nRF9160 RX interrupt not triggering after UART disabled and enabled again

RE: nRF9160 RX interrupt not triggering after UART disabled and enabled again

Martin Lesund — Mon, 07 Oct 2019 13:38:22 GMT

Hi Smitesh,
I am very sorry for the delay, but I would assume that you have progressed from this issue (?)

If not please share a code snippet on how you implemented this and some serial log output would be nice.

I would also recommend enabling Debug logs in your application.

RE: nRF9160 RX interrupt not triggering after UART disabled and enabled again

khodidas — Tue, 10 Sep 2019 05:40:57 GMT

Hi,

The method suggested by you creates other random issues.

Like MQTT connection failure and Hard fault.

Regards,

Smitesh Mali

RE: nRF9160 RX interrupt not triggering after UART disabled and enabled again

Martin Lesund — Mon, 09 Sep 2019 12:04:47 GMT

Hi Smitesh,
Please try to stop via TASKS_STOPRX and then wait until you get EVENTS_RXTO, and then you can disable UART via the function you did in the first post.

And when you are going to enable UART again you send:

NRF_UARTE2_NS->TASKS_STARTRX = 1;
NRF_UARTE2_NS->TASKS_STARTTX = 1;
and then

nrf_uarte_enable(NRF_UARTE2);

RE: nRF9160 RX interrupt not triggering after UART disabled and enabled again

khodidas — Mon, 09 Sep 2019 09:05:27 GMT

Hi,

I disabled the UART as below

NRF_UARTE2_NS->TASKS_STOPRX  = 1;
NRF_UARTE2_NS->TASKS_STOPTX = 1;
while(NRF_UARTE2_NS->EVENTS_RXTO==0);

I enabled it like below

NRF_UARTE2_NS->TASKS_STARTRX = 1;
NRF_UARTE2_NS->TASKS_STARTTX = 1;

But i observed that current consumption on "power profiler" is around 500 uA.

When i was turning off the UART 2 using "nrf_uarte_disable(NRF_UARTE2)" i was getting 7 uA current.

am i doing turning off UART 2 correctly ?

Regards,

Smitesh Mali

RE: nRF9160 RX interrupt not triggering after UART disabled and enabled again

Martin Lesund — Fri, 06 Sep 2019 14:26:21 GMT

Hi Smitesh,

The implementation of this functionality in uart_nrfx_uarte.c is not correct.
You have to stop via TASKS_STOPRX and then wait until you get EVENTS_RXTO, and then you can disable.

Please look at this documentation for more details.

(here is a snippet on how to disable UART RX)