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- #include "is31fl3743a-mono.h"
- #include <string.h>
- #include "i2c_master.h"
- #include "wait.h"
-
- #define IS31FL3743A_PWM_REGISTER_COUNT 198
- #define IS31FL3743A_SCALING_REGISTER_COUNT 198
-
- #ifndef IS31FL3743A_I2C_TIMEOUT
- # define IS31FL3743A_I2C_TIMEOUT 100
- #endif
-
- #ifndef IS31FL3743A_I2C_PERSISTENCE
- # define IS31FL3743A_I2C_PERSISTENCE 0
- #endif
-
- #ifndef IS31FL3743A_CONFIGURATION
- # define IS31FL3743A_CONFIGURATION 0x01
- #endif
-
- #ifndef IS31FL3743A_SW_PULLDOWN
- # define IS31FL3743A_SW_PULLDOWN IS31FL3743A_PDR_2K_OHM_SW_OFF
- #endif
-
- #ifndef IS31FL3743A_CS_PULLUP
- # define IS31FL3743A_CS_PULLUP IS31FL3743A_PUR_2K_OHM_CS_OFF
- #endif
-
- #ifndef IS31FL3743A_GLOBAL_CURRENT
- # define IS31FL3743A_GLOBAL_CURRENT 0xFF
- #endif
-
- #ifndef IS31FL3743A_SYNC_1
- # define IS31FL3743A_SYNC_1 IS31FL3743A_SYNC_NONE
- #endif
- #ifndef IS31FL3743A_SYNC_2
- # define IS31FL3743A_SYNC_2 IS31FL3743A_SYNC_NONE
- #endif
- #ifndef IS31FL3743A_SYNC_3
- # define IS31FL3743A_SYNC_3 IS31FL3743A_SYNC_NONE
- #endif
- #ifndef IS31FL3743A_SYNC_4
- # define IS31FL3743A_SYNC_4 IS31FL3743A_SYNC_NONE
- #endif
-
- uint8_t i2c_transfer_buffer[20] = {0xFF};
-
- uint8_t g_pwm_buffer[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_PWM_REGISTER_COUNT];
- bool g_pwm_buffer_update_required[IS31FL3743A_DRIVER_COUNT] = {false};
- bool g_scaling_registers_update_required[IS31FL3743A_DRIVER_COUNT] = {false};
-
- uint8_t g_scaling_registers[IS31FL3743A_DRIVER_COUNT][IS31FL3743A_SCALING_REGISTER_COUNT];
-
- void is31fl3743a_write_register(uint8_t addr, uint8_t reg, uint8_t data) {
- i2c_transfer_buffer[0] = reg;
- i2c_transfer_buffer[1] = data;
-
- #if IS31FL3743A_I2C_PERSISTENCE > 0
- for (uint8_t i = 0; i < IS31FL3743A_I2C_PERSISTENCE; i++) {
- if (i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3743A_I2C_TIMEOUT) == 0) break;
- }
- #else
- i2c_transmit(addr << 1, i2c_transfer_buffer, 2, IS31FL3743A_I2C_TIMEOUT);
- #endif
- }
-
- void is31fl3743a_select_page(uint8_t addr, uint8_t page) {
- is31fl3743a_write_register(addr, IS31FL3743A_REG_COMMAND_WRITE_LOCK, IS31FL3743A_COMMAND_WRITE_LOCK_MAGIC);
- is31fl3743a_write_register(addr, IS31FL3743A_REG_COMMAND, page);
- }
-
- void is31fl3743a_write_pwm_buffer(uint8_t addr, uint8_t *pwm_buffer) {
- // Assumes page 0 is already selected.
- // If any of the transactions fails function returns false.
- // Transmit PWM registers in 12 transfers of 16 bytes.
- // i2c_transfer_buffer[] is 20 bytes
-
- // Iterate over the pwm_buffer contents at 16 byte intervals.
- for (int i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i += 16) {
- i2c_transfer_buffer[0] = i + 1;
- // 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(i2c_transfer_buffer + 1, pwm_buffer + i, 16);
-
- #if IS31FL3743A_I2C_PERSISTENCE > 0
- for (uint8_t i = 0; i < IS31FL3743A_I2C_PERSISTENCE; i++) {
- if (i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3743A_I2C_TIMEOUT) != 0) break;
- }
- #else
- i2c_transmit(addr << 1, i2c_transfer_buffer, 17, IS31FL3743A_I2C_TIMEOUT);
- #endif
- }
- }
-
- void is31fl3743a_init_drivers(void) {
- i2c_init();
-
- is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_1, IS31FL3743A_SYNC_1);
- #if defined(IS31FL3743A_I2C_ADDRESS_2)
- is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_2, IS31FL3743A_SYNC_2);
- # if defined(IS31FL3743A_I2C_ADDRESS_3)
- is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_3, IS31FL3743A_SYNC_3);
- # if defined(IS31FL3743A_I2C_ADDRESS_4)
- is31fl3743a_init(IS31FL3743A_I2C_ADDRESS_4, IS31FL3743A_SYNC_4);
- # endif
- # endif
- #endif
-
- for (int i = 0; i < IS31FL3743A_LED_COUNT; i++) {
- is31fl3743a_set_scaling_register(i, 0xFF);
- }
-
- is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_1, 0);
- #if defined(IS31FL3743A_I2C_ADDRESS_2)
- is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_2, 1);
- # if defined(IS31FL3743A_I2C_ADDRESS_3)
- is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_3, 2);
- # if defined(IS31FL3743A_I2C_ADDRESS_4)
- is31fl3743a_update_scaling_registers(IS31FL3743A_I2C_ADDRESS_4, 3);
- # endif
- # endif
- #endif
- }
-
- void is31fl3743a_init(uint8_t addr, uint8_t sync) {
- // 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.
-
- is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_SCALING);
-
- // Turn off all LEDs.
- for (int i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
- is31fl3743a_write_register(addr, i + 1, 0x00);
- }
-
- is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_PWM);
-
- for (int i = 0; i < IS31FL3743A_PWM_REGISTER_COUNT; i++) {
- is31fl3743a_write_register(addr, i + 1, 0x00);
- }
-
- is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_FUNCTION);
-
- is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_PULLDOWNUP, (IS31FL3743A_SW_PULLDOWN << 4) | IS31FL3743A_CS_PULLUP);
- is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3743A_GLOBAL_CURRENT);
- is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
- is31fl3743a_write_register(addr, IS31FL3743A_FUNCTION_REG_CONFIGURATION, IS31FL3743A_CONFIGURATION);
-
- // Wait 10ms to ensure the device has woken up.
- wait_ms(10);
- }
-
- void is31fl3743a_set_value(int index, uint8_t value) {
- is31fl3743a_led_t led;
- if (index >= 0 && index < IS31FL3743A_LED_COUNT) {
- memcpy_P(&led, (&g_is31fl3743a_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 is31fl3743a_set_value_all(uint8_t value) {
- for (int i = 0; i < IS31FL3743A_LED_COUNT; i++) {
- is31fl3743a_set_value(i, value);
- }
- }
-
- void is31fl3743a_set_scaling_register(uint8_t index, uint8_t value) {
- is31fl3743a_led_t led;
- memcpy_P(&led, (&g_is31fl3743a_leds[index]), sizeof(led));
-
- g_scaling_registers[led.driver][led.v] = value;
-
- g_scaling_registers_update_required[led.driver] = true;
- }
-
- void is31fl3743a_update_pwm_buffers(uint8_t addr, uint8_t index) {
- if (g_pwm_buffer_update_required[index]) {
- is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_PWM);
-
- is31fl3743a_write_pwm_buffer(addr, g_pwm_buffer[index]);
- }
-
- g_pwm_buffer_update_required[index] = false;
- }
-
- void is31fl3743a_update_scaling_registers(uint8_t addr, uint8_t index) {
- if (g_scaling_registers_update_required[index]) {
- is31fl3743a_select_page(addr, IS31FL3743A_COMMAND_SCALING);
-
- for (int i = 0; i < IS31FL3743A_SCALING_REGISTER_COUNT; i++) {
- is31fl3743a_write_register(addr, i + 1, g_scaling_registers[index][i]);
- }
- g_scaling_registers_update_required[index] = false;
- }
- }
-
- void is31fl3743a_flush(void) {
- is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_1, 0);
- #if defined(IS31FL3743A_I2C_ADDRESS_2)
- is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_2, 1);
- # if defined(IS31FL3743A_I2C_ADDRESS_3)
- is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_3, 2);
- # if defined(IS31FL3743A_I2C_ADDRESS_4)
- is31fl3743a_update_pwm_buffers(IS31FL3743A_I2C_ADDRESS_4, 3);
- # endif
- # endif
- #endif
- }
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