李现路：在DSP6000中怎样编写您的第一个程序(二)

三、完整的中断向量表程序如下：

 

 

   .global _vectors ;定义一个能被外部（C语言程序）引用的变量

   .global _c_int00

   .global _vector1

   .global _vector2

   .global _vector3

   .global _vector1

   .global _vector5

   .global _vector6

   .global _vector7

   .global _vector8

   .global _vector9         

   .global _vector10

   .global _vector11 ; Hookup the c_int08 ISR(连接这个中断设置寄存器） in main()

   .global _vector12    ; Hookup the c_int08 ISR in main()

   .global _vector13 

   .global _vector14 

   .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 ;reset ISR（复位中断设置寄存）， .ref表明一个或多个在另一个模块中定义而在前模块中要用到的符号

 

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

* This is a macro that instantiates one entry in the interrupt service table.

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

VEC_ENTRY .macro addr ;中断返回函数

    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:  ;初始化IST寄存器（中断向量表起始地址寄存器，用于设置中断服务程序存放的地址）

  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（中断向量表起始地址寄存器） register to point to this

* table.

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

 .sect ".vecs"  ;定义初始化带名称的段

 .align 1024  ;分配程序页

 

_vectors:

_vector0:   VEC_ENTRY _c_int00    ;RESET（应用程序的入口）

_vector1:   VEC_ENTRY _vec_dummy  ;NMI（非屏蔽中断，用于处理极为关键的任务）

_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 ; Hookup the c_int08 ISR in main()

_vector12:  VEC_ENTRY _vec_dummy    ; Hookup the c_int08 ISR in main()

_vector13:  VEC_ENTRY _vec_dummy

_vector14:  VEC_ENTRY _vec_dummy

_vector15:  VEC_ENTRY _vec_dummy

 

 

  完整版本请见http://www.51qianru.cn/bbs/

 

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