about .cmd and .asm files

Hi,

.cmd file is generally a linker command file which defines memory mapped sections for a processor.

Please post your cmd file here.

Regards,

Sid

Please see pages 28, 29 and 30 of the TM320C6000 DSP/BIOS User's guide. 

Now , i attach vecs_timer1.asm:

******************************************************

* Copyright (C) 2003 Texas Instruments Incorporated
* All Rights Reserved
*
*
*---------vecs_timer1.asm---------
*
* Assembly file to set up interrupt service table (IST)
*

*------------------------------------------------------------------------------
* Global symbols defined here and exported out of this file
*------------------------------------------------------------------------------
   .global _vectors
   .global _c_int00
   .global _vector1
   .global _vector2
   .global _vector3
   .global _vector4
   .global _vector5
   .global _vector6
   .global _vector7
   .global _vector8
   .global _vector9  
   .global _vector10
   .global _vector11  
   .global _vector12 
   .global _vector13  
   .global _c_int14  ; Hookup the c_int14 ISR in main()
   .global _vector15

*------------------------------------------------------------------------------
* 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 _c_int14  ; Hookup the c_int14 ISR in main()
_vector15:  VEC_ENTRY _vec_dummy

*------------------------------------------------------------------------------

1        Hi,I don't understand the programme in vecs_timer1.asm file as follows.
******************
VEC_ENTRY .macro addr
    STW   B0,*--B15
    MVKL  addr,B0
    MVKH  addr,B0
    B     B0
    LDW   *B15++,B0
    NOP   2
    NOP  
    NOP  
   .endm
*********************
2         What's the functions about B0 and B15?

           When isr return,are there must 5 instructions followed that are  LDW   *B15++,B0    NOW 2         NOP             NOP?

           Is there must return instruction in the end of isr (c programme)?

3        And in time1.c programme,i don't understand the programme set IRQ as follows:

extern far void vectors();

 IRQ_setVecs(vectors);

I want to know what's the value about ISTP that is the address of IST.

4       Now i use tms320c6713b and I think DSP/BIOS is os on dsp, can i do my work without dsp/bios? What's the difference between DSP/BIOS and no DSP/BIOS project?