zephyr

History

Krzysztof Chruscinski c590b3545a drivers: serial: Use microseconds to represent timeout Updated uart_rx_enable() and uart_tx() to use timeout given in microseconds. Previously argument was given in milliseconds. However, there are cases when milliseconds granularity is not enough and can significantly reduce a throughput, e.g. 1ms is 100 bytes at 1Mb. Updated 4 drivers which implement asynchronous API. Updated places where API was used. Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>		2021-10-12 12:26:56 +02:00
..
boards
src	drivers: serial: Use microseconds to represent timeout	2021-10-12 12:26:56 +02:00
CMakeLists.txt	cmake: increase minimal required version to 3.20.0	2021-08-20 09:47:34 +02:00
prj.conf
README.txt
testcase.yaml	tests: drivers: uart: uart_mix_fifo_poll: Add low power configuration	2021-03-08 12:51:50 +01:00

README.txt

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.