Flash bootloader for PIC18f and 16f devices

microchip flash botloader

Hi, I'm trying to program a pic 18F8720 with a microchip bootloader

i have found this aplication note from microchip website:
Flash bootloader for PIC18f and 16f devices (an851) and some source files to make this bootloader Author: Ross M. Fosler and Rodger Richey

The bootloader have a good graphical interface for windows and easy to use it detects automatically the connected device and the serial Speed (up to 115200)

Bootloader is placed on first 1FF bytes of memory

but have one problem:
When i try to import a file to write to device this aplication doesn't understand intel hex files


This is an example of imported file (org 0x400)

000400 0C EF 02 F0 EE 6A EA 50 E2 62 FC D7 E9 50 E1 62
000410 F9 D7 12 00 FF FF FF FF FF FF FF FF FF FF FF FF
000410 FF FF FF FF FF FF FF FF 0E EE E7 F0 1F EE 00 F0
000420 FF FF FF FF FF FF FF FF 11 EE 00 F0 03 EC 02 F0
000430 FF FF FF FF FF FF FF FF 80 6A FD D7 9E AA FE D7
............................
...........................


As you can see some bytes are FF's I don't know why because the original
.hex file is OK



I'm using a picc18 and this compiler generates a intel hex file compatible



Someone have some idea ???

16f bootloader

I have not tried 18 series bootloaders 16 series is Ok. You can do one thing .Try the bootloader available at www.microchipc.com It has got good support also.Shane will help you.Only limited Xtal frequency will be available