51单片机产生正弦波 
 
 
 
［ 作者：1kic       转贴自：中华IC网     
 
 
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ORG  00H
LJMP MAIN
ORG 0100H
MAIN:
    MOV DPTR,#sinTab
LOOP:
    CLR  A
    MOVC  A,@A+DPTR
    CJNE  A,#129,LOOP1
    AJMP   MAIN
LOOP1:
    MOV P3,A
    INC DPTR
    AJMP LOOP

sinTab:DB 128,132,137,141,146,150,154,159,163,167
       DB 171,176,180,184,188,191,195,199,203,206
       DB 210,213,216,219,222,225,228,231,233,236
       DB 238,240,242,244,246,247,249,250,251,252
       DB 253,254,254,255,255,255,255,255,254,254
       DB 253,252,251,250,249,247,246,244,242,240
       DB 238,236,233,231,228,225,222,219,216,213
       DB 210,206,203,198,195,192,188,184,180,176
       DB 172,167,163,159,155,150,146,141,137,133
       DB 128,124,119,115,111,106,102,97,93,89,85
       DB 81,77,73,69,65,61,57,54,50,47,43,40,37
       DB 34,31,28,25,23,20,18,16,14,12,10,9,7
       DB 6,5,4,3,2,2,1,1,1,1,1,2,2,3,4,5,6
       DB 7,9,10,12,14,16,18,20,23,25,28,30,33,36
       DB 40,43,46,50,53,57,60,64,68,72,76,80,84
       DB 88,93,97,101,106,110,114,119,123,128,129