access C674x CPU Register with CCS5 / CGT version change

Pictures were missing ...

After migration from CCS4 to CCS5 5.1.0.09000 I get a syntax error for the following lines in my main.c file:

extern cregister volatile unsigned int IER;
extern __cregister volatile unsigned int CSR;

(Those lines are identical to the ones from ...\ccsv5\tools\compiler\c6000\include\c6x.h. In that file, no syntax error is shown).

As a consequence, the symbols IER and CSR cannot be resolved. I tried both compiler versions 6.1.14 and 7.3.1. I use those statements on file scope (I also tried as first lines in main.c).

My environment is





Another strange thing: After switching back to CGT 6.1.14, I get the error message:



!CONFIGURATION: {0} [Mon Jan 16 15:16:10 CET 2012]

    !TOOL: {0}

        !WARNING: Unresolved option: com.ti.ccstudio.buildDefinitions.C6000_6.1.compilerID.ABI

My questions:

1) Why does the keyword 'cregister' show in black instead of purple (it is not recognized as keyword in CCS5 and hasn't been in CCS4 either )

2) Can I use both '__cregister' (like in the c6x.h) and 'cregister' (like in spru187t, example 6-1) or is there a difference in behavior?

3) I didn't set the --coffabi compiler option manually, it was set automatically when I switched to CGT 7.3.1 (which is a nice feature but might cause problems). Why doesn't it get removed automatically when switching back to 6.1.14? Are there other settings that are changed when I go from 6.1.14 to 7.3.1 and back?

4) How can I get rid of the syntax error (I wouldn't want to go back to assembler code to modify IER unless there is a compiler directive to reserve one or two registers for my own assembler code)?

Andreas44690 said:

1) Why does the keyword 'cregister' show in black instead of purple (it is not recognized as keyword in CCS5 and hasn't been in CCS4 either )

This is coming from the live syntax checker in the editor.  It recognizes cregister as a valid keyword but not __cregister.  This checker is separate from the compiler, the code should compile fine but the syntax checker in the editor is not aware of all TI special keywords.  The __cregister one will need to be added to our list.  I have filed a defect to track this.  SDSCM00042924

Someone else will respond to the other issues.

john

John, as the other thread appeared again, I will answer in

http://e2e.ti.com/support/development_tools/compiler/f/343/t/158609.aspx#575800

Andi