PULSIN Resolution

[Dave]

keithdoxey, 40 Mhz. is correct for getting 1uS resolution. However 80Mhz. would be a stretch for a PIC micro. If you need 1uS resolution why not use the internal timers available in the PIC and use atleast a 4Mhz. crystal? That will give you 1uS. resolution..

Dave Purola,
N8NTA

[keithdoxey]

However 80Mhz. would be a stretch for a PIC micro.

Hi Dave,

I realise that a PIC wont run at that speed....yet, but give them a couple of years and we will probably see devices that will run at 100MHz+.

Look at the way Intel and AMD clock speeds have shot up over the last few years!

Also look at how the available memory is increasing as well. PICs are getting evermore powerful

Regards

[Security]

Is there a way to make pulsin count slower?

[Darrel Taylor]

Athough it might be nice ...

There aren't any defines that would make PulsIn count slower.

A slower OSC freq makes it count slower, or you could create your own define that adds some NOP's to the library routine. (not recommended)

Might just be easier to create a simple subroutine to count the time in a loop, which is all PulsIn does anyway.
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