关于单片机液晶1602的程序片段问题

应该不是判断忙碌或者不只是判断忙碌，这个语句应该是送了一串命令进去

//HD44780 LCD DRIVER

#include <AT89X52H>

#include <ctypeh>

//LCD Commands

#define LCD_CLS 1 //Clears entire display and sets DDRAM address 0

#define LCD_HOME 2 //Sets DDRAM address 0 in address counter

#define LCD_SETMODE 4 //Sets cursor move direction and specifies display shift

#define LCD_SETVISIBLE 8 //Sets entire display (D) on/off,cursor on/off (C), and blinking of cursor position character (B)

#define LCD_SHIFT 16 //Moves cursor and shifts display without changing DDRAM contents

#define LCD_SETFUNCTION 32 //Sets interface data length (DL), number of display lines (N), and character font (F)

#define LCD_SETCGADDR 64 //Sets CGRAM addressCGRAM data is sent and received after this setting

#define LCD_SETDDADDR 128 //Sets DDRAM address DDRAM data is sent and received after this setting

#define TURE 1

#define FORSE 0

#define TMH 0xf8 //delay timeh 2ms

#define TML 0xCD //delay timel

//------------------------------------------

#define MAX_DISPLAY_CHAR 2

//-----------------------------------------

unsigned char code text[6]="hellow";

static unsigned char data counter,a;

void wcchar(unsigned char d); //write a command char

void wdchar(unsigned char i); //write a data char

char wtbusy(); //wait busy sign

void clrscr(void); //clear screen

void initime0(void); //initial time0

void delay(unsigned char i); //delay

//-------------------------------

unsigned char crc8(unsigned char pData,unsigned char count);

unsigned char pData[]={0x33,0x12,0x34,0x56,0x78,0x33,0x12,0x23,0x45,0x56};

unsigned char data crc;

static char outputbuffer[MAX_DISPLAY_CHAR];

char calc_decascii(char num);

//-------------------------------

void ISR_Timer0(void) interrupt 1

{

TL0=TML;

TH0=TMH;

counter--;

}

void ISR_Int0(void) interrupt 0

{

wdchar(text[a++]); //display "hellow"

if (a>=6)

{a=0;wdchar(' ');}

}

//main program display "hellow"

main(void)

{

unsigned char data k;

initime0();

wcchar(0x38); //initial lcd

wcchar(LCD_SETVISIBLE+6); //set lcd visible

clrscr(); //clear lcd

while(1)

{

crc8(&pData,10);

calc_decascii(crc);

wdchar (outputbuffer[1]);

wdchar (outputbuffer[2]);

wdchar (' ');

for(k=0;k<=6;k++)

{

// wdchar(text[k]); //display "hellow"

P1_2=0;

delay(55); //delay

P1_2=1;

delay(55); //delay

}

}

}

//sub function || display a char

void wdchar(unsigned char i) //write a char

{

unsigned char xdata j;

P1_0=1;

P1_1=0;

j=0x8000;

j=i;

while (wtbusy())

{}

}

void wcchar(unsigned char d) //write a command char

{

unsigned char xdata j;

P1_0=0;

P1_1=0;

j=0x8000;

j=d;

while (wtbusy())

{}

}

char wtbusy() //wait busy sign

{

unsigned char xdata j;

P1_0=0;

P1_1=1;

j=0x8000;

if(j&0x80)

{

return TURE;

}

else

{

return FORSE;

}

}

//clear screen

void clrscr()

{

wcchar(LCD_CLS);

}

//initial time0

void initime0()

{

TL0=TML;

TH0=TMH;

TR0=TURE;

IE=0x93; //Enable T0 and Serial Port

}

//sub function time delay

void delay(unsigned char i)

{

counter=i;

while (counter)

{}

}

unsigned char crc8(unsigned char pData,unsigned char count)

{

// unsigned char crc;

crc = 0;

while (count-- > 0)

{

crc ^= pData++;

}

return crc;

}

char calc_decascii(char num)

// A rather messy function to convert a floating

// point number into an ASCII string

{ long data temp = num;

char data arrayptr = &outputbuffer[MAX_DISPLAY_CHAR];

long data divisor = 10;

long data result;

char data remainder,asciival;

int data i;

// If the result of the calculation is zero

// insert a zero in the buffer and finish

if (!temp)

{ arrayptr = 48;

goto done;

}

// Handle Negative Numbers

if (temp < 0)

{ outputbuffer[0] = '-';

temp -= 2temp;

}

for (i=0 ; i < sizeof(outputbuffer) ; i++)

{ remainder = temp % divisor;

result = temp / divisor;

// If we run off the end of the number insert a space into

// the buffer

if ((!remainder) && (!result))

{ arrayptr = ' ';}

// We're in business - store the digit offsetting

// by 48 decimal to account for the ascii value

else

{ asciival = remainder + 48;

arrayptr = asciival;

}

temp /= 10;

// Save a place for a negative sign

if (arrayptr != &outputbuffer[1]) arrayptr--;

}

done: return outputbuffer;

}

程序肯定是有问题了,现让液晶显示出来内容,这样就说明1602的驱动是对的,

#include<stch>#define uchar unsigned char

#define uint unsigned int

uchar code table[]="SHUZILEIDA"; //让液晶显示这两行字

uchar code table1[]="IIS80COM!";

sbit lcdrs=P1^5; //数据/命令选择端sbit lcdrw=P1^6;

sbit lcden=P1^7; //液晶使能信号

sbit duan=P1^0; // 数码管段控制sbit wei=P1^1; // 数码管位控制

sbit rst=P3^4;//DS1302复位端，低电平关闭 uchar num;

void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

void write_com(uchar com) //命令{

lcdrs=0; //选择写命令

P0=com;

delay(5);

lcden=1; //使能信号

delay(5);

lcden=0; //关闭使能

}

void write_data(uchar date) //数据{

lcdrs=1; //选择写数据

P0=date;

delay(5);

lcden=1;

delay(5);

lcden=0;

}

void init(){

lcden=0;

write_com(0x38); //00111000 设置162显示，57点阵 8为数据接口

write_com(0x0c); //00001100 设置开显示，不显示光标

write_com(0x06); // 00000110 写一个字符后地址指针加 1

write_com(0x01); //00000001 显示清0，数据指针清零 / /

}

void main(){

P0=0XFF;

wei=0;

P0=0X00;

duan=0; //关闭数码管

lcdrw=0; //lcd写 *** 作

init();

write_com(0x80+0x10+0x03); // 数据行位置

for(num=0;num<10;num++) {

write_data(table[num]);

delay(20);

}

write_com(0x80+0x40);// 数据行位置 for(num=0;num<10;num++)

{

write_data(table1[num]);

delay(20);

}

/ for(num=0;num<16;num++) //屏幕左移

{

write_com(0x18);

delay(2000);

} /

while(1);

}

这是为你量身制作的，希望你能喜欢，光标根据按键在数字下面闪烁，一定符合你的要求，给你截了一张效果图

#include<reg52h>

#include<intrinsh>

#define uchar unsigned char

#define uint unsigned int

#define ulong unsigned long

uchar code table[]="1602";

sbit key1=P1^0;

sbit key2=P1^1;

sbit key3=P1^2;

sbit key4=P1^3;

sbit rs=P2^0;

sbit rw=P2^1;

sbit en=P2^2;

void delay(uint z)

{

uint x,y;

for(x=z;x>0;x--)

for(y=110;y>0;y--);

}

void write_com(uchar com)

{

rs=0;

rw=0;

en=0;

P0=com;

delay(5);

en=1;

delay(5);

en=0;

}

void write_dat(uchar dat)

{

rs=1;

rw=0;

en=0;

P0=dat;

delay(5);

en=1;

delay(5);

en=0;

}

void init()

{

uchar i;

write_com(0x38);

write_com(0x0c);

write_com(0x06);

write_com(0x01);

write_com(0x86);

for(i=0;i<4;i++)

{

write_dat(table[i]);

delay(5);

}

}

void main()

{

init();

while(1)

{

if(key1==0)

{

delay(10);

if(key1==0)

{

while(key1==0);

write_com(0x86);

write_com(0x0f);

}

}

if(key2==0)

{

delay(10);

if(key2==0)

{

while(key2==0);

write_com(0x87);

write_com(0x0f);

}

}

if(key3==0)

{

delay(10);

if(key3==0)

{

while(key3==0);

write_com(0x88);

write_com(0x0f);

}

}

if(key4==0)

{

delay(10);

if(key4==0)

{

while(key4==0);

write_com(0x89);

write_com(0x0f);

}

}

}

}

1、首先我们打开KeilμVision编译器，新建一个工程，然后保存在硬盘上的位置。

2、其次导入51单片机的头文件以及LCD1602的头文件。创建一个延时函数，可以传入想要具体延时的时长，其内部实现是由一个二重循环，两个循环的次数相乘积。

3、最后最后在主函数中首先执行LCD1602的初始化函数，首先创建一个无限循环，然后添加两个字符串，这里以两行显示百度经验的网址为例，再进行延时以及使用清屏函数进行刷新。

#include "reg52h"

sbit LED=P1^0;//LED锁存器

sbit SEG=P1^1;//数码管段选锁存器

sbit DIG=P1^2;//数码管位选锁存器

unsigned char t;

sbit LCDRS=P2^7;//数据指令控制

sbit LCDRW=P2^6;//读写控制

sbit LCDEN=P2^5;//液晶屏使能控制

//延时函数，延时n1ms

void delay(unsigned char n)

{

int i,j;

for (i=0; i<n; i++)

for (j=0; j<100; j++)

;

}

//写命令

void Write_Cmd(unsigned char C)

{

LCDEN=1;//使能端，由高电平跳变成低电平时，液晶屏模块执行命令

LCDRS=0;//指令寄存器选择

P0=C;

delay(5);

LCDEN=0;

}

//写数据

void Write_Data(unsigned char D)

{

LCDEN=1;//使能端，由高电平跳变成低电平时，液晶屏模块执行命令

LCDRS=1;//选择数据寄存器

P0=D;

delay(5);

LCDEN=0;

}

//LCD初始化

void LCD_Init()

{

LCDRS=0;//指令寄存器选择

Write_Cmd(0x01);//清屏

Write_Cmd(0x38);//功能设置8位双行显示57点阵

Write_Cmd(0x0F);//开关显示设置

Write_Cmd(0x06);//输入方式设置，光标从左向右移动，内容不移动

}

void main()

{

unsigned char Code1[]="I LOVE MCU!";

unsigned char m;

//LED，数码管锁存器片选设置

LED=0;

DUAN=0;

WEI=0;

LCDRW=0;//写选择

LCD_Init();

Write_Cmd(0x80+0x01);//写入显示缓冲区起始地址为1行2列

for(m=0;m<11;m++)

{

Write_Data(Code1[m]);

delay(3);

}

while (1)

;

}//end of main

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