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Trying to program PIC18F4620 using own serial bus

 
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nik84



Joined: 07 Mar 2011
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Trying to program PIC18F4620 using own serial bus
PostPosted: Mon Mar 07, 2011 1:44 am     Reply with quote

Hi,
I am trying to program the PIC18F4620 using my own programmer essentially. I am using the low-voltage programming method as stated in the Flash Micro-controller programming specification and toggling PGM, PGC and PGD accordingly in order to write to PIC memory.

I am writing to memory using table write commands which consist of the 1000 command followed by a 16-bit operand. I am just trying to load a simple program into code memory which will tri-state PORT C on power up.

I am running the PIC using a 25MHz crystal in HS mode. Hence, I think I will need to program this in the configuration space of memory as well. Does someone know the exactly programming sequence required to do this?

Thanks
PCM programmer



Joined: 06 Sep 2003
Posts: 20385

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PostPosted: Mon Mar 07, 2011 1:05 pm     Reply with quote

Study the sample code for the 12F675 here:
http://www.ccsinfo.com/forum/viewtopic.php?t=26816

Download the Programming spec for the 12F675 and read it
while looking at the sample code in the thread above.
http://ww1.microchip.com/downloads/en/DeviceDoc/41191D.pdf

Download the Programming specification for the 18F4620.
Look at the differences between it and the 12F675. Decide how to
modify the sample code to make it work with the 18F4620.
http://ww1.microchip.com/downloads/en/DeviceDoc/39622L.pdf


Also, this Programmer/Debugger sub-forum is not the place to ask
questions like this. This sub-forum is about problems with the CCS
programmers/debuggers, such as ICD-U40, etc.

If you have questions on writing programs, post them in the General
Discussion forum:
http://www.ccsinfo.com/forum/viewforum.php?f=1
Don't post questions in the 12F675 thread given above. Nobody wants to
answer questions in the Code Library forum, unless it is about bugs in
the original post.
nik84



Joined: 07 Mar 2011
Posts: 2

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PostPosted: Mon Mar 07, 2011 1:48 pm     Reply with quote

Thanks for the info. I will try it out.
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