Diff: plot_rise_time.cpp

Revision:

0:7e0c2b0edbc8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plot_rise_time.cpp	Tue Nov 19 20:46:36 2019 +0000
@@ -0,0 +1,60 @@
+/*
+
+#include "PID.h"
+#include "mbed.h"
+#include "time.h"
+#define RATE 0.0001
+
+PID controller_amp(1.45, 10000.0, 0.0, RATE);
+
+LocalFileSystem local("local");               // Create the local filesystem under the name "local"
+AnalogIn in(p16);
+//PwmOut out(p26);
+AnalogOut out(p18);
+
+DigitalOut led_1(LED1);
+DigitalOut led_2(LED2);
+Timer t;
+
+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;
+     
+
+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);
+  
+  controller_amp.setSetPoint(0.0);
+  t.start();
+  
+  FILE *fp = fopen("/local/rise_PID.txt", "w");  // Open "out.txt" on the local file system for writing
+
+    while(t.read() <= 2.0){
+        fprintf(fp, "%f\t%f\t%f\n", t.read(), in.read()*3.3, out.read()*3.3);
+        led_1 = 1;
+        if (t.read() >= 1.0){
+            led_2 = 1;
+            controller_amp.setSetPoint(amp);
+            scaling_factor = in.read() * input_scaling_factor;
+            controller_amp.setProcessValue(scaling_factor);
+            out = controller_amp.compute();
+            }
+            wait(RATE);
+    }
+    fclose(fp);
+    led_1 = 0;
+    led_2 = 0;
+}
+    */
+    
+