使用1602液晶显示的实验例子
扫描二维码
随时随地手机看文章
使用1602液晶显示的实验例子
SMC1602A(16*2)模拟口线接线方式
连接线图:
|LCM-----51 | LCM-----51 | LCM------51 | [注:AT89S51使用12M晶振] #define LCM_RW P2_0 //定义引脚 #include <at89x51.h> void WriteDataLCM(unsigned char WDLCM); unsigned char code cdle_net[] = {"www.cdle.net"}; void main(void) DisplayListChar(0, 0, cdle_net); //写数据 //写指令 //读数据 //读状态 void LCMInit(void) //LCM初始化 WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号 //按指定位置显示一个字符 //按指定位置显示一串字符 ListLength = 0; //5ms延时 //400ms延时
|
|DB0-----P1.0 | DB4-----P1.4 | RW-------P2.0 |
|DB1-----P1.1 | DB5-----P1.5 | RS-------P2.1 |
|DB2-----P1.2 | DB6-----P1.6 | E--------P2.2 |
|DB3-----P1.3 | DB7-----P1.7 | VLCD接1K电阻到GND|
#define LCM_RS P2_1
#define LCM_E P2_2
#define LCM_Data P1
#define Busy 0x80 //用于检测LCM状态字中的Busy标识
void WriteCommandLCM(unsigned char WCLCM,BuysC);
unsigned char ReadDataLCM(void);
unsigned char ReadStatusLCM(void);
void LCMInit(void);
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
void Delay5Ms(void);
void Delay400Ms(void);
unsigned char code email[] = {"pnzwzw@cdle.net"};
{
Delay400Ms(); //启动等待,等LCM讲入工作状态
LCMInit(); //LCM初始化
Delay5Ms(); //延时片刻(可不要)
DisplayListChar(0, 1, email);
ReadDataLCM();//测试用句无意义
while(1);
}
void WriteDataLCM(unsigned char WDLCM)
{
ReadStatusLCM(); //检测忙
LCM_Data = WDLCM;
LCM_RS = 1;
LCM_RW = 0;
LCM_E = 0; //若晶振速度太高可以在这后加小的延时
LCM_E = 0; //延时
LCM_E = 1;
}
void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测
{
if (BuysC) ReadStatusLCM(); //根据需要检测忙
LCM_Data = WCLCM;
LCM_RS = 0;
LCM_RW = 0;
LCM_E = 0;
LCM_E = 0;
LCM_E = 1;
}
unsigned char ReadDataLCM(void)
{
LCM_RS = 1;
LCM_RW = 1;
LCM_E = 0;
LCM_E = 0;
LCM_E = 1;
return(LCM_Data);
}
unsigned char ReadStatusLCM(void)
{
LCM_Data = 0xFF;
LCM_RS = 0;
LCM_RW = 1;
LCM_E = 0;
LCM_E = 0;
LCM_E = 1;
while (LCM_Data & Busy); //检测忙信号
return(LCM_Data);
}
{
LCM_Data = 0;
WriteCommandLCM(0x38,0); //三次显示模式设置,不检测忙信号
Delay5Ms();
WriteCommandLCM(0x38,0);
Delay5Ms();
WriteCommandLCM(0x38,0);
Delay5Ms();
WriteCommandLCM(0x08,1); //关闭显示
WriteCommandLCM(0x01,1); //显示清屏
WriteCommandLCM(0x06,1); // 显示光标移动设置
WriteCommandLCM(0x0C,1); // 显示开及光标设置
}
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
Y &= 0x1;
X &= 0xF; //限制X不能大于15,Y不能大于1
if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
X |= 0x80; //算出指令码
WriteCommandLCM(X, 0); //这里不检测忙信号,发送地址码
WriteDataLCM(DData);
}
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
{
unsigned char ListLength;
Y &= 0x1;
X &= 0xF; //限制X不能大于15,Y不能大于1
while (DData[ListLength]>0x20) //若到达字串尾则退出
{
if (X <= 0xF) //X坐标应小于0xF
{
DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
ListLength++;
X++;
}
}
}
void Delay5Ms(void)
{
unsigned int TempCyc = 5552;
while(TempCyc--);
}
void Delay400Ms(void)
{
unsigned char TempCycA = 5;
unsigned int TempCycB;
while(TempCycA--)
{
TempCycB=7269;
while(TempCycB--);
};
}