BootLoader functions use in Application

[redkofka]

Posted on November 20, 2012 at 14:04

My application requires a BOOT loader that loads an application into a FLASH device. I have created two different applications:

A BOOT loader application.  start  0x08000000 A FLASH application.            start 0x08008000

Both has vector tables. 

The FLASH application must call some of the functions in the BOOT loader. Is there a clever way to do this?  I use coocox IDE and stm 103ZE dev board .... Havent you some examples for better understanding? thanks for reply >:-) #bootloader-application-function

[Tesla DeLorean]

Posted on November 20, 2012 at 16:01

You could add function entries into the vector table, or extension thereof.

In RealView you could provide a DEF (definition) file to the linker that pointed to functions at given addresses in a BOOT ROM and the linker would bind to them, the same could probably be achieved with linker script files, or casting. This is probably something I'd avoid in a flash device.

[marknorton9]

Posted on November 21, 2012 at 01:53

As a matter of fact, I just did this today.  I simply created function pointers to those functions that I want to access from the main application.  I created these as const so that they would be stored in flash.  Simply locate these pointers at a location in flash that will not change (like right after the bootloader vectors).