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Code: Untitled.c Select all

#include "freertos/FreeRTOS.h"

#include "freertos/task.h"

#include "esp_system.h"

#include "esp_log.h"

#include "driver/uart.h"

#include "string.h"

#include "driver/gpio.h"



static const int RX_BUF_SIZE = 128;



#define TXD_PIN (GPIO_NUM_4)

#define RXD_PIN (GPIO_NUM_5)

#define UART_TOUT_THRESH_DEFAULT (1)



void init(void)

{

    const uart_config_t uart_config = {

        .baud_rate = 100,

        .data_bits = UART_DATA_8_BITS,

        .parity = UART_PARITY_DISABLE,

        .stop_bits = UART_STOP_BITS_1,

        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,

        .source_clk = UART_SCLK_APB,

    };

    const uart_intr_config_t uart_intr = {

        // .intr_enable_mask = UART_RXFIFO_TOUT_INT_ENA_M,

        // .rxfifo_full_thresh = 1,        //UART_FULL_THRESH_DEFAULT,  //120 default!! aghh! need receive 120 chars before we see them

        .rx_timeout_thresh = 1,       //UART_TOUT_THRESH_DEFAULT,  //10 works well for my short messages I need send/receive

        // .txfifo_empty_intr_thresh = 10, //UART_EMPTY_THRESH_DEFAULT

    };

    uart_intr_config(UART_NUM_1, &uart_intr);

    uart_set_rx_timeout(UART_NUM_1, 1);

    uart_enable_rx_intr(UART_NUM_1);

    uart_param_config(UART_NUM_1, &uart_config);

    uart_set_pin(UART_NUM_1, TXD_PIN, RXD_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);

    uart_driver_install(UART_NUM_1, RX_BUF_SIZE * 2, 0, 0, NULL, 0);

}



static void rx_task(void *arg)

{

    LOG(LL_INFO, ("Start receiving"));

    uint8_t *data = (uint8_t *)malloc(RX_BUF_SIZE + 1);

    while (1)

    {

        int rxBytes = 0;

        rxBytes = uart_read_bytes(UART_NUM_1, data, RX_BUF_SIZE, 10);

        if (rxBytes > 0)

        {

            data[rxBytes] = 0;

            LOG(LL_INFO, ("Read %d bytes: '%s'", rxBytes, data));

        }

    }

    free(data);

}



enum mgos_app_init_result mgos_app_init(void)

{

    init();

    xTaskCreate(rx_task, "uart_rx_task", 1024 * 2, NULL, configMAX_PRIORITIES, NULL);

    return MGOS_APP_INIT_SUCCESS;

}

Code: Select all

// Read data from UART.
const int uart_num = UART2;
uint8_t data[128];
int length = 0;
ESP_ERROR_CHECK(uart_get_buffered_data_len(uart_num, (size_t*)&length));
length = uart_read_bytes(uart_num, data, length, 100);

Code: Untitled.c Select all

uart_get_buffered_data_len(UART_NUM_1, (size_t*)&rxBytes);

Code: Select all

ESP_ERROR_CHECK(uart_set_rx_full_threshold(uartPort, 1));