Initializing UART for BLE-NUS

[leehong]

Hi,

Using ble-app-uart sdk9 example:

1. Is there a difference where I initialize uart in main? My code is able to run when I shifted the uart_init() after ble_stack_init on my custom board, but gets stucks at softdevice initializing ble stack if uart_init() comes before ble_stack_init.

2. Why is it on my custom board, using uart-ble, only baud rates of 2400 or 1200 would allow ble_nus_init to run without getting stuck? (ie. higher baud rates would meant that the code gets stuck inside ble_nus_init)

3. If my GPIO pins are unconnected/floating, is it ok to define them as RTS and CTS pins? or RTS/CTS have to be physically wired to something?

[RK]

"Stuck". Code does not 'stick', it's running somewhere, it's doing something. You are probably in an error handler. Put a breakpoint in the error handler or hit break in the debugger and find out where you are and what function returned what error.

3. No it's not - don't connect floating pins to RTS/CTS.