8 replies to this topic

[Bendage]

Hey guys, Thread.Sleep is millis How to delay Netduino down to the microsecond?

[Bendage]

Actually I just ended up writing one myself...

private void DelayMicroseconds(int microseconds)
{
    long delayTime = microseconds * 10;
    long delayStart = Utility.GetMachineTime().Ticks;
    while ((Utility.GetMachineTime().Ticks - delayStart) < delayTime) ;
}

[CW2]

Please note due to Netduino timer resolution the code works in multiples of ~21µs.

[Mario Vernari]

If your goal is a well-defined pause, why don't use a surrogate such as:

temp++;

Just an example...I don't know how much it takes.
Cheers

[Bendage]

Please note due to Netduino timer resolution the code works in multiples of ~21µs.

Any idea what the Go timer resolution is?

[CW2]

Any idea what the Go timer resolution is?

1 µs

[Jarrod Sinclair]

1 µs

What about the hardware interrupts? I though they were 1 µs as well.

[Cornelius]

Hi,

Here's a function that i wrote. I find it quite accurate: (loosely based on the functions mentioned above)

private static void delayMicroseconds(int microseconds)
{
   for (int temp = 0; temp < ((microseconds - 208)/61); temp++);
}

It works in ~65us wide steps, and it's minimum is about 240us.

have fun,

Attached Files

•  delayUs.png   19.36KB   56 downloads

[Bendage]

Hi,

Here's a function that i wrote. I find it quite accurate: (loosely based on the functions mentioned above)

private static void delayMicroseconds(int microseconds)
{
   for (int temp = 0; temp < ((microseconds - 208)/61); temp++);
}

It works in ~65us wide steps, and it's minimum is about 240us.

have fun,

Nice idea. I will play with this when my scope comes in the mail.