topic start up code in CodeWarrior for MCU

start up code

Vijays — Thu, 22 Jan 2009 22:27:59 GMT

hello
I'm beginning freescale with flexis mc9s08qe128.i want to know what the start-up code contains in code warrior.do i have to set anything in that or code warrior generate itself. please reply with good answer for the beginner and what i have to know about the code warrior

Thanks in advance

Re: start up code

stanish — Thu, 22 Jan 2009 22:57:33 GMT

Hi Vijay s,

The default C project startup code is mainly responsible for :

* Stack Pointer initialization
* zero out RAM areas where data is allocated
* copy initialization data from ROM to RAM (e.g. Initialization of global and static variables)
* jump to the main() function

CodeWarrior generates entire project including startup code, selected MCU's header files, ANSI C library,... if you create new project by default.

There is the options "minimal startup code" vs. "ANSI startup code" available that influence startup code when new C project is created. The "ANSI startup code" is the default option and causes that all the actions above are executed during startup whereas "minimal startup code" initializes just Stack Pointer and calls main().

Stanish

Re: start up code

Vijays — Fri, 23 Jan 2009 22:04:17 GMT

Thanks for your reply stanish.