fiatlux/firmware/lux.cpp

//
// Created by jedi on 25.06.21.
//

#include "lux.h"

#include <string.h>
#include <FreeRTOS.h>
#include <task.h>

#include <esp/spi.h>
#include <ws2812_i2s/ws2812_i2s.h>

const int signal_led_pin = 2;

const int cs0 = 15;
const int gpio4 = 4;
const int gpio5 = 5;


ws2812_pixel_t **pixels_ptr;

static ws2812_pixel_t next_colour(int i) {
    ws2812_pixel_t colour = {{0, 0, 0, 0}};
    if(i == 8) {
        colour.white = 32;
    } else {
        colour.red = i & 1 ? 32 : 0;
        colour.green = i & 2 ? 32 : 0;
        colour.blue = i & 4 ? 32 : 0;
    }

    return colour;
}

void spi_dac(int id, int val) {
    int dac_val = (val << 2) & 0x3FFC;

    spi_transfer_8(1, ~(0x00));
    gpio_write(cs0, 1);
    gpio_write(cs0, 0);
    spi_transfer_8(1, ~(0x01 << id));
    gpio_write(cs0, 1);
    gpio_write(cs0, 0);

    spi_transfer_16(1, dac_val);

    spi_transfer_8(1, ~(0x00));
    gpio_write(cs0, 1);
    gpio_write(cs0, 0);
    spi_transfer_8(1, ~(0x01 << id));
    gpio_write(cs0, 1);
    gpio_write(cs0, 0);
}

extern "C" void signal_led(bool state) {
    gpio_write(signal_led_pin, !state);
}


/* This task uses the high level GPIO API (esp_gpio.h) to blink an LED.
 *
 */
extern "C" void lux_task(void *pvParameters) {

    gpio_enable(9, GPIO_INPUT);
    gpio_enable(10, GPIO_INPUT);

    ws2812_pixel_t pixels[led_number];
    ws2812_i2s_init(led_number, PIXEL_RGBW);
    memset(pixels, 0, sizeof(ws2812_pixel_t) * led_number);

    gpio_enable(signal_led_pin, GPIO_OUTPUT);
    gpio_enable(cs0, GPIO_OUTPUT);
    gpio_enable(gpio4, GPIO_OUTPUT);
    gpio_enable(gpio5, GPIO_OUTPUT);
    spi_init(1, SPI_MODE0, SPI_FREQ_DIV_1M, 1, SPI_BIG_ENDIAN, 1);
    while (1) {
        gpio_write(gpio4, 1);
        vTaskDelay(200 / portTICK_PERIOD_MS);
        gpio_write(gpio4, 0);
        /*for (int j = 0; j < 64; j++) {
            for (int i = 0; i < 8; i++)
                spi_dac(i, 64 * j);
            //printf("> %d\n", 64*j);
            vTaskDelay(100 / portTICK_PERIOD_MS);
        }*/
        for (int i = 0; i < 8; i++)
            spi_dac(i, 0);

        gpio_write(gpio5, 1);
        vTaskDelay(200 / portTICK_PERIOD_MS);
        gpio_write(gpio5, 0);

        for (int c = 8; c >= 0; c--) {

            for (int i = 0; i < led_number; i++) {
                pixels[i] = next_colour(c);
            }
            ws2812_i2s_update(pixels, PIXEL_RGBW);
            vTaskDelay(200 / portTICK_PERIOD_MS);
        }

    }
}