at89s51试验教程第四章22(编辑修改稿)

at89s51试验教程第四章22(编辑修改稿)内容摘要：

MOV KEYBUF,10 LJMP DK3 NK11: CJNE A,07H,NK12 MOV KEYBUF,11 LJMP DK3 NK12: NOP DK3: MOV A,KEYBUF MOV DPTR,TABLE MOVC A,@A+DPTR MOV P0,A MOV A,KEYBUF MOV B,2 MUL AB MOV TEMP,A MOV DPTR,TABLE1 MOVC A,@A+DPTR MOV STH0,A MOV TH0,A INC TEMP MOV A,TEMP MOVC A,@A+DPTR MOV STL0,A MOV TL0,A SETB TR0 DK3A: MOV A,P3 ANL A,0FH XRL A,0FH JNZ DK3A CLR TR0 NOKEY3: MOV P3,0FFH CLR MOV A,P3 ANL A,0FH XRL A,0FH JZ NOKEY4 LCALL DELY10MS MOV A,P3 ANL A,0FH AT89S51单片机实验及实践教程 128 XRL A,0FH JZ NOKEY4 MOV A,P3 ANL A,0FH CJNE A,0EH,NK13 MOV KEYBUF,12 LJMP DK4 NK13: CJNE A,0DH,NK14 MOV KEYBUF,13 LJMP DK4 NK14: CJNE A,0BH,NK15 MOV KEYBUF,14 LJMP DK4 NK15: CJNE A,07H,NK16 MOV KEYBUF,15 LJMP DK4 NK16: NOP DK4: MOV A,KEYBUF MOV DPTR,TABLE MOVC A,@A+DPTR MOV P0,A MOV A,KEYBUF MOV B,2 MUL AB MOV TEMP,A MOV DPTR,TABLE1 MOVC A,@A+DPTR MOV STH0,A MOV TH0,A INC TEMP MOV A,TEMP MOVC A,@A+DPTR MOV STL0,A MOV TL0,A SETB TR0 DK4A: MOV A,P3 ANL A,0FH XRL A,0FH JNZ DK4A CLR TR0 NOKEY4: LJMP WAIT DELY10MS: MOV R6,10 D1: MOV R7,248 DJNZ R7,$ DJNZ R6,D1 AT89S51单片机实验及实践教程 129 RET INT_T0: MOV TH0,STH0 MOV TL0,STL0 CPL RETI TABLE: DB 3FH,06H,5BH,4FH,66H,6DH,7DH,07H DB 7FH,6FH,77H,7CH,39H,5EH,79H,71H TABLE1: DW 64021,64103,64260,64400 DW 64524,64580,64684,64777 DW 64820,64898,64968,65030 DW 65058,65110,65157,65178 END 7． C 语言源程序 include unsigned char code table[]={0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c,。