NRF_UARTE0: Can I check received bytes befor generating event EVENTS_ENDRX

[jixing.zou]

Hi all, About the NRF_UARTE0 of nRF52, I want to check the number of received data(example:I set RXD.MAXCNT=16, but I just receive 10 bytes now.Then I want to handler these 10 bytes,how to to?). According to doc,I can't find any way to get the length of received data,just generate event EVENTS_ENDRX when the length received bytes is equal to RXD.MAXCNT.I don't want to trigger STOPRX task to generate event EVENTS_ENDRX,then read RXD.AMOUNT to check this, Maybe lost bytes. So how can I do this?

[Hung Bui]

Hi Zou,

I don't think it's possible. You need to trigger a STOPRX task and read the amount when EVENTS_ENDRX occurs. You can have a look at this discussion.

[jcondon]

I'm running into the same issue on my end. With the current peripheral design, I need to setup a periodic timer which triggers TASK_STOPRX, causes the EVENTS_ENDRX interrupt, and the I can read RXD.AMOUNT. This forces me to set a latency value (the period of the timer) and delays all of my messages. I feel like this is a hardware bug and should be listed in the errata.