SAADC output values on UART

[kanika1008]

Hi,

I want monitor the battery voltage of my system, I used the SAADC examples on GitHub for SDK 13.0 (https://github.com/NordicPlayground/nRF52-ADC-examples/tree/master/saadc_low_power). The code compiles and I can see the LEDs flashing according to described function. However, I do not see any analog "value" of AIN0. There is no change whether I pt the pin to VDD or GND. I have checked the code quite thoroughly and nothing prints a hex or dec value of the AIN pin to the UART. I do not know what I am measuring! 

I would appreciate any help in this regard. DO I need to change anything?

Best

Kanika

[Kenneth]

Hi,

AIN0 refer to P0.02, are you sure you have connect correct pin?

Have you tried the nRF5 SDK example instead:
http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/nrf_dev_saadc_example.html?cp=4_0_0_4_5_33 

Best regards,
Kenneth

[kanika1008]

Hi Kenneth,

Yes I am connected to the right pin. I am using the nRF52 DK.

I also tried to use the example you suggested. I have the same issue there: I see nothing printed out. I am using the Seggar JLink for debugging. What I am seeing is that all NRF_LOG commands are not being written while Seggar_Write commands do write. So I checked the sdk_config.h. In there I tried to enable ( 0-->1) the following:

NRFX_SAADC_CONFIG_LOG_ENABLED 1

NRFX_UARTE_CONFIG_LOG_ENABLED 1

NRFX_UART_CONFIG_LOG_ENABLED 1

However, I see no change  and do see anything on the real time debugger......