Diff: main.cpp

Revision:

0:2d3d93d7b204

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Feb 17 18:32:34 2010 +0000
@@ -0,0 +1,49 @@
+// Example PwmIn class to detect PWM inputs, sford
+//  - Note: uses InterruptIn, so not available on p19/p20
+
+#include "mbed.h"
+
+class PwmIn {
+public:
+    PwmIn(PinName p) : _p(p) {
+        _p.rise(this, &PwmIn::rise);
+        _p.fall(this, &PwmIn::fall);
+        _period = 0.0;
+        _pulsewidth = 0.0;
+        _t.start();
+    }
+    
+    void rise() {
+        _period = _t.read();
+        _t.reset();
+    }
+    
+    void fall() {
+        _pulsewidth = _t.read();
+    }
+    
+    float period() { return _period; }
+    float pulsewidth() { return _pulsewidth; }
+    float dutycycle() { return _pulsewidth / _period; }
+
+protected:        
+    InterruptIn _p;
+    Timer _t;
+    float _pulsewidth, _period;
+};
+
+PwmOut x(p21);
+PwmOut y(p22);
+
+PwmIn a(p5);
+PwmIn b(p6);
+
+int main() {
+    x = 0.5;
+    y = 0.2;
+    while(1) {
+        printf("a: pw = %f, period = %f\n", a.pulsewidth(), a.period());
+        printf("b: pw = %f, period = %f\n", b.pulsewidth(), b.period());
+        wait(2);
+    }
+}