1602A(16*2)模拟口线接线方式图:
|LCM-----51 | LCM-----51 | LCM------51 |||0-----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 | V接1K到GND|
[注:AT89S51使用12M晶振]
#define LCM_RW P2_0 //定义引脚#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
#include <at89x51.h>
void WritEDAtaLCM(unsigned char WDLCM);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 cdle_net[] = {"www.cdle.net"};unsigned char code email[] = {"pnzwzw@cdle.net"};
void main(void){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, 0, cdle_net);DisplayListChar(0, 1, email);ReadDataLCM();//测试用句无意义while(1);}
//写数据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;}
//写指令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; }
//读数据unsigned char ReadDataLCM(void){LCM_RS = 1; LCM_RW = 1;LCM_E = 0;LCM_E = 0;LCM_E = 1;return(LCM_Data);}
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