Merge branch 'bugfix/uart_async_rxtxtasks_example_stack_overflow' into 'master'

fix(uart): enlarged task stack size for uart_async_rxtxtasks example

Closes IDFGH-14607, IDF-12230, and IDFGH-12126

See merge request espressif/esp-idf!36903

docs/en/api-reference/peripherals/uart.rst

@@ -23,9 +23,9 @@ Functional Overview
 
 The overview describes how to establish communication between an {IDF_TARGET_NAME} and other UART devices using the functions and data types of the UART driver. A typical programming workflow is broken down into the sections provided below:
 
-1. :ref:`uart-api-setting-communication-parameters` - Setting baud rate, data bits, stop bits, etc.
+1. :ref:`uart-api-driver-installation` - Allocating {IDF_TARGET_NAME}'s resources for the UART driver
-2. :ref:`uart-api-setting-communication-pins` - Assigning pins for connection to a device
+2. :ref:`uart-api-setting-communication-parameters` - Setting baud rate, data bits, stop bits, etc.
-3. :ref:`uart-api-driver-installation` - Allocating {IDF_TARGET_NAME}'s resources for the UART driver
+3. :ref:`uart-api-setting-communication-pins` - Assigning pins for connection to a device
 4. :ref:`uart-api-running-uart-communication` - Sending/receiving data
 5. :ref:`uart-api-using-interrupts` - Triggering interrupts on specific communication events
 6. :ref:`uart-api-deleting-driver` - Freeing allocated resources if a UART communication is no longer required
@@ -39,13 +39,39 @@ Steps 1 to 3 comprise the configuration stage. Step 4 is where the UART starts o
 The UART driver's functions identify each of the UART controllers using :cpp:type:`uart_port_t`. This identification is needed for all the following function calls.
 
 
+.. _uart-api-driver-installation:
+
+Install Drivers
+^^^^^^^^^^^^^^^^^^^
+
+First of all, install the driver by calling :cpp:func:`uart_driver_install` and specify the following parameters:
+
+- UART port number
+- Size of RX ring buffer
+- Size of TX ring buffer
+- Event queue size
+- Pointer to store the event queue handle
+- Flags to allocate an interrupt
+
+.. _driver-code-snippet:
+
+The function allocates the required internal resources for the UART driver.
+
+.. code-block:: c
+
+    // Setup UART buffered IO with event queue
+    const int uart_buffer_size = (1024 * 2);
+    QueueHandle_t uart_queue;
+    // Install UART driver using an event queue here
+    ESP_ERROR_CHECK(uart_driver_install({IDF_TARGET_UART_EXAMPLE_PORT}, uart_buffer_size, uart_buffer_size, 10, &uart_queue, 0));
+
+
 .. _uart-api-setting-communication-parameters:
 
 Set Communication Parameters
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-UART communication parameters can be configured all in a single step or individually in multiple steps.
+As the next step, UART communication parameters can be configured all in a single step or individually in multiple steps.
-
 
 Single Step
 """""""""""
@@ -113,35 +139,6 @@ The same macro :c:macro:`UART_PIN_NO_CHANGE` should be specified for pins that w
   // Set UART pins(TX: IO4, RX: IO5, RTS: IO18, CTS: IO19)
   ESP_ERROR_CHECK(uart_set_pin({IDF_TARGET_UART_EXAMPLE_PORT}, 4, 5, 18, 19));
 
-.. _uart-api-driver-installation:
-
-Install Drivers
-^^^^^^^^^^^^^^^^^^^
-
-Once the communication pins are set, install the driver by calling :cpp:func:`uart_driver_install` and specify the following parameters:
-
-- UART port number
-- Size of TX ring buffer
-- Size of RX ring buffer
-- Pointer to store the event queue handle
-- Event queue size
-- Flags to allocate an interrupt
-
-.. _driver-code-snippet:
-
-The function allocates the required internal resources for the UART driver.
-
-.. code-block:: c
-
-    // Setup UART buffered IO with event queue
-    const int uart_buffer_size = (1024 * 2);
-    QueueHandle_t uart_queue;
-    // Install UART driver using an event queue here
-    ESP_ERROR_CHECK(uart_driver_install({IDF_TARGET_UART_EXAMPLE_PORT}, uart_buffer_size, \
-                                            uart_buffer_size, 10, &uart_queue, 0));
-
-Once this step is complete, you can connect the external UART device and check the communication.
-
 
 .. _uart-api-running-uart-communication:
 

docs/zh_CN/api-reference/peripherals/uart.rst

@@ -23,9 +23,9 @@
 
 下文介绍了如何使用 UART 驱动程序的函数和数据类型在 {IDF_TARGET_NAME} 和其他 UART 设备之间建立通信。基本编程流程分为以下几个步骤：
 
-1. :ref:`uart-api-setting-communication-parameters` - 设置波特率、数据位、停止位等
+1. :ref:`uart-api-driver-installation` - 为 UART 驱动程序分配 {IDF_TARGET_NAME} 资源
-2. :ref:`uart-api-setting-communication-pins` - 分配连接设备的管脚
+2. :ref:`uart-api-setting-communication-parameters` - 设置波特率、数据位、停止位等
-3. :ref:`uart-api-driver-installation` - 为 UART 驱动程序分配 {IDF_TARGET_NAME} 资源
+3. :ref:`uart-api-setting-communication-pins` - 分配连接设备的管脚
 4. :ref:`uart-api-running-uart-communication` - 发送/接收数据
 5. :ref:`uart-api-using-interrupts` - 触发特定通信事件的中断
 6. :ref:`uart-api-deleting-driver` - 如无需 UART 通信，则释放已分配的资源
@@ -39,13 +39,39 @@
 UART 驱动程序函数通过 :cpp:type:`uart_port_t` 识别不同的 UART 控制器。调用以下所有函数均需此标识。
 
 
+.. _uart-api-driver-installation:
+
+安装驱动程序
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+首先，请调用 :cpp:func:`uart_driver_install` 安装驱动程序并指定以下参数：
+
+- UART 控制器编号
+- Rx 环形缓冲区的大小
+- Tx 环形缓冲区的大小
+- 事件队列大小
+- 指向事件队列句柄的指针
+- 分配中断的标志
+
+.. _driver-code-snippet:
+
+该函数将为 UART 驱动程序分配所需的内部资源。
+
+.. code-block:: c
+
+    // Setup UART buffered IO with event queue
+    const int uart_buffer_size = (1024 * 2);
+    QueueHandle_t uart_queue;
+    // Install UART driver using an event queue here
+    ESP_ERROR_CHECK(uart_driver_install({IDF_TARGET_UART_EXAMPLE_PORT}, uart_buffer_size, uart_buffer_size, 10, &uart_queue, 0));
+
+
 .. _uart-api-setting-communication-parameters:
 
 设置通信参数
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-UART 通信参数可以在一个步骤中完成全部配置，也可以在多个步骤中单独配置。
+其次，UART 通信参数可以在一个步骤中完成全部配置，也可以在多个步骤中单独配置。
-
 
 一次性配置所有参数
 """"""""""""""""""""""""""""""""
@@ -113,35 +139,6 @@ UART 通信参数可以在一个步骤中完成全部配置，也可以在多个
   // Set UART pins(TX: IO4, RX: IO5, RTS: IO18, CTS: IO19)
   ESP_ERROR_CHECK(uart_set_pin({IDF_TARGET_UART_EXAMPLE_PORT}, 4, 5, 18, 19));
 
-.. _uart-api-driver-installation:
-
-安装驱动程序
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-通信管脚设置完成后，请调用 :cpp:func:`uart_driver_install` 安装驱动程序并指定以下参数：
-
-- UART 控制器编号
-- Tx 环形缓冲区的大小
-- Rx 环形缓冲区的大小
-- 指向事件队列句柄的指针
-- 事件队列大小
-- 分配中断的标志
-
-.. _driver-code-snippet:
-
-该函数将为 UART 驱动程序分配所需的内部资源。
-
-.. code-block:: c
-
-    // Setup UART buffered IO with event queue
-    const int uart_buffer_size = (1024 * 2);
-    QueueHandle_t uart_queue;
-    // Install UART driver using an event queue here
-    ESP_ERROR_CHECK(uart_driver_install({IDF_TARGET_UART_EXAMPLE_PORT}, uart_buffer_size, \
-                                            uart_buffer_size, 10, &uart_queue, 0));
-
-此步骤完成后，可连接外部 UART 设备检查通信。
-
 
 .. _uart-api-running-uart-communication:
 

examples/peripherals/uart/uart_async_rxtxtasks/main/Kconfig.projbuild

@@ -0,0 +1,35 @@
+menu "Example Configuration"
+
+    orsource "$IDF_PATH/examples/common_components/env_caps/$IDF_TARGET/Kconfig.env_caps"
+
+    config EXAMPLE_UART_BAUD_RATE
+        int "UART communication speed"
+        range 1200 115200
+        default 115200
+        help
+            UART communication speed for the example.
+
+    config EXAMPLE_UART_RXD
+        int "UART RXD pin number"
+        range ENV_GPIO_RANGE_MIN ENV_GPIO_IN_RANGE_MAX
+        default 5
+        help
+            GPIO number for UART RX pin. See UART documentation for more information
+            about available pin numbers for UART.
+
+    config EXAMPLE_UART_TXD
+        int "UART TXD pin number"
+        range ENV_GPIO_RANGE_MIN ENV_GPIO_OUT_RANGE_MAX
+        default 4
+        help
+            GPIO number for UART TX pin. See UART documentation for more information
+            about available pin numbers for UART.
+
+    config EXAMPLE_TASK_STACK_SIZE
+        int "Example task stack size"
+        range 1024 16384
+        default 3072
+        help
+            Defines stack size for UART TX and RX tasks. Insufficient stack size can cause crash.
+
+endmenu

examples/peripherals/uart/uart_async_rxtxtasks/main/uart_async_rxtxtasks_main.c

@@ -16,13 +16,13 @@
 
 static const int RX_BUF_SIZE = 1024;
 
-#define TXD_PIN (GPIO_NUM_4)
+#define TXD_PIN (CONFIG_EXAMPLE_UART_TXD)
-#define RXD_PIN (GPIO_NUM_5)
+#define RXD_PIN (CONFIG_EXAMPLE_UART_RXD)
 
 void init(void)
 {
     const uart_config_t uart_config = {
-        .baud_rate = 115200,
+        .baud_rate = CONFIG_EXAMPLE_UART_BAUD_RATE,
         .data_bits = UART_DATA_8_BITS,
         .parity = UART_PARITY_DISABLE,
         .stop_bits = UART_STOP_BITS_1,
@@ -72,6 +72,6 @@ static void rx_task(void *arg)
 void app_main(void)
 {
     init();
-    xTaskCreate(rx_task, "uart_rx_task", 1024 * 2, NULL, configMAX_PRIORITIES - 1, NULL);
+    xTaskCreate(rx_task, "uart_rx_task", CONFIG_EXAMPLE_TASK_STACK_SIZE, NULL, configMAX_PRIORITIES - 1, NULL);
-    xTaskCreate(tx_task, "uart_tx_task", 1024 * 2, NULL, configMAX_PRIORITIES - 2, NULL);
+    xTaskCreate(tx_task, "uart_tx_task", CONFIG_EXAMPLE_TASK_STACK_SIZE, NULL, configMAX_PRIORITIES - 2, NULL);
 }

examples/peripherals/uart/uart_async_rxtxtasks/pytest_async_rxtxtasks.py

@@ -0,0 +1,10 @@
+# SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: CC0-1.0
+import pytest
+from pytest_embedded import Dut
+
+
+@pytest.mark.supported_targets
+@pytest.mark.generic
+def test_uart_async_rxtxtasks_example(dut: Dut) -> None:
+    dut.expect_exact('TX_TASK: Wrote 11 bytes')

examples/peripherals/uart/uart_events/pytest_events.py

@@ -0,0 +1,14 @@
+# SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: CC0-1.0
+import pytest
+from pytest_embedded import Dut
+
+
+@pytest.mark.supported_targets
+@pytest.mark.generic
+def test_uart_events_example(dut: Dut) -> None:
+    dut.expect_exact('Returned from app_main()')
+    dut.write('a')
+    dut.expect_exact('uart_events: [UART DATA]: 2')  # dut.write will add an extra '\n'
+    dut.write('HA')
+    dut.expect_exact('uart_events: [UART DATA]: 3')  # dut.write will add an extra '\n'

examples/peripherals/uart/uart_select/pytest_uart_select.py

@@ -0,0 +1,12 @@
+# SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: CC0-1.0
+import pytest
+from pytest_embedded import Dut
+
+
+@pytest.mark.supported_targets
+@pytest.mark.generic
+def test_uart_select_example(dut: Dut) -> None:
+    dut.expect_exact('uart_select_example: Timeout has been reached and nothing has been received')
+    dut.write('a')
+    dut.expect_exact('uart_select_example: Received: a')