Disabling saadc problem

RE: Disabling saadc problem

Jørgen Holmefjord — Tue, 30 Jan 2018 09:37:39 GMT

0x08 means NRF_ERROR_INVALID_STATE. If you get this from the init function, the SAADC driver is already initialized. You should use a flag that you set when init is called and clared after uninit, to keep track of the state. Another thing is that you can't call uninit right after calling the sample function, as this will uninit the driver before sampling is completed. You need to move the uninit function to the SAADC callback.

RE: Disabling saadc problem

asombredance — Tue, 30 Jan 2018 09:20:55 GMT

I used debugging method, the error code is 0x00000008 for err_code = nrf_drv_saadc_init(NULL, saadc_event_handler).

RE: Disabling saadc problem

Jørgen Holmefjord — Tue, 30 Jan 2018 08:28:24 GMT

You need to check the error codes. Use the method I linked above, and make sure you check the error code from all function calls:

ret_code_t err_code;
err_code = nrf_drv_saadc_init(NULL, saadc_event_handler);
APP_ERROR_CHECK(err_code);

RE: Disabling saadc problem

asombredance — Tue, 30 Jan 2018 08:26:10 GMT

At the beginning I called nrf_drv_saadc_init(NULL, saadc_event_handler) when I was doing configuration in the main. In this question you said "Most likely you get an error code because you are trying to initialize a module that is allready initialized ", so I tried to make it pass initializing part for the first time handler runs.

RE: Disabling saadc problem

Jørgen Holmefjord — Tue, 30 Jan 2018 08:16:15 GMT

Hi,

I'm not sure I understand your code. If you uninit the SAADC driver after sampling, you need to init it again before next sample. What is your i=0;, if(i!=0) and i=1; code suppose to do?

Most likely you are trying to call nrf_drv_saadc_sample when the SAADC driver is not initialized, which will return an error code. When you pass a non-zero error code to APP_ERROR_CHECK, the default recovery method is to reset the chip. Please use this debugging method to check the returned error codes in your application.

Best regards,

Jørgen