/* Copyright 2024 HorrorTroll * Copyright 2024 Harrison Chan (Xelus) * Copyright 2024 Dimitris Mantzouranis * * 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 "is31fl3729.h" #include "i2c_master.h" #include "wait.h" #define IS31FL3729_PWM_REGISTER_COUNT 143 #define IS31FL3729_SCALING_REGISTER_COUNT 16 #ifndef IS31FL3729_I2C_TIMEOUT # define IS31FL3729_I2C_TIMEOUT 100 #endif #ifndef IS31FL3729_I2C_PERSISTENCE # define IS31FL3729_I2C_PERSISTENCE 0 #endif #ifndef IS31FL3729_CONFIGURATION # define IS31FL3729_CONFIGURATION IS31FL3729_CONFIG_SWS_15_9 #endif #ifndef IS31FL3729_GLOBAL_CURRENT # define IS31FL3729_GLOBAL_CURRENT 0x40 #endif #ifndef IS31FL3729_PULLDOWNUP # define IS31FL3729_PULLDOWNUP 0x33 #endif #ifndef IS31FL3729_SPREAD_SPECTRUM # define IS31FL3729_SPREAD_SPECTRUM IS31FL3729_SSP_DISABLE #endif #ifndef IS31FL3729_SPREAD_SPECTRUM_RANGE # define IS31FL3729_SPREAD_SPECTRUM_RANGE IS31FL3729_RNG_5_PERCENT #endif #ifndef IS31FL3729_SPREAD_SPECTRUM_CYCLE_TIME # define IS31FL3729_SPREAD_SPECTRUM_CYCLE_TIME IS31FL3729_CLT_1980_US #endif #ifndef IS31FL3729_PWM_FREQUENCY # define IS31FL3729_PWM_FREQUENCY IS31FL3729_PWM_FREQUENCY_32K_HZ #endif // These buffers match the PWM & scaling registers. // Storing them like this is optimal for I2C transfers to the registers. typedef struct is31fl3729_driver_t { uint8_t pwm_buffer[IS31FL3729_PWM_REGISTER_COUNT]; bool pwm_buffer_dirty; uint8_t scaling_buffer[IS31FL3729_SCALING_REGISTER_COUNT]; bool scaling_buffer_dirty; } PACKED is31fl3729_driver_t; is31fl3729_driver_t driver_buffers[IS31FL3729_DRIVER_COUNT] = {{ .pwm_buffer = {0}, .pwm_buffer_dirty = false, .scaling_buffer = {0}, .scaling_buffer_dirty = false, }}; void is31fl3729_write_register(uint8_t addr, uint8_t reg, uint8_t data) { #if IS31FL3729_I2C_PERSISTENCE > 0 for (uint8_t i = 0; i < IS31FL3729_I2C_PERSISTENCE; i++) { if (i2c_write_register(addr << 1, reg, &data, 1, IS31FL3729_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break; } #else i2c_write_register(addr << 1, reg, &data, 1, IS31FL3729_I2C_TIMEOUT); #endif } void is31fl3729_write_pwm_buffer(uint8_t addr, uint8_t index) { // Transmit PWM registers in 9 transfers of 16 bytes. // Iterate over the pwm_buffer contents at 16 byte intervals. for (uint8_t i = 0; i <= IS31FL3729_PWM_REGISTER_COUNT; i += 16) { #if IS31FL3729_I2C_PERSISTENCE > 0 for (uint8_t j = 0; j < IS31FL3729_I2C_PERSISTENCE; j++) { if (i2c_write_register(addr << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3729_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break; } #else i2c_write_register(addr << 1, i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3729_I2C_TIMEOUT); #endif } } void is31fl3729_init_drivers(void) { i2c_init(); is31fl3729_init(IS31FL3729_I2C_ADDRESS_1); #if defined(IS31FL3729_I2C_ADDRESS_2) is31fl3729_init(IS31FL3729_I2C_ADDRESS_2); # if defined(IS31FL3729_I2C_ADDRESS_3) is31fl3729_init(IS31FL3729_I2C_ADDRESS_3); # if defined(IS31FL3729_I2C_ADDRESS_4) is31fl3729_init(IS31FL3729_I2C_ADDRESS_4); # endif # endif #endif for (int i = 0; i < IS31FL3729_LED_COUNT; i++) { is31fl3729_set_scaling_register(i, 0xFF, 0xFF, 0xFF); } is31fl3729_update_scaling_registers(IS31FL3729_I2C_ADDRESS_1, 0); #if defined(IS31FL3729_I2C_ADDRESS_2) is31fl3729_update_scaling_registers(IS31FL3729_I2C_ADDRESS_2, 1); # if defined(IS31FL3729_I2C_ADDRESS_3) is31fl3729_update_scaling_registers(IS31FL3729_I2C_ADDRESS_3, 2); # if defined(IS31FL3729_I2C_ADDRESS_4) is31fl3729_update_scaling_registers(IS31FL3729_I2C_ADDRESS_4, 3); # endif # endif #endif } void is31fl3729_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. // Set Pull up & Down for SWx CSy is31fl3729_write_register(addr, IS31FL3729_REG_PULLDOWNUP, IS31FL3729_PULLDOWNUP); // Set Spread Spectrum Register if applicable is31fl3729_write_register(addr, IS31FL3729_REG_SPREAD_SPECTRUM, ((IS31FL3729_SPREAD_SPECTRUM & 0b1) << 4) | ((IS31FL3729_SPREAD_SPECTRUM_RANGE & 0b11) << 2) | (IS31FL3729_SPREAD_SPECTRUM_CYCLE_TIME & 0b11)); // Set PWM Frequency Register if applicable is31fl3729_write_register(addr, IS31FL3729_REG_PWM_FREQUENCY, IS31FL3729_PWM_FREQUENCY); // Set Golbal Current Control Register is31fl3729_write_register(addr, IS31FL3729_REG_GLOBAL_CURRENT, IS31FL3729_GLOBAL_CURRENT); // Set to Normal operation is31fl3729_write_register(addr, IS31FL3729_REG_CONFIGURATION, IS31FL3729_CONFIGURATION); // Wait 10ms to ensure the device has woken up. wait_ms(10); } void is31fl3729_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) { is31fl3729_led_t led; if (index >= 0 && index < IS31FL3729_LED_COUNT) { memcpy_P(&led, (&g_is31fl3729_leds[index]), sizeof(led)); if (driver_buffers[led.driver].pwm_buffer[led.r] == red && driver_buffers[led.driver].pwm_buffer[led.g] == green && driver_buffers[led.driver].pwm_buffer[led.b] == blue) { return; } driver_buffers[led.driver].pwm_buffer[led.r] = red; driver_buffers[led.driver].pwm_buffer[led.g] = green; driver_buffers[led.driver].pwm_buffer[led.b] = blue; driver_buffers[led.driver].pwm_buffer_dirty = true; } } void is31fl3729_set_color_all(uint8_t red, uint8_t green, uint8_t blue) { for (int i = 0; i < IS31FL3729_LED_COUNT; i++) { is31fl3729_set_color(i, red, green, blue); } } void is31fl3729_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue) { is31fl3729_led_t led; memcpy_P(&led, (&g_is31fl3729_leds[index]), sizeof(led)); // need to do a bit of checking here since 3729 scaling is per CS pin. // not the usual per RGB key as per other ISSI drivers // only enable them, since they should be default disabled int cs_red = (led.r & 0x0F) - 1; int cs_green = (led.g & 0x0F) - 1; int cs_blue = (led.b & 0x0F) - 1; driver_buffers[led.driver].scaling_buffer[cs_red] = red; driver_buffers[led.driver].scaling_buffer[cs_green] = green; driver_buffers[led.driver].scaling_buffer[cs_blue] = blue; driver_buffers[led.driver].scaling_buffer_dirty = true; } void is31fl3729_update_pwm_buffers(uint8_t addr, uint8_t index) { if (driver_buffers[index].pwm_buffer_dirty) { is31fl3729_write_pwm_buffer(addr, index); driver_buffers[index].pwm_buffer_dirty = false; } } void is31fl3729_update_scaling_registers(uint8_t addr, uint8_t index) { if (driver_buffers[index].scaling_buffer_dirty) { for (uint8_t i = 0; i < IS31FL3729_SCALING_REGISTER_COUNT; i++) { is31fl3729_write_register(addr, IS31FL3729_REG_SCALING + i, driver_buffers[index].scaling_buffer[i]); } driver_buffers[index].scaling_buffer_dirty = false; } } void is31fl3729_flush(void) { is31fl3729_update_pwm_buffers(IS31FL3729_I2C_ADDRESS_1, 0); #if defined(IS31FL3729_I2C_ADDRESS_2) is31fl3729_update_pwm_buffers(IS31FL3729_I2C_ADDRESS_2, 1); # if defined(IS31FL3729_I2C_ADDRESS_3) is31fl3729_update_pwm_buffers(IS31FL3729_I2C_ADDRESS_3, 2); # if defined(IS31FL3729_I2C_ADDRESS_4) is31fl3729_update_pwm_buffers(IS31FL3729_I2C_ADDRESS_4, 3); # endif # endif #endif }