Diff: main.cpp

Revision:

0:f3b48db841cd

diff -r 000000000000 -r f3b48db841cd main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Mar 22 17:28:28 2017 +0000
@@ -0,0 +1,54 @@
+
+#include "mbed.h"
+
+PwmOut PWM1(PF_8);     // pwm outputs
+PwmOut PWM2(PF_7);
+DigitalOut led1(LED1);
+
+/* Function prototype */
+void motorControl(bool dir, float pwmVal);
+
+int main()
+{
+    
+    led1 = 1;
+    wait(1);
+    led1 = 0;
+    PWM1.write(0);       // Duty cycles are initially zero   
+    PWM2.write(0);   
+    PWM1.period(0.02f);   // 1 kHz pwm frequency
+    PWM2.period(0.02f);
+    
+    while(1)
+    {
+        for(float i=0;i<1;i=i+0.01f)  // increase speed from 0 to 1 in 5 seconds (50ms*100). 
+        {
+            motorControl(1,i);
+            wait(0.05f);    
+        }  
+        for(float i=1;i>0;i=i-0.01f)  // decrease speed from 1 to 0 in 5 seconds (50ms*100).
+        {
+            motorControl(0,i);
+            wait(0.05f);    
+        }   
+        led1 = 1;
+        wait(0.5);
+        led1 = 0;
+    }    
+}
+
+// This is a motor control function which controls the speed and direction of
+// a motor. Motor drivers like L293D can be used.
+void motorControl(bool dir, float pwmVal)
+{
+    if(dir==1)               // forward direction
+    {
+        PWM2.write(0);   
+        PWM1.write(pwmVal);        
+    }
+    else if(dir==0)         // reverse direction
+    {     
+        PWM1.write(0);       
+        PWM2.write(pwmVal);   
+    }    
+}
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