PCA10005 GPIO: unable to drive a high voltage level.

[NK]

Hi,

I have the following code running on NRF51822:

int main(void)
{
    // Configure GPIO 08 (P1.0) as output.

  nrf_gpio_cfg_output(8);
   // Set HI on GPIO 08(P1.0)
   nrf_gpio_pin_set(8);

...
}

However, when I check the voltage at pin 29 of connector P1 on the PCA10005 board (which I believe corresponds to GPIO 08) using a multimeter, I find that it reads 0V. What should I be expecting & is there any additional configuration required in order to drive a HI (3.3V) on GPIO pins.

Regards, NK

[NK]

At the end, it turned out to be a grounding issue - I was using the DK without the NRFGO motherboard & hence had to hook up the VCC & GND manually. The GND connection was not perfect due to which the LED was not lighting up.

[Petter Myhre]

Thank you for answering your own question.