#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/spi.h"
#include "hardware/dma.h"
#include "hardware/pio.h"
#include "hardware/timer.h"

// SPI Defines
// We are going to use SPI 0, and allocate it to the following GPIO pins
// Pins can be changed, see the GPIO function select table in the datasheet for information on GPIO assignments
#define SPI_PORT spi0
#define PIN_MISO 16
#define PIN_CS   17
#define PIN_SCK  18
#define PIN_MOSI 19

int64_t alarm_callback(alarm_id_t id, void *user_data) {
    // Put your timeout handler code in here
    return 0;
}



int main()
{
    stdio_init_all();

    // SPI initialisation. This example will use SPI at 1MHz.
    spi_init(SPI_PORT, 1000*1000);
    gpio_set_function(PIN_MISO, GPIO_FUNC_SPI);
    gpio_set_function(PIN_CS,   GPIO_FUNC_SIO);
    gpio_set_function(PIN_SCK,  GPIO_FUNC_SPI);
    gpio_set_function(PIN_MOSI, GPIO_FUNC_SPI);
    
    // Chip select is active-low, so we'll initialise it to a driven-high state
    gpio_set_dir(PIN_CS, GPIO_OUT);
    gpio_put(PIN_CS, 1);
    



    // Timer example code - This example fires off the callback after 2000ms
    add_alarm_in_ms(2000, alarm_callback, NULL, false);

    puts("Hello, world!");

    return 0;
}