Jinx-4 wrote:
> 
>> By using a more modern PIC (maybe an low-end PIC18) you get more
>> "things" (like better timers, table-lookup and so on) to play with.
> 
> An 18F would also at least double the maximum clock speed. Delays
> and pulses with 1us resolution is going to be a lot easier with a 40MHz
> clock than a 20MHz. I used 50Mhz Scenix's (equivalent to a 200MHz
> PIC, almost 50MIPS) for a stepper motor controller project as no PIC
> was fast enough for the data-fed loops needed
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> 

Thanks Jinx,

I will keep that in mind. I don't totally agree with this advice, using a
more powerful microcontroller.
As far as I know, a 20MHz PIC16F628A can have a resolution of 200nS, which
is 5 times better than my desired 1us. At the moment I think a faster PIC
would be required mostly to supplement poor programming skills. At the
moment I know very little, so it would be even worse to learn something more
complex.
I've never used a timer, PWM, interrupts, I have plenty to learn.
Maybe the future will prove me wrong, but I have to find the maximum
capability of this PIC before looking to a more powerful one. From what I
noticed, this advice to use a better microcontroller is given too often and
many users are able to use maybe just 10% of the capability of a
microcontroller, then go up and learn another bit, and so on.

Regards,
Nick
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