This is about sdk

[mahone]

Recently I open the sdk of the nrf51422,there are some functions that indicate that they are come from the document call 'ant_interface.h'.But when I try to go to the definition of it,I find there are not such a '.c' document.That bothers me.Can anybody tell me where is it? Thx.

[Hung Bui]

@Mahone: I got a small mistake in the above reply it's S210 not S120.

0x20000 is just an example of a 128kB softdevice. You need to actually look for the size of the softdevice to find where the application should start.

Could you let me know your nRF51422 full laser mark ? If you have nRF51422 version 1 you will have your softdevice hard coded and you don't need to worry about that.

If you have nRF51422 version 2 you will have to download the S210 softdevice and flash to the chip.

Depend on which S210 version you will have different sizes, S210 v1.0 has 40kB size and the application should start at 0xA000, S210 v1.2 has 48kB and the application should start at 0xC000 You can find this in the softdevice specification.

Could you please check if you have the 32kHz crystal ? (beside the 16MHz crystal) . If you don't have 32kHz crystal, you should call sd_softdevice_enable with NRF_CLOCK_LFCLKSRC_RC_250_PPM_2000MS_CALIBRATION instead of NRF_CLOCK_LFCLKSRC_XTAL_50_PPM

[mahone]

Hung Bui,

It's nRF51422QFAACO1319AJ.I check that there don't have the 32kHz crystal.By looking at what you said ,I start to wonder is there other places difference between the two version?Can you mension some other things that I should notice?

[mahone]

Hung Bui,

Thank you for your advice.I change NRF_CLOCK_LFCLKSRC_XTAL_50_PPM with NRF_CLOCK_LFCLKSRC_RC_250_PPM,and it works!But still,I can't figure the version of my chip.By the way, my keil's target option is 0xA000.Could it be wrong?

[Hung Bui]

@Mahone: You have C0 version, which is revision 1 (XLR) . The softdevice is hardcoded on the chip and is S210 v1.0 and the start address at 0xA000 is correct. You can find the softdevice name and version of the chip in nRFGo Studio.