From f99a9df8c38f0a64fc60e86cf003c4f3f1bfb4d4 Mon Sep 17 00:00:00 2001
From: Julia Pineda <Julia.Pineda@analog.com>
Date: Mon, 18 Mar 2024 15:59:03 +0800
Subject: [PATCH] TEST: Add ad4630-24 signal tests

Signed-off-by: Julia Pineda <Julia.Pineda@analog.com>
---
 test/AD4630_24Tests.m | 92 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 90 insertions(+), 2 deletions(-)

diff --git a/test/AD4630_24Tests.m b/test/AD4630_24Tests.m
index 0ff7ff2..cc8775f 100644
--- a/test/AD4630_24Tests.m
+++ b/test/AD4630_24Tests.m
@@ -1,11 +1,15 @@
 classdef AD4630_24Tests < HardwareTests
     
     properties
-        uri = 'ip:analog-2.local';
+        uri = 'ip:192.168.10.171';
         author = 'ADI';
     end
 
     properties(TestParameter)
+        % start frequency, stop frequency, step, tolerance, repeats
+        signal_test = {{10000,250000,2500,0.05,10}};
+        signal_vpp = {0.1, 0.3, 0.5};
+
         sample_rate = {'10000', '50000', '100000', ...
             '200000', '500000', '1000000', ...
             '1760000', '2000000'};
@@ -23,6 +27,17 @@ 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)
         
@@ -63,7 +78,80 @@ function testAD4630_24AttrSampleAveragingLength(testCase,sample_averaging_length
             testCase.assertTrue(sum(abs(double(data)))>0);
             testCase.assertTrue(strcmp(val,string(ret_val)));
         end
-        
+
+        function testAD4630_24DifferentialInputRMS(testCase,signal_vpp)
+            % 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.AD4630_24.Rx('uri',testCase.uri);
+            fs = str2double(adc.SampleRate);
+
+            % Set channel 1 to 50KHz, 500mHz and minimize channel 2 amplitude
+            signal_frequency = 5e4;
+            m2k_class.control(siggen, 0, [signal_frequency, signal_vpp, 0, 0]);
+            m2k_class.control(siggen, 1, [signal_frequency, 0.000001, 0, 0]);
+            for k = 1:5
+                [data,valid] = adc();
+            end
+            data = double(data);
+            % Generate same signal in channel 2 to double signal at differential inputs
+            m2k_class.control(siggen, 1, [signal_frequency, signal_vpp, 0, 0]);
+            for k = 1:5
+                [data1,valid1] = adc();
+            end
+            data1 = double(data1);
+
+            % Clean up
+            adc.release();
+            m2k_class.contextClose();
+
+            % Assertions
+            testCase.assertTrue(valid & valid1);
+            testCase.verifyEqual(rms(data1),rms(data)*2,'RelTol',0.3)
+        end
+
+        function testAD4630_24DifferentialInputSweep(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.AD4630_24.Rx('uri',testCase.uri);
+            adc.EnabledChannels = [1,2];
+            fs = str2double(adc.SampleRate);
+
+            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]);
+                m2k_class.control(siggen, 1, [frequency, 0.5, 0, 0]);
+                for k = 1:5
+                    [data,valid] = adc();
+                end
+                data = double(data);
+                freq = estFrequencyMax(double(data),fs);
+
+                % Assertions
+                testCase.assertTrue(valid);
+                testCase.verifyEqual(freq(1),freq(2),'RelTol',tol)
+                testCase.verifyEqual(mean(freq),frequency,'RelTol',tol,...
+                    'Frequency of signal unexpected')
+            end
+
+            % Clean up
+            adc.release();
+            m2k_class.contextClose();
+
+            
+        end
     end
     
 end