Revision 0:ca5a0fee9f52, committed 2014-02-18

Comitter:

kandangath

Date:

Tue Feb 18 01:05:10 2014 +0000

Child:

1:ffacad1b455a

Commit message:

Init version of class to debounce InterruptIn

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DebounceInterrupts.cpp	Tue Feb 18 01:05:10 2014 +0000
@@ -0,0 +1,27 @@
+#include "DebounceInterrupts.h"
+
+Timeout timeout;
+
+DebounceInterrupts::DebounceInterrupts(void (*fptr)(void), 
+                                       InterruptIn *interruptIn, 
+                                       const bool& rise,
+                                       const unsigned int& debounce_ms)
+{
+    fCallback = fptr;
+    if (rise) {
+        interruptIn->rise(this, &DebounceInterrupts::onInterrupt);
+    } else {
+        interruptIn->fall(this, &DebounceInterrupts::onInterrupt);
+    }
+    fDebounce_us = 1000*debounce_ms;
+}
+
+DebounceInterrupts::~DebounceInterrupts()
+{
+}
+
+void DebounceInterrupts::onInterrupt()
+{
+    timeout.detach();
+    timeout.attach_us(fCallback,fDebounce_us);
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DebounceInterrupts.h	Tue Feb 18 01:05:10 2014 +0000
@@ -0,0 +1,28 @@
+
+/**
+ * Debounces an interrupt
+ */
+ 
+#ifndef DEBOUNCE_INTERRUPTS_H
+#define DEBOUNCE_INTERRUPTS_H
+
+#include <stdint.h>
+#include "mbed.h"
+
+class DebounceInterrupts {
+private:
+    unsigned int fDebounce_us;
+    void (*fCallback)(void);
+    void onInterrupt(void);
+public:
+    /** Setup debounce for an InterruptIn.
+     *  fptr: pointer to function to be called when debounced Interrupt fires
+     *  interrupt: InterruptIn to monitor
+     *  rise: true:rise, false: fall
+     *  debounce_ms: milliseconds to wait for a stable input
+     *  @return Pull the oldest element from the buffer
+     */
+    DebounceInterrupts(void (*fptr)(void), InterruptIn *interrupt, const bool& rise=true, const uint32_t& debounce_ms=10);
+    ~DebounceInterrupts();
+};
+#endif
\ No newline at end of file