Printable View
I've e-mailed Mechanique several times in order to obtain a 10 Mhz bootloader file for a 16F877 at 10 Mhz but have had no reply. The 4Mhz and 20Mhz files I have, have only two characters in both files that are different. AE in the 4Mhz file and 7A in the 20 Mhz file. Would this be where a set of characters would be for 10 Mhz and what would they be? Thanks bunches Emmett
Emmett,
I disassembled the Mecanique hex file and was able to successfully modify it for a couple different clock frequencies and baudrates, including the internal PIC oscillator (no external xtal required!). If you want to do this, go to this web site and download PIC18dis.exe:
http://www.etc.ugal.ro/cchiculita/so.../picdisasm.htm
After you run the disassembler on the .hex file, you'll get a viewable .asm file that you can modify and reassemble using MPASM.
Joe
Hands down, this is the best support I have ever experienced for ANY product I have ever purchased, Let alone the fact that many people who are worlds more intelligent in this field than I can ever hope to be, are willing to give their time. PRICELESS! Thanks so much Joe! I'm off to fire up my 10Mhz!Emmett
Hi Emmet,
did you have success in changing the Mecanique Hex files in order to obtain a 16f877 10 Mhz version ?
The asm files of both files returned me just 2 differences wich are
Line 29 in 4 Mhz Version rrcf 0Ch,W
Line 29 in 20 Mhz Version rrcf 40h,W
Line 180 in 4 Mhz Version rrcf 5,W
Line 180 in 20 Mhz Version rrcf 15h,W
did you have succes on finding the relation between those values ?
I have mailed Mecanique a couple of times but they don´t answer...
Regards .
Sérgio
Please give me a fair time to respond to emails. I received this today at 17:03
> I was checking your bootloading solution yesterday and I realized
> that you have bootloader hex files for 4 Mhz and 20 Mhz for the 16F877
which isn't really a couple of times and don't answer!
Hi David,
you´re right !
I just have checked my outgoing message box and 2 of my 3 e-mails sent to you were blocked by e-mail server ! (I don´t know why, yet)
Anyway, I would like to say thank you very much for the file !
Regards !
Sérgio
Yes, they sent me one for 10 Mhz. Just takes them a little time it seems but it works fine. Emmett