Hi all.
I'm here reading and searching but I can't find a way of counting
asynchronous TTL pulses with jal/jallib over a given time slot...
It must be done with the timer module of the pic... (I think...)
I explain:
I want to make a frequency counter for zero to 250 Mhz, with 2 external
prescaler, using direct counting for low freq's, med prescaler to about
50 Mhz and a dedicated prescaler for above 50 Mhz - 250 Mhz+
But I have not a clue how to use the timer1 as an asynconous 16 bit
pulse counter of the PIC16F88 I have for the project.
Output will be to a cheap 4bit LCD or UART serial to a PC, click will be
HS 20 Mhz XTAL...
Other candidate is a PIC16F628 in my junkbox.
Math is not a problem when I can say something like:
<pseudo-code>
a = count(pin_b1,100) -- count pulses on pin B1 for 100ms
</pseudo-code>
Any clue, sample code or tip is welcomed.
73 de CO7WT, Pavel in Cuba Island.
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