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The question about using ADC on CC2531 for battery measurement

wun martin
Expert 1585 points

Hi 

I am using CC2531 USB Dongle , and the software is SampleRemote project.

The goal is like the following :

1.  I want to read the voltage of power on CC2531 by using ADC.

2.  I give the extra voltage on P0_2 by power supply unit , and the extra voltage on P0_2 is change from 1V to 2.5V.

I have add the code like the following in the zll_sampleremote-CC2531EMK.c and  in the end of zllSampleRemote_Init:

uint16 adc_ain2=0;
uint16 adc_battery = 0;
/*********************************************************************
* @fn zllSampleRemote_Init
              ...
APCFG |= 0x04;
HalAdcSetReference(HAL_ADC_REF_125V);
adc_ain2=HalAdcRead(HAL_ADC_CHN_AIN2,HAL_ADC_RESOLUTION_10);
adc_battery = HalAdcRead(HAL_ADC_CHN_VDD3, HAL_ADC_RESOLUTION_10);

} //zllSampleRemote_Init End

The input voltage on P0_2 and the power supply of CC2531 is 1.2V and 3V. And the value of  adc_ain2 and adc_battery is 511 and 447 respectively.

Q1 : I am not sure it only read once or real time , because the code is in zllSampleRemote_Init.

Where should I put the code and then I can read the value of adc_battery and  adc_ain2 in real time when I change the input voltage of P0_2 ?

Q2 : If the code can read the voltage in real time , where can I see the value of adc_ain2 and adc_battery in real time ? (Does "Debug without Downloading" can monitor the value in real time ??)

Thanks