Diff: AmpRiseTime.cpp

Revision:

0:7e0c2b0edbc8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AmpRiseTime.cpp	Tue Nov 19 20:46:36 2019 +0000
@@ -0,0 +1,74 @@
+/*
+#include "PID.h"
+#include "mbed.h"
+#include "time.h"
+#define RATE 0.0001
+
+//Kc, Ti, Td, interval
+//PID controller_amp(2.0, 100.0, 0.5, RATE);
+//PID controller_amp(1.65, 10000.0, 0.0, RATE);
+PID controller_amp(1.65, 10000.0, 0.0, RATE);
+
+
+AnalogIn pv_amp(p16);     //output from the amp detector
+PwmOut co_amp(p26);       //output from PID to adjust amplitude
+//AnalogOut co_amp(p18);
+DigitalOut myled(LED2);
+
+LocalFileSystem local("local");
+
+
+float amp = 1.5; // Desired voltage at the variable attenuator corresponding to -10 dB 
+float amp_detector = 1.686; // Desired voltage at the output of the detector with VA set at -10 dB and input power = 5 dBm
+float input_scaling_factor = amp/amp_detector;
+float scaling_factor;
+float output;
+
+int main(){
+
+  //Analog input from 0.0 to 3.3 V
+  controller_amp.setInputLimits(0.0, 3.3);
+  
+  //Pwm output from 0.0 to 3.3 V
+  controller_amp.setOutputLimits(0.0, 1.0);
+  
+  //If there's a bias.
+  controller_amp.setBias(0.0);
+  controller_amp.setMode(0);
+  
+  //We want the process variables to be V_amp
+  controller_amp.setSetPoint(0.0);
+  myled = 1;
+  
+  wait(3);
+  controller_amp.setSetPoint(amp);
+  myled = 0;
+
+  FILE *fp = fopen("/local/data.txt", "w");
+
+
+  while(1){
+    //Update the process variable.
+    scaling_factor = pv_amp.read() * input_scaling_factor;
+  //scaling_factor = pv_amp.read() * 1.5/1.686;
+    controller_amp.setProcessValue(scaling_factor);
+    
+    //Set the new output.
+    co_amp = controller_amp.compute();
+   // co_amp.write(controller_amp.compute());
+    
+    
+
+    fprintf(fp, "Input Voltage %f\n", pv_amp.read());
+  //  fprintf(fp, "Output Voltage %f\n",co_amp.write(controller_amp.compute()) );
+    fprintf(fp, "Scaling Factor %f\n", scaling_factor);
+  //  fprintf(fp, "Process Variable" "%f\n",controller_amp.setProcessValue(scaling_factor));
+    fclose(fp);
+    
+    
+    //Wait for another loop calculation.
+    wait(RATE);
+  }
+
+}
+*/
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