LCD1602显示全部字库字符

LCD1602显示全部字库字符、看门狗定时器测试LCD1602液晶内含有192个字符字库，这个程序是分6屏进行显示，整个显示过程长约7秒，看门狗定时器设置时间为8.38秒，刚好显示完全部字符，修改看门狗就可以看到在显示中途重启，比较直观LCD_E BIT P3.4 ;LCD片选LCD_RS BIT P3.5 ;指令、数据位LCD_RW BIT P3.6 ;读、写位PORT EQU P0 ;端口定义WDT_COUNT EQU 0E1H ;看门狗START: LCALL LCD_INIT LCALL WDT_INIT MOV A,#01H ;清屏 LCALL WR_CMDDISP_LOOP: MOV R0,#06H ;循环计数器 MOV R1,#80H ;LCD地址计数器 MOV R2,#00H ;字符表指针计数器 MOV DPTR,#TABWR_DAT_LOOP: MOV A,R1 ;地址命令 LCALL WR_CMD INC R1 ;地址加一 MOV A,R2 ;表指针 MOVC A,A+DPTR LCALL WR_DAT LCALL DELAY100MS INC R2 ;表指针加一 CJNE R1,#90H,BIJIAO ;字符是否到16 MOV R1,#0C0H ;到16，换地址BIJIAO: CJNE R1,#0D0H,WR_DAT_LOOP ;字符数是否到32 MOV R1,#80H ;地址回归 LCALL DELAY1S MOV A,#1B ;清屏 LCALL WR_CMD DJNZ R0,WR_DAT_LOOP MOV WDT_COUNT,#00110111B LJMP DISP_LOOP LCD_INIT: MOV A,#111000B ;8位总线 LCALL WR_CMD MOV A,#10B ;数据指针清零 LCALL WR_CMD MOV A,#01H ;清屏 LCALL WR_CMD MOV A,#1111B ;显示开，光标开，闪烁开 LCALL WR_CMD MOV A,#10000000B ;设置显示地址00H LCALL WR_CMD RETWDT_INIT: MOV WDT_COUNT,#00110111B ;看门狗定时器设置时间1.1秒 RET CHK_BUSY: SETB PORT.7 CLR LCD_RS SETB LCD_RWWAIT1: SETB LCD_E MOV C,PORT.7 JC WAIT1 CLR LCD_E RETWR_CMD: LCALL CHK_BUSY CLR LCD_RS CLR LCD_RW SETB LCD_E MOV PORT,A CLR LCD_E RETWR_DAT: LCALL CHK_BUSY SETB LCD_RS CLR LCD_RW SETB LCD_E MOV PORT,A CLR LCD_E RETDELAY100MS: MOV R7,#10DL5: MOV R6,#250DL4: NOP NOP DJNZ R6,DL4 DJNZ R7,DL5 RETDELAY1S: MOV R7,#10DL1: MOV R6,#200DL2: MOV R5,#248DL3: DJNZ R5,DL3 DJNZ R6,DL2 DJNZ R7,DL1 RETTAB: DB 20H,21H,22H,23H,24H,25H,26H,27H,28H,29H,2AH,2BH,2CH,2DH,2EH,2FH DB 30H,31H,32H,33H,34H,35H,36H,37H,38H,39H,3AH,3BH,3CH,3DH,3EH,3FH DB 40H,41H,42H,43H,44H,45H,46H,47H,48H,49H,4AH,4BH,4CH,4DH,4EH,4FH DB 50H,51H,52H,53H,54H,55H,56H,57H,58H,59H,5AH,5BH,5CH,5DH,5EH,5FH DB 60H,61H,62H,63H,64H,65H,66H,67H,68H,69H,6AH,6BH,6CH,6DH,6EH,6FH DB 70H,71H,72H,73H,74H,75H,76H,77H,78H,79H,7AH,7BH,7CH,7DH,7EH,7FH DB 0A0H,0A1H,0A2H,0A3H,0A4H,0A5H,0A6H,0A7H,0A8H,0A9H,0AAH,0ABH,0ACH,0ADH,0AEH,0AFH DB 0B0H,0B1H,0B2H,0B3H,0B4H,0B5H,0B6H,0B7H,0B8H,0B9H,0BAH,0BBH,0BCH,0BDH,0BEH,0BFH DB 0C0H,0C1H,0C2H,0C3H,0C4H,0C5H,0C6H,0C7H,0C8H,0C9H,0CAH,0CBH,0CCH,0CDH,0CEH,0CFH DB 0D0H,0D1H,0D2H,0D3H,0D4H,0D5H,0D6H,0D7H,0D8H,0D9H,0DAH,0DBH,0DCH,0DDH,0DEH,0DFH DB 0E0H,0E1H,0E2H,0E3H,0E4H,0E5H,0E6H,0E7H,0E8H,0E9H,0E