I want to read analog voltage applied to pin on nrf52840. Please help

RE: I want to read analog voltage applied to pin on nrf52840. Please help

Jørgen Holmefjord — Thu, 13 Jul 2017 10:30:54 GMT

I'm not sure what this error means, looks like some Visual Studio/VisualGDB specific error. Why are you using Visual Studio? This is not supported by our SDK, and not something we recommend/support in general.

RE: I want to read analog voltage applied to pin on nrf52840. Please help

Arjit — Thu, 13 Jul 2017 08:27:14 GMT

Well, I rectified those errors by defining those identifiers in nrf_drv_timer.h But now I am getting

Severity	Code	Description	Project	File	Line	Suppression State
Error		Command-line action failed	EmbeddedProject1	D:\OnceAgain\EmbeddedProject1\EmbeddedProject1\VisualGDB	1	
Error		Build has failed. See the Output window for more details.	EmbeddedProject1	D:\OnceAgain\EmbeddedProject1\EmbeddedProject1\EXEC	1	
Error	MSB3073	The command ""C:\Program Files (x86)\Sysprogs\VisualGDB\\VisualGDB.exe" /build "D:\OnceAgain\EmbeddedProject1\EmbeddedProject1\EmbeddedProject1.vcxproj" "/solution:D:\OnceAgain\EmbeddedProject1\EmbeddedProject1.sln" "/config:Debug" "/platform:Win32"" exited with code 1.	EmbeddedProject1	C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.MakeFile.Targets	44

RE: I want to read analog voltage applied to pin on nrf52840. Please help

Jørgen Holmefjord — Thu, 13 Jul 2017 08:16:26 GMT

I don't see your errors here, but I got one on e-mail. 'TIMER_DEFAULT_CONFIG_FREQUENCY is not defined in nfr_drv_timer.h, it is only used here. This NRF_CONFIG macro should be defined in sdk_config.h. If you do not have the nrf_drv_timer part in your sdk_config.h file, you need to copy this from the full sdk_config.h file found in nRF5_SDK_13.0.0\config\sdk_config.h. You can also find the correct settings for SAADC example in nRF5_SDK_13.0.0\examples\peripheral\saadc\pca10056\blank\config\sdk_config.h.

RE: I want to read analog voltage applied to pin on nrf52840. Please help

Arjit — Thu, 13 Jul 2017 03:39:33 GMT

Command line-action failed Build has failed These are the errors I am getting

RE: I want to read analog voltage applied to pin on nrf52840. Please help

Jørgen Holmefjord — Tue, 11 Jul 2017 09:34:24 GMT

You can still look at the source files? What is the errors you are seeing?

To use the SAADC peripheral driver, you should only have to include the HAL and driver source files to your project, and add the path to the header files (found in same directory as source files) to your include paths:

[SDK_ROOT]\components\drivers_nrf\hal\nrf_saadc.c
[SDK_ROOT]\components\drivers_nrf\saadc\nrf_drv_saadc.c

In addition, you need to enable the peripheral in sdk_config.h, by setting:

#define SAADC_ENABLED 1

RE: I want to read analog voltage applied to pin on nrf52840. Please help

Arjit — Tue, 11 Jul 2017 05:35:58 GMT

I am working on Visual Studio. So I am unable to open the sample SAADC project.

RE: I want to read analog voltage applied to pin on nrf52840. Please help

Jørgen Holmefjord — Mon, 10 Jul 2017 11:28:42 GMT

It is no other way to read analog values than setting up the SAADC. Please post the errors you are facing, and I will try to help you get it working. Please also have a look at the SAADC example in our SDK, and these examples on GitHub about how to use the SAADC peripheral.