PTR5518 sd_softdevice_enable does not return

[jp]

Hi,

I developed an application on the nRF51 Dongle (PCA10031) and am now trying to port it to this module. It is a nRF51822 AA device (256K Flash, 16K RAM), and it is Rev.3 according to the results of nrf_ic_info_get. I am using Soft Device S130 Rev2.0.1 and SDK 12.3.0. I changed the memory map in the linker script to reflect the reduced memory (dongle has 32K RAM), and tried changing the clock accuracy to 250ms (from the standard 20ms). My ld script is as follows:

MEMORY {

FLASH (rx) : ORIGIN = 0x1b000, LENGTH = 0x25000

RAM (rwx) : ORIGIN = 0x20002000, LENGTH = 0x2000

}

I can step through the program but when it comes to sd_softdevice_enable call, it does not return.

Anyone have any ideas what might be wrong?

Thanks, John

[Nguyen Hoan Hoang]

Probably your board does not have the 32KHz crystal. Try initialize Softdevice with RC oscillator instead.

[jp]

Yes, thanks, that's it! All I found online was that the module had a less accurate crystal, not that it actually uses the internal oscillator. Working now!

[ssokol]

JP - I'm facing exactly the same issue you were. What did you do to get the board to use the RC oscillator?

[jp]

SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION, NULL);