Framework (
A-Z)
Reference for Wiring version 1.0 Build 0100+ If you have a previous version, use the reference included with your software. If see any errors or have any comments, let us know.
Name |
pulseIn() |
Examples |
int inpin = 8;
int val = 0;
void setup() {
pinMode(inpin, INPUT);
Serial.begin(9600);
}
void loop() {
val = pulseIn(inpin, HIGH);
Serial.println(val);
delay(100);
}
|
Description |
The pulseIn() method returns the length in microseconds on a digital input pin for a short period of time from 10 milliseconds to 3 minutes. It can be used to read sensors that return a pulse train like some accelerometers or rangers. The user can specify the counting on HIGH or LOW transitions. The pulseIn command stops all activity while executing. A timeout of 1 second (1000000 microseconds) prevents the command to wait forever. A specific timeout in microseconds can also be specified. |
Syntax |
pulseIn(pin,transition)
pulseIn(pin,transition,timeout)
|
Parameters |
pin |
int: the pin used for reading the pulse |
transition |
HIGH or LOW |
timeout |
int: a timeout value in microseconds |
|
Returns |
int |
Usage |
Application |
Updated on July 07, 2011 11:08:49pm PDT