUDGE configuration required")
+# define NOP_FUDGE 1 // this just pleases the compile so the above error is easier to spot
+# endif
+#endif
+
+// Push Pull or Open Drain Configuration
+// Default Push Pull
+#ifndef WS2812_EXTERNAL_PULLUP
+# define WS2812_OUTPUT_MODE PAL_MODE_OUTPUT_PUSHPULL
+#else
+# define WS2812_OUTPUT_MODE PAL_MODE_OUTPUT_OPENDRAIN
+#endif
+
+#define NUMBER_NOPS 6
+#define CYCLES_PER_SEC (STM32_SYSCLK / NUMBER_NOPS * NOP_FUDGE)
+#define NS_PER_SEC (1000000000L) // Note that this has to be SIGNED since we want to be able to check for negative values of derivatives
+#define NS_PER_CYCLE (NS_PER_SEC / CYCLES_PER_SEC)
+#define NS_TO_CYCLES(n) ((n) / NS_PER_CYCLE)
+
+#define wait_ns(x) \
+ do { \
+ for (int i = 0; i < NS_TO_CYCLES(x); i++) { \
+ __asm__ volatile("nop\n\t" \
+ "nop\n\t" \
+ "nop\n\t" \
+ "nop\n\t" \
+ "nop\n\t" \
+ "nop\n\t"); \
+ } \
+ } while (0)
+
+// These are the timing constraints taken mostly from the WS2812 datasheets
+// These are chosen to be conservative and avoid problems rather than for maximum throughput
+
+#define T1H 900 // Width of a 1 bit in ns
+#define T1L (1250 - T1H) // Width of a 1 bit in ns
+
+#define T0H 350 // Width of a 0 bit in ns
+#define T0L (1250 - T0H) // Width of a 0 bit in ns
+
+// The reset gap can be 6000 ns, but depending on the LED strip it may have to be increased
+// to values like 600000 ns. If it is too small, the pixels will show nothing most of the time.
+#define RES (1000 * WS2812_TRST_US) // Width of the low gap between bits to cause a frame to latch
+
+void sendByte(uint8_t byte) {
+ // WS2812 protocol wants most significant bits first
+ for (unsigned char bit = 0; bit < 8; bit++) {
+ bool is_one = byte & (1 << (7 - bit));
+ // using something like wait_ns(is_one ? T1L : T0L) here throws off timings
+ if (is_one) {
+ // 1
+ writePinHigh(RGB_DI_PIN);
+ wait_ns(T1H);
+ writePinLow(RGB_DI_PIN);
+ wait_ns(T1L);
+ } else {
+ // 0
+ writePinHigh(RGB_DI_PIN);
+ wait_ns(T0H);
+ writePinLow(RGB_DI_PIN);
+ wait_ns(T0L);
+ }
+ }
+}
+
+void ws2812_init(void) { palSetLineMode(RGB_DI_PIN, WS2812_OUTPUT_MODE); }
+
+// Setleds for standard RGB
+void ws2812_setleds(LED_TYPE *ledarray, uint16_t leds) {
+ static bool s_init = false;
+ if (!s_init) {
+ ws2812_init();
+ s_init = true;
+ }
+
+ // this code is very time dependent, so we need to disable interrupts
+ chSysLock();
+
+ for (uint8_t i = 0; i < leds; i++) {
+ // WS2812 protocol dictates grb order
+#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
+ sendByte(ledarray[i].g);
+ sendByte(ledarray[i].r);
+ sendByte(ledarray[i].b);
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
+ sendByte(ledarray[i].r);
+ sendByte(ledarray[i].g);
+ sendByte(ledarray[i].b);
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
+ sendByte(ledarray[i].b);
+ sendByte(ledarray[i].g);
+ sendByte(ledarray[i].r);
+#endif
+
+#ifdef RGBW
+ sendByte(ledarray[i].w);
+#endif
+ }
+
+ wait_ns(RES);
+
+ chSysUnlock();
+}
diff --git a/platforms/chibios/drivers/ws2812_pwm.c b/platforms/chibios/drivers/ws2812_pwm.c
new file mode 100644
index 0000000000..e6af55b6b3
--- /dev/null
+++ b/platforms/chibios/drivers/ws2812_pwm.c
@@ -0,0 +1,311 @@
+#include "ws2812.h"
+#include "quantum.h"
+#include <hal.h>
+
+/* Adapted from https://github.com/joewa/WS2812-LED-Driver_ChibiOS/ */
+
+#ifdef RGBW
+# error "RGBW not supported"
+#endif
+
+#ifndef WS2812_PWM_DRIVER
+# define WS2812_PWM_DRIVER PWMD2 // TIMx
+#endif
+#ifndef WS2812_PWM_CHANNEL
+# define WS2812_PWM_CHANNEL 2 // Channel
+#endif
+#ifndef WS2812_PWM_PAL_MODE
+# define WS2812_PWM_PAL_MODE 2 // DI Pin's alternate function value
+#endif
+#ifndef WS2812_DMA_STREAM
+# define WS2812_DMA_STREAM STM32_DMA1_STREAM2 // DMA Stream for TIMx_UP
+#endif
+#ifndef WS2812_DMA_CHANNEL
+# define WS2812_DMA_CHANNEL 2 // DMA Channel for TIMx_UP
+#endif
+#if (STM32_DMA_SUPPORTS_DMAMUX == TRUE) && !defined(WS2812_DMAMUX_ID)
+# error "please consult your MCU's datasheet and specify in your config.h: #define WS2812_DMAMUX_ID STM32_DMAMUX1_TIM?_UP"
+#endif
+
+#ifndef WS2812_PWM_COMPLEMENTARY_OUTPUT
+# define WS2812_PWM_OUTPUT_MODE PWM_OUTPUT_ACTIVE_HIGH
+#else
+# if !STM32_PWM_USE_ADVANCED
+# error "WS2812_PWM_COMPLEMENTARY_OUTPUT requires STM32_PWM_USE_ADVANCED == TRUE"
+# endif
+# define WS2812_PWM_OUTPUT_MODE PWM_COMPLEMENTARY_OUTPUT_ACTIVE_HIGH
+#endif
+
+// Push Pull or Open Drain Configuration
+// Default Push Pull
+#ifndef WS2812_EXTERNAL_PULLUP
+# if defined(USE_GPIOV1)
+# define WS2812_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+# else
+# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING
+# endif
+#else
+# if defined(USE_GPIOV1)
+# define WS2812_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_OPENDRAIN
+# else
+# define WS2812_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_PWM_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN | PAL_STM32_OSPEED_HIGHEST | PAL_STM32_PUPDR_FLOATING
+# endif
+#endif
+
+#ifndef WS2812_PWM_TARGET_PERIOD
+//# define WS2812_PWM_TARGET_PERIOD 800000 // Original code is 800k...?
+# define WS2812_PWM_TARGET_PERIOD 80000 // TODO: work out why 10x less on f303/f4x1
+#endif
+
+/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
+
+#define WS2812_PWM_FREQUENCY (STM32_SYSCLK / 2) /**< Clock frequency of PWM, must be valid with respect to system clock! */
+#define WS2812_PWM_PERIOD (WS2812_PWM_FREQUENCY / WS2812_PWM_TARGET_PERIOD) /**< Clock period in ticks. 1 / 800kHz = 1.25 uS (as per datasheet) */
+
+/**
+ * @brief Number of bit-periods to hold the data line low at the end of a frame
+ *
+ * The reset period for each frame is defined in WS2812_TRST_US.
+ * Calculate the number of zeroes to add at the end assuming 1.25 uS/bit:
+ */
+#define WS2812_RESET_BIT_N (1000 * WS2812_TRST_US / 1250)
+#define WS2812_COLOR_BIT_N (RGBLED_NUM * 24) /**< Number of data bits */
+#define WS2812_BIT_N (WS2812_COLOR_BIT_N + WS2812_RESET_BIT_N) /**< Total number of bits in a frame */
+
+/**
+ * @brief High period for a zero, in ticks
+ *
+ * Per the datasheet:
+ * WS2812:
+ * - T0H: 200 nS to 500 nS, inclusive
+ * - T0L: 650 nS to 950 nS, inclusive
+ * WS2812B:
+ * - T0H: 200 nS to 500 nS, inclusive
+ * - T0L: 750 nS to 1050 nS, inclusive
+ *
+ * The duty cycle is calculated for a high period of 350 nS.
+ */
+#define WS2812_DUTYCYCLE_0 (WS2812_PWM_FREQUENCY / (1000000000 / 350))
+
+/**
+ * @brief High period for a one, in ticks
+ *
+ * Per the datasheet:
+ * WS2812:
+ * - T1H: 550 nS to 850 nS, inclusive
+ * - T1L: 450 nS to 750 nS, inclusive
+ * WS2812B:
+ * - T1H: 750 nS to 1050 nS, inclusive
+ * - T1L: 200 nS to 500 nS, inclusive
+ *
+ * The duty cycle is calculated for a high period of 800 nS.
+ * This is in the middle of the specifications of the WS2812 and WS2812B.
+ */
+#define WS2812_DUTYCYCLE_1 (WS2812_PWM_FREQUENCY / (1000000000 / 800))
+
+/* --- PRIVATE MACROS ------------------------------------------------------- */
+
+/**
+ * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given bit
+ *
+ * @param[in] led: The led index [0, @ref RGBLED_NUM)
+ * @param[in] byte: The byte number [0, 2]
+ * @param[in] bit: The bit number [0, 7]
+ *
+ * @return The bit index
+ */
+#define WS2812_BIT(led, byte, bit) (24 * (led) + 8 * (byte) + (7 - (bit)))
+
+#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
+/**
+ * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given red bit
+ *
+ * @note The red byte is the middle byte in the color packet
+ *
+ * @param[in] led: The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit: The bit number [0, 7]
+ *
+ * @return The bit index
+ */
+# define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 1, (bit))
+
+/**
+ * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit
+ *
+ * @note The red byte is the first byte in the color packet
+ *
+ * @param[in] led: The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit: The bit number [0, 7]
+ *
+ * @return The bit index
+ */
+# define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 0, (bit))
+
+/**
+ * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit
+ *
+ * @note The red byte is the last byte in the color packet
+ *
+ * @param[in] led: The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit: The bit index [0, 7]
+ *
+ * @return The bit index
+ */
+# define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 2, (bit))
+
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
+/**
+ * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given red bit
+ *
+ * @note The red byte is the middle byte in the color packet
+ *
+ * @param[in] led: The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit: The bit number [0, 7]
+ *
+ * @return The bit index
+ */
+# define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 0, (bit))
+
+/**
+ * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit
+ *
+ * @note The red byte is the first byte in the color packet
+ *
+ * @param[in] led: The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit: The bit number [0, 7]
+ *
+ * @return The bit index
+ */
+# define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 1, (bit))
+
+/**
+ * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit
+ *
+ * @note The red byte is the last byte in the color packet
+ *
+ * @param[in] led: The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit: The bit index [0, 7]
+ *
+ * @return The bit index
+ */
+# define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 2, (bit))
+
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
+/**
+ * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given red bit
+ *
+ * @note The red byte is the middle byte in the color packet
+ *
+ * @param[in] led: The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit: The bit number [0, 7]
+ *
+ * @return The bit index
+ */
+# define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 2, (bit))
+
+/**
+ * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit
+ *
+ * @note The red byte is the first byte in the color packet
+ *
+ * @param[in] led: The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit: The bit number [0, 7]
+ *
+ * @return The bit index
+ */
+# define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 1, (bit))
+
+/**
+ * @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit
+ *
+ * @note The red byte is the last byte in the color packet
+ *
+ * @param[in] led: The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit: The bit index [0, 7]
+ *
+ * @return The bit index
+ */
+# define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 0, (bit))
+#endif
+
+/* --- PRIVATE VARIABLES ---------------------------------------------------- */
+
+static uint32_t ws2812_frame_buffer[WS2812_BIT_N + 1]; /**< Buffer for a frame */
+
+/* --- PUBLIC FUNCTIONS ----------------------------------------------------- */
+/*
+ * Gedanke: Double-buffer type transactions: double buffer transfers using two memory pointers for
+the memory (while the DMA is reading/writing from/to a buffer, the application can
+write/read to/from the other buffer).
+ */
+
+void ws2812_init(void) {
+ // Initialize led frame buffer
+ uint32_t i;
+ for (i = 0; i < WS2812_COLOR_BIT_N; i++) ws2812_frame_buffer[i] = WS2812_DUTYCYCLE_0; // All color bits are zero duty cycle
+ for (i = 0; i < WS2812_RESET_BIT_N; i++) ws2812_frame_buffer[i + WS2812_COLOR_BIT_N] = 0; // All reset bits are zero
+
+ palSetLineMode(RGB_DI_PIN, WS2812_OUTPUT_MODE);
+
+ // PWM Configuration
+ //#pragma GCC diagnostic ignored "-Woverride-init" // Turn off override-init warning for this struct. We use the overriding ability to set a "default" channel config
+ static const PWMConfig ws2812_pwm_config = {
+ .frequency = WS2812_PWM_FREQUENCY,
+ .period = WS2812_PWM_PERIOD, // Mit dieser Periode wird UDE-Event erzeugt und ein neuer Wert (Länge WS2812_BIT_N) vom DMA ins CCR geschrieben
+ .callback = NULL,
+ .channels =
+ {
+ [0 ... 3] = {.mode = PWM_OUTPUT_DISABLED, .callback = NULL}, // Channels default to disabled
+ [WS2812_PWM_CHANNEL - 1] = {.mode = WS2812_PWM_OUTPUT_MODE, .callback = NULL}, // Turn on the channel we care about
+ },
+ .cr2 = 0,
+ .dier = TIM_DIER_UDE, // DMA on update event for next period
+ };
+ //#pragma GCC diagnostic pop // Restore command-line warning options
+
+ // Configure DMA
+ // dmaInit(); // Joe added this
+ dmaStreamAlloc(WS2812_DMA_STREAM - STM32_DMA_STREAM(0), 10, NULL, NULL);
+ dmaStreamSetPeripheral(WS2812_DMA_STREAM, &(WS2812_PWM_DRIVER.tim->CCR[WS2812_PWM_CHANNEL - 1])); // Ziel ist der An-Zeit im Cap-Comp-Register
+ dmaStreamSetMemory0(WS2812_DMA_STREAM, ws2812_frame_buffer);
+ dmaStreamSetTransactionSize(WS2812_DMA_STREAM, WS2812_BIT_N);
+ dmaStreamSetMode(WS2812_DMA_STREAM, STM32_DMA_CR_CHSEL(WS2812_DMA_CHANNEL) | STM32_DMA_CR_DIR_M2P | STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_WORD | STM32_DMA_CR_MINC | STM32_DMA_CR_CIRC | STM32_DMA_CR_PL(3));
+ // M2P: Memory 2 Periph; PL: Priority Level
+
+#if (STM32_DMA_SUPPORTS_DMAMUX == TRUE)
+ // If the MCU has a DMAMUX we need to assign the correct resource
+ dmaSetRequestSource(WS2812_DMA_STREAM, WS2812_DMAMUX_ID);
+#endif
+
+ // Start DMA
+ dmaStreamEnable(WS2812_DMA_STREAM);
+
+ // Configure PWM
+ // NOTE: It's required that preload be enabled on the timer channel CCR register. This is currently enabled in the
+ // ChibiOS driver code, so we don't have to do anything special to the timer. If we did, we'd have to start the timer,
+ // disable counting, enable the channel, and then make whatever configuration changes we need.
+ pwmStart(&WS2812_PWM_DRIVER, &ws2812_pwm_config);
+ pwmEnableChannel(&WS2812_PWM_DRIVER, WS2812_PWM_CHANNEL - 1, 0); // Initial period is 0; output will be low until first duty cycle is DMA'd in
+}
+
+void ws2812_write_led(uint16_t led_number, uint8_t r, uint8_t g, uint8_t b) {
+ // Write color to frame buffer
+ for (uint8_t bit = 0; bit < 8; bit++) {
+ ws2812_frame_buffer[WS2812_RED_BIT(led_number, bit)] = ((r >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0;
+ ws2812_frame_buffer[WS2812_GREEN_BIT(led_number, bit)] = ((g >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0;
+ ws2812_frame_buffer[WS2812_BLUE_BIT(led_number, bit)] = ((b >> bit) & 0x01) ? WS2812_DUTYCYCLE_1 : WS2812_DUTYCYCLE_0;
+ }
+}
+
+// Setleds for standard RGB
+void ws2812_setleds(LED_TYPE* ledarray, uint16_t leds) {
+ static bool s_init = false;
+ if (!s_init) {
+ ws2812_init();
+ s_init = true;
+ }
+
+ for (uint16_t i = 0; i < leds; i++) {
+ ws2812_write_led(i, ledarray[i].r, ledarray[i].g, ledarray[i].b);
+ }
+}
diff --git a/platforms/chibios/drivers/ws2812_spi.c b/platforms/chibios/drivers/ws2812_spi.c
new file mode 100644
index 0000000000..377a929b94
--- /dev/null
+++ b/platforms/chibios/drivers/ws2812_spi.c
@@ -0,0 +1,159 @@
+#include "quantum.h"
+#include "ws2812.h"
+
+/* Adapted from https://github.com/gamazeps/ws2812b-chibios-SPIDMA/ */
+
+#ifdef RGBW
+# error "RGBW not supported"
+#endif
+
+// Define the spi your LEDs are plugged to here
+#ifndef WS2812_SPI
+# define WS2812_SPI SPID1
+#endif
+
+#ifndef WS2812_SPI_MOSI_PAL_MODE
+# define WS2812_SPI_MOSI_PAL_MODE 5
+#endif
+
+#ifndef WS2812_SPI_SCK_PAL_MODE
+# define WS2812_SPI_SCK_PAL_MODE 5
+#endif
+
+// Push Pull or Open Drain Configuration
+// Default Push Pull
+#ifndef WS2812_EXTERNAL_PULLUP
+# if defined(USE_GPIOV1)
+# define WS2812_MOSI_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+# else
+# define WS2812_MOSI_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL
+# endif
+#else
+# if defined(USE_GPIOV1)
+# define WS2812_MOSI_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_OPENDRAIN
+# else
+# define WS2812_MOSI_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_SPI_MOSI_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN
+# endif
+#endif
+
+// Define SPI config speed
+// baudrate should target 3.2MHz
+// F072 fpclk = 48MHz
+// 48/16 = 3Mhz
+#if WS2812_SPI_DIVISOR == 2
+# define WS2812_SPI_DIVISOR (0)
+#elif WS2812_SPI_DIVISOR == 4
+# define WS2812_SPI_DIVISOR (SPI_CR1_BR_0)
+#elif WS2812_SPI_DIVISOR == 8
+# define WS2812_SPI_DIVISOR (SPI_CR1_BR_1)
+#elif WS2812_SPI_DIVISOR == 16 // same as default
+# define WS2812_SPI_DIVISOR (SPI_CR1_BR_1 | SPI_CR1_BR_0)
+#elif WS2812_SPI_DIVISOR == 32
+# define WS2812_SPI_DIVISOR (SPI_CR1_BR_2)
+#elif WS2812_SPI_DIVISOR == 64
+# define WS2812_SPI_DIVISOR (SPI_CR1_BR_2 | SPI_CR1_BR_0)
+#elif WS2812_SPI_DIVISOR == 128
+# define WS2812_SPI_DIVISOR (SPI_CR1_BR_2 | SPI_CR1_BR_1)
+#elif WS2812_SPI_DIVISOR == 256
+# define WS2812_SPI_DIVISOR (SPI_CR1_BR_2 | SPI_CR1_BR_1 | SPI_CR1_BR_0)
+#else
+# define WS2812_SPI_DIVISOR (SPI_CR1_BR_1 | SPI_CR1_BR_0) // default
+#endif
+
+// Use SPI circular buffer
+#ifdef WS2812_SPI_USE_CIRCULAR_BUFFER
+# define WS2812_SPI_BUFFER_MODE 1 // circular buffer
+#else
+# define WS2812_SPI_BUFFER_MODE 0 // normal buffer
+#endif
+
+#if defined(USE_GPIOV1)
+# define WS2812_SCK_OUTPUT_MODE PAL_MODE_STM32_ALTERNATE_PUSHPULL
+#else
+# define WS2812_SCK_OUTPUT_MODE PAL_MODE_ALTERNATE(WS2812_SPI_SCK_PAL_MODE) | PAL_STM32_OTYPE_PUSHPULL
+#endif
+
+#define BYTES_FOR_LED_BYTE 4
+#define NB_COLORS 3
+#define BYTES_FOR_LED (BYTES_FOR_LED_BYTE * NB_COLORS)
+#define DATA_SIZE (BYTES_FOR_LED * RGBLED_NUM)
+#define RESET_SIZE (1000 * WS2812_TRST_US / (2 * 1250))
+#define PREAMBLE_SIZE 4
+
+static uint8_t txbuf[PREAMBLE_SIZE + DATA_SIZE + RESET_SIZE] = {0};
+
+/*
+ * As the trick here is to use the SPI to send a huge pattern of 0 and 1 to
+ * the ws2812b protocol, we use this helper function to translate bytes into
+ * 0s and 1s for the LED (with the appropriate timing).
+ */
+static uint8_t get_protocol_eq(uint8_t data, int pos) {
+ uint8_t eq = 0;
+ if (data & (1 << (2 * (3 - pos))))
+ eq = 0b1110;
+ else
+ eq = 0b1000;
+ if (data & (2 << (2 * (3 - pos))))
+ eq += 0b11100000;
+ else
+ eq += 0b10000000;
+ return eq;
+}
+
+static void set_led_color_rgb(LED_TYPE color, int pos) {
+ uint8_t* tx_start = &txbuf[PREAMBLE_SIZE];
+
+#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
+ for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + j] = get_protocol_eq(color.g, j);
+ for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE + j] = get_protocol_eq(color.r, j);
+ for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE * 2 + j] = get_protocol_eq(color.b, j);
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
+ for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + j] = get_protocol_eq(color.r, j);
+ for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE + j] = get_protocol_eq(color.g, j);
+ for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE * 2 + j] = get_protocol_eq(color.b, j);
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
+ for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + j] = get_protocol_eq(color.b, j);
+ for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE + j] = get_protocol_eq(color.g, j);
+ for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE * 2 + j] = get_protocol_eq(color.r, j);
+#endif
+}
+
+void ws2812_init(void) {
+ palSetLineMode(RGB_DI_PIN, WS2812_MOSI_OUTPUT_MODE);
+
+#ifdef WS2812_SPI_SCK_PIN
+ palSetLineMode(WS2812_SPI_SCK_PIN, WS2812_SCK_OUTPUT_MODE);
+#endif // WS2812_SPI_SCK_PIN
+
+ // TODO: more dynamic baudrate
+ static const SPIConfig spicfg = {WS2812_SPI_BUFFER_MODE, NULL, PAL_PORT(RGB_DI_PIN), PAL_PAD(RGB_DI_PIN), WS2812_SPI_DIVISOR};
+
+ spiAcquireBus(&WS2812_SPI); /* Acquire ownership of the bus. */
+ spiStart(&WS2812_SPI, &spicfg); /* Setup transfer parameters. */
+ spiSelect(&WS2812_SPI); /* Slave Select assertion. */
+#ifdef WS2812_SPI_USE_CIRCULAR_BUFFER
+ spiStartSend(&WS2812_SPI, sizeof(txbuf) / sizeof(txbuf[0]), txbuf);
+#endif
+}
+
+void ws2812_setleds(LED_TYPE* ledarray, uint16_t leds) {
+ static bool s_init = false;
+ if (!s_init) {
+ ws2812_init();
+ s_init = true;
+ }
+
+ for (uint8_t i = 0; i < leds; i++) {
+ set_led_color_rgb(ledarray[i], i);
+ }
+
+ // Send async - each led takes ~0.03ms, 50 leds ~1.5ms, animations flushing faster than send will cause issues.
+ // Instead spiSend can be used to send synchronously (or the thread logic can be added back).
+#ifndef WS2812_SPI_USE_CIRCULAR_BUFFER
+# ifdef WS2812_SPI_SYNC
+ spiSend(&WS2812_SPI, sizeof(txbuf) / sizeof(txbuf[0]), txbuf);
+# else
+ spiStartSend(&WS2812_SPI, sizeof(txbuf) / sizeof(txbuf[0]), txbuf);
+# endif
+#endif
+}