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1、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_EBITP3.4;LCD片选LCD_RSBITP3.5;指令、数据位LCD_RWBITP3.6;读、写位PORTEQUP0;端口定义WDT_COUNTEQU0E1H;看门狗START:LCALLLCD_INITLCALLWDT_INITMOVA,#01H;清屏LCALLWR_CMDDISP_LOOP:MOV
2、R0,#06H;循环计数器MOVR1,#80H;LCD地址计数器MOVR2,#00H;字符表指针计数器MOVDPTR,#TABWR_DAT_LOOP:MOVA,R1;地址命令LCALLWR_CMDINCR1;地址加一MOVA,R2;表指针MOVCA,@A+DPTRLCALLWR_DATLCALLDELAY100MSINCR2;表指针加一CJNER1,#90H,BIJIAO;字符是否到16MOVR1,#0C0H;到16，换地址BIJIAO:CJNER1,#0D0H,WR_DAT_LOOP;字符数是否到32MOVR1,#80H;地址回归LCALLDE
3、LAY1SMOVA,#1B;清屏LCALLWR_CMDDJNZR0,WR_DAT_LOOPMOVWDT_COUNT,#00110111BLJMPDISP_LOOPLCD_INIT:MOVA,#111000B;8位总线LCALLWR_CMDMOVA,#10B;数据指针清零LCALLWR_CMDMOVA,#01H;清屏LCALLWR_CMDMOVA,#1111B;显示开，光标开，闪烁开LCALLWR_CMDMOVA,#10000000B;设置显示地址00HLCALLWR_CMDRETWDT_INIT:MOVWDT_COUNT,#00110111B;看
4、门狗定时器设置时间1.1秒RETCHK_BUSY:SETBPORT.7CLRLCD_RSSETBLCD_RWWAIT1:SETBLCD_EMOVC,PORT.7JCWAIT1CLRLCD_ERETWR_CMD:LCALLCHK_BUSYCLRLCD_RSCLRLCD_RWSETBLCD_EMOVPORT,ACLRLCD_ERETWR_DAT:LCALLCHK_BUSYSETBLCD_RSCLRLCD_RWSETBLCD_EMOVPORT,ACLRLCD_ERETDELAY100MS:MOVR7,#10DL5:MOVR6,#250DL4:NOPNO
5、PDJNZR6,DL4DJNZR7,DL5RETDELAY1S:MOVR7,#10DL1:MOVR6,#200DL2:MOVR5,#248DL3:DJNZR5,DL3DJNZR6,DL2DJNZR7,DL1RETTAB:DB20H,21H,22H,23H,24H,25H,26H,27H,28H,29H,2AH,2BH,2CH,2DH,2EH,2FHDB30H,31H,32H,33H,34H,35H,36H,37H,38H,39H,3AH,3BH,3CH,3DH,3EH,3FHDB40H,41H,42H,43H,44H,45H,46H,47H,48
6、H,49H,4AH,4BH,4CH,4DH,4EH,4FHDB50H,51H,52H,53H,54H,55H,56H,57H,58H,59H,5AH,5BH,5CH,5DH,5EH,5FHDB60H,61H,62H,63H,64H,65H,66H,67H,68H,69H,6AH,6BH,6CH,6DH,6EH,6FHDB70H,71H,72H,73H,74H,75H,76H,77H,78H,79H,7AH,7BH,7CH,7DH,7EH,7FHDB0A0H,0A1H,0A2H,0A3H,0A4H,0A5H,0A6H,0A7H,0A8H,0A9H,
7、0AAH,0ABH,0ACH,0ADH,0AEH,0AFHDB0B0H,0B1H,0B2H,0B3H,0B4H,0B5H,0B6H,0B7H,0B8H,0B9H,0BAH,0BBH,0BCH,0BDH,0BEH,0BFHDB0C0H,0C1H,0C2H,0C3H,0C4H,0C5H,0C6H,0C7H,0C8H,0C9H,0CAH,0CBH,0CCH,0CDH,0CEH,0CFHDB0D0H,0D1H,0D2H,0D3H,0D4H,0D5H,0D6H,0D7H,0D8H,0D9H,0DAH,0DBH,0DCH,0DDH,0DEH,0DFHDB0E
8、0H,0E1H,0E2H,0E3H,0E4H,0E5H,0E6H,0E7H,0E8H,0E9H,0EAH,0EBH,0ECH,0EDH,
