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Frequency Counter Source Code Modification

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weeder frequency counter

If you use the 16F84A for this project the software needs to be updated for bank switching to access the OPTION, TRISA and TRISB registers. The OPTION and TRIS commands compile with a warning in MPIDE but do not execute when burned in the 16F84A microcontroller.
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This is quote at the "Weeder Frequency Counter PIC 16F84 port by Peter Cousens" website.

http://www.piclist.com/techref/piclist/weedfreq.htm

Can anyone tell me how to modify the code to fit in PIC 16F84A?
 

frequency counter source

Salam,

It's easy

There are two methods to access (TRISA, TRISB and OPTION) registers.

Example if you want set porta as input
So you must load 0xff to TRISA register.

Movlw 0xff
tris porta

The above is equal to TRISA=0xff

To write the same with switching bank method.

First TRISA at bank 1
So you switch to bank 1
then change TRISA
then return to bank 0

Here is the code

bsf status,rp0 ' go to bank1
movlw 0xff
movwf trisa
bcf status,rp0 ' return to bank 0

the above code is equal to TRISA=0xff too

This is method is the same for option and trisb registers.

If you want i can change the code for you, tell me.

Bye
 

weeder+frequency counter

hi,
anyone have the original pcb design?
 

Salam,

I have edit all tris and option commands.
Here is the code.

Don't forgot to set the configuration bits correctely.


Bye
:)
 

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