245 lines
8.8 KiB
C
245 lines
8.8 KiB
C
/* Copyright 2017 Jason Williams
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* Copyright 2018 Jack Humbert
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* Copyright 2021 Doni Crosby
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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 "is31fl3731.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 IS31FL3731_PWM_REGISTER_COUNT 144
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#define IS31FL3731_LED_CONTROL_REGISTER_COUNT 18
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#ifndef IS31FL3731_I2C_TIMEOUT
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# define IS31FL3731_I2C_TIMEOUT 100
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#endif
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#ifndef IS31FL3731_I2C_PERSISTENCE
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# define IS31FL3731_I2C_PERSISTENCE 0
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#endif
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const uint8_t i2c_addresses[IS31FL3731_DRIVER_COUNT] = {
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IS31FL3731_I2C_ADDRESS_1,
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#ifdef IS31FL3731_I2C_ADDRESS_2
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IS31FL3731_I2C_ADDRESS_2,
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# ifdef IS31FL3731_I2C_ADDRESS_3
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IS31FL3731_I2C_ADDRESS_3,
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# ifdef IS31FL3731_I2C_ADDRESS_4
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IS31FL3731_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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// These buffers match the IS31FL3731 PWM registers 0x24-0xB3.
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// Storing them like this is optimal for I2C transfers to the registers.
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// We could optimize this and take out the unused registers from these
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// buffers and the transfers in is31fl3731_write_pwm_buffer() but it's
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// probably not worth the extra complexity.
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typedef struct is31fl3731_driver_t {
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uint8_t pwm_buffer[IS31FL3731_PWM_REGISTER_COUNT];
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bool pwm_buffer_dirty;
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uint8_t led_control_buffer[IS31FL3731_LED_CONTROL_REGISTER_COUNT];
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bool led_control_buffer_dirty;
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} PACKED is31fl3731_driver_t;
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is31fl3731_driver_t driver_buffers[IS31FL3731_DRIVER_COUNT] = {{
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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 is31fl3731_write_register(uint8_t index, uint8_t reg, uint8_t data) {
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#if IS31FL3731_I2C_PERSISTENCE > 0
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for (uint8_t i = 0; i < IS31FL3731_I2C_PERSISTENCE; i++) {
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if (i2c_write_register(i2c_addresses[index] << 1, reg, &data, 1, IS31FL3731_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, IS31FL3731_I2C_TIMEOUT);
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#endif
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}
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void is31fl3731_select_page(uint8_t index, uint8_t page) {
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is31fl3731_write_register(index, IS31FL3731_REG_COMMAND, page);
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}
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void is31fl3731_write_pwm_buffer(uint8_t index) {
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// Assumes page 0 is already selected.
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// Transmit PWM registers in 9 transfers of 16 bytes.
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// Iterate over the pwm_buffer contents at 16 byte intervals.
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for (uint8_t i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i += 16) {
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#if IS31FL3731_I2C_PERSISTENCE > 0
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for (uint8_t j = 0; j < IS31FL3731_I2C_PERSISTENCE; j++) {
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if (i2c_write_register(i2c_addresses[index] << 1, IS31FL3731_FRAME_REG_PWM + i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3731_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, IS31FL3731_FRAME_REG_PWM + i, driver_buffers[index].pwm_buffer + i, 16, IS31FL3731_I2C_TIMEOUT);
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#endif
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}
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}
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void is31fl3731_init_drivers(void) {
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i2c_init();
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#if defined(IS31FL3731_SDB_PIN)
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gpio_set_pin_output(IS31FL3731_SDB_PIN);
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gpio_write_pin_high(IS31FL3731_SDB_PIN);
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#endif
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for (uint8_t i = 0; i < IS31FL3731_DRIVER_COUNT; i++) {
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is31fl3731_init(i);
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}
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for (int i = 0; i < IS31FL3731_LED_COUNT; i++) {
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is31fl3731_set_led_control_register(i, true, true, true);
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}
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for (uint8_t i = 0; i < IS31FL3731_DRIVER_COUNT; i++) {
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is31fl3731_update_led_control_registers(i);
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}
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}
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void is31fl3731_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, first enable software shutdown,
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// then set up the mode and other settings, clear the PWM registers,
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// then disable software shutdown.
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is31fl3731_select_page(index, IS31FL3731_COMMAND_FUNCTION);
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// enable software shutdown
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is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x00);
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#ifdef IS31FL3731_DEGHOST // set to enable de-ghosting of the array
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is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_GHOST_IMAGE_PREVENTION, IS31FL3731_GHOST_IMAGE_PREVENTION_GEN);
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#endif
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// this delay was copied from other drivers, might not be needed
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wait_ms(10);
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// picture mode
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is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_CONFIG, IS31FL3731_CONFIG_MODE_PICTURE);
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// display frame 0
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is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_PICTURE_DISPLAY, 0x00);
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// audio sync off
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is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_AUDIO_SYNC, 0x00);
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is31fl3731_select_page(index, IS31FL3731_COMMAND_FRAME_1);
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// turn off all LEDs in the LED control register
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for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
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is31fl3731_write_register(index, IS31FL3731_FRAME_REG_LED_CONTROL + i, 0x00);
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}
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// turn off all LEDs in the blink control register (not really needed)
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for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
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is31fl3731_write_register(index, IS31FL3731_FRAME_REG_BLINK_CONTROL + i, 0x00);
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}
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// set PWM on all LEDs to 0
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for (uint8_t i = 0; i < IS31FL3731_PWM_REGISTER_COUNT; i++) {
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is31fl3731_write_register(index, IS31FL3731_FRAME_REG_PWM + i, 0x00);
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}
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is31fl3731_select_page(index, IS31FL3731_COMMAND_FUNCTION);
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// disable software shutdown
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is31fl3731_write_register(index, IS31FL3731_FUNCTION_REG_SHUTDOWN, 0x01);
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// select page 0 and leave it selected.
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// most usage after initialization is just writing PWM buffers in page 0
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// as there's not much point in double-buffering
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is31fl3731_select_page(index, IS31FL3731_COMMAND_FRAME_1);
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}
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void is31fl3731_set_color(int index, uint8_t red, uint8_t green, uint8_t blue) {
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is31fl3731_led_t led;
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if (index >= 0 && index < IS31FL3731_LED_COUNT) {
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memcpy_P(&led, (&g_is31fl3731_leds[index]), sizeof(led));
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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) {
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return;
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}
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driver_buffers[led.driver].pwm_buffer[led.r] = red;
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driver_buffers[led.driver].pwm_buffer[led.g] = green;
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driver_buffers[led.driver].pwm_buffer[led.b] = blue;
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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 is31fl3731_set_color_all(uint8_t red, uint8_t green, uint8_t blue) {
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for (int i = 0; i < IS31FL3731_LED_COUNT; i++) {
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is31fl3731_set_color(i, red, green, blue);
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}
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}
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void is31fl3731_set_led_control_register(uint8_t index, bool red, bool green, bool blue) {
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is31fl3731_led_t led;
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memcpy_P(&led, (&g_is31fl3731_leds[index]), sizeof(led));
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uint8_t control_register_r = led.r / 8;
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uint8_t control_register_g = led.g / 8;
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uint8_t control_register_b = led.b / 8;
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uint8_t bit_r = led.r % 8;
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uint8_t bit_g = led.g % 8;
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uint8_t bit_b = led.b % 8;
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if (red) {
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driver_buffers[led.driver].led_control_buffer[control_register_r] |= (1 << bit_r);
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} else {
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driver_buffers[led.driver].led_control_buffer[control_register_r] &= ~(1 << bit_r);
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}
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if (green) {
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driver_buffers[led.driver].led_control_buffer[control_register_g] |= (1 << bit_g);
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} else {
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driver_buffers[led.driver].led_control_buffer[control_register_g] &= ~(1 << bit_g);
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}
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if (blue) {
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driver_buffers[led.driver].led_control_buffer[control_register_b] |= (1 << bit_b);
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} else {
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driver_buffers[led.driver].led_control_buffer[control_register_b] &= ~(1 << bit_b);
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}
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driver_buffers[led.driver].led_control_buffer_dirty = true;
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}
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void is31fl3731_update_pwm_buffers(uint8_t index) {
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if (driver_buffers[index].pwm_buffer_dirty) {
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is31fl3731_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 is31fl3731_update_led_control_registers(uint8_t index) {
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if (driver_buffers[index].led_control_buffer_dirty) {
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for (uint8_t i = 0; i < IS31FL3731_LED_CONTROL_REGISTER_COUNT; i++) {
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is31fl3731_write_register(index, i, driver_buffers[index].led_control_buffer[i]);
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}
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driver_buffers[index].led_control_buffer_dirty = false;
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}
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}
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void is31fl3731_flush(void) {
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for (uint8_t i = 0; i < IS31FL3731_DRIVER_COUNT; i++) {
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is31fl3731_update_pwm_buffers(i);
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}
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}
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