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Boot Loader question

 
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Frozen01



Joined: 23 Apr 2009
Posts: 32

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Boot Loader question
PostPosted: Tue Apr 20, 2021 12:19 pm     Reply with quote
I used the PCD boot loader example to get a boot loader to load a program via serial. It worked OK for my simple test code, but when I try a larger piece of code, it doe not work. I suspect that the issue is with the following part of the boot loader code:

Code:
#ifndef LOADER_PAGES
 #if getenv("FLASH_ERASE_SIZE") == 128
  #define LOADER_PAGES 19
 #else
  #define LOADER_PAGES 2
 #endif
#endif


and the matching piece in loader_pcd.c:

Code:
/*
#ifndef LOADER_PAGES
 #if getenv("FLASH_ERASE_SIZE") == 128
  #define LOADER_PAGES 13
 #else
  #define LOADER_PAGES 1
 #endif
#endif


I am targeting a dsPIC33EP512MU810. but I am unsure exactly how to change these. These seem to allocate the memory locations.

I really would like to allow all of the available program memory to be used. So something like Max program size - bootloader size (I think that has to be rounded to a "page" number
Ttelmah



Joined: 11 Mar 2010
Posts: 19539

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PostPosted: Wed Apr 21, 2021 12:32 am     Reply with quote
The code you are showing is not the problem. This leaves the space for
the bootloader.
There is nothing in the bootloader that should restrict you from programming
the whole chip (except for the bootloader area, and on your PIC the top
page where the configuration fuses reside).
How big is the program you are trying to load?. Where does it sit in memory?
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