Daniel Worrall / Mbed 2 deprecated pulseWidth

Measure the width (time-wise) of an incoming pulse.

Dependencies:   dispBoB mbed PCA9635

counter.cpp@1:f04131cae8b8, 2011-07-11 (annotated)

Committer:
d_worrall
Date:
Mon Jul 11 13:57:07 2011 +0000
Revision:
1:f04131cae8b8
Parent:
0:dd684fb95312
Child:
2:bb7e46464d17
version2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
d_worrall 0:dd684fb95312 1 #include "mbed.h"
d_worrall 0:dd684fb95312 2 #include "dispBoB.h"
d_worrall 0:dd684fb95312 3
d_worrall 0:dd684fb95312 4 dispBoB db(p28, p27, p26); //instantiate a dispBoB object
d_worrall 0:dd684fb95312 5 InterruptIn trigger(p12); //set up the trigger as an external interrupt
d_worrall 0:dd684fb95312 6 Timer t;
d_worrall 0:dd684fb95312 7
d_worrall 1:f04131cae8b8 8 void up(){ //call this on rising edge
d_worrall 1:f04131cae8b8 9 t.start(); //start timer
d_worrall 0:dd684fb95312 10 }
d_worrall 0:dd684fb95312 11
d_worrall 1:f04131cae8b8 12 void down(){ //call this upon falling edge
d_worrall 1:f04131cae8b8 13 t.stop(); //stop timer
d_worrall 0:dd684fb95312 14 db.locate(0);
d_worrall 0:dd684fb95312 15 db.printf("%06d", t.read_ms()); //print counter info to dispBoB
d_worrall 1:f04131cae8b8 16 t.reset(); //reset timer
d_worrall 0:dd684fb95312 17 }
d_worrall 0:dd684fb95312 18
d_worrall 0:dd684fb95312 19 int main() {
d_worrall 0:dd684fb95312 20 trigger.mode(PullUp); //activate internal pull up (hardware specific)
d_worrall 1:f04131cae8b8 21 db.init(); //again ALWAYS initialise dispBoB
d_worrall 0:dd684fb95312 22 db.cls(); //clear screen
d_worrall 1:f04131cae8b8 23 trigger.rise(&up); //attach up() to interrupt on rising edge of trigger
d_worrall 1:f04131cae8b8 24 trigger.fall(&down); //attach down() to interrupt on falling edge of trigger
d_worrall 0:dd684fb95312 25 db.printf("%06d", t.read_ms()); //display an inital count "000000"
d_worrall 0:dd684fb95312 26 }