/* Copyright 2017 Jason Williams * Copyright 2018 Jack Humbert * Copyright 2018 Yiancar * Copyright 2020 MelGeek * Copyright 2021 MasterSpoon * * 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 . */ #include "is31fl3742a.h" #include "i2c_master.h" #include "wait.h" #define IS31FL3742A_PWM_REGISTER_COUNT 180 #define IS31FL3742A_SCALING_REGISTER_COUNT 180 #ifndef IS31FL3742A_I2C_TIMEOUT # define IS31FL3742A_I2C_TIMEOUT 100 #endif #ifndef IS31FL3742A_I2C_PERSISTENCE # define IS31FL3742A_I2C_PERSISTENCE 0 #endif #ifndef IS31FL3742A_CONFIGURATION # define IS31FL3742A_CONFIGURATION 0x31 #endif #ifndef IS31FL3742A_PWM_FREQUENCY # define IS31FL3742A_PWM_FREQUENCY IS31FL3742A_PWM_FREQUENCY_29K_HZ #endif #ifndef IS31FL3742A_SW_PULLDOWN # define IS31FL3742A_SW_PULLDOWN IS31FL3742A_PDR_8K_OHM #endif #ifndef IS31FL3742A_CS_PULLUP # define IS31FL3742A_CS_PULLUP IS31FL3742A_PUR_8K_OHM #endif #ifndef IS31FL3742A_GLOBAL_CURRENT # define IS31FL3742A_GLOBAL_CURRENT 0xFF #endif const uint8_t i2c_addresses[IS31FL3742A_DRIVER_COUNT] = { IS31FL3742A_I2C_ADDRESS_1, #ifdef IS31FL3742A_I2C_ADDRESS_2 IS31FL3742A_I2C_ADDRESS_2, # ifdef IS31FL3742A_I2C_ADDRESS_3 IS31FL3742A_I2C_ADDRESS_3, # ifdef IS31FL3742A_I2C_ADDRESS_4 IS31FL3742A_I2C_ADDRESS_4, # endif # endif #endif }; uint8_t g_pwm_buffer[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_PWM_REGISTER_COUNT]; bool g_pwm_buffer_update_required[IS31FL3742A_DRIVER_COUNT] = {false}; bool g_scaling_registers_update_required[IS31FL3742A_DRIVER_COUNT] = {false}; uint8_t g_scaling_registers[IS31FL3742A_DRIVER_COUNT][IS31FL3742A_SCALING_REGISTER_COUNT]; void is31fl3742a_write_register(uint8_t index, uint8_t reg, uint8_t data) { #if IS31FL3742A_I2C_PERSISTENCE > 0 for (uint8_t i = 0; i < IS31FL3742A_I2C_PERSISTENCE; i++) { if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break; } #else i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3742A_I2C_TIMEOUT); #endif } void is31fl3742a_select_page(uint8_t index, uint8_t page) { is31fl3742a_write_register(index, IS31FL3742A_REG_COMMAND_WRITE_LOCK, IS31FL3742A_COMMAND_WRITE_LOCK_MAGIC); is31fl3742a_write_register(index, IS31FL3742A_REG_COMMAND, page); } void is31fl3742a_write_pwm_buffer(uint8_t index) { // Assumes page 0 is already selected. // Transmit PWM registers in 6 transfers of 30 bytes. // Iterate over the pwm_buffer contents at 30 byte intervals. for (uint8_t i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i += 30) { #if IS31FL3742A_I2C_PERSISTENCE > 0 for (uint8_t j = 0; j < IS31FL3742A_I2C_PERSISTENCE; j++) { if (i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break; } #else i2c_write_register(i2c_addresses[index] << 1, i, g_pwm_buffer[index] + i, 30, IS31FL3742A_I2C_TIMEOUT); #endif } } void is31fl3742a_init_drivers(void) { i2c_init(); for (uint8_t i = 0; i < IS31FL3742A_DRIVER_COUNT; i++) { is31fl3742a_init(i); } for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) { is31fl3742a_set_scaling_register(i, 0xFF, 0xFF, 0xFF); } for (uint8_t i = 0; i < IS31FL3742A_DRIVER_COUNT; i++) { is31fl3742a_update_scaling_registers(i); } } void is31fl3742a_init(uint8_t index) { // 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. is31fl3742a_select_page(index, IS31FL3742A_COMMAND_SCALING); // Turn off all LEDs. for (uint8_t i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) { is31fl3742a_write_register(index, i, 0x00); } is31fl3742a_select_page(index, IS31FL3742A_COMMAND_PWM); for (uint8_t i = 0; i < IS31FL3742A_PWM_REGISTER_COUNT; i++) { is31fl3742a_write_register(index, i, 0x00); } is31fl3742a_select_page(index, IS31FL3742A_COMMAND_FUNCTION); is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_PULLDOWNUP, (IS31FL3742A_SW_PULLDOWN << 4) | IS31FL3742A_CS_PULLUP); is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3742A_GLOBAL_CURRENT); is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_PWM_FREQUENCY, (IS31FL3742A_PWM_FREQUENCY & 0b0111)); is31fl3742a_write_register(index, IS31FL3742A_FUNCTION_REG_CONFIGURATION, IS31FL3742A_CONFIGURATION); // Wait 10ms to ensure the device has woken up. wait_ms(10); } void is31fl3742a_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) { is31fl3742a_led_t led; if (index >= 0 && index < IS31FL3742A_LED_COUNT) { memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led)); if (g_pwm_buffer[led.driver][led.r] == red && g_pwm_buffer[led.driver][led.g] == green && g_pwm_buffer[led.driver][led.b] == blue) { return; } g_pwm_buffer[led.driver][led.r] = red; g_pwm_buffer[led.driver][led.g] = green; g_pwm_buffer[led.driver][led.b] = blue; g_pwm_buffer_update_required[led.driver] = true; } } void is31fl3742a_set_color_all(uint8_t red, uint8_t green, uint8_t blue) { for (int i = 0; i < IS31FL3742A_LED_COUNT; i++) { is31fl3742a_set_color(i, red, green, blue); } } void is31fl3742a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue) { is31fl3742a_led_t led; memcpy_P(&led, (&g_is31fl3742a_leds[index]), sizeof(led)); g_scaling_registers[led.driver][led.r] = red; g_scaling_registers[led.driver][led.g] = green; g_scaling_registers[led.driver][led.b] = blue; g_scaling_registers_update_required[led.driver] = true; } void is31fl3742a_update_pwm_buffers(uint8_t index) { if (g_pwm_buffer_update_required[index]) { is31fl3742a_select_page(index, IS31FL3742A_COMMAND_PWM); is31fl3742a_write_pwm_buffer(index); g_pwm_buffer_update_required[index] = false; } } void is31fl3742a_update_scaling_registers(uint8_t index) { if (g_scaling_registers_update_required[index]) { is31fl3742a_select_page(index, IS31FL3742A_COMMAND_SCALING); for (uint8_t i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) { is31fl3742a_write_register(index, i, g_scaling_registers[index][i]); } g_scaling_registers_update_required[index] = false; } } void is31fl3742a_flush(void) { for (uint8_t i = 0; i < IS31FL3742A_DRIVER_COUNT; i++) { is31fl3742a_update_pwm_buffers(i); } }