Isaac Marino Bavaresco wrote:
> 
> Nick_F escreveu:
>> Hi All,
>> I intend to start a project that uses a LCD display (2x16, parallel data
>> input), three switches for input, three digital outputs, that each
>> generates
>> a pulse with a specific width. 
>> Pulse2 and pulse3 come after delay2 and delay3. I want to modify the
>> delays
>> from 1us to 200us, with a resolution of 1us, as well as the widths of
>> pulse1, pulse2, pulse3.
>> For this operation, I think using three switches, as: "Select Next
>> Parameter/Set Value", "Up", "Down".
>>   
> 
> One microsecond resolution for a 5 MIPS PIC means you have a timing loop
> that takes 5 instruction cycles.
> It may be feasible if you use assembly creatively.
> 
> But you will need to stop the activity when you want to interact with
> the user, or the delays and pulse widths will suffer unpredictable
> stretching.
> 
> Is the sequence always the same? (pulse1, delay1, pulse2, delay2...)
> 
> Regards,
> Isaac
> 
> 
Hi Isaac,

The application is not critical at all. Even if I can't get a resolution of
1us, but 2us (anything up to 5us!) is still ok.
The sequence of pulses is always the same: Pulse1 - Pulse2 - Pulse3. Pulse1
has Width1, Pulse2 and Pulse3 have equal Width23. The delay between each
pulse is constant. 
In the moment I press on the keys, to modify the parameters of the pulses,
Pulse1 should stop in 0 or 1 (not sure which one at the moment). The other
two pulses are not critical.
Once I set the parameters, all three pulses should reappear.

Regards,
Nick
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