Re: [Usbpicprog-technical] PIC16F73 memory offset.

[Frans S. <fra...@gm...>]

Dear Adly Abdullah,

I am sorry that you experience problems with usbpicprog.
I don't think the actual problem here is reading the firmware, there
must be a problem while writing since writing is a protocol that occurs
with 4 bytes at a time for this PIC.
I guess you are using the latest version (0.4.1) of the software /
firmware since you have recently purchased it.
Could you tell me if the problem occurs every 4 bytes, or only every
0x18 bytes? That is very important for me to know, because it tells me
where to look.
It would also help if you send me the hex file you are trying to
program, and also the saved hex file which you have read back from the
16F73.

I have never heard of any problems with the 16F73, but I guess this is
not a very popular device that many people have been using.
I will for now put an X on writing program memory in the supported
devices section of usbpicprog.

Kind regards,

Frans Schreuder

On 12/09/2010 04:46 PM, Adly Abdullah wrote:
> This is an issue with PIC16F73
>
> I'm not sure if the issue is simply with reading the memory or if it is
> with programming the PIC but whatever I program into the PIC gets an
> offset of 4 bytes when read back. For example, say I'm trying to program
> "8A 11 11 28 ..." it fails verification and when I try to read it back I
> get "FF 3F FF 3F 8A 11 11 28 ...".
>
> Actually, the entire left column is shifted by 4 bytes (which is why I
> suspect it may simply be a bug in reading the chip) as in it shifts
> everything at 0x000000 by 4 bytes and everything at 0x001800 by 4 bytes
> and everything at 0x003000 etc..
>
>
>
>
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