diff options
Diffstat (limited to 'drivers/led/issi/is31fl3741-simple.c')
| -rw-r--r-- | drivers/led/issi/is31fl3741-simple.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/drivers/led/issi/is31fl3741-simple.c b/drivers/led/issi/is31fl3741-simple.c new file mode 100644 index 0000000000..7df3030131 --- /dev/null +++ b/drivers/led/issi/is31fl3741-simple.c @@ -0,0 +1,253 @@ +/* Copyright 2017 Jason Williams + * Copyright 2018 Jack Humbert + * Copyright 2018 Yiancar + * Copyright 2020 MelGeek + * + * 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 "is31fl3741-simple.h" +#include <string.h> +#include "i2c_master.h" +#include "wait.h" + +#define IS31FL3741_COMMANDREGISTER 0xFD +#define IS31FL3741_COMMANDREGISTER_WRITELOCK 0xFE +#define IS31FL3741_INTERRUPTMASKREGISTER 0xF0 +#define IS31FL3741_INTERRUPTSTATUSREGISTER 0xF1 +#define IS31FL3741_IDREGISTER 0xFC + +#define IS31FL3741_PAGE_PWM0 0x00 // PG0 +#define IS31FL3741_PAGE_PWM1 0x01 // PG1 +#define IS31FL3741_PAGE_SCALING_0 0x02 // PG2 +#define IS31FL3741_PAGE_SCALING_1 0x03 // PG3 +#define IS31FL3741_PAGE_FUNCTION 0x04 // PG4 + +#define IS31FL3741_REG_CONFIGURATION 0x00 // PG4 +#define IS31FL3741_REG_GLOBALCURRENT 0x01 // PG4 +#define IS31FL3741_REG_PULLDOWNUP 0x02 // PG4 +#define IS31FL3741_REG_PWM_FREQUENCY 0x36 // PG4 +#define IS31FL3741_REG_RESET 0x3F // PG4 + +#ifndef IS31FL3741_I2C_TIMEOUT +# define IS31FL3741_I2C_TIMEOUT 100 +#endif + +#ifndef IS31FL3741_I2C_PERSISTENCE +# define IS31FL3741_I2C_PERSISTENCE 0 +#endif + +#ifndef IS31FL3741_CONFIGURATION +# define IS31FL3741_CONFIGURATION 0x01 +#endif + +#ifndef IS31FL3741_PWM_FREQUENCY +# define IS31FL3741_PWM_FREQUENCY IS31FL3741_PWM_FREQUENCY_29K_HZ +#endif + +#ifndef IS31FL3741_SWPULLUP +# define IS31FL3741_SWPULLUP IS31FL3741_PUR_32KR +#endif + +#ifndef IS31FL3741_CSPULLUP +# define IS31FL3741_CSPULLUP IS31FL3741_PUR_32KR +#endif + +#ifndef IS31FL3741_GLOBALCURRENT +# define IS31FL3741_GLOBALCURRENT 0xFF +#endif + +#define IS31FL3741_MAX_LEDS 351 + +// Transfer buffer for TWITransmitData() +uint8_t g_twi_transfer_buffer[20] = {0xFF}; + +// These buffers match the IS31FL3741 and IS31FL3741A PWM registers. +// The scaling buffers match the PG2 and PG3 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 is31fl3741_write_pwm_buffer() but it's +// probably not worth the extra complexity. +uint8_t g_pwm_buffer[IS31FL3741_DRIVER_COUNT][IS31FL3741_MAX_LEDS]; +bool g_pwm_buffer_update_required[IS31FL3741_DRIVER_COUNT] = {false}; +bool g_scaling_registers_update_required[IS31FL3741_DRIVER_COUNT] = {false}; + +uint8_t g_scaling_registers[IS31FL3741_DRIVER_COUNT][IS31FL3741_MAX_LEDS]; + +void is31fl3741_write_register(uint8_t addr, uint8_t reg, uint8_t data) { + g_twi_transfer_buffer[0] = reg; + g_twi_transfer_buffer[1] = data; + +#if IS31FL3741_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) { + if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3741_I2C_TIMEOUT) == 0) break; + } +#else + i2c_transmit(addr << 1, g_twi_transfer_buffer, 2, IS31FL3741_I2C_TIMEOUT); +#endif +} + +bool is31fl3741_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) { + // Assume PG0 is already selected + + for (int i = 0; i < 342; i += 18) { + if (i == 180) { + // unlock the command register and select PG1 + is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER_WRITELOCK, 0xC5); + is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER, IS31FL3741_PAGE_PWM1); + } + + g_twi_transfer_buffer[0] = i % 180; + memcpy(g_twi_transfer_buffer + 1, pwm_buffer + i, 18); + +#if IS31FL3741_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) { + if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 19, IS31FL3741_I2C_TIMEOUT) != 0) { + return false; + } + } +#else + if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 19, IS31FL3741_I2C_TIMEOUT) != 0) { + return false; + } +#endif + } + + // transfer the left cause the total number is 351 + g_twi_transfer_buffer[0] = 162; + memcpy(g_twi_transfer_buffer + 1, pwm_buffer + 342, 9); + +#if IS31FL3741_I2C_PERSISTENCE > 0 + for (uint8_t i = 0; i < IS31FL3741_I2C_PERSISTENCE; i++) { + if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 10, IS31FL3741_I2C_TIMEOUT) != 0) { + return false; + } + } +#else + if (i2c_transmit(addr << 1, g_twi_transfer_buffer, 10, IS31FL3741_I2C_TIMEOUT) != 0) { + return false; + } +#endif + + return true; +} + +void is31fl3741_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. + + // Unlock the command register. + is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER_WRITELOCK, 0xC5); + + // Select PG4 + is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER, IS31FL3741_PAGE_FUNCTION); + + // Set to Normal operation + is31fl3741_write_register(addr, IS31FL3741_REG_CONFIGURATION, IS31FL3741_CONFIGURATION); + + // Set Golbal Current Control Register + is31fl3741_write_register(addr, IS31FL3741_REG_GLOBALCURRENT, IS31FL3741_GLOBALCURRENT); + // Set Pull up & Down for SWx CSy + is31fl3741_write_register(addr, IS31FL3741_REG_PULLDOWNUP, ((IS31FL3741_CSPULLUP << 4) | IS31FL3741_SWPULLUP)); + // Set PWM frequency + is31fl3741_write_register(addr, IS31FL3741_REG_PWM_FREQUENCY, (IS31FL3741_PWM_FREQUENCY & 0b1111)); + + // is31fl3741_update_led_scaling_registers(addr, 0xFF, 0xFF, 0xFF); + + // Wait 10ms to ensure the device has woken up. + wait_ms(10); +} + +void is31fl3741_set_value(int index, uint8_t value) { + is31_led led; + if (index >= 0 && index < LED_MATRIX_LED_COUNT) { + memcpy_P(&led, (&g_is31_leds[index]), sizeof(led)); + + if (g_pwm_buffer[led.driver][led.v] == value) { + return; + } + g_pwm_buffer_update_required[led.driver] = true; + g_pwm_buffer[led.driver][led.v] = value; + } +} + +void is31fl3741_set_value_all(uint8_t value) { + for (int i = 0; i < LED_MATRIX_LED_COUNT; i++) { + is31fl3741_set_value(i, value); + } +} + +void is31fl3741_set_led_control_register(uint8_t index, bool value) { + is31_led led; + memcpy_P(&led, (&g_is31_leds[index]), sizeof(led)); + + if (value) { + g_scaling_registers[led.driver][led.v] = 0xFF; + } else { + g_scaling_registers[led.driver][led.v] = 0x00; + } + + g_scaling_registers_update_required[led.driver] = true; +} + +void is31fl3741_update_pwm_buffers(uint8_t addr, uint8_t index) { + if (g_pwm_buffer_update_required[index]) { + // unlock the command register and select PG2 + is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER_WRITELOCK, 0xC5); + is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER, IS31FL3741_PAGE_PWM0); + + is31fl3741_write_pwm_buffer(addr, g_pwm_buffer[index]); + } + + g_pwm_buffer_update_required[index] = false; +} + +void is31fl3741_set_pwm_buffer(const is31_led *pled, uint8_t value) { + g_pwm_buffer[pled->driver][pled->v] = value; + + g_pwm_buffer_update_required[pled->driver] = true; +} + +void is31fl3741_update_led_control_registers(uint8_t addr, uint8_t index) { + if (g_scaling_registers_update_required[index]) { + // unlock the command register and select PG2 + is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER_WRITELOCK, 0xC5); + is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER, IS31FL3741_PAGE_SCALING_0); + + // CS1_SW1 to CS30_SW6 are on PG2 + for (int i = CS1_SW1; i <= CS30_SW6; ++i) { + is31fl3741_write_register(addr, i, g_scaling_registers[index][i]); + } + + // unlock the command register and select PG3 + is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER_WRITELOCK, 0xC5); + is31fl3741_write_register(addr, IS31FL3741_COMMANDREGISTER, IS31FL3741_PAGE_SCALING_1); + + // CS1_SW7 to CS39_SW9 are on PG3 + for (int i = CS1_SW7; i <= CS39_SW9; ++i) { + is31fl3741_write_register(addr, i - CS1_SW7, g_scaling_registers[index][i]); + } + + g_scaling_registers_update_required[index] = false; + } +} + +void is31fl3741_set_scaling_registers(const is31_led *pled, uint8_t value) { + g_scaling_registers[pled->driver][pled->v] = value; + + g_scaling_registers_update_required[pled->driver] = true; +} |