code is getting stuck printing a character to UART

[Di]

I have Rezence SDK working well with Keil uversion with wired and wireless debug without any issues on either nRF51 and nrf51822 DKs. When I port the project to Eclipse with GNU ARM, the code is getting stuck at printing a single character using either simple_uart_put or app_uart_put API infinite times. Occasionally when I step through the simple_uart_put code, it starts to work properly.

softdevice used: s110_nrf51822_7.0.0-3.alpha_softdevice.hex excerpt from the makefile:

// Tool invocations EMF.elf: $(OBJS) $(USER_OBJS) arm-none-eabi-gcc -mcpu=cortex-m0 -march=armv6-m -mthumb -O3 -fno-builtin -Wall -g3 -T "C:\Users\yy\workspace\EMF\gcc\gcc_nrf51_s110_xxaa.ld" -Xlinker --gc-sections -Xlinker --print-gc-sections -L"C:\Users\yy\workspace\EMF\Lib" -L"C:\Users\yy\workspace\EMF\gcc" -Wl,-Map,"EMF.map" --specs=nano.specs -mfloat-abi=soft -mabi=aapcs -o "EMF.elf" $(OBJS) $(USER_OBJS) $(LIBS) $(MAKE) --no-print-directory post-build

Am I missing anything? Thanks and best regards.

[Di]

Apparently, softdevice interrupts create this behavior. Why with Keil it does not happened and how to fix it in GNU.

[Hung Bui]

@Di: We haven't seen this issue. I would suggest you to try with the ble_app_uart, where we also use UART when softdevice is active.

Anyway, since your question is about A4WP SDK, it should be ideally supported on our private support portal. Please send your question in the My Page section on our website.