[avr-gcc-list] New list member, and bootloader question

[Mike van Meeteren]

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Good evening,

Just wanted to throw a quick hello out to the group.  I'm a 
hardware/software engineer, and one of the pieces I deal with are the AVR 
parts from Atmel.  I started using the GCC compiler about a month ago for a 
variety of little projects, and I must say it's a pretty slick setup.

I've been writing software for roughly 10 years for a variety of platforms, 
including Windows, Unix, and a bunch of embedded processors.  I recently 
got tasked with writing a bootloader for a ATMega16.  I've figured out most 
of the parts, including some unexpected nuances of the routines (for 
example, you can not repeatedly call the boot_erase routine to erase an 
entire chip, and calling fill,erase,flash in that order, doesn't work 
either).

My question is how do I make the compiler generate the stack and register 
setup at the bootloader location instead of at 0x0000 and how do I make the 
data (in this case an ID string I send out the serial port) get located 
there instead of in program space?  I currently just used inline assembly 
to set the stack up, but I can't quite figure out how to make the linker 
stick the data in the bootloader area.

My goal is to set the bootsector fuse so it always goes to the loader, and 
runs the program from the loader.   This will allow me to screw up 
reflashing the program and still have a usable boot loader.

Anyway, sorry for asking a question right out of the gate, but I would 
really appreciate a pointer in the right direction.

-Mike
--
Mike vanMeeteren          address@hidden        FASTechnologies Corp.
Track Hauler: 2001 F150  Track toy: 89 Mustang LX 351W  10.93 @ 122.5 MPH


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