1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*
* 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 TX Blocking Flush Test
*
* Test Objectives:
* - Validate TX flush completion timing in blocking mode and ensure subsequent RX integrity
* - Verify APIs: rt_device_find, rt_device_control(RT_DEVICE_CTRL_CONFIG / RT_SERIAL_CTRL_TX_FLUSH / _SET_TX_TIMEOUT / RT_SERIAL_CTRL_RX_FLUSH),
* rt_device_open with RT_DEVICE_FLAG_RX_BLOCKING | RT_DEVICE_FLAG_TX_BLOCKING,
* rt_device_write, rt_device_read
*
* Test Scenarios:
* - **Scenario 1 (Flush Timing & Data Integrity / tc_uart_api):**
* 1. Configure enlarged TX buffer and set TX timeout guard.
* 2. Perform multiple iterations with varied payload sizes (aligned and unaligned), recording ticks needed to flush queued bytes and verifying they fall within `[expect_time, expect_time + 10]`.
* 3. After each flush, resend small samples and confirm received data matches transmitted pattern.
*
* Verification Metrics:
* - `rt_device_write` returns full payload length; measured tick difference respects expected window.
* - Post-flush RX comparisons succeed for all sample sizes.
*
* Dependencies:
* - Requires `RT_UTEST_SERIAL_V2` with hardware loopback and TX flush capability on `RT_SERIAL_TC_DEVICE_NAME`.
* - Optional DMA ping buffer configuration supported.
*
* Expected Results:
* - Test completes without assertions; logs show flush durations per payload.
* - Utest harness prints `[ PASSED ] [ result ] testcase (components.drivers.serial.v2.uart_flush_txb)`.
*/
#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 test_item(rt_uint8_t *uart_write_buffer, rt_uint32_t send_size)
{
rt_uint32_t old_tick;
rt_tick_t tick_diff;
rt_tick_t expect_time = send_size * 0.0868;
rt_uint8_t readBuf[16] = {0};
rt_uint32_t readSize = 0;
if (send_size >= sizeof(readBuf))
{
readSize = sizeof(readBuf);
}
else
{
readSize = send_size;
}
/* In interrupt mode, ticks may be inaccurate; compensation should be applied*/
if (send_size > 384)
{
expect_time -= send_size / 384;
}
old_tick = rt_tick_get();
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;
}
rt_device_control(&serial->parent, RT_SERIAL_CTRL_TX_FLUSH, RT_NULL);
tick_diff = rt_tick_get() - old_tick;
if (tick_diff < expect_time || tick_diff > (expect_time + 10))
{
LOG_E("send_size [%4d], time required for TXB mode transmission to complete [%3d], expect_time [%3d]", send_size, tick_diff, expect_time);
return -RT_ERROR;
}
else
{
LOG_I("send_size [%4d], time required for TXB mode transmission to complete [%3d], expect_time [%3d]", send_size, tick_diff, expect_time);
}
/* Resend the data and check for any discrepancies upon reception */
if (readSize > 0)
{
rt_device_control(&serial->parent, RT_SERIAL_CTRL_RX_FLUSH, RT_NULL);
rt_device_write(&serial->parent, 0, uart_write_buffer, readSize);
rt_device_read(&serial->parent, 0, readBuf, readSize);
for (rt_uint32_t i = 0; i < readSize; i++)
{
if (readBuf[i] != uart_write_buffer[i])
{
LOG_E("index: %d, Read Different data -> former data: %x, current data: %x.", i, uart_write_buffer[i], readBuf[i]);
return -RT_ERROR;
}
}
}
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 = RT_SERIAL_TC_TXBUF_SIZE * 5 + 10;
#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_BLOCKING);
if (result != RT_EOK)
{
LOG_E("Open uart device failed.");
return RT_FALSE;
}
rt_uint8_t *uart_write_buffer;
rt_uint32_t i;
rt_int32_t tx_timeout = 10 * 1000;
uart_write_buffer = (rt_uint8_t *)rt_malloc(RT_SERIAL_TC_TXBUF_SIZE * 5 + 10);
for (rt_uint32_t count = 0; count < (RT_SERIAL_TC_TXBUF_SIZE * 5 + 10); count++)
{
uart_write_buffer[count] = count;
}
rt_device_control(&serial->parent, RT_SERIAL_CTRL_SET_TX_TIMEOUT, (void *)&tx_timeout);
srand(rt_tick_get());
for (i = 0; i < RT_SERIAL_TC_SEND_ITERATIONS; i++)
{
if (RT_EOK != test_item(uart_write_buffer, RT_SERIAL_TC_TXBUF_SIZE * (rand() % 6)))
{
result = -RT_ERROR;
goto __exit;
}
if (RT_EOK != test_item(uart_write_buffer, RT_SERIAL_TC_TXBUF_SIZE * (rand() % 6) + 1))
{
result = -RT_ERROR;
goto __exit;
}
if (RT_EOK != test_item(uart_write_buffer, rand() % (RT_SERIAL_TC_TXBUF_SIZE * 5)))
{
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)
{
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_flush_txb", utest_tc_init, utest_tc_cleanup, 30);
#endif /* TC_UART_USING_TC */
|
