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/* Copyright 2024 HorrorTroll <https://github.com/HorrorTroll>
* Copyright 2024 Harrison Chan (Xelus)
* Copyright 2024 Dimitris Mantzouranis <d3xter93@gmail.com>
*
* 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 "is31fl3729.h"
#include "i2c_master.h"
#include "gpio.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_SW_PULLDOWN
# define IS31FL3729_SW_PULLDOWN IS31FL3729_SW_PULLDOWN_2K_OHM_SW_OFF
#endif
#ifndef IS31FL3729_CS_PULLUP
# define IS31FL3729_CS_PULLUP IS31FL3729_CS_PULLUP_2K_OHM_CS_OFF
#endif
#ifndef IS31FL3729_SPREAD_SPECTRUM
# define IS31FL3729_SPREAD_SPECTRUM IS31FL3729_SPREAD_SPECTRUM_DISABLE
#endif
#ifndef IS31FL3729_SPREAD_SPECTRUM_RANGE
# define IS31FL3729_SPREAD_SPECTRUM_RANGE IS31FL3729_SPREAD_SPECTRUM_RANGE_5_PERCENT
#endif
#ifndef IS31FL3729_SPREAD_SPECTRUM_CYCLE_TIME
# define IS31FL3729_SPREAD_SPECTRUM_CYCLE_TIME IS31FL3729_SPREAD_SPECTRUM_CYCLE_TIME_1980_US
#endif
#ifndef IS31FL3729_PWM_FREQUENCY
# define IS31FL3729_PWM_FREQUENCY IS31FL3729_PWM_FREQUENCY_32K_HZ
#endif
const uint8_t i2c_addresses[IS31FL3729_DRIVER_COUNT] = {
IS31FL3729_I2C_ADDRESS_1,
#ifdef IS31FL3729_I2C_ADDRESS_2
IS31FL3729_I2C_ADDRESS_2,
# ifdef IS31FL3729_I2C_ADDRESS_3
IS31FL3729_I2C_ADDRESS_3,
# ifdef IS31FL3729_I2C_ADDRESS_4
IS31FL3729_I2C_ADDRESS_4,
# endif
# endif
#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 index, 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(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3729_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
}
#else
i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3729_I2C_TIMEOUT);
#endif
}
void is31fl3729_write_pwm_buffer(uint8_t index) {
// Transmit PWM registers in 11 transfers of 13 bytes.
// Iterate over the pwm_buffer contents at 13 byte intervals.
for (uint8_t i = 0; i <= IS31FL3729_PWM_REGISTER_COUNT; i += 13) {
#if IS31FL3729_I2C_PERSISTENCE > 0
for (uint8_t j = 0; j < IS31FL3729_I2C_PERSISTENCE; j++) {
if (i2c_write_register(i2c_addresses[index] << 1, IS31FL3729_REG_PWM + i, driver_buffers[index].pwm_buffer + i, 13, IS31FL3729_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
}
#else
i2c_write_register(i2c_addresses[index] << 1, IS31FL3729_REG_PWM + i, driver_buffers[index].pwm_buffer + i, 13, IS31FL3729_I2C_TIMEOUT);
#endif
}
}
void is31fl3729_init_drivers(void) {
i2c_init();
#if defined(IS31FL3729_SDB_PIN)
gpio_set_pin_output(IS31FL3729_SDB_PIN);
gpio_write_pin_high(IS31FL3729_SDB_PIN);
#endif
for (uint8_t i = 0; i < IS31FL3729_DRIVER_COUNT; i++) {
is31fl3729_init(i);
}
for (int i = 0; i < IS31FL3729_LED_COUNT; i++) {
is31fl3729_set_scaling_register(i, 0xFF, 0xFF, 0xFF);
}
for (uint8_t i = 0; i < IS31FL3729_DRIVER_COUNT; i++) {
is31fl3729_update_scaling_registers(i);
}
}
void is31fl3729_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.
is31fl3729_write_register(index, IS31FL3729_REG_PULLDOWNUP, ((IS31FL3729_SW_PULLDOWN & 0b111) << 4) | (IS31FL3729_CS_PULLUP & 0b111));
is31fl3729_write_register(index, IS31FL3729_REG_SPREAD_SPECTRUM, ((IS31FL3729_SPREAD_SPECTRUM & 0b1) << 4) | ((IS31FL3729_SPREAD_SPECTRUM_RANGE & 0b11) << 2) | (IS31FL3729_SPREAD_SPECTRUM_CYCLE_TIME & 0b11));
is31fl3729_write_register(index, IS31FL3729_REG_PWM_FREQUENCY, IS31FL3729_PWM_FREQUENCY);
is31fl3729_write_register(index, IS31FL3729_REG_GLOBAL_CURRENT, IS31FL3729_GLOBAL_CURRENT);
is31fl3729_write_register(index, 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 index) {
if (driver_buffers[index].pwm_buffer_dirty) {
is31fl3729_write_pwm_buffer(index);
driver_buffers[index].pwm_buffer_dirty = false;
}
}
void is31fl3729_update_scaling_registers(uint8_t index) {
if (driver_buffers[index].scaling_buffer_dirty) {
for (uint8_t i = 0; i < IS31FL3729_SCALING_REGISTER_COUNT; i++) {
is31fl3729_write_register(index, IS31FL3729_REG_SCALING + i, driver_buffers[index].scaling_buffer[i]);
}
driver_buffers[index].scaling_buffer_dirty = false;
}
}
void is31fl3729_flush(void) {
for (uint8_t i = 0; i < IS31FL3729_DRIVER_COUNT; i++) {
is31fl3729_update_pwm_buffers(i);
}
}
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