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]

Hi Mahome,

There is no ant_interface.c because ant_interface.h is only the header file to declare the SVCalls (APIs) functions that the S210 stack (softdevice) provides. The application code interface with the stack via these APIs and Events.

The stack is pre-compiled therefore you would not be able to find the source code of those functions.

[mahone]

Thanks for you reply,but I still confuse about this things cause I found that when I download the sample ant_broadcast_tx to nrf51422,there is something wrong about the code " err_code = sd_softdevice_enable(NRF_CLOCK_LFCLKSRC_XTAL_50_PPM, softdevice_assert_callback); ".The program stuck at this line and I don't know where goes wrong.

[Hung Bui]

Mahone,

Have you make sure you have the S120 softdevice programmed ? If you add a break point after the call, which err_code you receive or it just can't never go through the line ? Also please check your target option to make sure IROM1 starts at 0xC000

Which hardware are you testing ? Is it our dev/ev kit or your custom board ? Please verify that you have the 32kHz crystal connected.

[mahone]

Hung Bui,

I use the nrf51422 device just for 1 month,so I don't really know how to have S120 softdevice programmed.Can you tell me what is it?Maybe I happened to do so. In the nRF51422_DK_UG_v2.0,it said I should change IROM1 starts at 0x20000,and the Size is 0x20000.IRAM10x20002000 the Size is 0x2000.Or can I say that the picture just set a example and it should starts at what you said? I test a custom board,the chip shows it's NRF51422QFAA.I check the introduction of the custom board,there are seems to have a 16kHz crystal .

[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