/*
 * SPDX-FileCopyrightText: 2010-2022 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: CC0-1.0
 */

#include <stdio.h>
#include <inttypes.h>
#include "sdkconfig.h"

#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "freertos/queue.h"

#include "esp_chip_info.h"
#include "esp_flash.h"
#include "esp_system.h"

#include "driver/gpio.h"
#include "driver/spi_master.h"

#include "mcp2125.hpp"

#define SPI_PIN_CS0 GPIO_NUM_5
#define SPI_PIN_SCLK GPIO_NUM_18
#define SPI_PIN_MISO GPIO_NUM_19
#define SPI_PIN_MOSI GPIO_NUM_23

#define EXTERNAL_TRIGGER GPIO_NUM_26

#ifdef __cplusplus
extern "C" {
#endif

void app_main() {
    printf("Hello world!\n");

    const gpio_num_t LED_PIN = GPIO_NUM_2;
    gpio_set_direction(LED_PIN, GPIO_MODE_OUTPUT);

    gpio_set_direction(EXTERNAL_TRIGGER, GPIO_MODE_OUTPUT);
    gpio_set_level(EXTERNAL_TRIGGER, true);

    spi_bus_config_t spi_config = {
        .mosi_io_num = SPI_PIN_MOSI,
        .miso_io_num = SPI_PIN_MISO,
        .sclk_io_num = SPI_PIN_SCLK,
        
        .quadwp_io_num = -1,
        .quadhd_io_num = -1,

        .flags = SPICOMMON_BUSFLAG_MASTER
    };

    spi_device_interface_config_t mp2125_devcfg = {
        .command_bits = 8,
        .address_bits = 0,
        .dummy_bits = 0,

        .mode = 0,
        .duty_cycle_pos = 128,
        .cs_ena_pretrans = 1,
        .cs_ena_posttrans = 1,
        .clock_speed_hz = 10000,

        .spics_io_num = SPI_PIN_CS0,
        .flags = SPI_DEVICE_HALFDUPLEX,
        .queue_size = 5,
    };

    spi_device_handle_t mp2125_handle;

    spi_bus_initialize(VSPI_HOST, &spi_config, SPI_DMA_CH_AUTO);
    spi_bus_add_device(VSPI_HOST, &mp2125_devcfg, &mp2125_handle);

    char rxBuffer[32] = {0};

    spi_transaction_t transaction0 = { // RESET
        .cmd = 0b11000000,
        .length = 0,
        .rxlength = 2 * 8,
        .tx_buffer = NULL,
        .rx_buffer = rxBuffer
    };

    spi_transaction_t transaction1 = { // READ STAT/S
        .cmd = 0b10110000,
        .length = 0,
        .rxlength = 2 * 8,
        .tx_buffer = NULL,
        .rx_buffer = rxBuffer
    };


    vTaskDelay(100 / portTICK_PERIOD_MS);
    gpio_set_level(EXTERNAL_TRIGGER, false);
    spi_device_transmit(mp2125_handle, &transaction0);
    spi_device_transmit(mp2125_handle, &transaction1);
    gpio_set_level(EXTERNAL_TRIGGER, true);

    bool flag = true;
    while (true) {
        gpio_set_level(LED_PIN, flag);
        flag = dummy_function(flag);

        vTaskDelay(100 / portTICK_PERIOD_MS);
    }    
}

#ifdef __cplusplus
}
#endif