DSP指令（转）

1万 · 2011-12-17 16:17

挺好的，一个简单而非常合适的DSP的指令方式程序，结合注解的。
T             .set       00EH
BRC             .set 01AH
SWWSR       .set       028H
CLKMD       .set 058H

DAT0       .set       000H
DAT1       .set       001H
DAT2       .set       002H
DAT3       .set       003H
DDAT0       .set       02104H
DDAT1       .set       02105H
DDAT2       .set       02106H
DDAT3       .set       02107H
PDAT0       .set       01f00H
PDAT1       .set       01f01H
PDAT2       .set       01f02H
PDAT3       .set       01f03H

            .def       _main
            .def       _c_int00
            .def _DELAY
            .text
_c_int00:
            RPT             #1000H
            NOP
            LD                #40H,DP
            STM             #4000H ,SP
            ADDM       #7FFH,*(SP)
            ANDM       #0FFFEH,*(SP)
         SSBX       INTM                                     ;禁止中断
            STM       #07FFFH,SWWSR                      ;置外部等待时间
            STM             #06004H,CLKMD
            LD             #0FFFFH,A
            CALL       _DELAY
            STM             #087FBH,CLKMD
            LD             #0FFFFH,A
            CALL       _DELAY
            B             _main
_main:
            RSBX       CPL
            NOP
            NOP
            LD                #1234h,A                                     ;立即数寻址
            ST                #5678h,*(DDAT1)
            NOP
            NOP
            NOP


            LD                #PDAT1,A                               ;累加器寻址
            READA       DAT2
            NOP
            NOP
            NOP

            ST                #3210h,DAT3                               ;直接寻址(DP指针)
            NOP
            NOP
            NOP

            SSBX       CPL
            NOP
            NOP
            NOP
            ST                #9876h,DAT3                               ;直接寻址(SP指针)
            NOP
            NOP
            NOP
            RSBX       CPL
            NOP
            NOP
            NOP

            STM       #DDAT3,AR0                               ;间接寻址
            ST       #9876h,*AR0
            NOP
            NOP
            NOP

            MVDK       DAT0,DDAT0                               ;绝对地址(dmad)寻址
            MVKD       DDAT1,DAT1
            NOP
            NOP
            NOP

            MVDP       DAT0,PDAT0                               ;绝对地址(pmad)寻址

1万 · 2011-12-17 16:17

MVDP       DAT1,PDAT1
            NOP
            NOP
            NOP

            STM       #8888h,T                               ;存储器映射寄存器寻址
            NOP
            NOP
            NOP

            PSHM       T                                              ;堆栈寻址
            POPM       T
            NOP
            NOP
            NOP

            STM       #4000h,AR0                               ;程序存储器到数据存储器的复制
            RPT       #0xff
            MVPD       1000H,*AR0+
            NOP
            NOP
            NOP

            STM             #DDAT2,AR2
            STM             #DDAT3,AR2
            SSBX       FRCT
            SSBX       OVM
            NOP
            NOP
            MVDD       *AR2+,*AR3+
            NOP
            NOP                                              ;双操作数寻址
            MAC             *AR2+,*AR3+,A
            NOP
            NOP
            NOP
            RSBX       FRCT
            RSBX       OVM
            NOP
            NOP
            SSBX       CPL
            B             $
_DELAY:       STLM       A,BRC
            RPTB       _DELAY1-1
            NOP
            NOP
            NOP
            NOP
_DELAY1:RET
            .end