How to change an ADC channel to another

alejandrogarcia — Thu, 06 Dec 2012 18:05:56 GMT

How to change an ADC channel to another, I'm using two ADC channels, one differential and one common mode, with Processor Expert

//CHANNEL 0:

//--------------------------------------------

clrReg32Bits(PORTE_PCR22, 0x01000700U);

ADC_TP = ADC1_CreateSampleGroup(ADC1_DeviceData,1,1U);

ADC_TP = ADC1_StartSingleMeasurement(ADC1_DeviceData);

while(!ADC1_GetMeasurementCompleteStatus(ADC1_DeviceData));

ADC_TP = ADC1_GetMeasuredValues(ADC1_DeviceData,&adc_buffer);

adc_result =(uint16_t)adc_buffer;

if(adc_result < 0x8000){adc_result = 0;

}else{adc_result -= 0x8000;}

Temp_hambiente = (adc_result * 0.000036621);

Temp_hambiente -= 0.424;

Temp_hambiente = (Temp_hambiente / 0.00625);

//CHANNEL 1:

//--------------------------------------------

clrReg32Bits(PORTE_PCR20, 0x01000700U); /* MUX=0x00U */

clrReg32Bits(PORTE_PCR21, 0x01000700U); /* MUX=0x00U */

ADC_TP = ADC1_CreateSampleGroup(ADC1_DeviceData,0,1U);

ADC_TP = ADC1_StartSingleMeasurement(ADC1_DeviceData);

while(!ADC1_GetMeasurementCompleteStatus(ADC1_DeviceData));

ADC_TP = ADC1_GetMeasuredValues(ADC1_DeviceData,&adc_buffer);

adc_result =(uint16_t)adc_buffer;

Re: How to change an ADC channel to another

Petr_H — Mon, 10 Dec 2012 08:51:54 GMT

Hello,

Could you please post more details on which MCU do you use and which ADC channels do you use?

A sample project or a .pe file with components settings would be helpful.

best regards

Petr Hradsky

Processor Expert Support Team