GPIO interrupt example

[Andreas]

I'm using the nRF51822 Beacon with S110 and the example ble_app_beacon as basic programm. I'm a newbie with the beacon, so maybe I have problem with the basics in programming it.

I configures pin 0 as input. Now I want to read this input and with every toggle I want to start a timer. When the timer expired I want to count a variable + 1.

I tried it with a simple nrf_gpio_pin_read(); in the main function, but it doesn't work. I see that with sd_app_evt_wait(); the beacon will go into a sleep mode and is waiting for a new event. So I have to put the timer reset into an interrupthandler, that is called when the input toggles. But I don't understand what i have to do. I found many questions (and answers) to that subject, but there so many flags, defines and funcion-calls that I do not understand.

Can someone give me a simple example how to configure the pin and its interrupthandler?

[Jørgen Holmefjord]

Hi Andreas,

There is a Pin Change Interrupt example in the SDK. This use the GPIOTE driver, but it is also possible to GPIO sensing to wake up from sleep. It should not be too hard to change this example to start a timer on the toggle of the input and increment your variable in the timer callback handler.

Best regards,

Jørgen

[Jørgen Holmefjord]

Yes, unless you configure the pin in a way that it will constantly generate interrupts, the chip can enter sleep mode.

[sachin.singh]

Hi, 

I am working on the same and I need to developing code using "pin_change_int" as reference to develop the interrupt based event and calling the function assign to it.

Can please me sample code to get the better clarification.

And one more thing that I am concern about that does it support sleep mode or not, because I am looking for the sleep after works get completed.

Looking for the kind support and help ...

Thanks