test: Add ad7768-1 signal tests

Signed-off-by: Julia Pineda <[email protected]>

test/AD7768_1Tests.m

@@ -1,30 +1,77 @@
 classdef AD7768_1Tests < HardwareTests
-
-    properties(TestParameter)
-    end
+
     properties
         uri = 'ip:analog';
         author = 'ADI';
     end
-
+
+    properties(TestParameter)
+        % start. stop, step, tolerance, repeats
+        signal_test = {{1000,125000,2500,0.015,10}};
+    end
+
     methods(TestClassSetup)
         % Check hardware connected
         function CheckForHardware(testCase)
             Device = @()adi.AD7768_1.Rx;
             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)
 
         function testAD7768_1Smoke(testCase)
             adc = adi.AD7768_1.Rx;
             adc.uri = testCase.uri;
-            data = adc();
+            [data,valid] = adc();
             adc.release();
+            testCase.assertTrue(valid);
             testCase.assertTrue(sum(abs(double(data)))>0);
         end
-
+
+        function testAD7768_1Signal(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_1.Rx;
+            adc.uri = testCase.uri;
+
+            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, 0]);
+                for k = 1:5
+                    [data,valid] = adc();
+                end
+                freqEst = testCase.estFrequencyMax(data,str2double(adc.SampleRate));
+                testCase.assertTrue(valid);
+                testCase.assertTrue(sum(abs(double(data)))>0);
+                testCase.verifyEqual(freqEst,frequency,'RelTol',tol,...
+                    'Frequency of signal unexpected')
+            end
+            adc.release();
+            m2k_class.contextClose();
+        end
+
     end
 
 end