【正文】 。取行號(hào) MOV R3,0FFH 。置循環(huán)次數(shù)PINT03: RRC A INC R3 JNC PINT03PINT04: MOV A,R3 CLR C RLC A RLC A ADD A,R1 MOV MRD,A 。鍵號(hào)存于MRD單元中 RET。====================延時(shí)35Ms子程序 ============================DY35MS: MOV R6,175L2E: MOV R4,2L3E: MOV R5,32 DJNZ R5,$ DJNZ R4,L3E DJNZ R6,L2E RET。====================延時(shí)30Ms子程序 ==============================DY30MS: MOV R6,150L2C: MOV R4,2L3C: MOV R5,32 DJNZ R5,$ DJNZ R4,L3C DJNZ R6,L2C RET。====================延時(shí)20Ms子程序 =============================DY20MS: MOV R6,100L2: MOV R4,2L3: MOV R5,32 DJNZ R5,$ DJNZ R4,L3 DJNZ R6,L2 RET。====================延時(shí)10Ms子程序 ===============================DY10MS: MOV R6,50L2A: MOV R4,2L3A: MOV R5,32 DJNZ R5,$ DJNZ R4,L3A DJNZ R6,L2A RET RET 。====================延時(shí)5Ms子程序 ===============================DY5MS: MOV R6,25L2B: MOV R4,2L3B: MOV R5,32 DJNZ R5,$ DJNZ R4,L3B DJNZ R6,L2B RET。====================延時(shí)4700US子程序 ===========================DY4700US: MOV R6,47L2F: MOV R4,2L3F: MOV R5,15 DJNZ R5,$ DJNZ R4,L3F DJNZ R6,L2F RET。====================延時(shí)1400US子程序 ===========================DY1400US: MOV R6,14L2G: MOV R4,2L3G: MOV R5,15 DJNZ R5,$ DJNZ R4,L3G DJNZ R6,L2G RET。====================延時(shí)882us子程序 =============================DY882US: MOV R6,6L2D: MOV R4,2L3D: MOV R5,23 DJNZ R5,$ DJNZ R4,L3D DJNZ R6,L2D RET。================LCD初始化子程序==============================LCD_INIT: MOV P1,01H 。清屏并光標(biāo)復(fù)位 LCALL WR_CODE 。調(diào)用寫入命令子程序 MOV P1,02H 。光標(biāo)返回 LCALL WR_CODE 。調(diào)用寫入命令子程序 MOV P1,038H 。5x7的點(diǎn)陣字符 LCALL WR_CODE 。調(diào)用寫入命令子程序 MOV P1,06H。 ；光標(biāo)右移 LCALL WR_CODE 。調(diào)用寫入命令子程序 MOV P1,0FH 。開顯示，光標(biāo)閃爍 LCALL WR_CODE 。調(diào)用寫入命令子程序 MOV P1,080H 。寫入顯示起始地址（第一行第一個(gè)位置） LCALL WR_CODE 。調(diào)用寫入命令子程序 MOV A,MRD CJNE A,01H,LCD1 MOV DPTR,TAB3 JMP LCDALCD1: CJNE A,02H,LCD2 MOV DPTR,TAB4 JMP LCDALCD2: CJNE A,03H,LCD3 MOV DPTR,TAB5 JMP LCDALCD3: CJNE A,04H,LCD4 MOV DPTR,TAB6 JMP LCDALCD4: MOV DPTR,TAB1 。送數(shù)據(jù)表1,jingyehanxingLCDA: LCALL WRITE1 MOV P1,0C0H 。第二行的第一個(gè)位置 LCALL WR_CODE JB SJ00,LCD5 。定時(shí)2小時(shí)的處理 JB SJ01,LCD6 JB SJ02,LCD7 MOV DPTR,TAB2 JMP LCDBLCD5: MOV DPTR,TAB7 JMP LCDBLCD6: MOV DPTR,TAB8 JMP LCDBLCD7: MOV DPTR,TAB9LCDB: LCALL WRITE1 RET。======================寫數(shù)據(jù)子程序==================================WR_DATA: MOV P1,A SETB RS 。RS=1 CLR RW 。RW=0 。準(zhǔn)備寫入數(shù)據(jù) CLR E 。E=0 。執(zhí)行顯示命令 LCALL BUSY 。判斷液晶模塊是否忙? SETB E 。E=1 。顯示完成,程序停車 RET。======================寫命令子程序=================================WR_CODE: CLR RS 。寫入控制命令的子程序 CLR RW CLR E LCALL BUSY SETB E RET。======================判斷忙碌子程序==============================BUSY: MOV P1,0FFH 。判斷液晶顯示器是否忙的子程序 CLR RS SETB RW CLR E NOP SETB E JB ,BUSY 。 RET。 =================讀取數(shù)據(jù)表并將數(shù)據(jù)寫入子程序====================WRITE1: MOV R1,00HA1: MOV A,R1 MOVC A,@A+DPTR LCALL WR_DATA INC R1 CJNE A,00H,A1 RET。==================================================================TAB1:。檔位00DB 53H,54H,41H,4CH,4CH,3AH,30H,30H,20H,20H,20H,20H,20H,20H,20H,20HTAB2:。定時(shí)0DB 54H,49H,4DH,45H,3AH,30H,30H,73H,20H,20H,20H,20H,20H,20H,20H,20H。STALL:01 檔位11TAB3:DB 53H,54H,41H,4CH,4CH,3AH,30H,31H,20H,20H,20H,20H,20H,20H,20H,20H。STALL:02 TAB4:DB 53H,54H,41H,4CH,4CH,3AH,30H,32H,20H,20H,20H,20H,20H,20H,20H,20H。STALL:03TAB5:DB 53H,54H,41H,4CH,4CH,3AH,30H,33H,20H,20H,20H,20H,20H,20H,20H,20H。STALL:04 TAB6:DB 53H,54H,41H,4CH,4CH,3AH,30H,34H,20H,20H,20H,20H,20H,20H,20H,20H。TIME:30sTAB7:DB 54H,49H,4DH,45H,3AH,33H,30H,73H,20H,20H,20H,20H,20H,20H,20H,20H。TIME:60sTAB8:DB 54H,49H,4DH,45H,3AH,36H,30H,73H,20H,20H,20H,20H,20H,20H,20H,20H。TIME:300sTAB9:DB 54H,49H,4DH,45H,3AH,33H,30H,30H,73H,20H,20H,20H,20H,20H,20H,20H,20HEND