Not able to run BLE when i configure any pin as input pin with PULLUP/PULLDOWN.

[Rajat]

Hi Everyone

I have the following issue in my application code.

If i configure a pin as an input pin , i am not able to run the ble init function in which it advertises.

If i comment out the input pin configuration, i am able to run the ble part of program and it sends data successfully to the nrfconnect App.

Here is the code that i am using,.

Am i using the correct method to configure the pin as an input pin.(nrf_gpio_cfg_input(1,NRF_GPIO_PIN_PULLDOWN)) ?

If not ,then what is the proper way to perform this action.

Thanks

Rajat!

int main(void)
{

nrf_gpio_cfg_input(1, NRF_GPIO_PIN_PULLDOWN);
ble_init();
while(1)
{
ble_send("hello");   /*This works perfectly if i comment the nrf_gpio_cfg_input line*/
}
}

[Balaji Srinivasan]

I am assuming you are using the nRF52840 Preview Development kit. 

Refer http://infocenter.nordicsemi.com/pdf/nRF52840_PDK_User_Guide_v1.0.pdf

On the nRF52840 Preview DK board, P0.00 and P0.01 are by default used for the 32.768 kHz crystal and are not available as GPIO on the connectors.

If P0.00 and P0.01 are needed as normal I/Os, the 32.768 kHz crystal can be disconnected and the GPIO routed to the connectors. Cut the shorting track on SB1 and SB2, and solder SB3 and SB4. See the figure below for reference.

So I suggest you use a different pin.