利用STC89C52單片機(jī)控制LCD1602(不帶中文字庫)顯示的中文
使用STC89C52單片機(jī)控制1602LCD(不帶中文字庫的);利用1602LCD(不帶中文字庫的)中的存儲器(64個字節(jié)00H-3FH)自建立8個5×8點(diǎn)陣的字符從而顯示中文字符。
本文引用地址:http://m.butianyuan.cn/article/201611/316492.htm二、LCD1602的指令集:
1、清屏
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
00 | 00000001 |
運(yùn)行時間(250Khz):1.64ms;
功能:清DDRAM和AC值。
2、歸位
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
00 | 0000001* |
運(yùn)行時間(250Khz):1.64ms;
功能:AC=0,光標(biāo)、畫面回HOME位。
3、輸入方式設(shè)置
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
00 | 000001I/DS |
運(yùn)行時間(250Khz):40us;
功能:設(shè)置光標(biāo)、畫面移動方式。
其中:I/D=1:數(shù)據(jù)讀、寫操作后,AC自動增一;
I/D=0:數(shù)據(jù)讀、寫操作后,AC自動減一;
S=1:數(shù)據(jù)讀、寫操作,畫面平移;
S=0:數(shù)據(jù)讀、寫操作,畫面不動;
4、顯示開關(guān)控制
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
00 | 00001DCB |
運(yùn)行時間(250Khz):40us;
功能:設(shè)置顯示、光標(biāo)及閃爍開、關(guān)。
其中:D表示顯示開關(guān):D=1為開,D=0為關(guān);
C表示光標(biāo)開關(guān):C=1為開,C=0為關(guān);
B表示閃爍開關(guān):B=1為開,B=0為關(guān)。
5、光標(biāo)、畫面位移
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
00 | 0001S/CR/L** |
運(yùn)行時間(250Khz):40us;
功能:光標(biāo)、畫面移動,不影響DDRAM。
其中:S/C=1:畫面平移一個字符位;
S/C=0:光標(biāo)平移一個字符位;
R/L=1:右移;R/L=0:左移。
6、功能設(shè)置
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
00 | 001DLNF** |
運(yùn)行時間(250Khz):40us;
功能:工作方式設(shè)置(初始化指令)。
其中:DL=1,8位數(shù)據(jù)接口;DL=0,四位數(shù)據(jù)接口;
N=1,兩行顯示;N=0,一行顯示;
F=1,5´10點(diǎn)陣字符;F=0,5´7點(diǎn)陣字符。
7、CGRAM地址設(shè)置
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
00 | 01A5A4A3A2A1A0 |
運(yùn)行時間(250Khz):40us;
功能:設(shè)置CGRAM地址。A5~A0=0~3FH。
8、DDRAM地址設(shè)置
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
00 | 1A6A5A4A3A2A1A0 |
運(yùn)行時間(250Khz):40us;
功能:設(shè)置DDRAM地址。
N=0,一行顯示A6~A0=0~4FH;
N=1,兩行顯示,首行A6~A0=00H~2FH,
次行A6~A0=40H~67H。
9、讀BF及AC值
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
01 | BFAC6AC5AC4AC3AC2AC1AC0 |
功能:讀忙BF值和地址計數(shù)器AC值。
其中:BF=1:忙;BF=0:準(zhǔn)備好。
此時,AC值意義為最近一次地址設(shè)置(CGRAM或DDRAM)定義。
10、寫數(shù)據(jù)
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
10 | 數(shù)據(jù) |
運(yùn)行時間(250Khz):40us;
功能:根據(jù)最近設(shè)置的地址性質(zhì),數(shù)據(jù)寫入DDRAM或CGRAM內(nèi)。
11、讀數(shù)據(jù)
RSR/W | DB7DB6DB5DB4DB3DB2DB1DB0 |
11 | 數(shù)據(jù) |
運(yùn)行時間(250Khz):40us;
功能:根據(jù)最近設(shè)置的地址性質(zhì),從DDRRAM或CGRAM數(shù)據(jù)讀出。
三、程序:
//液晶顯示中文-版本0.0
//作者:pcdian
//定義液晶的一些功能位
//RS 為數(shù)據(jù)、指令寄存器選擇位
//RW 為讀寫選擇位
//E 為使能位
RS BIT p2.5
RW BIT P2.6
E BIT P2.7
ORG 0000H
SJMP START
ORG 000BH
LJMP Timer_IT
ORG 0030H
START:MOV SP,#60H
MOV TMOD,#01H
MOV TH0,#0A6H
MOV TL0,#00H
SETB EA
SETB ET0
CLR TR0
MAIN:MOV P0,#01H //清屏
ACALL ENABLE
MOV P0,#38H //顯示模式設(shè)置為16字*2行
ACALL ENABLE
MOV P0,#0CH //不顯示光標(biāo)
ACALL ENABLE
MOV P0,#06H //顯示方向正向且屏不移動
ACALL ENABLE
DISPLAY:ACALL DISPLAY_C0
//我
MOV P0,#80H
ACALL ENABLE
MOV P0,#00H
ACALL WRITE
MOV P0,#81H
ACALL ENABLE
MOV P0,#01H
ACALL WRITE
MOV P0,#82H
ACALL ENABLE
MOV P0,#02H
ACALL WRITE
MOV P0,#0C0H
ACALL ENABLE
MOV P0,#03H
ACALL WRITE
MOV P0,#0C1H
ACALL ENABLE
MOV P0,#04H
ACALL WRITE
MOV P0,#0C2H
ACALL ENABLE
MOV P0,#05H
ACALL WRITE
LCALL DELAY1S
MOV P0,#01H
ACALL ENABLE
ACALL DISPLAY_C1
//們
MOV P0,#83H
ACALL ENABLE
MOV P0,#00H
ACALL WRITE
MOV P0,#84H
ACALL ENABLE
MOV P0,#01H
ACALL WRITE
MOV P0,#85H
ACALL ENABLE
MOV P0,#02H
ACALL WRITE
MOV P0,#0C3H
ACALL ENABLE
MOV P0,#03H
ACALL WRITE
MOV P0,#0C4H
ACALL ENABLE
MOV P0,#04H
ACALL WRITE
MOV P0,#0C5H
ACALL ENABLE
MOV P0,#05H
ACALL WRITE
LCALL DELAY1S
MOV P0,#01H
ACALL ENABLE
ACALL DISPLAY_C2
//的
MOV P0,#86H
ACALL ENABLE
MOV P0,#00H
ACALL WRITE
MOV P0,#87H
ACALL ENABLE
MOV P0,#01H
ACALL WRITE
MOV P0,#88H
ACALL ENABLE
MOV P0,#02H
ACALL WRITE
MOV P0,#0C6H
ACALL ENABLE
MOV P0,#03H
ACALL WRITE
MOV P0,#0C7H
ACALL ENABLE
MOV P0,#04H
ACALL WRITE
MOV P0,#0C8H
ACALL ENABLE
MOV P0,#05H
ACALL WRITE
LCALL DELAY1S
MOV P0,#01H
ACALL ENABLE
ACALL DISPLAY_C3
//0
MOV P0,#89H
ACALL ENABLE
MOV P0,#00H
ACALL WRITE
MOV P0,#8AH
ACALL ENABLE
MOV P0,#01H
ACALL WRITE
MOV P0,#0C9H
ACALL ENABLE
MOV P0,#02H
ACALL WRITE
MOV P0,#0CAH
ACALL ENABLE
MOV P0,#03H
ACALL WRITE
LCALL DELAY1S
MOV P0,#01H
ACALL ENABLE
ACALL DISPLAY_C4
//7
MOV P0,#8BH
ACALL ENABLE
MOV P0,#00H
ACALL WRITE
MOV P0,#8CH
ACALL ENABLE
MOV P0,#01H
ACALL WRITE
MOV P0,#0CBH
ACALL ENABLE
MOV P0,#02H
ACALL WRITE
MOV P0,#0CCH
ACALL ENABLE
MOV P0,#03H
ACALL WRITE
//3
MOV P0,#8DH
ACALL ENABLE
MOV P0,#04H
ACALL WRITE
MOV P0,#8EH
ACALL ENABLE
MOV P0,#05H
ACALL WRITE
MOV P0,#0CDH
ACALL ENABLE
MOV P0,#06H
ACALL WRITE
MOV P0,#0CEH
ACALL ENABLE
MOV P0,#07H
ACALL WRITE
LCALL DELAY1S
MOV P0,#01H
ACALL ENABLE
LJMP DISPLAY
DISPLAY_C0:MOV DPTR,#TAB0
MOV R2,#48
ACALL DISPLAY_C
RET
DISPLAY_C1:MOV DPTR,#TAB1
MOV R2,#48
ACALL DISPLAY_C
RET
DISPLAY_C2:MOV DPTR,#TAB2
MOV R2,#48
ACALL DISPLAY_C
RET
DISPLAY_C3:MOV DPTR,#TAB3
MOV R2,#32
ACALL DISPLAY_C
RET
DISPLAY_C4:MOV DPTR,#TAB4
MOV R2,#64
ACALL DISPLAY_C
RET
DISPLAY_C:MOV P0,#40H
ACALL ENABLE
MOV R3,#0
DISPLAY_CC:MOV A,R3
MOVC A,@A+DPTR
MOV P0,A
LCALL WRITE
INC R3
DJNZ R2,DISPLAY_CC
RET
ENABLE:
CLR RS
CLR RW
CLR E
ACALL DELAY
SETB E
RET
WRITE:
SETB RS
CLR RW
CLR E
ACALL DELAY
SETB E
RET
DELAY1S:SETB TR0
CJNE R0,#20,DELAY1S
CLR TR0
MOV R0,#0
RET
DELAY:MOV R5,#08H
L1:MOV R4,#0FAH
L0:DJNZ R4,L0
DJNZ R5,L1
RET
Timer_IT:MOV TH0,#0A6H
MOV TL0,#00H
INC R0
RETI
TAB0: //我
DB 0x00,0x07,0x01,0x01,0x01,0x1F,0x01,0x01
DB 0x19,0x01,0x01,0x01,0x01,0x1F,0x01,0x01
DB 0x00,0x08,0x04,0x04,0x00,0x1F,0x00,0x04
DB 0x01,0x07,0x19,0x01,0x01,0x01,0x05,0x02
DB 0x18,0x00,0x00,0x01,0x06,0x00,0x00,0x00
DB 0x14,0x18,0x10,0x08,0x09,0x05,0x03,0x01
TAB1: //們
DB 0x01,0x01,0x02,0x02,0x06,0x04,0x0c,0x14
DB 0x08,0x04,0x06,0x04,0x10,0x10,0x10,0x10
DB 0x00,0x00,0x1e,0x02,0x02,0x02,0x02,0x02
DB 0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00
DB 0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x00
DB 0x02,0x02,0x02,0x02,0x02,0x0a,0x04,0x00
TAB2: //的
DB 0x02,0x02,0x04,0x0f,0x08,0x08,0x08,0x0f
DB 0x02,0x02,0x02,0x13,0x14,0x14,0x18,0x12
DB 0x00,0x00,0x00,0x1e,0x02,0x02,0x02,0x02
DB 0x08,0x08,0x08,0x08,0x0f,0x08,0x08,0x00
DB 0x11,0x11,0x10,0x10,0x10,0x10,0x00,0x00
DB 0x02,0x12,0x12,0x02,0x02,0x14,0x08,0x00
TAB3: //0
DB 0x00,0x00,0x03,0x04,0x08,0x08,0x08,0x08
DB 0x00,0x00,0x18,0x04,0x02,0x02,0x02,0X02
DB 0x08,0x08,0x08,0x08,0x04,0x03,0x00,0x00
DB 0x02,0x02,0x02,0x02,0x04,0x18,0x00,0x00
TAB4: //7
DB 0x00,0x00,0x0F,0x0F,0x00,0x00,0x00,0x00
DB 0x00,0x00,0x1E,0x1E,0x06,0x06,0x06,0X06
DB 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
DB 0x06,0x06,0x06,0x06,0x06,0x06,0x00,0x00
//3
DB 0x00,0x00,0x0F,0x0F,0x00,0x00,0x00,0x0F
DB 0x00,0x00,0x1E,0x1E,0x06,0x06,0x06,0X1E
DB 0x0F,0x00,0x00,0x00,0x0F,0x0F,0x00,0x00
DB 0x1E,0x06,0x06,0x06,0x1E,0x1E,0x00,0x00
END
四、總結(jié):
雖然LCD1602可以利用自建字符顯示中文,但最多不能超過8個字符位。所以實際應(yīng)用中,無法同時顯示“我們的073”。該段程序沒來得及優(yōu)化,沒有充分利用單片機(jī)做重復(fù)的事情的優(yōu)點(diǎn);并且使代碼量增大,可讀較差(重復(fù)的,看起來頭暈);注釋少也致使可讀性差!
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