RE: UART RX executed when connected via BT

Syrius — Fri, 30 Jan 2015 12:59:35 GMT

Of course I call it before SD:

int main(void)
{
// Initialize
leds_init();
timers_init();
gpiote_init();
controls_init();
uart_init();
ble_stack_init();
scheduler_init();    
gap_params_init();
services_init();
advertising_init();
sensor_sim_init();
conn_params_init();
sec_params_init();
...
}

Hmmm. You are right. I configured both pin as output. I will check it... Thank you for your help!

RE: UART RX executed when connected via BT

Stefan Birnir Sverrisson — Fri, 30 Jan 2015 12:02:56 GMT

Hmm, that sounds a bit strange. You should call uart_init function before you call the softdevice. Are you doing that?

One question: Why do you not use app_uart library directly?

Update 30.1.2014 Perhaps it has something to do with the gpio configuration of the RXD and TXD pins. I would suggest to configure this as follows:

// Configure RX and TX pins.
nrf_gpio_cfg_output(0);
nrf_gpio_pin_set(0);
nrf_gpio_cfg_input(1, NRF_GPIO_PIN_NOPULL);

NRF_UART0->PSELTXD = 0;
NRF_UART0->PSELRXD = 1;

It seems that in your code you have configured pin 0 both as output and input.

I copy also the NOPULL configuration from the app_uart library, as the peer UART device should drive the signal for the RXD input pin.