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- /* 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 "is31fl3745-mono.h"
- #include "i2c_master.h"
- #include "wait.h"
-
- #define IS31FL3745_PWM_REGISTER_COUNT 144
- #define IS31FL3745_SCALING_REGISTER_COUNT 144
-
- #ifndef IS31FL3745_I2C_TIMEOUT
- # define IS31FL3745_I2C_TIMEOUT 100
- #endif
-
- #ifndef IS31FL3745_I2C_PERSISTENCE
- # define IS31FL3745_I2C_PERSISTENCE 0
- #endif
-
- #ifndef IS31FL3745_CONFIGURATION
- # define IS31FL3745_CONFIGURATION 0x31
- #endif
-
- #ifndef IS31FL3745_SW_PULLDOWN
- # define IS31FL3745_SW_PULLDOWN IS31FL3745_PDR_2K_OHM_SW_OFF
- #endif
-
- #ifndef IS31FL3745_CS_PULLUP
- # define IS31FL3745_CS_PULLUP IS31FL3745_PUR_2K_OHM_CS_OFF
- #endif
-
- #ifndef IS31FL3745_GLOBAL_CURRENT
- # define IS31FL3745_GLOBAL_CURRENT 0xFF
- #endif
-
- #ifndef IS31FL3745_SYNC_1
- # define IS31FL3745_SYNC_1 IS31FL3745_SYNC_NONE
- #endif
- #ifndef IS31FL3745_SYNC_2
- # define IS31FL3745_SYNC_2 IS31FL3745_SYNC_NONE
- #endif
- #ifndef IS31FL3745_SYNC_3
- # define IS31FL3745_SYNC_3 IS31FL3745_SYNC_NONE
- #endif
- #ifndef IS31FL3745_SYNC_4
- # define IS31FL3745_SYNC_4 IS31FL3745_SYNC_NONE
- #endif
-
- const uint8_t i2c_addresses[IS31FL3745_DRIVER_COUNT] = {
- IS31FL3745_I2C_ADDRESS_1,
- #ifdef IS31FL3745_I2C_ADDRESS_2
- IS31FL3745_I2C_ADDRESS_2,
- # ifdef IS31FL3745_I2C_ADDRESS_3
- IS31FL3745_I2C_ADDRESS_3,
- # ifdef IS31FL3745_I2C_ADDRESS_4
- IS31FL3745_I2C_ADDRESS_4,
- # endif
- # endif
- #endif
- };
-
- const uint8_t driver_sync[IS31FL3745_DRIVER_COUNT] = {
- IS31FL3745_SYNC_1,
- #ifdef IS31FL3745_I2C_ADDRESS_2
- IS31FL3745_SYNC_2,
- # ifdef IS31FL3745_I2C_ADDRESS_3
- IS31FL3745_SYNC_3,
- # ifdef IS31FL3745_I2C_ADDRESS_4
- IS31FL3745_SYNC_4,
- # endif
- # endif
- #endif
- };
-
- uint8_t g_pwm_buffer[IS31FL3745_DRIVER_COUNT][IS31FL3745_PWM_REGISTER_COUNT];
- bool g_pwm_buffer_update_required[IS31FL3745_DRIVER_COUNT] = {false};
- bool g_scaling_registers_update_required[IS31FL3745_DRIVER_COUNT] = {false};
-
- uint8_t g_scaling_registers[IS31FL3745_DRIVER_COUNT][IS31FL3745_SCALING_REGISTER_COUNT];
-
- void is31fl3745_write_register(uint8_t index, uint8_t reg, uint8_t data) {
- #if IS31FL3745_I2C_PERSISTENCE > 0
- for (uint8_t i = 0; i < IS31FL3745_I2C_PERSISTENCE; i++) {
- if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
- }
- #else
- i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3745_I2C_TIMEOUT);
- #endif
- }
-
- void is31fl3745_select_page(uint8_t index, uint8_t page) {
- is31fl3745_write_register(index, IS31FL3745_REG_COMMAND_WRITE_LOCK, IS31FL3745_COMMAND_WRITE_LOCK_MAGIC);
- is31fl3745_write_register(index, IS31FL3745_REG_COMMAND, page);
- }
-
- void is31fl3745_write_pwm_buffer(uint8_t index) {
- // Assumes page 0 is already selected.
- // Transmit PWM registers in 8 transfers of 18 bytes.
-
- // Iterate over the pwm_buffer contents at 18 byte intervals.
- for (uint8_t i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i += 18) {
- #if IS31FL3745_I2C_PERSISTENCE > 0
- for (uint8_t j = 0; j < IS31FL3745_I2C_PERSISTENCE; j++) {
- if (i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
- }
- #else
- i2c_write_register(i2c_addresses[index] << 1, i + 1, g_pwm_buffer[index] + i, 18, IS31FL3745_I2C_TIMEOUT);
- #endif
- }
- }
-
- void is31fl3745_init_drivers(void) {
- i2c_init();
-
- for (uint8_t i = 0; i < IS31FL3745_DRIVER_COUNT; i++) {
- is31fl3745_init(i);
- }
-
- for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
- is31fl3745_set_scaling_register(i, 0xFF);
- }
-
- for (uint8_t i = 0; i < IS31FL3745_DRIVER_COUNT; i++) {
- is31fl3745_update_scaling_registers(i);
- }
- }
-
- void is31fl3745_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.
-
- is31fl3745_select_page(index, IS31FL3745_COMMAND_SCALING);
-
- // Turn off all LEDs.
- for (uint8_t i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
- is31fl3745_write_register(index, i + 1, 0x00);
- }
-
- is31fl3745_select_page(index, IS31FL3745_COMMAND_PWM);
-
- for (uint8_t i = 0; i < IS31FL3745_PWM_REGISTER_COUNT; i++) {
- is31fl3745_write_register(index, i + 1, 0x00);
- }
-
- is31fl3745_select_page(index, IS31FL3745_COMMAND_FUNCTION);
-
- uint8_t sync = driver_sync[index];
-
- is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_PULLDOWNUP, (IS31FL3745_SW_PULLDOWN << 4) | IS31FL3745_CS_PULLUP);
- is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3745_GLOBAL_CURRENT);
- is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_SPREAD_SPECTRUM, (sync & 0b11) << 6);
- is31fl3745_write_register(index, IS31FL3745_FUNCTION_REG_CONFIGURATION, IS31FL3745_CONFIGURATION);
-
- // Wait 10ms to ensure the device has woken up.
- wait_ms(10);
- }
-
- void is31fl3745_set_value(int index, uint8_t value) {
- is31fl3745_led_t led;
-
- if (index >= 0 && index < IS31FL3745_LED_COUNT) {
- memcpy_P(&led, (&g_is31fl3745_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 is31fl3745_set_value_all(uint8_t value) {
- for (int i = 0; i < IS31FL3745_LED_COUNT; i++) {
- is31fl3745_set_value(i, value);
- }
- }
-
- void is31fl3745_set_scaling_register(uint8_t index, uint8_t value) {
- is31fl3745_led_t led;
- memcpy_P(&led, (&g_is31fl3745_leds[index]), sizeof(led));
-
- g_scaling_registers[led.driver][led.v] = value;
- g_scaling_registers_update_required[led.driver] = true;
- }
-
- void is31fl3745_update_pwm_buffers(uint8_t index) {
- if (g_pwm_buffer_update_required[index]) {
- is31fl3745_select_page(index, IS31FL3745_COMMAND_PWM);
-
- is31fl3745_write_pwm_buffer(index);
-
- g_pwm_buffer_update_required[index] = false;
- }
- }
-
- void is31fl3745_update_scaling_registers(uint8_t index) {
- if (g_scaling_registers_update_required[index]) {
- is31fl3745_select_page(index, IS31FL3745_COMMAND_SCALING);
-
- for (uint8_t i = 0; i < IS31FL3745_SCALING_REGISTER_COUNT; i++) {
- is31fl3745_write_register(index, i + 1, g_scaling_registers[index][i]);
- }
-
- g_scaling_registers_update_required[index] = false;
- }
- }
-
- void is31fl3745_flush(void) {
- for (uint8_t i = 0; i < IS31FL3745_DRIVER_COUNT; i++) {
- is31fl3745_update_pwm_buffers(i);
- }
- }
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