Class: ADCDACPi

ADCDACPi

This class contains methods for use with the ADC DAC Pi and ADC DAC Pi Zero from https://www.abelectronics.co.uk/p/74/adc-dac-pi-zero-raspberry-pi-adc-and-dac-expansion-board

Methods:

ReadADCVoltage(byte channel)

Read the voltage from the selected channel on the ADC
Parameters: channel - 1 or 2
Returns: number as double between 0 and 3.3

ReadADCRaw(byte channel)

Read the raw value from the selected channel on the ADC
Parameters: channel - 1 or 2
Returns: Integer

SetDACVoltage(byte channel, double voltage)

Set the voltage for the selected channel on the DAC
Parameters: channel - 1 or 2, voltage can be between 0 and 2.047 volts
Returns: null

SetDACRaw(byte channel, int value)

Set the raw value from the selected channel on the DAC
Parameters: channel - 1 or 2,value int between 0 and 4095
Returns: null

Properties:

double ADCReferenceVoltage {get; set;}

Gets or sets the reference voltage for the analogue to digital converter.
The ADC uses the raspberry pi 3.3V power as a reference so using this property to set the reference to match the exact output voltage from the 3.3V regulator will increase the accuracy of the ADC readings.

byte DACGain {get; set;}

Gets or Sets the gain for the DAC.
When gain = 1 the voltage range will be 0V to 2.047V
When gain = 2 the voltage range will be 0V to VCC which is typically 3.3V on a Raspberry Pi.

Usage

To use the ADCDACPi library in your code you must first import the library dll:

using ABElectronicsUK;

Next you must initialise the ADCDACPi class:

ABElectronicsUK.ADCDACPi adcdac = new ABElectronicsUK.ADCDACPi();

Next we need to connect to the device and wait for the connection

adcdac.Connect();

while (!adcdac.IsConnected){}

Set the reference voltage.

ADCReferenceVoltage = 3.3;

Read the voltage from channel 2

double value = adcdac.ReadADCVoltage(2);

Set the DAC voltage on channel 2 to 1.5 volts

adcdac.SetDACVoltage(2, 1.5);