interruptTest2 - interrupt rising/falling edge test

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interrupt rising/falling edge test

main.cpp@0:bdf893fb0228, 2010-07-22 (annotated)

User	Revision	Line number	New contents of line
iamhuzhe	0:bdf893fb0228	1	#include "mbed.h"
iamhuzhe	0:bdf893fb0228	2
iamhuzhe	0:bdf893fb0228	3	BusOut leds( LED4, LED3, LED2, LED1 );
iamhuzhe	0:bdf893fb0228	4	char count;
iamhuzhe	0:bdf893fb0228	5
iamhuzhe	0:bdf893fb0228	6	InterruptIn button( p16 ); // interrupt instance for the button
iamhuzhe	0:bdf893fb0228	7	Timer t; // To manage debounce by menchanical switch
iamhuzhe	0:bdf893fb0228	8
iamhuzhe	0:bdf893fb0228	9	#define DEBOUNCING_INTERVAL 20 // Debouncing interval (in mili-seconds)
iamhuzhe	0:bdf893fb0228	10
iamhuzhe	0:bdf893fb0228	11	void isr_buton( void ) {
iamhuzhe	0:bdf893fb0228	12	if ( t.read_ms() > DEBOUNCING_INTERVAL ) {
iamhuzhe	0:bdf893fb0228	13	leds = (count++) & 0xF;
iamhuzhe	0:bdf893fb0228	14	}
iamhuzhe	0:bdf893fb0228	15	t.reset(); // timer reset
iamhuzhe	0:bdf893fb0228	16	}
iamhuzhe	0:bdf893fb0228	17
iamhuzhe	0:bdf893fb0228	18	void isr_button2(void) {
iamhuzhe	0:bdf893fb0228	19	if ( t.read_ms() > DEBOUNCING_INTERVAL ) {
iamhuzhe	0:bdf893fb0228	20	leds = (count--) & 0xF;
iamhuzhe	0:bdf893fb0228	21	}
iamhuzhe	0:bdf893fb0228	22	t.reset(); // timer reset
iamhuzhe	0:bdf893fb0228	23	}
iamhuzhe	0:bdf893fb0228	24
iamhuzhe	0:bdf893fb0228	25	int main() {
iamhuzhe	0:bdf893fb0228	26	count = 0;
iamhuzhe	0:bdf893fb0228	27	t.start(); // timer start
iamhuzhe	0:bdf893fb0228	28	button.rise( &isr_buton );
iamhuzhe	0:bdf893fb0228	29	button.fall(&isr_button2);
iamhuzhe	0:bdf893fb0228	30	while ( 1 ) {
iamhuzhe	0:bdf893fb0228	31	}
iamhuzhe	0:bdf893fb0228	32	}