How do I know when a UARTE DMA transmission is finished?

[DiBosco]

Folks,

Simple question:

When I set off A DMA transmission on the UART, how do I poll for that transmission having finished? There seem to be no status bits in this UART. Is that really right or am I just being blind? I've tried looking at the EVENTS_TXDRDY, but

It talks about an ENDTX "event" whatever an event is. I assume it's what the rest of the world calls an interrupt? However, I do not want an ISR.

There surely *must* be a way of doing this? I've looked at NRF_UARTE0->EVENTS_TXDRDY and NRF_UARTE0->EVENTS_TXSTARTED but from what I can tell they are of no use at all. Neither seem to change state once set.

Thanks.

[Kenneth]

According to:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/uarte.html?cp=3_1_0_34_2#concept_a54_2gm_wr

The code should be close to:

NRF_UARTE0->EVENTS_ENDTX = 0;
NRF_UARTE0->TASKS_STARTTX = 1;
while(NRF_UARTE0->EVENTS_ENDTX == 0);

But maybe you can take a look at this also:

https://devzone.nordicsemi.com/f/nordic-q-a/26845/uarte-driver-from-scratch