Diff: main.cpp

Revision:

4:098e3d869055

Parent:

3:56972a65cd0a

Child:

5:dbd163551a58

--- a/main.cpp	Thu Oct 04 13:17:04 2018 +0000
+++ b/main.cpp	Mon Oct 08 20:39:35 2018 +0000
@@ -1,13 +1,15 @@
 /**
-    MBED Analug Output Triangle Wave
+    MBED Analug Output Triangle Wave and PWM Wave
     main.cpp
 
     Purpose:    Output a triangle waveform
+                Output a PWM Signal of same frequency
+                Adjust LED1 brightness with PWM Signal
                 Adjust frequency using variable resistor
                 Adjust amplitude using switch
 
     @author Russell Shomberg
-    @version 1.0 2018-09-25
+    @version 1.0 2018-10-04
     
     Issues: 
         Frequency and amplitude only change at the start of the waveform by design
@@ -25,32 +27,40 @@
 // OUTPUTS
 Serial pc(USBTX, USBRX);        // for debugging
 AnalogOut Aout(p18);            // leave open lead on p18 for signal output
+PwmOut myled(LED1);
+PwmOut mypwm(p21);
 
 // VARIABLES
 float period;       // range between ~0 and 1 (seconds)
-float amplitude;    // switch between 1 and -.5
+float pwmfreq;    // switch between 1 and -.5
 float i;            // index
 
 int main() {
+         
     while(1) {
-        
         // Check settings at start of loop which are changed with 
-        if (switchPosition==1) {amplitude = 1;}
-        else {amplitude = 0.5;}
-        
         period = Ain;
+        if (switchPosition==1) {pwmfreq = 1*period;}
+        else {pwmfreq = .5*period;}
         
         // Debugging code
-        //printf("Amplitude = %1.2f Volts\n\r", amplitude * 3.3f);
-        //printf("Period = %1.2f seconds\n\r", period);
+        //printf("PWM Frequency = %1.2f Hz\n\r", pwmfreq);
+        //printf("Analog Period = %1.2f seconds\n\r", period);
+        
+        //mypwm.period(period);
+        //mypwm = pwmfreq;
         
         for (i=0;i<1;i=i+.001){
-                Aout = i*amplitude;
+                myled = 1-i;
+                mypwm = 1-i;
+                Aout = i;
                 wait(0.001*period);
             }
             
         for (i=1;i>0;i=i-.001){
-                Aout = i*amplitude;
+                Aout = i;
+                myled = 1-i;
+                mypwm = 1-i;
                 wait(0.001*period);
             }
     }