Printf only sends first byte and with an odd problem (52832)

RE: Printf only sends first byte and with an odd problem (52832)

Edward — Fri, 17 Feb 2017 04:54:28 GMT

I found the reason was that I use P0.09 as RXD, but I did not define CONFIG_NFCT_PINS_AS_GPIOS.P0.09 is used as NFC pins by default!

RE: Printf only sends first byte and with an odd problem (52832)

Edward — Thu, 16 Feb 2017 16:40:08 GMT

Yes! The application was indeed resetting! I let LEDS on my board blink before APP_UART_FIFO_INIT(),and I move printf out of while(1). I found LEDS were blinking and 's' was received in the same frequency! Why the application was resetting?

RE: Printf only sends first byte and with an odd problem (52832)

wizath — Thu, 16 Feb 2017 16:27:00 GMT

Check if the app_fifo (because you are using uart_fifo) is included in keil project. That should help.

RE: Printf only sends first byte and with an odd problem (52832)

Hung Bui — Thu, 16 Feb 2017 13:50:58 GMT

If you test with the ble_app_uart do you see "UART Start!" printed on the terminal? S printed very fast sounds like the application was resetting and UART haven't managed to print anything more than S before it's reset. You can try to put an infinite loop after you call printf("Start: \n\r"); just call it once, don't put in inside a loop.