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Ran 09 Sep 2018 09:03PM UTC

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Committed 09 Sep 2018 08:59PM UTC coverage: 33.319% (+0.6%) from 32.681%

Job # NAME=tools-py2.7

Build Type

Pull #8046

travis-ci

Committed by

web-flow

Commit Message

NRF52 serial: Fix UART console RX

While investigating the RX issue on NRF52_DK after SDK 14 updates,
it is observed that the RX FIFO doesn't get filled up when the
flow control is disabled. If using Serial interface, the stdio file
handles (0, 1, 2) get opened. This results in configuring the flow
control for STDIO.

However, if RawSerial is used, the STDIO file handles
don't get opened. During the debug process it was observed that if the
flow control is configured once and set to disabled the RX flow worked
as expected.

Alternative to this approach is that user application specifically
enables flow control as done in mbed's Greentea test suite. See https://goo.gl/r8nBYH

See https://goo.gl/8VB2qg step 14 for _initio's description.
See test code to reproduce the issue and test fix here: https://goo.gl/AQU1xG

Pull Request Pull Request #8046: NRF52 serial: Fix UART console RX

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