Why there is no easy API for analog input of nRF52 (SAADC)?

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

ovrebekk — Wed, 07 Nov 2018 12:30:42 GMT

OK, I see what you mean.

In the future we are going to base the low lever drivers on the nrfx module. The API's are essentially the same, but all the functions will have the "nrfx" prefix, rather than the "nrf" prefix.

Best regards
Torbjørn

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

Tarak — Tue, 06 Nov 2018 14:40:09 GMT

It's okay thank you i found them. But since it's not always easy to find the functions you use in your example in the newer SDKs so i was asking about their new names.

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

ovrebekk — Tue, 06 Nov 2018 12:41:20 GMT

I am not quite sure I understand the question. nrf_drv_saadc_sample(), and the other SAADC function calls, are documented on the infocenter.

Could you elaborate on what you mean by "replacement functions" ?

Best regards
Torbjørn

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

Tarak — Mon, 05 Nov 2018 16:05:23 GMT

Hi, Ovrebekk , thank you for your version of the SAADC Sample example but just wanted to ask : since i'm working on the SDK 14.0, is there a document where the replacement functions as "nrf_drv_saadc_sample( )" are listed. Thank you !

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

MikeLemon — Sat, 04 Nov 2017 12:38:05 GMT

Hi, I came from the future and would just like to ask if maybe you have the source code of the main.c file or the same project for the SES IDE?

Thanks.

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

Fabien Comte — Sun, 09 Jul 2017 20:11:54 GMT

It's not a problem of readable but how long you have to search for it...

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

Fabien Comte — Sun, 09 Jul 2017 20:10:18 GMT

Hello, I agree with them. For creating a fast proof of concept, SDK is not as fast as Arduino way...

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

Remo — Sun, 26 Feb 2017 09:33:43 GMT

Hi Jarmo. I had the same problem. I comes from the Pic MCU world. And in this compiler i need 3 lines to get an ADC Result. My problem is, i get no result, i cant read the analog value. I use also an example with hunderts of lines source for the ADC read :-) You have an solution meanwhile? Best Regards Remo

devzone.nordicsemi.com/.../

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

tahse — Thu, 23 Feb 2017 16:21:07 GMT

Torbjørn, I found an answer on a different thread. For some reason an NRF_LOG_FLUSH(); in the main while loop does the trick. Any idea why?

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

tahse — Thu, 23 Feb 2017 15:25:41 GMT

Torbjørn, Thank you for the saadc_simpler example above. The code was what I was looking for. However, when I compiled and ran the original saadc example the RTT output worked after setting the flag in sdk_config.h. Doing the same thing with the saadc_simpler example gives no RTT output on J-Link RTT Viewer. (RTT Viewer does connect)

Any thoughts on what I am missing?

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

ovrebekk — Thu, 15 Dec 2016 14:49:26 GMT

Good point Jarmo, the nrf_drv_saadc_sample_convert function makes it even simpler ;) My own secret dream is to re-implement everything in C++, but I don't think we are there yet... :)

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

Jarmo — Sun, 11 Dec 2016 11:27:21 GMT

Thank you! That was relatively understandable, yes. My solution uses nrf_drv_saadc_sample_convert(CHANNEL, &val) instead of *_buffer_convert() -function. So it is maybe still a single function call simpler than your example, eh?

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

Jarmo — Sun, 11 Dec 2016 11:20:56 GMT

Thanks! Looks readable :)

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

Jon Helge — Sat, 10 Dec 2016 20:36:02 GMT

The register interface is quite simple to use directly.

Here's an example github.com/.../main.c

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

ovrebekk — Fri, 09 Dec 2016 15:36:58 GMT

Hi Jarmo

Thanks for your feedback. I agree calling this a "simple" example is a bit misleading. The idea behind the example is good in my opinion; to illustrate how you can use the PPI and a timer to achieve very efficient and reliable ADC sampling, but this is definitely not the easiest way to use the SAADC peripheral.

I had a crack at making a simpler example, which you can download here: saadc_simpler.zip

It's still close to a 100 lines, with comments and all, but it should be considerably easier to follow the flow of the program.

If you are still having issues with your code feel free to attach it here, and I will have a look at it.

Best regards
Torbjørn

RE: Why there is no easy API for analog input of nRF52 (SAADC)?

Jarmo — Mon, 05 Dec 2016 15:14:40 GMT

And then you call it "SAADC HAL simple example." - Don't want to see your complex eamples, really.