Assigning a functional block to a GPIO

[sd]

I'm confused about how to assign a functional block's I/O (TWI in my case) to a particular pin on the device. Is there a worked and documented example? Is there a relevant application note?

[sd]

Hi again. Since I've used the template design as, well, my template, I had all the following init calls intact:

    // Initialize
    leds_init();
    timers_init();
    gpiote_init();
    buttons_init();
    ble_stack_init();
    scheduler_init();
    gap_params_init();
    advertising_init();
    services_init();
    conn_params_init();
    sec_params_init();
    
    // Start execution
    timers_start();
    advertising_start();

That caused the twi_init() call to hang. However, if I comment out some of these calls, like so:

    // Initialize
    leds_init();
    timers_init();
    gpiote_init();
    buttons_init();
//    ble_stack_init();
    scheduler_init();
//    gap_params_init();
//    advertising_init();
    services_init();
//    conn_params_init();
    sec_params_init();
    
    // Start execution
    timers_start();
//    advertising_start();

I see the clock running on the TWI SCK pin! Any hints on why this happens on how to resolve these potential conflicts? Thanks!

[Ole Morten]

This sounds like you're not using the softdevice functions for manipulating the PPI. Please see this answer: https://devzone.nordicsemi.com/index.php/twi-on-nrf51822#reply-239