refactor(driver): Refactor uart driver for esp8266 idf

examples/peripherals/uart_echo/main/component.mk

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+#
+# Main Makefile. This is basically the same as a component makefile.
+#

examples/peripherals/uart_echo/main/uart_echo_example_main.c

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+// Copyright 2018-2025 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#include "driver/uart.h"
+
+/**
+ * This is an example which echos any data it receives on UART0 back to the sender,
+ * with hardware flow control turned off. It does not use UART driver event queue.
+ *
+ * - Port: UART0
+ * - Receive (Rx) buffer: on
+ * - Transmit (Tx) buffer: off
+ * - Flow control: off
+ * - Event queue: off
+ */
+
+#define BUF_SIZE (1024)
+
+static void echo_task()
+{
+    // Configure parameters of an UART driver,
+    // communication pins and install the driver
+    uart_config_t uart_config = {
+        .baud_rate = 74880,
+        .data_bits = UART_DATA_8_BITS,
+        .parity    = UART_PARITY_DISABLE,
+        .stop_bits = UART_STOP_BITS_1,
+        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE
+    };
+    uart_param_config(UART_NUM_0, &uart_config);
+    uart_driver_install(UART_NUM_0, BUF_SIZE * 2, 0, 0, NULL);
+
+    // Configure a temporary buffer for the incoming data
+    uint8_t *data = (uint8_t *) malloc(BUF_SIZE);
+
+    while (1) {
+        // Read data from the UART
+        int len = uart_read_bytes(UART_NUM_0, data, BUF_SIZE, 20 / portTICK_RATE_MS);
+        // Write data back to the UART
+        uart_write_bytes(UART_NUM_0, (const char *) data, len);
+    }
+}
+
+void app_main()
+{
+    xTaskCreate(echo_task, "uart_echo_task", 1024, NULL, 10, NULL);
+}