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Getting Started Generating Data with Digilent® Analog Discovery™

This example shows how to generate analog output voltage data (at a rate of 300kHz). The output voltage-range of the outgoing signal is -5.0 to +5.0 volts. You will use the session-based interface with Digilent Analog Discovery hardware.

Create a session with a Digilent device

Discover Digilent devices connected to your system using daq.getDevices and create a session using the listed Digilent device.

s = daq.createSession('digilent')
s = 

Data acquisition session using Digilent Inc. hardware:
   Will run for 1 second (10000 scans) at 10000 scans/second.
   No channels have been added.
   

Add an analog output channel

Add an analog output channel with device ID AD1 and channel ID 1. Set the measurement type to Voltage.

ch = s.addAnalogOutputChannel('AD1', 1, 'Voltage')
ch = 

Data acquisition analog output voltage channel '1' on device 'AD1':

 TerminalConfig: SingleEnded
          Range: -5.0 to +5.0 Volts
           Name: ''
             ID: '1'
         Device: [1x1 daq.di.DeviceInfo]
MeasurementType: 'Voltage'


Generate a single sample

Generate a single scan on-demand.

outVal = 2;
s.outputSingleScan(outVal);

Set session and channel properties

Set the generation rate to 300kHz.

rate = 300e3;
s.Rate = rate;

Define the output waveform

Generate a 10 Hz sine-wave for half a second. The length of the output waveform and the specified output rate define the duration of the waveform.

f = 10;
duration = 0.5;
t = (1:(duration*rate))/rate;
output = sin(2*pi*f*t)';

Generate continuous data

Queue some data and start a clocked foreground generation.

s.queueOutputData(output);
s.startForeground;
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