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Re-locating Microchip C30 library assembly code

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engr.waqas

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I am working on a PIC24F bootloader . I want to keep the flash(MCU's internal memory) erase and write functions in the bootloader section so they don't get erased or affected with the rest of the code.

I am using Microchip C30 built-in library functions. How can I add assembly source files, flash_helper.s and flash_helper2.s to my C code?

How can I locate these codes to a specific location in program memory instead of .libc section? Do the following piece of code in flash_helper.s and flash_helper2.s files need to be edited?

.ifdef ffunction
.section .libc.flash_helper123456,code
.else
.section .libc,code
.endif
 

You can simply add the files to the 'Source Files' list in the project window. (If you are using MPLAB)
To locate the code in memory, you need to edit the linker file.

Look at a few Microchip app notes for bootloaders to get an idea of how to edit the linker file.
 

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