小弟刚学到1602,刚开始的时候卡死在初始化上了,一见Delay就头大,索性咱不要Delay了.
把测试程序贴上来,求大家看看代码有什么毛病,和隐患。
这是main()
#include <reg52.h>
//#include <STC90.H> //STC单片机用的,可代替reg52.h
#include "LCD1602.h"
#include "MacroAndConst.h"
#include "Time.h"
xdata unsigned char str[] ="LCD1602 Init OK!";
xdata unsigned char str2[]="BUSY Count=";
void main(void)
{
unsigned j,i,k,g,s,b,q;
Timer0Init();
EA=1;
LCD1602_Init();
while(1)
{
while(!LCD1602_Write(0x80,1))k++;
for(i=0;i<=16;i++)
{
while(!LCD1602_Write(str,0))k++;
}
while(!LCD1602_Write(0xC0,1))k++;
for(i=0;i<12;i++)
{
while(!LCD1602_Write(str2,0))k++;
}
g=k%10+0x30;
s=k/10%10+0x30;
b=k/100%10+0x30;
q=k/1000%10+0x30;
while(!LCD1602_Write(q,0))k++;
while(!LCD1602_Write(b,0))k++;
while(!LCD1602_Write(s,0))k++;
while(!LCD1602_Write(g,0))k++;
j=0;
while(j<=500)
{
if(SysTime1Ms)
{
j++;
SysTime1Ms=0;
}
}
k=0;
while(!LCD1602_Write(0x01,1))k++; //清屏
}
}
这是1602.c
- //#include <STC90.H>
- #include <reg52.h>
- #include <intrins.h>
- #include "MacroAndConst.h"
- #include "Time.h"
- /* 晶振=12M */
- //////LCD1602端口定义//////
- sbit LCD1602_RS=P2^6; //0=读写状态or命令 ,1=读写数据
- sbit LCD1602_RW=P2^5; //0=写,1=读
- sbit LCD1602_EN=P2^7; //1=读,高脉冲=写
- sbit LCD1602BUSY=P0^7; //1=液晶忙,0=空闲
- #define LCD1602_DAT P0
- //////LCD1602忙判断///////////////////////
- bit LCD1602_Busy(void)
- {
- LCD1602BUSY=1;
- LCD1602_EN=0;
- LCD1602_RS=0;
- LCD1602_RW=1;
- LCD1602_EN=1;
- while(LCD1602BUSY)return 0; //空闲标志=1
- LCD1602_EN=0;
- return 1;
-
- }
- //////LCD1602写命令或数据函数//////
- bit LCD1602_Write(uchar LCD_DAT,bit ComOrDat)
- {
- //while(!SysTime1Ms);SysTime1Ms=0; //写命令内的延时,死循环
- if((!ComOrDat)&&LCD1602_Busy()) //ComOrDat=0,写数据
- {
- LCD1602_RS=1;
- LCD1602_RW=0;
- LCD1602_DAT=LCD_DAT;
- LCD1602_EN=1;
- LCD1602_EN=0;
- return 1;
- }
- if((ComOrDat)&&LCD1602_Busy()) //ComOrDat=1,写命令
- {
- LCD1602_EN=0;
- LCD1602_RS=0;
- LCD1602_RW=0;
- LCD1602_DAT=LCD_DAT;
- LCD1602_EN=1;
- LCD1602_EN=0;
- return 1;
- }
- return 0;
- }
- ////////初始化最关键,注意调节延时。仿真失败不代表真机不行。//////
- void LCD1602_Init(void)
- {
- //仿真用延时
- while(!LCD1602_Write(0x38,1));
- while(!LCD1602_Write(0x08,1)); //关显,无光标
- while(!LCD1602_Write(0x01,1)); //清屏
- while(!LCD1602_Write(0x0c,1)); //开显,无光标
- //while(!LCD1602_Write(0x06,1));
-
- }
复制代码这是time.c
- #include "MacroAndConst.h"
- #include <reg52.h>
- bit SysTime1Ms;
- bit SysTime2Ms;
- void Delay1Ms(unsigned long j) //初始化不必忌讳用Delay
- {
- //if(j=0)return;
- while(j--)
- {
- while(!SysTime1Ms);
- SysTime1Ms=0;
- }
- }
- void Timer0Init(void)
- {
- TMOD &= 0xf0 ;
- TMOD |= 0x01 ; //定时器0工作方式1
- TH0 = 0xfc ; //定时器初始值
- TL0 = 0x17;
- TR0 = 1 ;
- ET0 = 1 ;
- }
- void SysTimeIst() interrupt 1
- {
- // static unsigned int c;
- TH0 = 0xfC ; //定时器初始值
- TL0 = 0x1f;
- SysTime1Ms=1;
- // if(++c>=1){SysTime2Ms=1;c=0;}
- }
复制代码头文件1602.h
- #ifndef _LCD1602_H_
- #define _LCD1602_H_
- extern bit LCD1602_Write(unsigned char,bit);
- extern void LCD1602_Init(void);
- #endif
复制代码time.h
- #ifndef _Time_H_
- #define _Time_H_
- extern void Timer0Init(void);
- extern void Delay1Ms(unsigned long);
- extern bit SysTime1Ms;
- extern bit SysTime2Ms;
- #endif
复制代码
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