Diff: mbed/Ticker.h

Revision:

0:80df663dd15e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed/Ticker.h	Fri May 19 14:32:14 2017 +0000
@@ -0,0 +1,117 @@
+/* mbed Microcontroller Library - Ticker
+ * Copyright (c) 2007-2009 ARM Limited. All rights reserved.
+ */ 
+
+#ifndef MBED_TICKER_H
+#define MBED_TICKER_H
+
+#include "TimerEvent.h"
+#include "FunctionPointer.h"
+
+namespace mbed {
+
+/* Class: Ticker
+ *  A Ticker is used to call a function at a recurring interval
+ *
+ * You can use as many seperate Ticker objects as you require. 
+ *
+ * Example:
+ * > // Toggle the blinking led after 5 seconds
+ * >
+ * > #include "mbed.h"
+ * > 
+ * > Ticker timer;
+ * > DigitalOut led1(LED1);
+ * > DigitalOut led2(LED2);
+ * > 
+ * > int flip = 0;
+ * > 
+ * > void attime() {
+ * >     flip = !flip;
+ * > }
+ * >
+ * > int main() {
+ * >     timer.attach(&attime, 5);
+ * >     while(1) {
+ * >         if(flip == 0) {
+ * >             led1 = !led1;
+ * >         } else {
+ * >             led2 = !led2;
+ * >         }
+ * >         wait(0.2);
+ * >     }
+ * > }
+ *
+ */
+class Ticker : public TimerEvent {
+
+public:
+
+    /* Function: attach
+     *  Attach a function to be called by the Ticker, specifiying the interval in seconds
+     *     
+     * Variables:
+     *  fptr - pointer to the function to be called
+     *  t - the time between calls in seconds
+     */
+    void attach(void (*fptr)(void), float t) {
+        attach_us(fptr, t * 1000000.0f);
+    }
+    
+    /* Function: attach
+     *  Attach a member function to be called by the Ticker, specifiying the interval in seconds
+     *     
+     * Variables:
+     *  tptr - pointer to the object to call the member function on
+     *  mptr - pointer to the member function to be called
+     *  t - the time between calls in seconds
+     */
+    template<typename T>
+    void attach(T* tptr, void (T::*mptr)(void), float t) {
+        attach_us(tptr, mptr, t * 1000000.0f);
+    }
+    
+    /* Function: attach_us
+     *  Attach a function to be called by the Ticker, specifiying the interval in micro-seconds
+     *     
+     * Variables:
+     *  fptr - pointer to the function to be called
+     *  t - the time between calls in micro-seconds
+     */
+    void attach_us(void (*fptr)(void), unsigned int t) {
+        _function.attach(fptr);
+        setup(t);
+    }
+
+    /* Function: attach_us
+     *  Attach a member function to be called by the Ticker, specifiying the interval in micro-seconds
+     *     
+     * Variables:
+     *  tptr - pointer to the object to call the member function on
+     *  mptr - pointer to the member function to be called
+     *  t - the time between calls in micro-seconds
+     */    
+    template<typename T>
+    void attach_us(T* tptr, void (T::*mptr)(void), unsigned int t) {
+        _function.attach(tptr, mptr);
+        setup(t);
+    }
+    
+    /* Function: detach
+     *  Detach the function
+     */        
+    void detach();
+
+protected:
+
+    void setup(unsigned int t);
+    virtual void handler();
+
+    unsigned int _delay;
+    FunctionPointer _function;
+
+};
+
+} // namespace mbed
+
+#endif
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