LCD1602 C语言驱动程序 单片机, designed, C语言, drive

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//lcd1602 drive program电子园51单片机学习网 ` L^)WWj^
//for 51 mcu电子园51单片机学习网e(?%k'b0[ \8f2h\i b
//designed by zhaoliang电子园51单片机学习网&i5zx%R3F l
//2005-6-14 20:16
-Y*A;Nw3f2?Bw E40425＃i nclude <reg51.hJ>
Jw l0rQ2b;@fI40425/********************************************************************/
V2@(A+iLq E7uxBu40425//lcd part
wKB+m&Lb`q o40425#define  LINE1     0
-Ag `?(_NK)VAj40425#define  LINE2     1
[0v#{/el.f(gJ40425#define  LINE1_HEAD    0x80

K]FM[d40425#define  LINE2_HEAD    0xC0电子园51单片机学习网m'_ID3E[
#define  LCD_DELAY_TIME   40
6R2la)K x40425#define  DATA_MODE    0x38电子园51单片机学习网Hj'E@x@3|
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#define  OPEN_SCREEN    0x0C
%aB vn[xOi0V40425#define  DISPLAY_ADDRESS   0x80
RCBh1m2h/T){40425#define  CLEARSCREEN    LCD_en_command(0x01)电子园51单片机学习网_["CT1c;s P
//common part
G:T4OKzi40425#define  HIGH   1电子园51单片机学习网/Y i8MR(~ K9?
#define  LOW    0电子园51单片机学习网5D c^'n~A
#define  TRUE    1电子园51单片机学习网UlkW3Gr/Jg&j a
#define  FALSE    0
{)\$g"t2iP"l Q40425#define  ZERO    0
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O'g#w40425#define  MSB    0x80电子园51单片机学习网n-u"qLvDA
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#define  LSB    0x01电子园51单片机学习网9_3i*c }W{G?.d


jS o1| _-z40425/*******************************************************************/电子园51单片机学习网H!`,X oQ-_
//change this part at different board
;x3xV$\F]c4~`40425#define  LCDIO     P2

x fayd40425sbit LCD1602_RS=P0^7;   //data command select  1 data  0 command  pin 4电子园51单片机学习网3RkP}L
sbit LCD1602_RW=P0^6;   //read write select   1 read   0 write     pin 5电子园51单片机学习网Z(o9E0]+@2N
sbit LCD1602_EN=P0^5;   //LCD enable signal             pin 6
P-U0qh.xIz40425
"j,|H9t+Eam9dh40425/********************************************************************/
5SW]+fD@sl7U40425void LCD_delay(void);//lcd delay function电子园51单片机学习网 Ra t,C H@/c
void LCD_en_command(unsigned char command);//write command function
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Y40425void LCD_en_dat(unsigned char temp);//write data function
p(SX TI.rc6_V40425void LCD_set_xy( unsigned char x, unsigned char y );//set display address function
U$?(o [.a[ c ]k.T40425void LCD_write_char( unsigned x,unsigned char y,unsigned char dat);//write lcd a character function
~-D5H8xdSI3v40425void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s);//write lcd string function电子园51单片机学习网.hv%vX} _
void LCD_init(void);//lcd initize function电子园51单片机学习网 E|:U)mA4h3y

RK&A F/W#a$fc40425/********************************************************************/
0u p/D p2xT40425void delay_nms(unsigned int n);//delay function
eG'I N}O/y7g40425电子园51单片机学习网P}3Zd7{0C9Dd,R
/********************************************************************/电子园51单片机学习网0Dd!?fUr OK9X
void main(void)电子园51单片机学习网&[0mo Bg!z8vF
{
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@k40425 LCD_init();电子园51单片机学习网HA9hLg*l8o&M@"I$F
while(TRUE )   电子园51单片机学习网v.dC%qb-l?7oy
{
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OI3G40425   CLEARSCREEN;电子园51单片机学习网S)v l2dQ
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电子园51单片机学习网4`"y e)_;sCqG
  delay_nms(2);电子园51单片机学习网bC8]gSB
         LCD_write_string(0,LINE1,"   LCD TEST     ");
)vm']eB40425         LCD_write_string(0,LINE2,"   SUCCESSFUL   ");
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b40425      
6k3]Gt ?T0[L5A3Xs40425         delay_nms(200);

l g_6]8_7x40425        
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jz40425         CLEARSCREEN;电子园51单片机学习网}t4] ]!Z4V:f.J
       电子园51单片机学习网2Zy p5gv9@6b4`
  delay_nms(2);
@%P1hVPI40425         LCD_write_string(0,LINE1,"   lcd test     ");电子园51单片机学习网'{4B Q$@
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         LCD_write_string(0,LINE2,"   successful   ");
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m40425        
2D'@.~[*l-kX'}e3Hs40425         delay_nms(200);                 电子园51单片机学习网*u%g^r p9A
}电子园51单片机学习网 Molamo"])p&@C
}电子园51单片机学习网a.zir~#rsyt
/********************************************************************/
lQJ1C[40425/******************** LCD PART *************************************/
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t(~po_;]sai40425void LCD_delay(void)  电子园51单片机学习网s;te/U|@"V
{
dt3B5_,S40425 unsigned char i;电子园51单片机学习网 loGn{
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for(i=LCD_DELAY_TIME;i>ZERO;i--)//be sure lcd reset
H*A IHM0@.{8O$p40425   ;
@,o)iM)?iGX40425}
~h8Pa z(u40425/********************************************************************/ 电子园51单片机学习网;mo$c9Fk&G,z,|z)S
void LCD_en_command(unsigned char command)
zO*uGZG40425{
SeJb#r T'sUt i\40425 LCDIO=command;电子园51单片机学习网-v8T)ehyLY
LCD1602_RS=LOW;  
:qS,\a2^"y|5JWg40425 LCD1602_RW=LOW;
/i.@0{ \Oddop40425 LCD1602_EN=LOW;电子园51单片机学习网Q)B UkK
LCD_delay();
.O)@Hw+F40425 LCD1602_EN=HIGH;
F;q9E*uo#J5h40425}
*X%\o3O N!qW:H40425/********************************************************************/电子园51单片机学习网f6n pi&s
void LCD_en_dat(unsigned char dat)电子园51单片机学习网$lt,{j%v
{电子园51单片机学习网(i
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LCDIO=dat;电子园51单片机学习网QZ*PL2ZU'D
LCD1602_RS=HIGH;电子园51单片机学习网A o8e
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LCD1602_RW=LOW;
SvwN z;O$k40425 LCD1602_EN=LOW;电子园51单片机学习网 L2H/| PU
LCD_delay();
QKN c2XWe*Y40425 LCD1602_EN=HIGH;电子园51单片机学习网OztS@'HOYH
}电子园51单片机学习网~R:b;R!Z,q
/********************************************************************/电子园51单片机学习网f%e8}5I\V4h
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void LCD_set_xy( unsigned char x, unsigned char y )
2PW2vVHZ#e40425{
V&\q$dD9Qfq40425 unsigned char address;
&j&i\FH-XQ40425 if (y == LINE1)
]j%ydGfK+p:i;Z40425  address = LINE1_HEAD + x;
{!LOWQ _2ru!P40425 else电子园51单片机学习网D7i&UVS)v
     address = LINE2_HEAD + x;电子园51单片机学习网L-J2~v}NQM
LCD_en_command(address);电子园51单片机学习网A eh
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}
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et(A40425/********************************************************************/电子园51单片机学习网tY-n$X kv:I ^
void LCD_write_char( unsigned x,unsigned char y,unsigned char dat)
vpmwGi4t+\40425{电子园51单片机学习网W0J S]X
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LCD_set_xy( x, y );电子园51单片机学习网(TDqqU5L x
LCD_en_dat(dat);电子园51单片机学习网(r&gs;O
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}电子园51单片机学习网j4ot!W4\%~
/********************************************************************/电子园51单片机学习网
{ }KuZG-K(?
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)电子园51单片机学习网lg$Ib)n7t
{电子园51单片机学习网 F2o6i]E+l:y G
    LCD_set_xy( X, Y ); //set address电子园51单片机学习网'aKjV*jatpO'V
    while (*s)  // write character电子园51单片机学习网 e#N J%{z2e`(?B
    {电子园51单片机学习网 h/vPn d,{m
     LCDIO=*s;电子园51单片机学习网a {8y ARhfk
        LCD_en_dat(*s);  
9CD!t$ASjh"lf40425 s ++;电子园51单片机学习网%]h]!tfw!S@+?/Xy
    }
7UYwj(n ~3q40425}电子园51单片机学习网;oh|Q K`y5v
/********************************************************************/电子园51单片机学习网ZsZy R+?)zq
void LCD_init(void)电子园51单片机学习网e-x9N$?WhQ
{电子园51单片机学习网1Y3v [cC3s x&e
CLEARSCREEN;//clear screen
}0zyb#m DTt40425 LCD_en_command(DATA_MODE);//set 8 bit data transmission mode电子园51单片机学习网i$};R!U.Z R/W1f'mj5U
LCD_en_command(OPEN_SCREEN);//open display (enable lcd display)电子园51单片机学习网5g r3@i"L.A%IV"HV
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LCD_en_command(DISPLAY_ADDRESS);//set lcd first display address
W'G$P Tbod^q40425 CLEARSCREEN;//clear screen电子园51单片机学习网C1Z_"T q9Ep\V
}电子园51单片机学习网;~K k(gX f:z/T'K
/********************************************************************/

]'w(FjkF[40425/*********************** OTHER PART *********************************/
e;_;n1@| [oqOl{40425void delay_nms(unsigned int n)     
lUF~&eY40425{电子园51单片机学习网@:g"m+ex'SP
    unsigned int i="0",j=0;电子园51单片机学习网t]9~w _*j&f
    for (i=n;i>0;i--)
^uot)l7Wu40425     for (j=0;j<1140;j++);
K1yxZ&~40425}
n7qh:f5z+kM40425/********************************************************************/
CEe QhS40425