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

#include "lux.h"

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

#include <esp/spi.h>

const int signal_led_pin = 2;

const int cs0 = 15;
const int nint_pin = 4;
const int init_pin = 5;


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

void int_to_hex(uint8_t i, char buf[2]) {
    uint8_t hex_charset[] = "0123456789ABCDEF";
    buf[0] = hex_charset[i >> 4];
    buf[1] = hex_charset[i & 0x0F];
}

const gpio_inttype_t int_type = GPIO_INTTYPE_EDGE_NEG;

void gpio_intr_handler(uint8_t gpio_num)
{
    uint8_t buf[2];
    spi_read(1, 0x0000, buf, 2, SPI_8BIT);
    char hex[5] = {0};
    int_to_hex(buf[0], hex);
    int_to_hex(buf[1], hex + 2);
    hex[4] = '\0';
    printf("lux_task output: %s\n", hex);
}

extern "C" void lux_task(void *pvParameters) {

    gpio_enable(signal_led_pin, GPIO_OUTPUT);
    gpio_enable(cs0, GPIO_OUTPUT);
    gpio_enable(nint_pin, GPIO_INPUT);
    gpio_enable(init_pin, GPIO_OUTPUT);
    spi_init(1, SPI_MODE0, SPI_FREQ_DIV_1M, 1, SPI_BIG_ENDIAN, 1);

    gpio_set_interrupt(nint_pin, int_type, gpio_intr_handler);

    uint8_t charset[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

    uint8_t cnt = 0;

    while(1) {
        uint8_t out[2];
        out[1] = 0x0F;
        out[0] = charset[cnt++];
        spi_transfer_16(1, *(uint16_t*)out);


        vTaskDelay(2000/portTICK_PERIOD_MS);
        cnt %= sizeof(charset);
    }


    vTaskDelete(nullptr);
}