下面这个是网上找到的使用DAC0832输出正弦波的汇编程序,请问高手那个正弦波的表格是怎么算出来的,请多多指教,谢谢!

ORG 000H

MAIN: MOV R1,#00H ;取表格初值

LOOP1:;在表格里取数送到指定地址/

MOV A,R1

MOV DPTR,#SETTAB

MOVC A,@A+DPTR

MOV DPTR,#07FFFH

MOVX @DPTR,A

;/

INC R1 ;表格加一

AJMP LOOP1 ;循环

SETTAB:

;正弦表格/

DB 80H,83H,86H,89H,8DH,90H,93H,96H

DB 99H,9CH,9FH,0A2H,0A5H,0A8H,0ABH,0AEH

DB 0B1H,0B4H,0B7H,0BAH,0BCH,0BFH,0C2H,0C5H

DB 0C7H,0CAH,0CCH,0CFH,0D1H, 0D4H,0D6H,0D8H

DB 0DAH,0DDH,0DFH,0E1H,0E3H, 0E5H,0E7H,0E9H

DB 0EAH,0ECH,0EEH,0EFH,0F1H, 0F2H,0F4H,0F5H

DB 0F6H,0F7H,0F8H,0F9H,0FAH, 0FBH,0FCH,0FDH

DB 0FDH,0FEH,0FFH,0FFH,0FFH, 0FFH,0FFH,0FFH

DB 0FFH,0FFH,0FFH,0FFH,0FFH, 0FFH,0FEH,0FDH

DB 0FDH,0FCH,0FBH,0FAH,0F9H, 0F8H,0F7H,0F6H

DB 0F5H,0F4H,0F2H,0F1H,0EFH, 0EEH,0ECH,0EAH

DB 0E9H,0E7H,0E5H,0E3H,0E1H, 0DEH,0DDH,0DAH

DB 0D8H,0D6H,0D4H,0D1H,0CFH, 0CCH,0CAH,0C7H

DB 0C5H,0C2H,0BFH,0BCH,0BAH, 0B7H,0B4H,0B1H

DB 0AEH,0ABH,0A8H,0A5H,0A2H, 9FH, 9CH, 99H

DB 96H, 93H, 90H, 8DH, 89H, 86H, 83H, 80H

DB 80H, 7CH, 79H, 78H, 72H, 6FH, 6CH, 69H

DB 66H, 63H, 60H, 5DH, 5AH, 57H, 55H, 51H

DB 4EH, 4CH, 48H, 45H, 43H, 40H, 3DH, 3AH

DB 38H, 35H, 33H, 30H, 2EH, 2BH, 29H, 27H

DB 25H, 22H, 20H, 1EH, 1CH, 1AH, 18H, 16H

DB 15H, 13H, 11H, 10H, 0EH, 0DH, 0BH, 0AH

DB 09H, 08H, 07H, 06H, 05H, 04H, 03H, 02H

DB 02H, 01H, 00H, 00H, 00H, 00H, 00H, 00H

DB 00H, 00H, 00H, 00H, 00H, 00H, 01H, 02H

DB 02H, 03H, 04H, 05H, 06H, 07H, 08H, 09H

DB 0AH, 0BH, 0DH, 0EH, 10H, 11H, 13H, 15H

DB 16H, 18H, 1AH, 1CH, 1EH, 20H, 22H, 25H

DB 27H, 29H, 2BH, 2EH, 30H, 33H, 35H, 38H

DB 3AH, 3DH, 40H, 43H, 45H, 48H, 4CH, 4EH

DB 51H, 55H, 57H, 5AH, 5DH, 60H, 63H, 66H

DB 69H, 6CH, 6FH, 72H, 76H, 79H, 7CH, 80H

END