Best place to get started

[sd]

Hello everyone.

I've got the nRF51822 Evaluation Kit and Dongle. The heartbeat demo is working, so I got the toolchain -- Nordic, Keil, Segger under Win7 -- set up correctly, as far as I can tell.

I need to interface with an I2C/TWI device as one of my peripherals, and was wondering what is the best way to start a new project, and if there's a template that I could use that will do much of the required setup (SoftDevice, initialisation, etc.) for me. Or do most people simply start off with the example code and build on top of that?

Finally, is there a "getting started" guide anywhere? I couldn't find one on the Nordic website.

Thanks!

[Wobs]

Hi,

I'm using the attached, modified, SoftDevice compatible TWI code with the BLE heart rate example for the pca10001. I initialize the TWI master like in this order:

int main(void)
{
    uint32_t err_code;

    timers_init();
    gpiote_init();
    buttons_init();
	
    // Initialize TWI
    twi_master_init();

and the code fails at the asserts and forces a system reset...

    /*
    NRF_PPI->CH[0].EEP = (uint32_t)&NRF_TWI1->EVENTS_BB;
    NRF_PPI->CH[0].TEP = (uint32_t)&NRF_TWI1->TASKS_SUSPEND;
    NRF_PPI->CHENCLR = PPI_CHENCLR_CH0_Msk;*/
    err_code = sd_ppi_channel_assign(0,
                                     &(NRF_TWI1->EVENTS_BB),
                                     &(NRF_TWI1->TASKS_SUSPEND));
    ASSERT(err_code == NRF_SUCCESS);

What is the problem here, shall I initialize the TWI in a different order?

[sd]

Are you using the SoftDevice? If so, use the code Håkon attached above. It worked for me!

[Wobs]

right, the problem was something else I believe, now it works, thanks!

[Chocol8]

Hello, I have faced the same problem. And code forces a system reset which starts the whole initialization from the begin. What changes you have made to prevent this?