SDK12.30 & software S130

[Lee]

When I debug my product ,using nrf51822, using the ble_uart example, my product will using MCU commnication with BLE,using uart.

When I modify the PIN of the uart TX pin with 2 ,the ble stack will be crashed.Why, i have find the conflict ,but i can not find.

Would you please give me some advice?

[Lee]

Hi  Håkon Alseth: 

 I have checked the code and the sch ,and sure as following:

 I am using S130 softdevice ,and SDk has test SDK11,SDK12.30.

in the sch, using tx as PIN 2,RX as pin 3.And no CTS & RTS.

 I have modified the SDK's example ble_uart code ,

when i modify the rx pin to 3, the stack will be crashed . i am sure .

I using the 32.768 with NRF_CLOCK_LF_SRC_SYNTH define in SDK11.

the pin 3 ,not pin 2 will be caused the stack crashed. 

[Håkon Alseth]

Is there anything connected to your RXD line? If it is left floating, you may end up in this scenario:

https://devzone.nordicsemi.com/f/nordic-q-a/40697/how-to-resolve-the-error-nrf_error_no_mem-at-the-case-app_uart_communication_error-in-uart_event_handle

There's several suggestions on how to work around this issue in the above thread. Could you check this, and if it still does not work, please provide assertion information (line/file/err_code)? 

Kind regards,

Håkon