UART Echo example in ESP IDF 4.0.1 with UART 1
Posted: Sun Feb 06, 2022 5:14 pm
Hello,
I use the UART Echo example with ESP IDF 4.0.1 and it looks like the software isn´t receiving anything when I use UART 1.
I have bridged pin 5 and 18 and the example works like a charm when I use ESP IDF version 4.3.1. How can I use this example with IDF 4.0.1? What is the bug here?
Thank you for help.
I use the UART Echo example with ESP IDF 4.0.1 and it looks like the software isn´t receiving anything when I use UART 1.
Code: Select all
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/uart.h"
#include "driver/gpio.h"
#include "sdkconfig.h"
#include "esp_log.h"
static const char *TAG = "UART TEST";
#define INTERFACE UART_NUM_1
#define BUF_SIZE (1024)
static void echo_task(void *arg)
{
uart_config_t uart_config = {
.baud_rate = 115200,
.data_bits = UART_DATA_8_BITS,
.parity = UART_PARITY_DISABLE,
.stop_bits = UART_STOP_BITS_1,
.flow_ctrl = UART_HW_FLOWCTRL_DISABLE
};
int intr_alloc_flags = 0;
#if CONFIG_UART_ISR_IN_IRAM
intr_alloc_flags = ESP_INTR_FLAG_IRAM;
#endif
ESP_ERROR_CHECK(uart_driver_install(INTERFACE, BUF_SIZE * 2, 0, 0, NULL, intr_alloc_flags));
ESP_ERROR_CHECK(uart_param_config(INTERFACE, &uart_config));
ESP_ERROR_CHECK(uart_set_pin(INTERFACE, 5, 18, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE));
char Message[] = "AA";
uint8_t *data = (uint8_t *) malloc(BUF_SIZE);
while(1)
{
uart_write_bytes(INTERFACE, (const char*)Message, sizeof(Message));
int len = uart_read_bytes(INTERFACE, data, (BUF_SIZE - 1), 20 / portTICK_RATE_MS);
if(len)
{
data[len] = '\0';
ESP_LOGI(TAG, "Recv str: %s", (char *) data);
}
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
}
extern "C" void app_main(void)
{
xTaskCreate(echo_task, "uart_echo_task", 2048, NULL, 10, NULL);
}
Thank you for help.