Bootloader for a 18f4520

Pota78 · Joined: 09 Sep 2005 Posts: 16

Hi everyone, I read many post about Bootloaders but I'm not able to find a simple bootloader for the 18f4520...
Every bootloader I found is for 18f452 and I'm not sure the code is portable to his 0 friend...
I tried the tinybootloader but I was not able to make it work...

Have you ever used a bootloader with this pic?
what did you use? Thank you very much

asmallri · Joined: 12 Aug 2004 Posts: 1635 Location: Perth, Australia

Pota78 · Joined: 09 Sep 2005 Posts: 16

From which code have you started from? If I ask you to send me your code I have not many possibilities that you send it to me, right? Smile

By the way, what program did you use to send the hex file to the pic? hyperterminal?

Thank you very much,
Andrea

asmallri · Joined: 12 Aug 2004 Posts: 1635 Location: Perth, Australia

I wrote my own code in assembler however it is possible for you to modify the bootloader code provided by CCS for this PIC.

I use my own application to upload, download, erase target devices. I sell my bootloaders so sorry but no I cannot send it to you but I am sure someone can point you to a free bootloader if you do not want to modify the CCS bootloader yourself.
_________________
Regards, Andrew

http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!!

Pota78 · Joined: 09 Sep 2005 Posts: 16

Thank you very much... so, is there anyone else who could suggest me a working (and free) Bootloader for pic18f4520?

Andrew, my name is Andrea, the italian translation of Andrew, we have the same name... sure that you cannot send me just a little portion of the code? Smile

Naturally i'm joking, thank you very much Smile

Andrea

Pota78 · Joined: 09 Sep 2005 Posts: 16

I'm still here...
In the CCS bootloader I find this comment after the #use rs232 directive:

Guest · Posted: Thu Nov 10, 2005 8:59 am

Pota78 · Joined: 09 Sep 2005 Posts: 16

Thank you, but I found the error in my customization of the tiny bootloader and now it works great Smile

Thank you very much
Andrea

Guest · Posted: Thu Nov 10, 2005 5:39 pm

What did you customize to get it to work? Question

Thanks

Pota78 · Joined: 09 Sep 2005 Posts: 16

I have choosen the right pic after the LIST directive (18f4520)
I have written the right oscillator frequency (in my case 8000000)
I have deleted the __config directives and I have re-written them without using the CONFIGXX words (Config1h etc.)
Ex: