vecs.asm

对于初学dsp的人来说

**************************************************************
*  Copyright (C), 2007 by SEED Electronic Technology LTD.
*  FileName: vecs.asm
*  Author:  Ya.X      Version : V1.0         Date:2007-09-20
*  Description:
**************************************************************

*-------------------------------------------------------------
* Global symbols defined here and exported out of this file
*-------------------------------------------------------------
   .global _vectors

*-------------------------------------------------------------------------
* Global symbols referenced in this file but defined somewhere else. 
* Remember that your interrupt service routines need to be referenced here.
*-------------------------------------------------------------------------
   .ref _c_int00

*---------------------------------------------------------------------------
* This is a macro that instantiates one entry in the interrupt service table.
*---------------------------------------------------------------------------
VEC_ENTRY .macro addr
    STW   B0,*--B15
    MVKL  addr,B0
    MVKH  addr,B0
    B     B0
    LDW   *B15++,B0
    NOP   2
    NOP   
    NOP   
   .endm


*------------------------------------------------------------------------------
* This is a dummy interrupt service routine used to initialize the IST.
*------------------------------------------------------------------------------
_vec_dummy:
  B    B3
  NOP  5

*------------------------------------------------------------------------------
* This is the actual interrupt service table (IST). It is properly aligned and
* is located in the subsection .text:vecs. This means if you don't explicitly
* specify this section in your linker command file, it will default and link
* into the .text section. Remember to set the ISTP register to point to this
* table.
*------------------------------------------------------------------------------
	.sect   ".text:vecs"
	.align  1024

_vectors:
_vector0:   VEC_ENTRY _c_int00    ;RESET
_vector1:   VEC_ENTRY _vec_dummy  ;NMI
_vector2:   VEC_ENTRY _vec_dummy  ;RSVD
_vector3:   VEC_ENTRY _vec_dummy
_vector4:   VEC_ENTRY _vec_dummy
_vector5:   VEC_ENTRY _vec_dummy
_vector6:   VEC_ENTRY _vec_dummy
_vector7:   VEC_ENTRY _vec_dummy
_vector8:   VEC_ENTRY _vec_dummy
_vector9:   VEC_ENTRY _vec_dummy
_vector10:  VEC_ENTRY _vec_dummy
_vector11:  VEC_ENTRY _vec_dummy
_vector12:  VEC_ENTRY _vec_dummy
_vector13:  VEC_ENTRY _vec_dummy
_vector14:  VEC_ENTRY _vec_dummy  ; Hookup the c_int14 ISR in main()
_vector15:  VEC_ENTRY _vec_dummy