Measure the width (time-wise) of an incoming pulse.
Dependencies: dispBoB mbed PCA9635
Diff: counter.cpp
- Revision:
- 2:bb7e46464d17
- Parent:
- 1:f04131cae8b8
--- a/counter.cpp Mon Jul 11 13:57:07 2011 +0000 +++ b/counter.cpp Tue Jul 12 10:05:44 2011 +0000 @@ -12,15 +12,19 @@ void down(){ //call this upon falling edge t.stop(); //stop timer db.locate(0); - db.printf("%06d", t.read_ms()); //print counter info to dispBoB + db.printf("%06d", t.read_ms()); //print counter info to dispBoB t.reset(); //reset timer } int main() { trigger.mode(PullUp); //activate internal pull up (hardware specific) - db.init(); //again ALWAYS initialise dispBoB - db.cls(); //clear screen + db.init(); //ALWAYS initialise dispBoB + db.cls(); trigger.rise(&up); //attach up() to interrupt on rising edge of trigger trigger.fall(&down); //attach down() to interrupt on falling edge of trigger - db.printf("%06d", t.read_ms()); //display an inital count "000000" + db.printf("%06d", t.read_ms()); //display an initial count "000000" + + //To change the timebase just replace the read_ms() function with + //read() for seconds and read_us() for microseconds. These use a 32bit + //int microsecond counter, so have a max time of ~30mins }