Imagecraft c compiler and development environment for the atmel avr

ICCV8 for AVR – C Compiler for Atmel AVR2. Insert _StackCheck(); in your code where you want to check the stacks foroverflow. This may be anywhere in your code, e.g. inside your Watchdog Timerfunction.3. When _StackCheck() detects a stack overflow, it calls the function_StackOverflowed() with an integer argument with a value of 1 to indicatethat the hardware stack has overflowed, and a value of 0 to indicate that thesoftware stack has overflowed.4. The default _StackOverflowed() library function jumps to location 0 andresets the program. To change this default behavior, write your own_StackOverflowed function in your source code. This will override the defaultone. For program debugging, your _StackOverflowed function should dosomething to indicate a catastrophic condition, perhaps by blinking a LED. If youare using a debugger, you can set a breakpoint at the _StackOverflowedfunction to see if it gets called.The prototypes for these two functions are listed in the header file AVRdef.h.SentinelsThe startup code writes a sentinel byte at the address just above the data area and asimilar byte at the address just above the software stack. If the sentinel bytes getchanged, then a stack overflow has occurred.Note that if you are using dynamic memory allocation, you must skip the sentinel byteat _bss_end for your heap allocation. See Standard Library And Memory AllocationFunctions.107