ANT on PCA10056 and custom board ?

[RixtronixLAB]

Dear Members,

I want to run ANT+ code in my custom board,

It works well on PCA10056, I can upload softdevice and the code to custom board board,

but I didn't get any responses,

I have tried with code without softdevice, the custom board works well

Any ideas ?

Thanks

[Vidar Berg]

Hello,

Does your custom board have a 32KHz crystal mounted? If not, you have to make sure you select the internal RC oscillator when you enable the Softdevice. Otherwise, the Softdevice will enter an infinite loop waiting for the crystal to start.

The memory layout should be left as is.

Best regards,

Vidar

[RixtronixLAB]

Does softdevice require VDD HV? I connected VDD HV to 3.3V .

[RixtronixLAB]

Register value when it hit breakpoint

    ret_code_t err_code = nrf_sdh_enable_request();
      APP_ERROR_CHECK(err_code);

Looks like the CPU is inside never ending loop, because it can not find 32KHz Crystal ?

Any clues ? Is it 32KHz crystal issue ?

Thanks

[RixtronixLAB]

Can I manually turn on external both clocks ?

Code  : 

void clock_initialization()
{
    /* Start 16 MHz crystal oscillator */
    NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_HFCLKSTART    = 1;

    /* Wait for the external oscillator to start up */
    while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0)
    {
        // Do nothing.
    }

    /* Start low frequency crystal oscillator for app_timer(used by bsp)*/
    NRF_CLOCK->LFCLKSRC            = (CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos);
    NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_LFCLKSTART    = 1;

    while (NRF_CLOCK->EVENTS_LFCLKSTARTED == 0)
    {
        // Do nothing.
    }
}	 

[RixtronixLAB]

Any clues ? thanks

[Vidar Berg]

You can run the snippet you posted above at the start of main() to check if the HF and LF clock will start up.

[RixtronixLAB]

void clock_initialization()
{
    /* Start 16 MHz crystal oscillator */
    
    NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_HFCLKSTART    = 1;
    
    //CLOCK_HFCLKSTAT_SRC_Xtal

    /* Wait for the external oscillator to start up */
   /*
     while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0)
    {
         __WFE();
    }
  */
    nrf_delay_ms(500);
    /* Start low frequency crystal oscillator for app_timer(used by bsp)*/
    NRF_CLOCK->LFCLKSRC            = (CLOCK_LFCLKSRC_SRC_Xtal << CLOCK_LFCLKSRC_SRC_Pos);
    NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_LFCLKSTART    = 1;
    
  /*
    while (NRF_CLOCK->EVENTS_LFCLKSTARTED == 0)
    {
       __WFE();
    }
    */
}    

I can run that snippet,

but only RC clock are running

screen shot on register LFCLKSTAT and HFCLKSTAT

Will it work with softdevice ?

I'm not using softdevice now...

use this snippet then softdevice init ? is that possible ?

[Vidar Berg]

Thanks, so this confirms that the 32MHz crystal is not starting up.This means the Softdevice won't work either.

What crystal are you using in your design?

[RixtronixLAB]

I bought that crystal from aliexpress, the one from nRF, I can't find in stock, any suggestions for other crystal, mouser or digikey link ?