18 lines
814 B
Plaintext
18 lines
814 B
Plaintext
|
The purpose of this test is to validate that uart_poll_out call is resilient to
|
||
|
|
being interrupted by another uart API call. That includes uart_poll_out called
|
||
|
|
from higher priority context, uart_fifo_fill called from UART interrupt context
|
||
|
|
and uart_tx called from higher priority context. Preemptions shall not lead to
|
||
|
|
any bytes being dropped.
|
||
|
|
|
||
|
|
This test is establishing 3 context from which uart_poll_out is called:
|
||
|
|
- main thread
|
||
|
|
- higher priority thread
|
||
|
|
- k_timer timeout context
|
||
|
|
|
||
|
|
From each context stream of data is being sent. Bytes in streams are encoded as
|
||
|
|
following: 4 MSB bits contains stream ID, 4 LSB bits are incremented.
|
||
|
|
|
||
|
|
Test requires that two pairs of pins are shortened: TX with RX and CTS with RTS.
|
||
|
|
UART receives loopback data and validates if for each stream (identified by ID)
|
||
|
|
data is consistent.
|