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/* Copyright 2018 Jason Williams (Wilba)
*
* 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 "is31fl3218-mono.h"
#include "i2c_master.h"
#include "gpio.h"
#define IS31FL3218_PWM_REGISTER_COUNT 18
#define IS31FL3218_LED_CONTROL_REGISTER_COUNT 3
#ifndef IS31FL3218_I2C_TIMEOUT
# define IS31FL3218_I2C_TIMEOUT 100
#endif
#ifndef IS31FL3218_I2C_PERSISTENCE
# define IS31FL3218_I2C_PERSISTENCE 0
#endif
typedef struct is31fl3218_driver_t {
uint8_t pwm_buffer[IS31FL3218_PWM_REGISTER_COUNT];
bool pwm_buffer_dirty;
uint8_t led_control_buffer[IS31FL3218_LED_CONTROL_REGISTER_COUNT];
bool led_control_buffer_dirty;
} PACKED is31fl3218_driver_t;
// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
is31fl3218_driver_t driver_buffers = {
.pwm_buffer = {0},
.pwm_buffer_dirty = false,
.led_control_buffer = {0},
.led_control_buffer_dirty = false,
};
void is31fl3218_write_register(uint8_t reg, uint8_t data) {
#if IS31FL3218_I2C_PERSISTENCE > 0
for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
if (i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, reg, &data, 1, IS31FL3218_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
}
#else
i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, reg, &data, 1, IS31FL3218_I2C_TIMEOUT);
#endif
}
void is31fl3218_write_pwm_buffer(void) {
#if IS31FL3218_I2C_PERSISTENCE > 0
for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
if (i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, driver_buffers.pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
}
#else
i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, driver_buffers.pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT);
#endif
}
void is31fl3218_init(void) {
i2c_init();
#if defined(IS31FL3218_SDB_PIN)
gpio_set_pin_output(IS31FL3218_SDB_PIN);
gpio_write_pin_high(IS31FL3218_SDB_PIN);
#endif
// In case we ever want to reinitialize (?)
is31fl3218_write_register(IS31FL3218_REG_RESET, 0x00);
// Turn off software shutdown
is31fl3218_write_register(IS31FL3218_REG_SHUTDOWN, 0x01);
// Set all PWM values to zero
for (uint8_t i = 0; i < IS31FL3218_PWM_REGISTER_COUNT; i++) {
is31fl3218_write_register(IS31FL3218_REG_PWM + i, 0x00);
}
// turn off all LEDs in the LED control register
for (uint8_t i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) {
is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, 0x00);
}
// Load PWM registers and LED Control register data
is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);
for (int i = 0; i < IS31FL3218_LED_COUNT; i++) {
is31fl3218_set_led_control_register(i, true);
}
is31fl3218_update_led_control_registers();
}
void is31fl3218_set_value(int index, uint8_t value) {
is31fl3218_led_t led;
if (index >= 0 && index < IS31FL3218_LED_COUNT) {
memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));
if (driver_buffers.pwm_buffer[led.v] == value) {
return;
}
driver_buffers.pwm_buffer[led.v] = value;
driver_buffers.pwm_buffer_dirty = true;
}
}
void is31fl3218_set_value_all(uint8_t value) {
for (int i = 0; i < IS31FL3218_LED_COUNT; i++) {
is31fl3218_set_value(i, value);
}
}
void is31fl3218_set_led_control_register(uint8_t index, bool value) {
is31fl3218_led_t led;
memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));
uint8_t control_register = led.v / 6;
uint8_t bit_value = led.v % 6;
if (value) {
driver_buffers.led_control_buffer[control_register] |= (1 << bit_value);
} else {
driver_buffers.led_control_buffer[control_register] &= ~(1 << bit_value);
}
driver_buffers.led_control_buffer_dirty = true;
}
void is31fl3218_update_pwm_buffers(void) {
if (driver_buffers.pwm_buffer_dirty) {
is31fl3218_write_pwm_buffer();
// Load PWM registers and LED Control register data
is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);
driver_buffers.pwm_buffer_dirty = false;
}
}
void is31fl3218_update_led_control_registers(void) {
if (driver_buffers.led_control_buffer_dirty) {
for (uint8_t i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) {
is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, driver_buffers.led_control_buffer[i]);
}
driver_buffers.led_control_buffer_dirty = false;
}
}
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