In which file is IER defined in CCS V4?

dongsheng Li

I'm playing with 28035, but confused that I cannot find where the CPU related registers are defined, such as IER/INTM... Can anyone tell me where the file is?

From "DSP2803x_Device.h", I found IER/IFR are declared, but where are they defined? please advise, thank you so much.

//---------------------------------------------------------------------------
// Common CPU Definitions:
//

extern cregister volatile unsigned int IFR;
extern cregister volatile unsigned int IER;

#define EINT   asm(" clrc INTM")
#define DINT   asm(" setc INTM")
#define ERTM   asm(" clrc DBGM")
#define DRTM   asm(" setc DBGM")

over 14 years ago

0 quark over 14 years ago

Expert 2220 points

IER and IFR are special registers and are defined by "cregister".

The compiler handles cregisters differently because they require special assembly output.

For more information:

See section 6.4.2 (The cregister Keyword) in TI Document SPRU514C.

http://www.ti.com/lit/pdf/spru514

For example, the C code:

unsigned int blah;

void dummy( void )
{
IER = 0x0001;
blah = 0xBEEF;
}

----------------- Compiles into the following assembly code:

;----------------------------------------------------------------------
; 55 | IER = 0x0001;
;----------------------------------------------------------------------
        MOVB      AL,#1                 ; |55|
        MOV       IER,AL                ; |55|
;----------------------------------------------------------------------
; 56 | blah = 0xBEEF;
;----------------------------------------------------------------------
        MOVW      DP,#_blah
        MOV       @_blah,#48879         ; |56|

0 dongsheng Li over 14 years ago in reply to quark

Prodigy 70 points

Thank you now I'm clear.

C2000™︎ microcontrollers

C2000 microcontrollers forum

In which file is IER defined in CCS V4?