C8051f020液晶问题,真的救救我,没时间了
请帮我,我用的是C8051F020的单片机 想驱动1602的液晶屏显示时钟。连接通电之后液晶屏就只有背光其他的什么都没有,请帮我看看程序哪有问题,F020初始化真麻烦,帮我看看是不是哪漏了。谢谢大家#include<C8051f020.h>
#define uchar unsigned char
#define uint unsigned int
sbit rs=P2^5;
sbit lcden=P2^3;
sbit rd=P2^7;
uchar count;
char miao,shi,fen;
uchar code table[]="2009-9-30 Wed";
uchar code table1[]=" 00:00:00";
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void write_com(uchar com)
{
rd=0;
rs=0;
lcden=0;
P1=com;
delay(12);
lcden=1;
delay(12);
lcden=0;
}
void write_date(uchar date)
{
rd=0;
rs=1;
lcden=0;
P1=date;
delay(12);
lcden=1;
delay(12);
lcden=0;
}
void init()
{
uchar num;
WDTCN=0xDE;
WDTCN=0xAD;
XBR2=0x40;
P1MDIN=0xFF;
P1MDOUT=0xFF;
rd=0;
lcden=0;
// fen=59;
// miao=53;
// shi=23;
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80);
for(num=0;num<15;num++)
{
write_date(table);
delay(12);
}
write_com(0x80+0x40);
for(num=0;num<12;num++)
{
write_date(table1);
delay(12);
}
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void write_sfm(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+0x40+add);
write_date(0x30+shi);
write_date(0x30+ge);
}
void main()
{
init();
}
void timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
count++;
if(count==41)
{
count=0;
miao++;
if(miao==60)
{
miao=0;
fen++;
if(fen==60)
{
fen=0;
shi++;
if(shi==24)
{
shi=0;
}
write_sfm(4,shi);
}
write_sfm(7,fen);
}
write_sfm(10,miao);
}
} 先检查接线,有没有对比度调节电位器?最好把你的接线图发上来 连线没问题,对比度的可变电阻接了,我觉得初始化少东西了,但不知道 rw位好像要用到吧 可以参考一下我以前写的初始化部分
void LCD_1602_initial()
{
unsigned int i;
write_command(0x38);
delay();
write_command(0x38);
delay();
write_command(0x38);
delay();
write_command(0x06);
write_command(0x0c);
for(i=0;i<84;i++)
{
write_command(0x80+i);
write_data(0x41);
}
} 把你的init_device发上来 看配置对不对这个只是程序 看不出错 我之前也遇到过这样的问题,
#include <c8051f020.h>
#include <intrins.h>
#include <absacc.h>
#include <stdlib.h> //标准函数
#include <stdio.h> //I/O口函数
#define _Nop() _nop_()
#define uchar unsigned char
#define uint unsigned int
//--------------------------------------------------------------------
//全局变量
//--------------------------------------------------------------------
//--------------------------------------------------------------------
//函数声明
//--------------------------------------------------------------------
void SYSCLK_Init (void);
void PORT_Init(void);
void Delay( uint ); //延时子程序
//--------------------------------------------------------------------
// 主函数
//--------------------------------------------------------------------
void main (void)
{
WDTCN = 0xde;
WDTCN = 0xad; //关闭WDT
SYSCLK_Init ();
PORT_Init();
}
//-----------------------------------------------------------------------------
// 系统时钟配置
//-----------------------------------------------------------------------------
void SYSCLK_Init (void)
{
// OSCICN =0x87; //使用内部时钟16M
// while((OSCICN & 0x10)==0);//内部时钟按设定频率运行
int i; // delay counter
OSCXCN = 0x67; // start external oscillator with
// 22.1184MHz crystal
for (i=0; i < 256; i++) ; // Wait for osc. to start up
while (!(OSCXCN & 0x80)) ; // Wait for crystal osc. to settle
OSCICN = 0x88; // select external oscillator as SYSCLK
// source and enable missing clock
// detector
}
//-----------------------------------------------------------------------------
// I/O配置
//-----------------------------------------------------------------------------
void PORT_Init()
{
XBR2 = 0x40; // 交叉开关使能
//P74OUT= 0x3f; //P7open drain,P6、5、P4的高4位为推挽输出
P74OUT= 0xff; //推挽输出
}
/*******************************************************************************
延时子程序
********************************************************************************/
void Delay( uint tt )
{
while( tt-- );
}
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