diff options
Diffstat (limited to 'drivers/led/issi/is31fl3736-simple.c')
| -rw-r--r-- | drivers/led/issi/is31fl3736-simple.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/drivers/led/issi/is31fl3736-simple.c b/drivers/led/issi/is31fl3736-simple.c new file mode 100644 index 0000000000..d8262c3416 --- /dev/null +++ b/drivers/led/issi/is31fl3736-simple.c @@ -0,0 +1,235 @@ +/* Copyright 2018 Jason Williams (Wilba) + * Copyright 2021 Doni Crosby + * + * 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 "is31fl3736-simple.h" +#include <string.h> +#include "i2c_master.h" +#include "wait.h" + +#define IS31FL3736_COMMANDREGISTER 0xFD +#define IS31FL3736_COMMANDREGISTER_WRITELOCK 0xFE +#define IS31FL3736_INTERRUPTMASKREGISTER 0xF0 +#define IS31FL3736_INTERRUPTSTATUSREGISTER 0xF1 + +#define IS31FL3736_PAGE_LEDCONTROL 0x00 // PG0 +#define IS31FL3736_PAGE_PWM 0x01 // PG1 +#define IS31FL3736_PAGE_AUTOBREATH 0x02 // PG2 +#define IS31FL3736_PAGE_FUNCTION 0x03 // PG3 + +#define IS31FL3736_REG_CONFIGURATION 0x00 // PG3 +#define IS31FL3736_REG_GLOBALCURRENT 0x01 // PG3 +#define IS31FL3736_REG_RESET 0x11 // PG3 +#define IS31FL3736_REG_SWPULLUP 0x0F // PG3 +#define IS31FL3736_REG_CSPULLUP 0x10 // PG3 + +#ifndef IS31FL3736_I2C_TIMEOUT +# define IS31FL3736_I2C_TIMEOUT 100 +#endif + +#ifndef IS31FL3736_I2C_PERSISTENCE +# define IS31FL3736_I2C_PERSISTENCE 0 +#endif + +#ifndef IS31FL3736_PWM_FREQUENCY +# define IS31FL3736_PWM_FREQUENCY IS31FL3736_PWM_FREQUENCY_8K4_HZ // PFS - IS31FL3736B only +#endif + +#ifndef IS31FL3736_SWPULLUP +# define IS31FL3736_SWPULLUP IS31FL3736_PUR_0R +#endif + +#ifndef IS31FL3736_CSPULLUP +# define IS31FL3736_CSPULLUP IS31FL3736_PUR_0R +#endif + +#ifndef IS31FL3736_GLOBALCURRENT +# define IS31FL3736_GLOBALCURRENT 0xFF +#endif + +// Transfer buffer for TWITransmitData() +uint8_t g_twi_transfer_buffer[20]; + +// These buffers match the IS31FL3736 PWM registers. +// The control buffers match the PG0 LED On/Off registers. +// Storing them like this is optimal for I2C transfers to the registers. +// We could optimize this and take out the unused registers from these +// buffers and the transfers in is31fl3736_write_pwm_buffer() but it's +// probably not worth the extra complexity. +uint8_t g_pwm_buffer[IS31FL3736_DRIVER_COUNT][192]; +bool g_pwm_buffer_update_required[IS31FL3736_DRIVER_COUNT] = {false}; + +uint8_t g_led_control_registers[IS31FL3736_DRIVER_COUNT][24] = {0}; +bool g_led_control_registers_update_required[IS31FL3736_DRIVER_COUNT] = {false}; + +void is31fl3736_write_register(uint8_t addr, uint8_t reg, uint8_t data) { + g_twi_transfer_buffer[0] = reg; + g_twi_transfer_buffer[1] = data; + +#if IS31FL3736_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) { + if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3736_I2C_TIMEOUT) == 0) break; + } +#else + i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3736_I2C_TIMEOUT); +#endif +} + +void is31fl3736_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { + // assumes PG1 is already selected + + // transmit PWM registers in 12 transfers of 16 bytes + // g_twi_transfer_buffer[] is 20 bytes + + // iterate over the pwm_buffer contents at 16 byte intervals + for (int i = 0; i < 192; i += 16) { + g_twi_transfer_buffer[0] = i; + // copy the data from i to i+15 + // device will auto-increment register for data after the first byte + // thus this sets registers 0x00-0x0F, 0x10-0x1F, etc. in one transfer + memcpy(g_twi_transfer_buffer + 1, pwm_buffer + i, 16); + +#if IS31FL3736_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3736_I2C_PERSISTENCE; i++) { + if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3736_I2C_TIMEOUT) == 0) break; + } +#else + i2c_transmit(addr << 1, g_twi_transfer_buffer, 17, IS31FL3736_I2C_TIMEOUT); +#endif + } +} + +void is31fl3736_init(uint8_t addr) { + // In order to avoid the LEDs being driven with garbage data + // in the LED driver's PWM registers, shutdown is enabled last. + // Set up the mode and other settings, clear the PWM registers, + // then disable software shutdown. + + // Unlock the command register. + is31fl3736_write_register(addr, IS31FL3736_COMMANDREGISTER_WRITELOCK, 0xC5); + + // Select PG0 + is31fl3736_write_register(addr, IS31FL3736_COMMANDREGISTER, IS31FL3736_PAGE_LEDCONTROL); + // Turn off all LEDs. + for (int i = 0x00; i <= 0x17; i++) { + is31fl3736_write_register(addr, i, 0x00); + } + + // Unlock the command register. + is31fl3736_write_register(addr, IS31FL3736_COMMANDREGISTER_WRITELOCK, 0xC5); + + // Select PG1 + is31fl3736_write_register(addr, IS31FL3736_COMMANDREGISTER, IS31FL3736_PAGE_PWM); + // Set PWM on all LEDs to 0 + // No need to setup Breath registers to PWM as that is the default. + for (int i = 0x00; i <= 0xBF; i++) { + is31fl3736_write_register(addr, i, 0x00); + } + + // Unlock the command register. + is31fl3736_write_register(addr, IS31FL3736_COMMANDREGISTER_WRITELOCK, 0xC5); + + // Select PG3 + is31fl3736_write_register(addr, IS31FL3736_COMMANDREGISTER, IS31FL3736_PAGE_FUNCTION); + // Set de-ghost pull-up resistors (SWx) + is31fl3736_write_register(addr, IS31FL3736_REG_SWPULLUP, IS31FL3736_SWPULLUP); + // Set de-ghost pull-down resistors (CSx) + is31fl3736_write_register(addr, IS31FL3736_REG_CSPULLUP, IS31FL3736_CSPULLUP); + // Set global current to maximum. + is31fl3736_write_register(addr, IS31FL3736_REG_GLOBALCURRENT, IS31FL3736_GLOBALCURRENT); + // Disable software shutdown. + is31fl3736_write_register(addr, IS31FL3736_REG_CONFIGURATION, ((IS31FL3736_PWM_FREQUENCY & 0b111) << 3) | 0x01); + + // Wait 10ms to ensure the device has woken up. + wait_ms(10); +} + +void is31fl3736_set_value(int index, uint8_t value) { + is31fl3736_led_t led; + if (index >= 0 && index < LED_MATRIX_LED_COUNT) { + memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led)); + + if (g_pwm_buffer[led.driver][led.v] == value) { + return; + } + g_pwm_buffer[led.driver][led.v] = value; + g_pwm_buffer_update_required[led.driver] = true; + } +} + +void is31fl3736_set_value_all(uint8_t value) { + for (int i = 0; i < LED_MATRIX_LED_COUNT; i++) { + is31fl3736_set_value(i, value); + } +} + +void is31fl3736_set_led_control_register(uint8_t index, bool value) { + is31fl3736_led_t led; + memcpy_P(&led, (&g_is31fl3736_leds[index]), sizeof(led)); + + // The PWM register for a matrix position (0x00 to 0xBF) is interleaved, so: + // A1=0x00 A2=0x02 A3=0x04 A4=0x06 A5=0x08 A6=0x0A A7=0x0C A8=0x0E + // B1=0x10 B2=0x12 B3=0x14 + // But also, the LED control registers (0x00 to 0x17) are also interleaved, so: + // A1-A4=0x00 A5-A8=0x01 + + uint8_t control_register = led.v / 8; + uint8_t bit_value = led.v % 8; + + if (value) { + g_led_control_registers[led.driver][control_register] |= (1 << bit_value); + } else { + g_led_control_registers[led.driver][control_register] &= ~(1 << bit_value); + } + + g_led_control_registers_update_required[led.driver] = true; +} + +void is31fl3736_update_pwm_buffers(uint8_t addr, uint8_t index) { + if (g_pwm_buffer_update_required[index]) { + // Firstly we need to unlock the command register and select PG1 + is31fl3736_write_register(addr, IS31FL3736_COMMANDREGISTER_WRITELOCK, 0xC5); + is31fl3736_write_register(addr, IS31FL3736_COMMANDREGISTER, IS31FL3736_PAGE_PWM); + + is31fl3736_write_pwm_buffer(addr, g_pwm_buffer[index]); + g_pwm_buffer_update_required[index] = false; + } +} + +void is31fl3736_update_led_control_registers(uint8_t addr, uint8_t index) { + if (g_led_control_registers_update_required[index]) { + // Firstly we need to unlock the command register and select PG0 + is31fl3736_write_register(addr, IS31FL3736_COMMANDREGISTER_WRITELOCK, 0xC5); + is31fl3736_write_register(addr, IS31FL3736_COMMANDREGISTER, IS31FL3736_PAGE_LEDCONTROL); + for (int i = 0; i < 24; i++) { + is31fl3736_write_register(addr, i, g_led_control_registers[index][i]); + } + g_led_control_registers_update_required[index] = false; + } +} + +void is31fl3736_flush(void) { + is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_1, 0); +#if defined(IS31FL3736_I2C_ADDRESS_2) + is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_2, 1); +# if defined(IS31FL3736_I2C_ADDRESS_3) + is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_3, 2); +# if defined(IS31FL3736_I2C_ADDRESS_4) + is31fl3736_update_pwm_buffers(IS31FL3736_I2C_ADDRESS_4, 3); +# endif +# endif +#endif +} |