基于 AT89C51 单片机电子密码锁#include"main.h" /******************** LCD PART START *******************************/ //5ms 延时void Delay5Ms(void){unsigned int TempCyc = 5552;while(TempCyc--);}//读状态unsigned char ReadStatusLCM(void){LCM_Data = 0xFF; LCM_RS = 0;LCM_RW = 1;LCM_E = 0;LCM_E = 0;LCM_E = 1;Delay5Ms();while (LCM_Data & Busy); //检测忙信号return(LCM_Data);}//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);} void LCMInit(void) //LCM 初始化{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(0x38,1); //显示模式设置,开始要求每次检测忙信号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}//按指定位置显示一个字符,x 表示列，Y 表示行void LCD_write_char(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 1if (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);}//按指定位置显示一串字符void LCD_write_string(unsigned char X,unsigned char Y, unsigned char code *DData){unsigned char ListLength;ListLength = 0;Y &= 0x1;X &= 0xF; //限制 X 不能大于 15，Y 不能大于 1while (*DData) //若到达字串尾则退出'\0'就是 0{if...
