diff options
Diffstat (limited to 'drivers/led/issi/is31fl3742a.c')
| -rw-r--r-- | drivers/led/issi/is31fl3742a.c | 219 | 
1 files changed, 219 insertions, 0 deletions
| diff --git a/drivers/led/issi/is31fl3742a.c b/drivers/led/issi/is31fl3742a.c new file mode 100644 index 0000000000..4ff08cd75c --- /dev/null +++ b/drivers/led/issi/is31fl3742a.c @@ -0,0 +1,219 @@ +/* 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 <http://www.gnu.org/licenses/>. + */ + +#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 +}; + +typedef struct is31fl3742a_driver_t { +    uint8_t pwm_buffer[IS31FL3742A_PWM_REGISTER_COUNT]; +    bool    pwm_buffer_dirty; +    uint8_t scaling_buffer[IS31FL3742A_SCALING_REGISTER_COUNT]; +    bool    scaling_buffer_dirty; +} PACKED is31fl3742a_driver_t; + +is31fl3742a_driver_t driver_buffers[IS31FL3742A_DRIVER_COUNT] = {{ +    .pwm_buffer           = {0}, +    .pwm_buffer_dirty     = false, +    .scaling_buffer       = {0}, +    .scaling_buffer_dirty = false, +}}; + +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, driver_buffers[index].pwm_buffer + i, 30, IS31FL3742A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break; +        } +#else +        i2c_write_register(i2c_addresses[index] << 1, i, driver_buffers[index].pwm_buffer + 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 (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 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)); + +    driver_buffers[led.driver].scaling_buffer[led.r] = red; +    driver_buffers[led.driver].scaling_buffer[led.g] = green; +    driver_buffers[led.driver].scaling_buffer[led.b] = blue; +    driver_buffers[led.driver].scaling_buffer_dirty  = true; +} + +void is31fl3742a_update_pwm_buffers(uint8_t index) { +    if (driver_buffers[index].pwm_buffer_dirty) { +        is31fl3742a_select_page(index, IS31FL3742A_COMMAND_PWM); + +        is31fl3742a_write_pwm_buffer(index); + +        driver_buffers[index].pwm_buffer_dirty = false; +    } +} + +void is31fl3742a_update_scaling_registers(uint8_t index) { +    if (driver_buffers[index].scaling_buffer_dirty) { +        is31fl3742a_select_page(index, IS31FL3742A_COMMAND_SCALING); + +        for (uint8_t i = 0; i < IS31FL3742A_SCALING_REGISTER_COUNT; i++) { +            is31fl3742a_write_register(index, i, driver_buffers[index].scaling_buffer[i]); +        } + +        driver_buffers[index].scaling_buffer_dirty = false; +    } +} + +void is31fl3742a_flush(void) { +    for (uint8_t i = 0; i < IS31FL3742A_DRIVER_COUNT; i++) { +        is31fl3742a_update_pwm_buffers(i); +    } +} | 
