UART priority problem

[Dhaval Dalvadi]

HI,

I am using nrf52 with other mcu and sending scanned beacon to that mcu.

I have set baud rate to 921600 and transmitting data when mcu request. when mcu request for data Nrf52 stop scanning then process data and then send to mcu.

If i set uart priority to high i am unable to stop scanning using sd_ble_gap_scan_stop() it will stop execution of program.

and if i will set uart priority to low it will send some starting portion of data only.

Is there any priority problem or i need to implement something else to transmit data?

[MartinBL]

Sounds like an interrupt priority or nesting issue. You can't call a softdevice function from within an interrupt context with higher priority.

It would also be useful if you could figure out where and why the execution stops. You can do it like this.

[Turbo J]

You will need those handshake signals (CTS,RTS) with high baud rates like 921600. The softdevice blocks interrupts long enough to for some bytes to be lost otherwise.