156 lines
5 KiB
C
156 lines
5 KiB
C
/* Copyright 2018 Jason Williams (Wilba)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "is31fl3218-mono.h"
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#include "i2c_master.h"
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#include "gpio.h"
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#define IS31FL3218_PWM_REGISTER_COUNT 18
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#define IS31FL3218_LED_CONTROL_REGISTER_COUNT 3
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#ifndef IS31FL3218_I2C_TIMEOUT
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# define IS31FL3218_I2C_TIMEOUT 100
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#endif
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#ifndef IS31FL3218_I2C_PERSISTENCE
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# define IS31FL3218_I2C_PERSISTENCE 0
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#endif
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typedef struct is31fl3218_driver_t {
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uint8_t pwm_buffer[IS31FL3218_PWM_REGISTER_COUNT];
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bool pwm_buffer_dirty;
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uint8_t led_control_buffer[IS31FL3218_LED_CONTROL_REGISTER_COUNT];
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bool led_control_buffer_dirty;
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} PACKED is31fl3218_driver_t;
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// IS31FL3218 has 18 PWM outputs and a fixed I2C address, so no chaining.
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is31fl3218_driver_t driver_buffers = {
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.pwm_buffer = {0},
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.pwm_buffer_dirty = false,
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.led_control_buffer = {0},
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.led_control_buffer_dirty = false,
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};
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void is31fl3218_write_register(uint8_t reg, uint8_t data) {
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#if IS31FL3218_I2C_PERSISTENCE > 0
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for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
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if (i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, reg, &data, 1, IS31FL3218_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
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}
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#else
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i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, reg, &data, 1, IS31FL3218_I2C_TIMEOUT);
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#endif
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}
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void is31fl3218_write_pwm_buffer(void) {
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#if IS31FL3218_I2C_PERSISTENCE > 0
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for (uint8_t i = 0; i < IS31FL3218_I2C_PERSISTENCE; i++) {
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if (i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, driver_buffers.pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
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}
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#else
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i2c_write_register(IS31FL3218_I2C_ADDRESS << 1, IS31FL3218_REG_PWM, driver_buffers.pwm_buffer, 18, IS31FL3218_I2C_TIMEOUT);
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#endif
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}
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void is31fl3218_init(void) {
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i2c_init();
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#if defined(IS31FL3218_SDB_PIN)
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gpio_set_pin_output(IS31FL3218_SDB_PIN);
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gpio_write_pin_high(IS31FL3218_SDB_PIN);
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#endif
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// In case we ever want to reinitialize (?)
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is31fl3218_write_register(IS31FL3218_REG_RESET, 0x00);
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// Turn off software shutdown
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is31fl3218_write_register(IS31FL3218_REG_SHUTDOWN, 0x01);
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// Set all PWM values to zero
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for (uint8_t i = 0; i < IS31FL3218_PWM_REGISTER_COUNT; i++) {
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is31fl3218_write_register(IS31FL3218_REG_PWM + i, 0x00);
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}
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// turn off all LEDs in the LED control register
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for (uint8_t i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) {
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is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, 0x00);
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}
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// Load PWM registers and LED Control register data
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is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);
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for (int i = 0; i < IS31FL3218_LED_COUNT; i++) {
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is31fl3218_set_led_control_register(i, true);
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}
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is31fl3218_update_led_control_registers();
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}
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void is31fl3218_set_value(int index, uint8_t value) {
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is31fl3218_led_t led;
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if (index >= 0 && index < IS31FL3218_LED_COUNT) {
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memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));
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if (driver_buffers.pwm_buffer[led.v] == value) {
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return;
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}
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driver_buffers.pwm_buffer[led.v] = value;
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driver_buffers.pwm_buffer_dirty = true;
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}
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}
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void is31fl3218_set_value_all(uint8_t value) {
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for (int i = 0; i < IS31FL3218_LED_COUNT; i++) {
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is31fl3218_set_value(i, value);
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}
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}
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void is31fl3218_set_led_control_register(uint8_t index, bool value) {
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is31fl3218_led_t led;
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memcpy_P(&led, (&g_is31fl3218_leds[index]), sizeof(led));
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uint8_t control_register = led.v / 6;
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uint8_t bit_value = led.v % 6;
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if (value) {
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driver_buffers.led_control_buffer[control_register] |= (1 << bit_value);
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} else {
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driver_buffers.led_control_buffer[control_register] &= ~(1 << bit_value);
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}
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driver_buffers.led_control_buffer_dirty = true;
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}
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void is31fl3218_update_pwm_buffers(void) {
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if (driver_buffers.pwm_buffer_dirty) {
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is31fl3218_write_pwm_buffer();
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// Load PWM registers and LED Control register data
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is31fl3218_write_register(IS31FL3218_REG_UPDATE, 0x01);
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driver_buffers.pwm_buffer_dirty = false;
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}
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}
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void is31fl3218_update_led_control_registers(void) {
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if (driver_buffers.led_control_buffer_dirty) {
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for (uint8_t i = 0; i < IS31FL3218_LED_CONTROL_REGISTER_COUNT; i++) {
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is31fl3218_write_register(IS31FL3218_REG_LED_CONTROL_1 + i, driver_buffers.led_control_buffer[i]);
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}
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driver_buffers.led_control_buffer_dirty = false;
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}
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}
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