Hello,
MCU: at91sam7s256 toolchain: Yagarto (based on gcc-4.2.1)
First image XXX bytes length is burnt on the flash at the very beginning, by address 0x100000; second image resides on the flash at the (0x100000 + XXX). First image prints a short debug message out on DBGU port and then should jump to (0x100000 + XXX) and run the second image, which also prints out DBGU and lights on LED.
What I did:
1) C-startup code of the 1st application is based on some of Atmel's examples 2) C-startup code of the 2nd application:- puts a "dummy" vector table in ROM; this dummy section contains only jump on RESET where remap and etc. being done, other vectors are NOP
- places IRQ handler in to RAM as well
- does remap
Both codes compile cleanly, but the whole thing doesn't work as I expected it to. First application prints, then runs second application, which lights LED on but instead of printing string it outputs some garbage on a DBGU port.
Obviously this issues is related to C-startup code, what could I miss?
Best regards, Roman