Can I use NUS service without having the UART pins configured/connected?

RE: Can I use NUS service without having the UART pins configured/connected?

Jorge — Fri, 12 Aug 2016 11:00:55 GMT

No, maybe I'm being misunderstood. I want to use the UART on the future to display some messages on my computer, but if I initialize it it gives me the error above explained. But using the same configuration, just changing between BLE peripheral to central (advertising -> scanning), it works fine.

RE: Can I use NUS service without having the UART pins configured/connected?

Øyvind Karlsen — Fri, 12 Aug 2016 10:13:54 GMT

The example ble_app_nus calls UART functions in the ble_nus_handler, thats why it reports errors when it is not defined.

RE: Can I use NUS service without having the UART pins configured/connected?

Jorge — Fri, 12 Aug 2016 09:28:26 GMT

I commented the Uart code, and the spi now seems to be working. The data is not correct, but it may be some wrong configuration on the SPI module. But for the Uart problem, any clue what could it be?

RE: Can I use NUS service without having the UART pins configured/connected?

Jorge — Wed, 10 Aug 2016 08:37:19 GMT

I intend to use the UART, but since it seems it was the problem, from the error code that it was giving me, I disabled all the prints. Will try to not initialize the Uart to see if it helps.

RE: Can I use NUS service without having the UART pins configured/connected?

Øyvind Karlsen — Tue, 09 Aug 2016 12:30:36 GMT

But why are you initializing UART if you are not intending to use it? You can just leave it out, and change the implementation in the nus_data_handler to not use the UART functions app_uart_put.

RE: Can I use NUS service without having the UART pins configured/connected?

Jorge — Tue, 09 Aug 2016 08:26:20 GMT

I think it has to do with the pins of the UART, or the UART configuration, because I can run the software on the dongle and DK, but not on my custom board, where the pins are not configured for UART. The strange part is that if I run the central side on it, it works, with the same pins configuration.

RE: Can I use NUS service without having the UART pins configured/connected?

Jorge — Tue, 09 Aug 2016 07:42:44 GMT

I was using the delay, because I needed the timers other place. And the delay was for print purposes, so i can delete it.

RE: Can I use NUS service without having the UART pins configured/connected?

Øyvind Karlsen — Tue, 09 Aug 2016 07:33:15 GMT

Hi,

You should not use nrf_delay_ms to delay, instead use a timer. Please see the application timer tutorial. nrf_delay uses a sequence of __nop to implement the delay. This means that the processor will be running and using a lot of current, additionally it will conflict with the SoftDevice which needs to be able to freely schedule its activities.

RE: Can I use NUS service without having the UART pins configured/connected?

Jorge — Tue, 09 Aug 2016 07:10:32 GMT

my main :

int main(void)
{
	bool erase_bonds;

    // Initialize.
	APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_OP_QUEUE_SIZE, false);
	
	init_all(erase_bonds);

and the init_all function:

static void init_all(bool bonds)
{
	uart_init();
	//printf("[MAIN : INIT] uart_init() -> ok\r\n");
	buttons_leds_init(&bonds);
	//printf("[MAIN : INIT] buttons_led_init() -> ok\r\n");
	ble_stack_init();
	//printf("[MAIN : INIT] ble_stack_init() -> ok\r\n");
	gap_params_init();
	//printf("[MAIN : INIT] gap_params_init() -> ok\r\n");
	conn_params_init();
	//printf("[MAIN : INIT] conn_params_init() -> ok \r\n");
	services_init();
	//printf("[MAIN : INIT] services_init() -> ok \r\n");
	advertising_init();
	//printf("[MAIN : INIT] advertising_init() - > ok\r\n");
	spi_init();
	//printf("[MAIN : INIT] spi_init() -> ok\r\n");
	nrf_delay_ms(500);
	//printf("[MAIN : INIT] Every module ok.\r\n");	
		
}

so the first initialization is the uart module. And I even comented all the printf from my software, because they were only for debug purposes.

RE: Can I use NUS service without having the UART pins configured/connected?

Pavan kumar — Mon, 08 Aug 2016 18:10:56 GMT

Generally This problem comes when you use any printf() or app_uart_put() before calling uart_init() one try to check is there any such statements either in main or in other source files

RE: Can I use NUS service without having the UART pins configured/connected?

Jorge — Mon, 08 Aug 2016 13:13:30 GMT

If you mean sending via BLE, I'm still not sending anything. Because my device don't even advertises. And if it is that data size I have set it to max of 20, but only sending 15 or less if connected.

I tried to comment all the printfs, but the problem remains the same. If I comment the uart initialization the program goes to that loop on the debug but appears with all the values = 0.

I have the one central and one peripheral side. The central side seems to be working well, but the peripheral goes to the app_error with the same configurations of pins, which I think it shouldn't happen.

RE: Can I use NUS service without having the UART pins configured/connected?

Martin — Mon, 08 Aug 2016 12:46:16 GMT

Hi this is somewhat confusing, as 0x0C would be NRF_ERROR_DATA_SIZE. How much data are you sending per package? AS far as I know the package may not exceed 23 Byte, having only 20Byte of payload and 3byte for header