Correct way to uninit libuarte

[Andrea]

Hello there,

I am using the nRF52832 and I need to talk to 2 different UART based peripherals.

In order to do that I was thinking to use the libuarte module in time share fashion as I don't need both peripherals to be on at the same time.

My code now simply initialize the libuarte drv module, send some data and uninit the module with the nrf_libuarte_drv_uninit function. 

Unfortunately when I reinit the module I get an error:

app: ASSERTION FAILED at C:\AL2TECH\CLIENTS\TAUA\Project_TBD\4_Software\Firmware\NRF5_SDK\nRF5SDK160098a08e2\modules\nrfx\drivers\src\nrfx_gpiote.c:442

I am based on SDK 16.

What would be the right way to unit the libuarte module?

cheers,

Andrea

[Susheel Nuguru]

I have some updated library that exposes the correct way to uninit the uarte, but is based on SDK15.3

Could you check if you could use this file in SDK16, i do not see huge API changes, so hoping that this works without any hurdles.

8686.libuart_reinit.zip

[Andrea]

Thanks, I will try them out.

may I ask why this in not implemented in the main SDK branch?

Cheers

[Susheel Nuguru]

The SDK branch is now only in maintenance mode and this was seen as a new feature with lower priority (unfortunately). but good that we have a workaround here :)

[Andrea]

I see, what would be the best way to address my problem then?

I have two UART peripherals (connected two different TX/RX pins) and the NRF52 has just one UART HW module. I need to swap between the two during my application.

I do not need to use the uartie lib, I just need something to do the job. 

Thanks,

Andrea

[Susheel Nuguru]

If you do not need to use them simultaneously, then you can still use the libuarte with the uninit feature added in the files i attached. This way initialize the UART with one set of TX/RX, complete the transaction, uninit and init with the other TX/RX pin and do the next transaction to the other UART peer.