BLE not visible after adding nrf_gpio and twi functions

[Alanarf]

Hi all, 

I am merging TWI code with BLE.  I started with the ble_app_uart example working perfectly, however, after adding TWI libs and drivers (nrf_twi; nrf_twim; twi_master), and a simple function to blink a led using gpio, the BLE device is not visible anymore. Any help please? 

My code is exactly the ble_app_uart + twi drivers + leds_init function, My leds_init function is bellow.

void leds_init(void)
{
     nrf_gpio_cfg_output(LED_PIN);

	//Turn on the LED to indicate initializing
	
	nrf_gpio_pin_clear(LED_PIN);
	nrf_delay_ms(500);
	// this will switch led on
	nrf_gpio_pin_set(LED_PIN);
	nrf_delay_ms(500);
	// this will switch  led off
	nrf_gpio_pin_clear(LED_PIN);
	nrf_delay_ms(500);
}

Thanks

[Amanda Hsieh]

Hi, 

Will the problem disappear if you remove the nrf_delay(500ms)? If it doesn't work, please enable logging and post the debug log as well. 

-Amanda H.

[Alanarf]

Hi Amanda, thanks for reply.

I removed nrf_delay and the same happened, but now the led keep blinking in infinite loop. ( 2 seconds turned on and one turned off)

I took a fresh ble_app_uart example from sdk 16, and just add the led_init function above.

Note:  i am uploading this code to a custom board, LED_PIN is pin 11. The code works on DK (PCA10040) nRF52832, but not in my board

[Amanda Hsieh]

Hi, 

Do you have an external LF crystal on the custom board or not?

-Amanda H. 

[Alanarf]

Hi, yes i do.
One 32.7 KHz and another of 32 MHz.

The schematic is quite the same as bellow

[Amanda Hsieh]

Hi Alanarf,

Alanarf said:

Note:  i am uploading this code to a custom board, LED_PIN is pin 11. The code works on DK (PCA10040) nRF52832, but not in my board

 

You probably have to change the pin which is used as a LED in the default example from the SDK. The DK uses P0.17 for LED1, so if you are just flashing the default example but has connected his LED to pin 11. well, then it won't work. You have to map the pins in the pca10040.h accordingly to the custom board. 

In the ble_app_uart example, it uses bsp_board_leds_init to initiate LEDs. You can take a look at the bsp_board_leds_init function. 

-Amanda H.