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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 "is31fl3746a.h"
#include "i2c_master.h"
#include "gpio.h"
#include "wait.h"
#define IS31FL3746A_PWM_REGISTER_COUNT 72
#define IS31FL3746A_SCALING_REGISTER_COUNT 72
#ifndef IS31FL3746A_I2C_TIMEOUT
# define IS31FL3746A_I2C_TIMEOUT 100
#endif
#ifndef IS31FL3746A_I2C_PERSISTENCE
# define IS31FL3746A_I2C_PERSISTENCE 0
#endif
#ifndef IS31FL3746A_CONFIGURATION
# define IS31FL3746A_CONFIGURATION 0x01
#endif
#ifndef IS31FL3746A_PWM_FREQUENCY
# define IS31FL3746A_PWM_FREQUENCY IS31FL3746A_PWM_FREQUENCY_29K_HZ
#endif
#ifndef IS31FL3746A_SW_PULLDOWN
# define IS31FL3746A_SW_PULLDOWN IS31FL3746A_PDR_2K_OHM_SW_OFF
#endif
#ifndef IS31FL3746A_CS_PULLUP
# define IS31FL3746A_CS_PULLUP IS31FL3746A_PUR_2K_OHM_CS_OFF
#endif
#ifndef IS31FL3746A_GLOBAL_CURRENT
# define IS31FL3746A_GLOBAL_CURRENT 0xFF
#endif
const uint8_t i2c_addresses[IS31FL3746A_DRIVER_COUNT] = {
IS31FL3746A_I2C_ADDRESS_1,
#ifdef IS31FL3746A_I2C_ADDRESS_2
IS31FL3746A_I2C_ADDRESS_2,
# ifdef IS31FL3746A_I2C_ADDRESS_3
IS31FL3746A_I2C_ADDRESS_3,
# ifdef IS31FL3746A_I2C_ADDRESS_4
IS31FL3746A_I2C_ADDRESS_4,
# endif
# endif
#endif
};
typedef struct is31fl3746a_driver_t {
uint8_t pwm_buffer[IS31FL3746A_PWM_REGISTER_COUNT];
bool pwm_buffer_dirty;
uint8_t scaling_buffer[IS31FL3746A_SCALING_REGISTER_COUNT];
bool scaling_buffer_dirty;
} PACKED is31fl3746a_driver_t;
is31fl3746a_driver_t driver_buffers[IS31FL3746A_DRIVER_COUNT] = {{
.pwm_buffer = {0},
.pwm_buffer_dirty = false,
.scaling_buffer = {0},
.scaling_buffer_dirty = false,
}};
void is31fl3746a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
#if IS31FL3746A_I2C_PERSISTENCE > 0
for (uint8_t i = 0; i < IS31FL3746A_I2C_PERSISTENCE; i++) {
if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
}
#else
i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT);
#endif
}
void is31fl3746a_select_page(uint8_t index, uint8_t page) {
is31fl3746a_write_register(index, IS31FL3746A_REG_COMMAND_WRITE_LOCK, IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC);
is31fl3746a_write_register(index, IS31FL3746A_REG_COMMAND, page);
}
void is31fl3746a_write_pwm_buffer(uint8_t index) {
// Assumes page 0 is already selected.
// Transmit PWM registers in 4 transfers of 18 bytes.
// Iterate over the pwm_buffer contents at 18 byte intervals.
for (uint8_t i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i += 18) {
#if IS31FL3746A_I2C_PERSISTENCE > 0
for (uint8_t j = 0; j < IS31FL3746A_I2C_PERSISTENCE; j++) {
if (i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
}
#else
i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3746A_I2C_TIMEOUT);
#endif
}
}
void is31fl3746a_init_drivers(void) {
i2c_init();
#if defined(IS31FL3746A_SDB_PIN)
gpio_set_pin_output(IS31FL3746A_SDB_PIN);
gpio_write_pin_high(IS31FL3746A_SDB_PIN);
#endif
for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
is31fl3746a_init(i);
}
for (int i = 0; i < IS31FL3746A_LED_COUNT; i++) {
is31fl3746a_set_scaling_register(i, 0xFF, 0xFF, 0xFF);
}
for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
is31fl3746a_update_scaling_registers(i);
}
}
void is31fl3746a_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.
is31fl3746a_select_page(index, IS31FL3746A_COMMAND_SCALING);
// Turn off all LEDs.
for (uint8_t i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
is31fl3746a_write_register(index, i + 1, 0x00);
}
is31fl3746a_select_page(index, IS31FL3746A_COMMAND_PWM);
for (uint8_t i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i++) {
is31fl3746a_write_register(index, i + 1, 0x00);
}
is31fl3746a_select_page(index, IS31FL3746A_COMMAND_FUNCTION);
is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PULLDOWNUP, (IS31FL3746A_SW_PULLDOWN << 4) | IS31FL3746A_CS_PULLUP);
is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3746A_GLOBAL_CURRENT);
is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PWM_ENABLE, 0x01);
is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY, IS31FL3746A_PWM_FREQUENCY);
is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_CONFIGURATION, IS31FL3746A_CONFIGURATION);
// Wait 10ms to ensure the device has woken up.
wait_ms(10);
}
void is31fl3746a_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
is31fl3746a_led_t led;
if (index >= 0 && index < IS31FL3746A_LED_COUNT) {
memcpy_P(&led, (&g_is31fl3746a_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 is31fl3746a_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
for (int i = 0; i < IS31FL3746A_LED_COUNT; i++) {
is31fl3746a_set_color(i, red, green, blue);
}
}
void is31fl3746a_set_scaling_register(uint8_t index, uint8_t red, uint8_t green, uint8_t blue) {
is31fl3746a_led_t led;
memcpy_P(&led, (&g_is31fl3746a_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 is31fl3746a_update_pwm_buffers(uint8_t index) {
if (driver_buffers[index].pwm_buffer_dirty) {
is31fl3746a_select_page(index, IS31FL3746A_COMMAND_PWM);
is31fl3746a_write_pwm_buffer(index);
driver_buffers[index].pwm_buffer_dirty = false;
}
}
void is31fl3746a_update_scaling_registers(uint8_t index) {
if (driver_buffers[index].scaling_buffer_dirty) {
is31fl3746a_select_page(index, IS31FL3746A_COMMAND_SCALING);
for (uint8_t i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
is31fl3746a_write_register(index, i + 1, driver_buffers[index].scaling_buffer[i]);
}
driver_buffers[index].scaling_buffer_dirty = false;
}
}
void is31fl3746a_flush(void) {
for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
is31fl3746a_update_pwm_buffers(i);
}
}
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