LCD1602显示汉字字符串程序

#include

<reg51.h>

#define

uchar

unsigned

char

#define

uint

unsigned

int

uchar

xpos

,ypos

sbit

key=P2^0

sbit

rs=P3^0

sbit

rw=P3^1

sbit

e=P3^2

void

nop(){}

void

delay(uint

z)

//延时

{

uint

x,y

for(x=zx>0x--)

for(y=112y>0y--)

}

void

check()

//判忙

{

rs=0

rw=1

e=0

P1=0xff

e=1

nop()

nop()

while(P1&0x80){}

}

void

wrc(uchar

com)

//写指令

{

check()

rs=0

rw=0

e=1

P1=com

nop()

e=0

nop()

}

void

wrd(uchar

date)

//写数据

{

check()

rs=1

rw=0

e=1

P1=date

nop()

e=0

nop()

}

void

init()

//初始化

{

wrc(0x38)

wrc(0x01)

wrc(0x0c)

wrc(0x06)

}

void

lcdpos()

//内部数据地址指针定位

{

xpos&=0x01

ypos&=0x1f

if(xpos==0x00)

wrc(ypos|0x80)

else

wrc((ypos+0x40)|0x80)

}

void

lcdw(uchar

x,uchar

y,uchar

*s)

//在指定的坐标下写字符串

{

xpos=x

for(ypos=yypos<20ypos++)

{

lcdpos()

wrd(*s)

s++

}

}

void

main()

{

init()

cgram()

while(1)

{

lcdw(0,0,"##########

")

lcdw(1,1,"!!!!!!!!!!

")

lcdw(2,2,"&&&&&&&&&&

")

lcdw(3,3,"$$$$$$$$$$

")

}

}

LCD有哪些寄存器？各表示什么含义，控制什么功能？

写出来的程序又如何验证是否正确？

其实，你只需要对LCD的打开、关闭，以及能把一个数据块显示在LCD上就行了

“常见字母、数字、符号、中文、自定义字符、图形，以及文字和图形混和显示；光标显示/隐藏（Cursor

on/off）、显示字符闪烁（Display

character

blink)；画面清除（Display

clear）、光标归位（Return

home）”

这些功能，只需要在这个数据块上进行 *** 作，然后再送到LCD显示。

//端口定义 诺基亚5110显示屏

int LCD_CE=2

int LCD_RST=3

int SCLK=4

int SDIN=5

int LCD_DC=6

int inputPin=8 // 定义超声波信号接收接口

int outputPin=9// 定义超声波信号发出接口

/****************************************************************/

void setup()

{

pinMode(inputPin, INPUT)

pinMode(outputPin, OUTPUT)

}

//****************************定义ASCII字符**********************//

/**********************************

6 x 8 font

1 pixel space at left and bottom

index = ASCII - 32

***********************************/

const unsigned char font6x8[][6] =

{

{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, // sp

{ 0x00, 0x00, 0x00, 0x2f, 0x00, 0x00 }, // !

{ 0x00, 0x00, 0x07, 0x00, 0x07, 0x00 }, // "

{ 0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14 }, // #

{ 0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12 }, // $

{ 0x00, 0x62, 0x64, 0x08, 0x13, 0x23 }, // %

{ 0x00, 0x36, 0x49, 0x55, 0x22, 0x50 }, // &

{ 0x00, 0x00, 0x05, 0x03, 0x00, 0x00 }, // '

{ 0x00, 0x00, 0x1c, 0x22, 0x41, 0x00 }, // (

{ 0x00, 0x00, 0x41, 0x22, 0x1c, 0x00 }, // )

{ 0x00, 0x14, 0x08, 0x3E, 0x08, 0x14 }, // *

{ 0x00, 0x08, 0x08, 0x3E, 0x08, 0x08 }, // +

{ 0x00, 0x00, 0x00, 0xA0, 0x60, 0x00 }, // ,

{ 0x00, 0x08, 0x08, 0x08, 0x08, 0x08 }, // -

{ 0x00, 0x00, 0x60, 0x60, 0x00, 0x00 }, // .

{ 0x00, 0x20, 0x10, 0x08, 0x04, 0x02 }, // /

{ 0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E }, // 0

{ 0x00, 0x00, 0x42, 0x7F, 0x40, 0x00 }, // 1

{ 0x00, 0x42, 0x61, 0x51, 0x49, 0x46 }, // 2

{ 0x00, 0x21, 0x41, 0x45, 0x4B, 0x31 }, // 3

{ 0x00, 0x18, 0x14, 0x12, 0x7F, 0x10 }, // 4

{ 0x00, 0x27, 0x45, 0x45, 0x45, 0x39 }, // 5

{ 0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30 }, // 6

{ 0x00, 0x01, 0x71, 0x09, 0x05, 0x03 }, // 7

{ 0x00, 0x36, 0x49, 0x49, 0x49, 0x36 }, // 8

{ 0x00, 0x06, 0x49, 0x49, 0x29, 0x1E }, // 9

{ 0x00, 0x00, 0x36, 0x36, 0x00, 0x00 }, // :

{ 0x00, 0x00, 0x56, 0x36, 0x00, 0x00 }, //

{ 0x00, 0x08, 0x14, 0x22, 0x41, 0x00 }, // <

{ 0x00, 0x14, 0x14, 0x14, 0x14, 0x14 }, // =

{ 0x00, 0x00, 0x41, 0x22, 0x14, 0x08 }, // >

{ 0x00, 0x02, 0x01, 0x51, 0x09, 0x06 }, // ?

{ 0x00, 0x32, 0x49, 0x59, 0x51, 0x3E }, // @

{ 0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C }, // A

{ 0x00, 0x7F, 0x49, 0x49, 0x49, 0x36 }, // B

{ 0x00, 0x3E, 0x41, 0x41, 0x41, 0x22 }, // C

{ 0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C }, // D

{ 0x00, 0x7F, 0x49, 0x49, 0x49, 0x41 }, // E

{ 0x00, 0x7F, 0x09, 0x09, 0x09, 0x01 }, // F

{ 0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A }, // G

{ 0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F }, // H

{ 0x00, 0x00, 0x41, 0x7F, 0x41, 0x00 }, // I

{ 0x00, 0x20, 0x40, 0x41, 0x3F, 0x01 }, // J

{ 0x00, 0x7F, 0x08, 0x14, 0x22, 0x41 }, // K

{ 0x00, 0x7F, 0x40, 0x40, 0x40, 0x40 }, // L

{ 0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F }, // M

{ 0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F }, // N

{ 0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E }, // O

{ 0x00, 0x7F, 0x09, 0x09, 0x09, 0x06 }, // P

{ 0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E }, // Q

{ 0x00, 0x7F, 0x09, 0x19, 0x29, 0x46 }, // R

{ 0x00, 0x46, 0x49, 0x49, 0x49, 0x31 }, // S

{ 0x00, 0x01, 0x01, 0x7F, 0x01, 0x01 }, // T

{ 0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F }, // U

{ 0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F }, // V

{ 0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F }, // W

{ 0x00, 0x63, 0x14, 0x08, 0x14, 0x63 }, // X

{ 0x00, 0x07, 0x08, 0x70, 0x08, 0x07 }, // Y

{ 0x00, 0x61, 0x51, 0x49, 0x45, 0x43 }, // Z

{ 0x00, 0x00, 0x7F, 0x41, 0x41, 0x00 }, // [

{ 0x00, 0x55, 0x2A, 0x55, 0x2A, 0x55 }, // 55

{ 0x00, 0x00, 0x41, 0x41, 0x7F, 0x00 }, // ]

{ 0x00, 0x04, 0x02, 0x01, 0x02, 0x04 }, // ^

{ 0x00, 0x40, 0x40, 0x40, 0x40, 0x40 }, // _

{ 0x00, 0x00, 0x01, 0x02, 0x04, 0x00 }, // '

{ 0x00, 0x20, 0x54, 0x54, 0x54, 0x78 }, // a

{ 0x00, 0x7F, 0x48, 0x44, 0x44, 0x38 }, // b

{ 0x00, 0x38, 0x44, 0x44, 0x44, 0x20 }, // c

{ 0x00, 0x38, 0x44, 0x44, 0x48, 0x7F }, // d

{ 0x00, 0x38, 0x54, 0x54, 0x54, 0x18 }, // e

{ 0x00, 0x08, 0x7E, 0x09, 0x01, 0x02 }, // f

{ 0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C }, // g

{ 0x00, 0x7F, 0x08, 0x04, 0x04, 0x78 }, // h

{ 0x00, 0x00, 0x44, 0x7D, 0x40, 0x00 }, // i

{ 0x00, 0x40, 0x80, 0x84, 0x7D, 0x00 }, // j

{ 0x00, 0x7F, 0x10, 0x28, 0x44, 0x00 }, // k

{ 0x00, 0x00, 0x41, 0x7F, 0x40, 0x00 }, // l

{ 0x00, 0x7C, 0x04, 0x18, 0x04, 0x78 }, // m

{ 0x00, 0x7C, 0x08, 0x04, 0x04, 0x78 }, // n

{ 0x00, 0x38, 0x44, 0x44, 0x44, 0x38 }, // o

{ 0x00, 0xFC, 0x24, 0x24, 0x24, 0x18 }, // p

{ 0x00, 0x18, 0x24, 0x24, 0x18, 0xFC }, // q

{ 0x00, 0x7C, 0x08, 0x04, 0x04, 0x08 }, // r

{ 0x00, 0x48, 0x54, 0x54, 0x54, 0x20 }, // s

{ 0x00, 0x04, 0x3F, 0x44, 0x40, 0x20 }, // t

{ 0x00, 0x3C, 0x40, 0x40, 0x20, 0x7C }, // u

{ 0x00, 0x1C, 0x20, 0x40, 0x20, 0x1C }, // v

{ 0x00, 0x3C, 0x40, 0x30, 0x40, 0x3C }, // w

{ 0x00, 0x44, 0x28, 0x10, 0x28, 0x44 }, // x

{ 0x00, 0x1C, 0xA0, 0xA0, 0xA0, 0x7C }, // y

{ 0x00, 0x44, 0x64, 0x54, 0x4C, 0x44 }, // z

{ 0x14, 0x14, 0x14, 0x14, 0x14, 0x14 }// horiz lines

}

/************************LCD初始化函数********************************/

void LCD_init(void)

{

//先设置为输出

pinMode(SCLK,OUTPUT)

pinMode(SDIN,OUTPUT)

pinMode(LCD_DC,OUTPUT)

pinMode(LCD_CE,OUTPUT)

pinMode(LCD_RST,OUTPUT)

// 产生一个让LCD复位的低电平脉冲

digitalWrite( LCD_RST, LOW)

delayMicroseconds(1)

digitalWrite( LCD_RST, HIGH)

// 关闭LCD

digitalWrite( LCD_CE, LOW)

delayMicroseconds(1)

// 使能LCD

digitalWrite( LCD_CE, HIGH)//LCD_CE = 1

delayMicroseconds(1)

LCD_write_byte(0x21, 0)// 使用扩展命令设置LCD模式

LCD_write_byte(0xc8, 0)// 设置偏置电压

LCD_write_byte(0x06, 0)// 温度校正

LCD_write_byte(0x13, 0)// 1:48

LCD_write_byte(0x20, 0)// 使用基本命令

LCD_clear()// 清屏

LCD_write_byte(0x0c, 0)// 设定显示模式，正常显示

// 关闭LCD

digitalWrite( LCD_CE, LOW) //LCD_CE = 0

}

/************************LCD清屏函数*******************************/

void LCD_clear(void)

{

unsigned int i

LCD_write_byte(0x0c, 0)

LCD_write_byte(0x80, 0)

for (i=0i<504i++)

{

LCD_write_byte(0, 1)

}

}

/*************************设置字符位置函数**************************/

void LCD_set_XY(unsigned char X, unsigned char Y)

{

LCD_write_byte(0x40 | Y, 0)// column

LCD_write_byte(0x80 | X, 0)// row

}

/*************************ASCII字符显示函数*************************/

void LCD_write_char(unsigned char c)

{

unsigned char line

c -= 32

for (line=0line<6line++)

{

LCD_write_byte(font6x8[c][line], 1)

}

}

/*******************************************************************/

/*-------------------------------------------------

LCD_write_english_String : 英文字符串显示函数

输入参数：*s ：英文字符串指针；

X、Y: 显示字符串的位置,x 0-83 ,y 0-5

--------------------------------------------------*/

void LCD_write_english_string(unsigned char X,unsigned char Y,char *s)

{

LCD_set_XY(X,Y)

while (*s)

{

LCD_write_char(*s)

s++

}

}

/******************************************************************/

/*---------------------------------------------

LCD_write_byte: 写数据到LCD

输入参数：data：写入的数据；

command ：写数据/命令选择；

---------------------------------------------*/

void LCD_write_byte(unsigned char dat, unsigned char command)

{

unsigned char i

digitalWrite( LCD_CE, LOW)// 使能LCD_CE = 0

if (command == 0)

{

digitalWrite( LCD_DC, LOW)// 传送命令 LCD_DC = 0

}

else

{

digitalWrite( LCD_DC, HIGH)// 传送数据LCD_DC = 1

}

for(i=0i<8i++)

{

if(dat&0x80)

{

digitalWrite( SDIN, HIGH)//SDIN = 1

}

else

{

digitalWrite( SDIN, LOW)//SDIN = 0

}

digitalWrite( SCLK, LOW)//SCLK = 0

dat = dat <<1

digitalWrite( SCLK, HIGH)//SCLK = 1

}

digitalWrite( LCD_CE, HIGH)//LCD_CE = 1

}

/*************************以下为主函数*****************************/

void loop()

{

LCD_init()//初始化液晶

LCD_clear()

LCD_write_english_string(0,0," --Arduino-- ")

LCD_write_english_string(0,2,"Renge:")

LCD_write_english_string(0,4,"DESIGN BY KENT")

LCD_write_english_string(0,5,"2010.6")

while(1)

{

digitalWrite(outputPin, LOW)// 使发出发出超声波信号接口低电平2μs

delayMicroseconds(2)

digitalWrite(outputPin, HIGH)// 使发出发出超声波信号接口高电平10μs，这里是至少10μs

delayMicroseconds(10)

digitalWrite(outputPin, LOW) // 保持发出超声波信号接口低电平

int distance = pulseIn(inputPin, HIGH) // 读出脉冲时间

distance= distance/58 // 将脉冲时间转化为距离（单位：厘米）

if(distance>120)

{

LCD_write_english_string(35,2,"???")

}

else

{

LCD_write_english_string(60,2,"cm")

LCD_set_XY(35, 2)

LCD_write_char( 0x30+distance%1000/100)//显示百位数

LCD_write_char( 0x30+distance%100/10) //显示十位数

LCD_write_char( 0x30+distance%10) //显示个位数

}

delay(10)

}

}

---