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extern "C" void spi_task(void *pvParameters)
{      
    spi_transaction_t t;
    esp_err_t ret;
    int16_t k = 0;
    uint16_t sendbuf[64] = {0};
    uint16_t recvbuf[64] = {0};
    uint16_t valorreal;
    uint16_t aux2 = 0;
    long start = 0;
    long stop = 0;
    memset(recvbuf, 122, 128);
    memset(&t, 0, sizeof(t));
    t.length= sizeof(sendbuf)*8;
    t.rxlength = sizeof(recvbuf)*8;
    t.rx_buffer=recvbuf;
    t.tx_buffer = NULL;
    gpio_set_level(GPIO_ERROR,1); // Sincronizar na inicialização o envio do FPGA
    uint16_t aux;
    printf("spi_task rodando no core: ");
    printf("%u\n",xPortGetCoreID());
    while(1) 
    {
        memset(recvbuf, 122, 128);
        xSemaphoreTake(rdySem, portMAX_DELAY); //Wait until slave is ready
        ret=spi_device_transmit(handle, &t);
        transf++;
        start = xTaskGetTickCount();
        for(int i = 0; i<64; i++ )
        {
            aux = recvbuf[i]; // Inserindo dados recebidos na fila
            xQueueSend(xQueue, &aux, portMAX_DELAY);
        }
        stop  = ((xTaskGetTickCount()-start)*portTICK_PERIOD_MS);
    }
}

Code: Select all

spi_bus_config_t buscfg={
        .mosi_io_num=GPIO_MOSI,
        .miso_io_num=GPIO_MISO,
        .sclk_io_num=GPIO_SCLK,
        .quadwp_io_num=-1,
        .quadhd_io_num=-1
    };

    spi_device_interface_config_t devcfg={
        .command_bits=0,
        .address_bits=0,
        .dummy_bits=0,
        .mode=0,
        .duty_cycle_pos=128, 
        .cs_ena_pretrans=10,
        .cs_ena_posttrans=10, //Keep the CS low 3 cycles after transaction, to stop slave from missing the last bit when CS has less propagation delay than CLK
        .clock_speed_hz=5000000,
        .input_delay_ns=10,
        .spics_io_num=GPIO_CS,    
        .flags = SPI_DEVICE_NO_DUMMY,
        .queue_size=1
    };

    //Configuration for the handshake line
    gpio_config_t io_conf={
        .pin_bit_mask=(1<<GPIO_HANDSHAKE),
        .mode=GPIO_MODE_INPUT,
        .pull_up_en= GPIO_PULLUP_ENABLE,
        .intr_type=GPIO_INTR_POSEDGE,
    };

Code: Select all

#define GPIO_MOSI (gpio_num_t)12
#define GPIO_MISO (gpio_num_t)13
#define GPIO_SCLK (gpio_num_t)15
#define GPIO_CS (gpio_num_t)14

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xQueueReceive(xQueue, &queuerecv, portMAX_DELAY);
                    queuerecv = ((queuerecv << 8) | (queuerecv >> 8));
                    buffercirc(queuerecv);
                    if(queuerecv != 33)
                    {
                        printf("It's wrong. \n");
                    }