nrf52840 BGA footprint P0.22 config as UART0 RX mode issue

RE: nrf52840 BGA footprint P0.22 config as UART0 RX mode issue

Turbo J — Mon, 09 Dec 2019 15:46:36 GMT

Probably by just commenting out some APP_ERROR_CHECK()...

Seriously: You want to check the UART waveform with an oscilloscope. Usually there is a good reason why the RX break flag triggers: The RX line is low for longer than a byte.

RE: nrf52840 BGA footprint P0.22 config as UART0 RX mode issue

liyang — Mon, 09 Dec 2019 07:05:48 GMT

hi, Turbo:

I have disconnect QSPI, I find that uart rx will trigger ERRORSRC RW BREAK, how to resume it?

RE: nrf52840 BGA footprint P0.22 config as UART0 RX mode issue

Turbo J — Sat, 07 Dec 2019 14:08:08 GMT

Nope: P0.22 is connected to the QSPI memory chip and cannot be used as UART RX unless this connection is openend somehow.