Add ad7768 signal tests

Signed-off-by: Julia Pineda <[email protected]>
analogdevicesinc · Oct 2, 2023 · 643d4fb · 643d4fb
1 parent 0747304
commit 643d4fb
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Showing 2 changed files with 59 additions and 6 deletions.
diff --git a/+adi/+AD7768/Rx.m b/+adi/+AD7768/Rx.m
@@ -46,8 +46,8 @@
         Timeout = Inf
         kernelBuffersCount = 2
         dataTypeStr = 'int32'
-        phyDevName = 'ad7768'
-        devName = 'ad7768'
+        phyDevName = 'cf_axi_adc'
+        devName = 'cf_axi_adc'
     end
 
     properties (Nontunable, Hidden, Constant)

diff --git a/test/AD7768Tests.m b/test/AD7768Tests.m
@@ -1,11 +1,17 @@
 classdef AD7768Tests < HardwareTests
-
-    properties(TestParameter)
-    end
+
     properties
-        uri = 'ip:analog-2.local';
+        uri = 'ip:192.168.10.172';
         author = 'ADI';
     end
+
+    properties(TestParameter)
+        % start frequency. stop frequency, step, tolerance, repeats
+        signal_test = {{1000,100000,2500,0.015,1}};
+        sample_rate = {'256000', '128000', '64000', ...
+                     '32000', '16000', '8000', '4000', ...
+                     '2000', '1000'};
+    end
 
     methods(TestClassSetup)
         % Check hardware connected
@@ -14,6 +20,17 @@ function CheckForHardware(testCase)
             testCase.CheckDevice('ip',Device,testCase.uri(4:end),false);
         end
     end
+
+    methods (Static)
+        function freq = estFrequencyMax(data,fs)
+            nSamp = length(data);
+            FFTRxData  = fftshift(10*log10(abs(fft(data))));
+            df = fs/nSamp;  freqRangeRx = (0:df:fs/2-df).';
+            % Disregard DC 
+            [~,ind] = maxk(FFTRxData(end-length(freqRangeRx)+1:end,:),2);
+            freq = max(freqRangeRx(ind));
+        end
+    end
 
     methods (Test)
 
@@ -23,6 +40,42 @@ function testAD7768Smoke(testCase)
             adc.release();
             testCase.assertTrue(sum(abs(double(data)))>0);
         end
+
+        function testAD7768_Signal(testCase,signal_test)
+            % Signal source setup
+            m2k_class = instr_m2k();
+            m2k = m2k_class.connect(getenv('M2K_URI'), false);
+            siggen = m2k_class.create_instr(m2k, "siggen");
+            % ADC setup
+            adc = adi.AD7768.Rx;
+            adc.uri = testCase.uri;
+            adc.EnabledChannels = [1 2 3 4 5 6 7 8];
+
+            start = signal_test{1};
+            stop = signal_test{2};
+            step = signal_test{3};
+            tol = signal_test{4};
+            repeats = signal_test{5};
+            numints = round((stop-start)/step);
+            for ii = 1:repeats
+                ind = randi([0, numints]);
+                frequency = start+(step*ind);
+                m2k_class.control(siggen, 0, [frequency, 0.5, 0.5, 0]);
+                m2k_class.control(siggen, 1, [frequency, 0.5, 0.5, 0]);
+                for k = 1:5
+                    data = adc();
+                end
+                for ch = adc.EnabledChannels
+                    %FIXME: estFrequencyMax returns 'MATLAB:UndefinedFunction'
+                    freqEst = estFrequencyMax(double(data(ch)),str2double(adc.SampleRate));
+                    testCase.assertTrue(sum(abs(double(data(ch))))>0);
+                    testCase.verifyEqual(freqEst,frequency,'RelTol',tol,...
+                        'Frequency of signal unexpected')
+                end
+            end
+            adc.release();
+            m2k_class.contextClose();
+        end
 
     end