random number generation CW 5.7 MC9S08RE16

[stevec]

I wish to generate a random number using the rand() function.as in

number = rand();

but I get a warning "No copydown created for initialised object 'seed'. Initialization data lost.

What am I missing? I don't understand what 'copydown' is.

Steve

[stevec]

I have declared and initialised 'seed' (=10000) and used srand(seed) prior to the rand() call. I still get the same warning.

[CrasyCat]

Hello

Are you linking the standard startup file (start08.o) to your application or are you using your own startup function?

Are you building with -D__ONLY_INIT_SP?

seed is a global variable and as such need to be initialized at Startup.

In fact in order to get global variables initialized at Startup I would recommend you to link the standard startup function to your application and to use the standard ANSI c startup code (build without 

-D__ONLY_INIT_SP).

This should avoid the warning.

CrasyCat