18F4550 bootloader

[kudretuzuner]

Hello to everyone
I just joined the forum. I'm interested in loading and using the bootloader on the 18F4550 PIC. Where can I find the link and the scheme of a hex file that I can run with 4 - 8 or 20 mhz. Thanks.

[filip]

Hi,

You can use the configuration bits schemes located in the compiler - P18F4550_PLL_8_to_48MHz.cfgsch and P18F4550_PLL_8_to_8MHz.cfgsch.

Regards,
Filip.

[kudretuzuner]

Hello, my problem is I need a bootloader hex file that can run at 4-8- or 20mhz on the 18F4550 PIC. I have tried many hex files from many sources. But I cannot load the hex file of a simple LED flash program. There is no problem in the program I wrote. When I install it directly with PICKIT2, the program works just fine. But I couldn't upload the program you wrote with none of the various bootloader hex files I have to the PIC. Where am I doing wrong? thank you.

[filip]

Hi,

If you are using USB HID bootloader that we wrote, then the code that you wish to upload must have the same config bits settings as the bootloader does, in order to execute correctly.

Regards,
Filip.