topic #pragma use in Classic/Legacy CodeWarrior

#pragma use

NeedHelp — Tue, 29 Apr 2008 05:38:48 GMT

Dear all,
I still do not understand how to use variable(s) declared using the #pragma DATA_SEG syntax. You are dealing with a novince programmer - needless to say - so please bare with me and my questions!

1. I want to store a bunch of variables in data memory inside my bootloader code like a int *, int [], char etc. at memory location(s) ALPHA, BETA, THETA.. etc (for argument sake lets assume these addresses are valid).

My bootloader invokes my RTOS code ( In Keil I simply do: ((void (code *) (void)) CVECT_BOOT)(); - the bootloader transfers control over to the RTOS residing at address location CVECT_BOOT - Still need to figure how to do this in CW but thats another question Ill be bothering you later with). Once inside my RTOS how do I access those same variables declared and defined in my bootloader? For this I am assuming I need to know the "physical" address location and not the "name" of my data segment?

2. What would I do if I needed to do the same thing but this time my information is in program memory and not in data memory? I want to share my decode and encode array for manchester encoding in program memory.

Since my foundation is so shaky I would appreciate if you could suggest some books/notes as well.

Thanks.

NeedHelp - no kiddin!

Re: #pragma use

ubhims — Tue, 29 Apr 2008 14:04:14 GMT

I'm assuming that you're using CodeWarrior for HC08.

Please refer to the Compiler Manual (Using the Compiler -> Compiler Pragmas section). It has good information on #pragma DATA_SEG.

-Mandeep

Re: #pragma use

NeedHelp — Tue, 06 May 2008 01:47:05 GMT

I am using Metroweks Codewarrior and my target is a 8014. I have attached my Installed Pluggins file. Thanks.

Installed_Plugins1.txt

Message Edited by t.dowe on 2009-10-15 05:47 PM

Re: #pragma use

trytohelp — Tue, 06 May 2008 16:43:10 GMT

Hi,

you have paosted another question how to put variable at specific address.

It seems to be the same isn't it ?

Pascal

Re: #pragma use

NeedHelp — Wed, 07 May 2008 22:22:14 GMT

yes thank you now i know how to use the pragma notation. sorry bout multiple posts this is my first time using online help.

Re: #pragma use

trytohelp — Thu, 08 May 2008 14:10:41 GMT

Hi,

Thanks for the feedback

Don't hesitate to contact us

Pascal