#include <stdio.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/spi_master.h"
#include "esp_log.h"

static const char *TAG = "QSPI_DATA";

#define HOST_ID SPI2_HOST

// Pins anpassen
#define PIN_NUM_IO0  8
#define PIN_NUM_IO1  11
#define PIN_NUM_IO2  13
#define PIN_NUM_IO3  9
#define PIN_NUM_CLK  12
#define PIN_NUM_CS   10

void app_main(void)
{
    spi_bus_config_t buscfg = {
        .mosi_io_num = 11,   // dein MOSI Pin
        .miso_io_num = -1,   // kein MISO
        .sclk_io_num = 12,   // dein CLK Pin
        .quadwp_io_num = -1,
        .quadhd_io_num = -1,
    };

    spi_device_interface_config_t devcfg = {
        .clock_speed_hz = 10 * 1000 * 1000, // 10 MHz
        .mode = 0,
        .spics_io_num = 10,                 // dein CS Pin
        .queue_size = 1,
    };

    spi_device_handle_t spi;
    ESP_ERROR_CHECK(spi_bus_initialize(SPI2_HOST, &buscfg, SPI_DMA_CH_AUTO));
    ESP_ERROR_CHECK(spi_bus_add_device(SPI2_HOST, &devcfg, &spi));

    uint8_t data[] = { 0xDE, 0xAD, 0xBE, 0xEF };

    spi_transaction_t t = {
        .length = sizeof(data) * 8, // Länge in Bits!
        .tx_buffer = data,
        .rx_buffer = NULL,          // MUSS NULL bleiben
    };

    ESP_ERROR_CHECK(spi_device_transmit(spi, &t));
}