Reading and writing to GPIO pins from a sample Zephyr project

Question

I looked at Blinky, but I am still not sure how to access the GPIO pins. In Blinky, there is an led0 alias, but what about other pins? What are there aliases? 
 
 Specifically, this is what I need to do. 
 
 1. I need to read from P0.03, I was told this could handle analog to digital convertesion, because I have analog output going to this pin. 
 
 2. I need to write to P0.27 and P0.26 
 
 Any help would be appreciated.

Charlie · Accepted Answer

Hi, some suggestions for your needs: 
 
 1. I need to read from P0.03, I was told this could handle analog to digital conversion because I have analog output going to this pin. 
 
 According to the latest nRF52833 Product Specification v1.3 , nRF52832 supports 8 ADC channels, P0.03 can be used as AIN1. You are also free to use other ADC channels. This page provides a good example of how to read the analog output based on Zephyr. 
 
 2. I need to write to P0.27 and P0.26 
 
 You can use device name alias and of course the real device name. For example, P0.27 come from "GPIO_0" port and with pin number "27", so some functions look like this: 
 dev = device_get_binding("GPIO_0");
......
gpio_pin_configure(dev, 27, GPIO_OUTPUT); 
......
while (1)
{

	gpio_pin_toggle(dev, 27);
	k_sleep(K_SECONDS(1));
}

Reading and writing to GPIO pins from a sample Zephyr project

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