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[on:]

Hi,

I'm trying to read an accellerometer with the arduino board and I need to go below millis() to get the pulse length. I saw a pulseIn() implementation in wiring but the arduino 002 alpha doesn't implement it. Do I need to install a wiring library? How can I do that? Is there any shortcut to resolve the problem?

Thank you

Ignazio

[Reply #1 on:]

Hej Iganzio,

we haven't implemented that function yet. However there are a couple of easy roundabouts, I will mention the easiest one that we use with the Memsic2125:

Code:

val = digitalRead(Signal); // Append signal value to val
while(val == LOW) { // Loop until pin reads a high value
 val = digitalRead(Signal);
}

while(val == HIGH) { // Loop until pin reads a high value
 val = digitalRead(Signal);
 timecount = timecount +1;            // Count echo pulse time
}

This code snippet will listen to a HIGH pulse.

Which accelerometer are you using?

/David

[Reply #2 on:]

David,

thanks so much

that works perfectly

ignazio

[Reply #3 on:]

uoops,

I misspelled your name .. I am sorry  :-[

/David

[Reply #4 on:]

No big deal

The accellerometer is the Memsic 2125

Ignazio