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/*
* Copyright (c) 2006-2025 RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2025-11-13 CYFS Add standardized utest documentation block
*/
/**
* Test Case Name: UART Blocking RX Timeout Test
*
* Test Objectives:
* - Validate blocking receive timeout behavior while TX operates non-blocking
* - Verify APIs: rt_device_find, rt_device_control(RT_SERIAL_CTRL_SET_RX_TIMEOUT / _TX_FLUSH),
* rt_device_open with RT_DEVICE_FLAG_RX_BLOCKING | RT_DEVICE_FLAG_TX_NON_BLOCKING,
* rt_device_write, rt_device_read
*
* Test Scenarios:
* - **Scenario 1 (RX Timeout Sweep / tc_uart_api):**
* 1. Reconfigure UART buffers (optional DMA ping buffer) and open in RX blocking / TX non-blocking mode.
* 2. Allocate reusable TX buffer and iterate `RT_SERIAL_TC_SEND_ITERATIONS` times.
* 3. For each iteration, randomize burst length (1024~2047 bytes), program RX timeout, transmit payload,
* then read back and ensure received size reflects timeout truncation.
* 4. Flush TX FIFO and delay to allow residual bytes to drain before next iteration.
*
* Verification Metrics:
* - Each receive length lies within `[rx_timeout_send_size - 70, send_size - 80]`.
* - Transmission always completes full burst; overall loop exits with RT_EOK and device closes successfully.
*
* Dependencies:
* - Requires `RT_UTEST_SERIAL_V2` with UART loopback (`RT_SERIAL_TC_DEVICE_NAME` TX shorted to RX).
* - Serial driver must support RX timeout control and optional DMA ping buffer configuration.
* - Random number generator and system tick used for timeout computation.
*
* Expected Results:
* - No assertions triggered; log traces show per-iteration timeout measurements.
* - Utest framework prints `[ PASSED ] [ result ] testcase (components.drivers.serial.v2.uart_timeout_rxb)`.
*/
#include <rtthread.h>
#include "utest.h"
#include <rtdevice.h>
#include <stdlib.h>
#ifdef RT_UTEST_SERIAL_V2
static struct rt_serial_device *serial;
static rt_err_t uart_find(void)
{
serial = (struct rt_serial_device *)rt_device_find(RT_SERIAL_TC_DEVICE_NAME);
if (serial == RT_NULL)
{
LOG_E("find %s device failed!\n", RT_SERIAL_TC_DEVICE_NAME);
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t rx_timeout_test_item(rt_uint8_t *uart_write_buffer, rt_uint32_t send_size)
{
rt_uint32_t readSize = 0;
rt_int32_t rx_timeout_send_size = send_size - send_size / 3;
rt_int32_t rx_timeout = rt_tick_from_millisecond(0.0868 * rx_timeout_send_size + 1);
rt_device_control(&serial->parent, RT_SERIAL_CTRL_SET_RX_TIMEOUT, (void *)&rx_timeout);
rt_ssize_t size = rt_device_write(&serial->parent, 0, uart_write_buffer, send_size);
if (size != send_size)
{
LOG_E("size [%4d], send_size [%4d]", size, send_size);
return -RT_ERROR;
}
readSize = rt_device_read(&serial->parent, 0, uart_write_buffer, size);
if (readSize < (rx_timeout_send_size - 70) || readSize > (send_size - 80))
{
LOG_E("readSize [%4d], rx_timeout_send_size [%4d]", readSize, rx_timeout_send_size);
return -RT_ERROR;
}
rt_device_control(&serial->parent, RT_SERIAL_CTRL_TX_FLUSH, RT_NULL);
/* Waiting for rx to complete reception */
rt_thread_mdelay(0.0868 * (send_size / 3));
LOG_I("rx timeout send_size [%4d]", send_size);
return RT_EOK;
}
static rt_bool_t uart_api()
{
rt_err_t result = RT_EOK;
result = uart_find();
if (result != RT_EOK)
{
return RT_FALSE;
}
/* Reinitialize */
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
config.baud_rate = BAUD_RATE_115200;
config.rx_bufsz = RT_SERIAL_TC_RXBUF_SIZE;
config.tx_bufsz = 2048;
#ifdef RT_SERIAL_USING_DMA
config.dma_ping_bufsz = RT_SERIAL_TC_RXBUF_SIZE / 2;
#endif
rt_device_control(&serial->parent, RT_DEVICE_CTRL_CONFIG, &config);
result = rt_device_open(&serial->parent, RT_DEVICE_FLAG_RX_BLOCKING | RT_DEVICE_FLAG_TX_NON_BLOCKING);
if (result != RT_EOK)
{
LOG_E("Open uart device failed.");
return RT_FALSE;
}
rt_uint8_t *uart_write_buffer;
rt_uint32_t i;
uart_write_buffer = (rt_uint8_t *)rt_malloc(2048);
for (i = 0; i < RT_SERIAL_TC_SEND_ITERATIONS; i++)
{
srand(rt_tick_get());
if (RT_EOK != rx_timeout_test_item(uart_write_buffer, 1024 + (rand() % 1024)))
{
LOG_E("test_item failed.");
result = -RT_ERROR;
goto __exit;
}
}
__exit:
rt_free(uart_write_buffer);
rt_device_close(&serial->parent);
rt_thread_mdelay(5);
return result == RT_EOK ? RT_TRUE : RT_FALSE;
}
static void tc_uart_api(void)
{
uassert_true(uart_api() == RT_TRUE);
}
static rt_err_t utest_tc_init(void)
{
LOG_I("UART TEST: Please connect Tx and Rx directly for self testing.");
return RT_EOK;
}
static rt_err_t utest_tc_cleanup(void)
{
rt_device_t uart_dev = rt_device_find(RT_SERIAL_TC_DEVICE_NAME);
while (rt_device_close(uart_dev) != -RT_ERROR);
return RT_EOK;
}
static void testcase(void)
{
UTEST_UNIT_RUN(tc_uart_api);
}
UTEST_TC_EXPORT(testcase, "components.drivers.serial.v2.uart_timeout_rxb", utest_tc_init, utest_tc_cleanup, 30);
#endif /* TC_UART_USING_TC */
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