Bhakti Kulkarni / DebounceInterrupts

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Dependents:   Microwave_MBED MicrowaveSimulation_LPC1768 RTOS_Alarm_Clock USB_Project_Host ... more

DebounceInterrupts.h@7:2d73e219dadf, 2014-02-18 (annotated)

Committer:
kandangath
Date:
Tue Feb 18 07:00:07 2014 +0000
Revision:
7:2d73e219dadf
Parent:
5:3c0f741fb448
Child:
8:4b3ff16d5f91
Add counter for debounced interrupts

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kandangath 0:ca5a0fee9f52 1
kandangath 0:ca5a0fee9f52 2 /**
kandangath 1:ffacad1b455a 3 * Debounces an InterruptIn
kandangath 0:ca5a0fee9f52 4 */
kandangath 5:3c0f741fb448 5
kandangath 5:3c0f741fb448 6 /*
kandangath 5:3c0f741fb448 7 Example:
kandangath 5:3c0f741fb448 8 InterruptIn up_button(p15);
kandangath 5:3c0f741fb448 9
kandangath 5:3c0f741fb448 10 void onUp()
kandangath 5:3c0f741fb448 11 {
kandangath 5:3c0f741fb448 12 // Do Something
kandangath 5:3c0f741fb448 13 }
kandangath 5:3c0f741fb448 14
kandangath 5:3c0f741fb448 15 int main()
kandangath 5:3c0f741fb448 16 {
kandangath 5:3c0f741fb448 17 DebounceInterrupts upD(&onUp, &up_button, INT_FALL, 100);
kandangath 5:3c0f741fb448 18 while(1) {
kandangath 5:3c0f741fb448 19 ...
kandangath 5:3c0f741fb448 20 }
kandangath 5:3c0f741fb448 21 }
kandangath 5:3c0f741fb448 22 */
kandangath 0:ca5a0fee9f52 23
kandangath 0:ca5a0fee9f52 24 #ifndef DEBOUNCE_INTERRUPTS_H
kandangath 0:ca5a0fee9f52 25 #define DEBOUNCE_INTERRUPTS_H
kandangath 0:ca5a0fee9f52 26
kandangath 0:ca5a0fee9f52 27 #include <stdint.h>
kandangath 0:ca5a0fee9f52 28 #include "mbed.h"
kandangath 0:ca5a0fee9f52 29
kandangath 4:19689187352e 30 enum interruptTrigger{
kandangath 4:19689187352e 31 INT_FALL = 0,
kandangath 4:19689187352e 32 INT_RISE = 1
kandangath 4:19689187352e 33 };
kandangath 4:19689187352e 34
kandangath 0:ca5a0fee9f52 35 class DebounceInterrupts {
kandangath 0:ca5a0fee9f52 36 private:
kandangath 7:2d73e219dadf 37 unsigned int _debounce_us;
kandangath 7:2d73e219dadf 38 unsigned int _debounce_count;
kandangath 7:2d73e219dadf 39
kandangath 0:ca5a0fee9f52 40 void (*fCallback)(void);
kandangath 3:e4b7033508d1 41 void _onInterrupt(void);
kandangath 7:2d73e219dadf 42 void _callback(void);
kandangath 0:ca5a0fee9f52 43 public:
kandangath 4:19689187352e 44 DebounceInterrupts(void (*fptr)(void), /* function to be called after debounced InterruptIn */
kandangath 4:19689187352e 45 InterruptIn *interrupt, /* InterruptIn to monitor */
kandangath 4:19689187352e 46 const interruptTrigger& trigger, /* true: rise, false: fall */
kandangath 4:19689187352e 47 const uint32_t& debounce_ms=10); /* stability duration required */
kandangath 0:ca5a0fee9f52 48 ~DebounceInterrupts();
kandangath 7:2d73e219dadf 49 /*
kandangath 7:2d73e219dadf 50 * Get number of de-bounced interrupts
kandangath 7:2d73e219dadf 51 * @return: debounced count
kandangath 7:2d73e219dadf 52 */
kandangath 7:2d73e219dadf 53 unsigned int get_debounce();
kandangath 0:ca5a0fee9f52 54 };
kandangath 0:ca5a0fee9f52 55 #endif