NRF52832 battery measure - ublox nina B112

[Miguel]

Sir,

I finally got success to measure the Coin Battery using a analog INPUT of NRF52832, AIN4

i am using ZEPHYR RTOS

I have to connect the BATTERY VDD to the AIN4.

My question, is there some mode using the saadc that you config to use the ADC to read the internal VDD and not the AIN4 ?

static const struct adc_channel_cfg m_1st_channel_cfg = {

    .gain = ADC_GAIN,

    .reference = ADC_REFERENCE,

    .acquisition_time = ADC_ACQUISITION_TIME,

    .channel_id = ADC_1ST_CHANNEL_ID,

#if defined(CONFIG_ADC_CONFIGURABLE_INPUTS)

    .input_positive = ADC_1ST_CHANNEL_INPUT,

#endif

};

Thanks!

[Karl Ylvisaker]

Hello,

My question, is there some mode using the saadc that you config to use the ADC to read the internal VDD and not the AIN4 ?

Yes, you can use the NRF_SAADC_INPUT_VDD option to have the SAADC sample the VDD bus internally.

Furthermore, I do not know what you wanted to show with the the configuration struct you have included, since you are using defines for all the parameters and not including their defined value I have no way of knowing what you are configuring here.
I would recommend using the HAL layer macros and defines when possible, such as for the ADC_GAIN parameter I would use one of the SAADC GAIN enumerations, preferably.

Please do not hesitate to ask if you should encounter any other issues or questions!

Best regards,
Karl

[Miguel]

All working now

thanks a lot!

[Karl Ylvisaker]

Miguel said:

All working now

Great, I am happy to hear that!

Please do not hesitate to open another ticket if you should encounter any issues or questions in the future.

Good luck with your development!

Best regards,
Karl