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Test: ResetReason: Increase the UART flush wait

pull/12262/head
Filip Jagodzinski 2020-01-15 13:34:42 +01:00
parent 7d575af4b9
commit 7f1ed02291
2 changed files with 22 additions and 8 deletions
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15
TESTS/mbed_drivers/reset_reason/main.cpp
View File

@ -49,7 +49,20 @@
#define MSG_KEY_RESET_REASON "reason"
#define MSG_KEY_DEVICE_RESET "reset"
#define SERIAL_FLUSH_TIME_MS 20
/* To prevent a loss of Greentea data, the serial buffers have to be flushed
* before the UART peripheral shutdown. The UART shutdown happens when the
* device is entering the deepsleep mode or performing a reset.
*
* With the current API, it is not possible to check if the hardware buffers
* are empty. However, it is possible to determine the time required for the
* buffers to flush.
*
* Assuming the biggest Tx FIFO of 128 bytes (as for CY8CPROTO_062_4343W)
* and a default UART config (9600, 8N1), flushing the Tx FIFO wold take:
* (1 start_bit + 8 data_bits + 1 stop_bit) * 128 * 1000 / 9600 = 133.3 ms.
* To be on the safe side, set the wait time to 150 ms.
*/
#define SERIAL_FLUSH_TIME_MS 150
typedef enum {
CMD_STATUS_CONTINUE,

15
TESTS/mbed_hal/reset_reason/main.cpp
View File

@ -49,19 +49,20 @@
#define MSG_KEY_RESET_REASON "reason"
#define MSG_KEY_DEVICE_RESET "reset"
/* To prevent loss of Greentea data, flush serial buffers before the UART peripheral shutdown. The UART shutdown happens when the
/* To prevent a loss of Greentea data, the serial buffers have to be flushed
* before the UART peripheral shutdown. The UART shutdown happens when the
* device is entering the deepsleep mode or performing a reset.
*
* With the current API, it is not possible to check if the hardware buffers
* are empty. However, you can determine the amount of time required for the
* are empty. However, it is possible to determine the time required for the
* buffers to flush.
*
* For example, NUMAKER_PFM_NUC472:
* The UART peripheral has 16-byte Tx FIFO. With a baud rate of 9600,
* flushing the Tx FIFO would take: 16 * 8 * 1000 / 9600 = 13.3 ms.
* To be on the safe side, set the wait time to 20 ms.
* Assuming the biggest Tx FIFO of 128 bytes (as for CY8CPROTO_062_4343W)
* and a default UART config (9600, 8N1), flushing the Tx FIFO wold take:
* (1 start_bit + 8 data_bits + 1 stop_bit) * 128 * 1000 / 9600 = 133.3 ms.
* To be on the safe side, set the wait time to 150 ms.
*/
#define SERIAL_FLUSH_TIME_MS 20
#define SERIAL_FLUSH_TIME_MS 150
typedef enum {
CMD_STATUS_CONTINUE,