求助LCD12864(ST7920)液晶屏反白问题 -

#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
#include "4.h"
uchar code table[] =" 首页 ";
uchar code table1[]=" 第一页第一行 ";
uchar code table2[]=" 第一页第二行 ";
uchar code table3[]=" 第二页第一行 ";
uchar code table4[]=" 第二页第二行 ";
uchar code table5[]=" 第三页第三行 ";
uchar code table6[]=" 第三页第四行 ";
uchar fanye;
uchar i,l,m,n,r,s,u,v;
sbit LCD_SID=P0^6;
sbit LCD_SCLK=P0^5;
sbit key1=P1^1; //光标开关
sbit key2=P1^2; //按键减一页
sbit key3=P1^3; //按键加一页
void delay_ms(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void sendbyte(unsigned char bbyte) //发送一个字节
{
unsigned char i;
for(i=0;i<8;i++)
{
LCD_SID=bbyte&0x80; //取出最高位
LCD_SCLK=1;
LCD_SCLK=0;
bbyte<<=1; //左移
}
}
void write(bit start, unsigned char ddata) //写指令或数据
{
unsigned char start_data,Hdata,Ldata;
if(start==0)
start_data=0xf8; //写指令
else
start_data=0xfa; //写数据
Hdata=ddata&0xf0; //取高四位
Ldata=(ddata<<4)&0xf0; //取低四位
sendbyte(start_data); //发送起始信号
delay_ms(1); //延时
sendbyte(Hdata); //发送高四位
delay_ms(1);
sendbyte(Ldata); //发送低四位
delay_ms(1);
}
//***********一行显示8个汉字***********
//***************汉字显示***************
//***X为行Y为列,K为字的个数,*P为数组*
//*************************************
void chinese(uchar x,uchar y,uchar k,uchar *p)
{
uchar hang,out,i;
y=y-1;
switch(x)
{
case 1:hang=0x80;break;
case 2:hang=0x90;break;
case 3:hang=0x88;break;
case 4:hang=0x98;break;
}
out=hang+y;
write(0,out);
for(i=0;i<k*2;i++) {
write(1,*p);
p++;
}
//write(1,p);
}
//**********一行显示16个字母***********
//***********英文数字显示***************
//***X为行Y为列,K为字的个数,*P为数组*
//************************************
void english(uchar x,uchar y,uchar k,uchar *p)
{
uchar hang,out,i;
y=y-1;
switch(x)
{
case 1:hang=0x80;break;
case 2:hang=0x90;break;
case 3:hang=0x88;break;
case 4:hang=0x98;break;
}
out=hang+y;
write(0,out);
for(i=0;i<k;i++) {
write(1,*p);
p++;
}
}
void lcd_init()
{
write(0,0x30); //8位介面,基本指令集
write(0,0x0c); //显示打开,光标关,光标位置关
write(0,0x01); //清屏,将DDRAM地址计数器归零
delay_ms(10);
}
/*******************************反白1*************************
void fanbai(uchar data1,uchar data2,uchar x0,uchar y0,uchar x1,uchar y1)
{
uchar i,j;
for(j=0;j<y1;j++)
{
for(i=0;i<x1;i++)
{
write(0,0x34);
write(0,y0+j); //写y坐标
write(0,x0+i); //写x坐标
write(0,0x30);
write(1,data1);
write(1,data2);
}
}
write(0,0x36);
}
/*****************************反白2****************************/
void fanbai(uchar x)
{
uchar i,j;
if(x<2)
{
for(j=0;j<32;j++)
{
for(i=0;i<8;i++)
{
write(0,0x34);
write(0,0x80+j);
write(0,0x80+i);
write(0,0x30);
if(x<1)
{
if(j<16)
{
write(1,0xff);
write(1,0xff);
}
else
{
write(1,0x00);
write(1,0x00);
}
}
else
{
if(j<16)
{
write(1,0x00);
write(1,0x00);
}
else
{
write(1,0xff);
write(1,0xff);
}
}
}
}
for(j=32;j<64;j++)
{
for(i=0;i<8;i++)
{
write(0,0x34);
write(0,0x80+j-32);
write(0,0x88+i);
write(0,0x30);
write(1,0x00);
write(1,0x00);
}
}
}
else
{
for(j=0;j<32;j++)
{
for(i=0;i<8;i++)
{
write(0,0x34);
write(0,0x80+j);
write(0,0x80+i);
write(0,0x30);
write(1,0x00);
write(1,0x00);
}
}
for(j=32;j<64;j++)
{
for(i=0;i<8;i++)
{
write(0,0x34);
write(0,0x80+j-32);
write(0,0x88+i);
write(0,0x30);
if(x<3)
{
if(j<48)
{
write(1,0xff);
write(1,0xff);
}
else
{
write(1,0x00);
write(1,0x00);
}
}
else
{
if(j<48)
{
write(1,0x00);
write(1,0x00);
}
else
{
write(1,0xff);
write(1,0xff);
}
}
}
}
}
write(0,0x36);
}
/******************显示***********************************/
void display1()
{
write(0,0x01);
english(1,1,15,table1);
english(2,1,15,table2);
}
void display2()
{
write(0,0x01);
english(1,1,15,table3);
english(2,1,15,table4);
}
void display3()
{
write(0,0x01);
english(3,1,15,table5);
english(4,1,15,table6);
}
void main()
{
lcd_init();
write(0,0x01);
english(2,1,15,table);
while(1){
if(key1==0)
{
delay_ms(5);
if(key1==0){
//fanbai(0xff,0xff,0x88,2,0x90,2);
fanbai(3); // 范围0,1,2,3
write(0,0x30); //8位介面,基本指令集
while(!key1);
}
}
//*********************按键翻页*******************/
if(key3==0){
delay_ms(5);
if(key3==0){ //key3向右翻页
fanye++;
if(fanye>3){
fanye=3;
}
while(!key3);
}
if(fanye==1){display1();}
if(fanye==2){display2();}
if(fanye==3){display3();}
}
if(key2==0){
delay_ms(5);
if(key2==0){ //key2向左翻页
fanye--;
if(fanye<1){
fanye=1;
}
while(!key2);
}
if(fanye==3){display3();}
if(fanye==2){display2();}
if(fanye==1){display1();}
}
}
}

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