223 lines
7.3 KiB
C
223 lines
7.3 KiB
C
/* Copyright 2017 Jason Williams
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* Copyright 2018 Jack Humbert
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* Copyright 2018 Yiancar
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* Copyright 2020 MelGeek
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* Copyright 2021 MasterSpoon
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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 "is31fl3746a-mono.h"
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#include "i2c_master.h"
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#include "gpio.h"
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#include "wait.h"
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#define IS31FL3746A_PWM_REGISTER_COUNT 72
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#define IS31FL3746A_SCALING_REGISTER_COUNT 72
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#ifndef IS31FL3746A_I2C_TIMEOUT
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# define IS31FL3746A_I2C_TIMEOUT 100
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#endif
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#ifndef IS31FL3746A_I2C_PERSISTENCE
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# define IS31FL3746A_I2C_PERSISTENCE 0
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#endif
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#ifndef IS31FL3746A_CONFIGURATION
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# define IS31FL3746A_CONFIGURATION 0x01
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#endif
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#ifndef IS31FL3746A_PWM_FREQUENCY
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# define IS31FL3746A_PWM_FREQUENCY IS31FL3746A_PWM_FREQUENCY_29K_HZ
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#endif
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#ifndef IS31FL3746A_SW_PULLDOWN
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# define IS31FL3746A_SW_PULLDOWN IS31FL3746A_PDR_2K_OHM_SW_OFF
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#endif
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#ifndef IS31FL3746A_CS_PULLUP
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# define IS31FL3746A_CS_PULLUP IS31FL3746A_PUR_2K_OHM_CS_OFF
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#endif
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#ifndef IS31FL3746A_GLOBAL_CURRENT
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# define IS31FL3746A_GLOBAL_CURRENT 0xFF
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#endif
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const uint8_t i2c_addresses[IS31FL3746A_DRIVER_COUNT] = {
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IS31FL3746A_I2C_ADDRESS_1,
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#ifdef IS31FL3746A_I2C_ADDRESS_2
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IS31FL3746A_I2C_ADDRESS_2,
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# ifdef IS31FL3746A_I2C_ADDRESS_3
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IS31FL3746A_I2C_ADDRESS_3,
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# ifdef IS31FL3746A_I2C_ADDRESS_4
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IS31FL3746A_I2C_ADDRESS_4,
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# endif
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# endif
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#endif
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};
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typedef struct is31fl3746a_driver_t {
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uint8_t pwm_buffer[IS31FL3746A_PWM_REGISTER_COUNT];
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bool pwm_buffer_dirty;
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uint8_t scaling_buffer[IS31FL3746A_SCALING_REGISTER_COUNT];
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bool scaling_buffer_dirty;
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} PACKED is31fl3746a_driver_t;
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is31fl3746a_driver_t driver_buffers[IS31FL3746A_DRIVER_COUNT] = {{
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.pwm_buffer = {0},
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.pwm_buffer_dirty = false,
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.scaling_buffer = {0},
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.scaling_buffer_dirty = false,
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}};
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void is31fl3746a_write_register(uint8_t index, uint8_t reg, uint8_t data) {
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#if IS31FL3746A_I2C_PERSISTENCE > 0
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for (uint8_t i = 0; i < IS31FL3746A_I2C_PERSISTENCE; i++) {
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if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
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}
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#else
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i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3746A_I2C_TIMEOUT);
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#endif
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}
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void is31fl3746a_select_page(uint8_t index, uint8_t page) {
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is31fl3746a_write_register(index, IS31FL3746A_REG_COMMAND_WRITE_LOCK, IS31FL3746A_COMMAND_WRITE_LOCK_MAGIC);
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is31fl3746a_write_register(index, IS31FL3746A_REG_COMMAND, page);
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}
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void is31fl3746a_write_pwm_buffer(uint8_t index) {
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// Assumes page 0 is already selected.
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// Transmit PWM registers in 4 transfers of 18 bytes.
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// Iterate over the pwm_buffer contents at 18 byte intervals.
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for (uint8_t i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i += 18) {
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#if IS31FL3746A_I2C_PERSISTENCE > 0
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for (uint8_t j = 0; j < IS31FL3746A_I2C_PERSISTENCE; j++) {
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if (i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3746A_I2C_TIMEOUT) == I2C_STATUS_SUCCESS) break;
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}
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#else
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i2c_write_register(i2c_addresses[index] << 1, i + 1, driver_buffers[index].pwm_buffer + i, 18, IS31FL3746A_I2C_TIMEOUT);
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#endif
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}
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}
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void is31fl3746a_init_drivers(void) {
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i2c_init();
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#if defined(IS31FL3746A_SDB_PIN)
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gpio_set_pin_output(IS31FL3746A_SDB_PIN);
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gpio_write_pin_high(IS31FL3746A_SDB_PIN);
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#endif
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for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
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is31fl3746a_init(i);
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}
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for (int i = 0; i < IS31FL3746A_LED_COUNT; i++) {
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is31fl3746a_set_scaling_register(i, 0xFF);
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}
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for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
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is31fl3746a_update_scaling_registers(i);
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}
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}
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void is31fl3746a_init(uint8_t index) {
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// In order to avoid the LEDs being driven with garbage data
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// in the LED driver's PWM registers, shutdown is enabled last.
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// Set up the mode and other settings, clear the PWM registers,
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// then disable software shutdown.
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is31fl3746a_select_page(index, IS31FL3746A_COMMAND_SCALING);
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// Turn off all LEDs.
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for (uint8_t i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
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is31fl3746a_write_register(index, i + 1, 0x00);
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}
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is31fl3746a_select_page(index, IS31FL3746A_COMMAND_PWM);
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for (uint8_t i = 0; i < IS31FL3746A_PWM_REGISTER_COUNT; i++) {
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is31fl3746a_write_register(index, i + 1, 0x00);
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}
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is31fl3746a_select_page(index, IS31FL3746A_COMMAND_FUNCTION);
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is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PULLDOWNUP, (IS31FL3746A_SW_PULLDOWN << 4) | IS31FL3746A_CS_PULLUP);
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is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_GLOBAL_CURRENT, IS31FL3746A_GLOBAL_CURRENT);
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is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PWM_ENABLE, 0x01);
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is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_PWM_FREQUENCY, IS31FL3746A_PWM_FREQUENCY);
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is31fl3746a_write_register(index, IS31FL3746A_FUNCTION_REG_CONFIGURATION, IS31FL3746A_CONFIGURATION);
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// Wait 10ms to ensure the device has woken up.
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wait_ms(10);
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}
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void is31fl3746a_set_value(int index, uint8_t value) {
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is31fl3746a_led_t led;
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if (index >= 0 && index < IS31FL3746A_LED_COUNT) {
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memcpy_P(&led, (&g_is31fl3746a_leds[index]), sizeof(led));
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if (driver_buffers[led.driver].pwm_buffer[led.v] == value) {
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return;
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}
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driver_buffers[led.driver].pwm_buffer[led.v] = value;
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driver_buffers[led.driver].pwm_buffer_dirty = true;
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}
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}
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void is31fl3746a_set_value_all(uint8_t value) {
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for (int i = 0; i < IS31FL3746A_LED_COUNT; i++) {
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is31fl3746a_set_value(i, value);
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}
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}
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void is31fl3746a_set_scaling_register(uint8_t index, uint8_t value) {
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is31fl3746a_led_t led;
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memcpy_P(&led, (&g_is31fl3746a_leds[index]), sizeof(led));
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driver_buffers[led.driver].scaling_buffer[led.v] = value;
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driver_buffers[led.driver].scaling_buffer_dirty = true;
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}
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void is31fl3746a_update_pwm_buffers(uint8_t index) {
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if (driver_buffers[index].pwm_buffer_dirty) {
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is31fl3746a_select_page(index, IS31FL3746A_COMMAND_PWM);
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is31fl3746a_write_pwm_buffer(index);
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driver_buffers[index].pwm_buffer_dirty = false;
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}
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}
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void is31fl3746a_update_scaling_registers(uint8_t index) {
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if (driver_buffers[index].scaling_buffer_dirty) {
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is31fl3746a_select_page(index, IS31FL3746A_COMMAND_SCALING);
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for (uint8_t i = 0; i < IS31FL3746A_SCALING_REGISTER_COUNT; i++) {
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is31fl3746a_write_register(index, i + 1, driver_buffers[index].scaling_buffer[i]);
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}
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driver_buffers[index].scaling_buffer_dirty = false;
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}
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}
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void is31fl3746a_flush(void) {
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for (uint8_t i = 0; i < IS31FL3746A_DRIVER_COUNT; i++) {
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is31fl3746a_update_pwm_buffers(i);
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}
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}
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