PIC32 Bootloader: Write bootloader from scratch

[justsunny]

Hi All,

Need your help/suggestion on this issue:

I need to write a bootloader for PIC32MX360F256L-80I/PT. This bootloader will download the application code from an EEPROM after power up.

Could you please suggest me how to write bootloader (step by step procedure) from scratch. I am using MPLAB IDE.

Thanks,
Sunny

 

[Dan Mills]

Start with the microchip one (PIC32-UBL), pull out all the stuff you don't need and hook it to your eeprom access routines.
There is no margin in reinventing the wheel here, and the UBL does at least mostly work.

Note that getting debugging to still work with the relocated main program (The boot loader will probably NOT quite fit in the boot flash) requires a certain amount of pain in getting the linker script right, but it can be done.

regards, Dan.