ADC Conversion using 4096Hz for nRF52832 Chip?

[vishal]

Hello Sir,

We are using nRF52832 chip and Softdevice is S132. Is it possible to sample an analog signal using internal ADC conversion using 4096Hz?. Its look like it does at 3900Hz.

Thanks in Advance..

[Jørgen Holmefjord]

Are you using the correct softdevice/SDK version for the example? Have you tried debugging, to see if any function calls return error codes?

[vishal]

Yes i debugging my code and it return error code is 133 can you tell me what is meaning of this error code. This error is in static void lfclk_config(void) function. I am using sdk 13.1 and soft device is S132 for nRF52832 using eclipse IDE. can you suggest me what should i do.. Thanks...for your quick reply.

[Jørgen Holmefjord]

Make sure you are not using RTC0, as this is used by the softdevice. You can chose which RTC is enabled in sdk_config.h. You do not need to initialize the lfclock when using the softdevice, as the softdevice already handles this.

[vishal]

I check in my sdk_config.h RTC0 is not enable RTC2 is enabled, now when i remove lfclk_config(void) function device is advertising and also connect with my phone. But when i sent command for start saadc my ADC value is not received in my apps, means no any data sent from nordic to UART. As per you refer me this above example in this no any PPI channel use. Can you tell me how i trigger PPI on RTC. In my code i use saadc_sampling_event_enable(); in main. my application is read 3-axis accelerator analog value one by one channel. Thanks sir......

[vishal]

Hi sir, Can you tell me how i trigger sample though ppi on RTC. In my last program i am triggering sample through PPI on Timer peripheral. Where i need to changes in saadc_sampling_event_init(void) function for controlling PPI on RTC. Thanks......