Freescale Semiconductor 802.15.4 manual 3 Crt0.c and Crt.h

NOTE

This file can also be used with the MC908HCS08GT60 MCU.

5.3.3 Crt0.c and Crt.h

These files contain the basic initialization code (basic system clock, memory and stack setup). The normal basic init file(s) (like the start08.c from Metrowerks) is not needed when the Embedded Bootloader is embedded.

In an 802.15.4/Zigbee application with Embedded Bootloader, these files only contain the _startupdata structure. The Embedded Bootloader handles all the basic initialization (memory and stack setup) of the application. That is, the application’s main() function will be the first item called (entry point).

NOTE

Do not include basic initialization (memory and stack setup) when building an application with the Embedded Bootloader. Place any necessary initialization function calls in the main() function. Whatever, the initialization function or only the _startupdata structure is included is controlled by compiler #defines. See Section 5.2.1, Compiler Defines Application for more information.

5-4 Embedded Bootloader Reference Manual, Rev 0.0 Freescale Semiconductor