超声波测距程序1602显示 已修改

1、#include AT89x51.H器件配置文件#define RX P1_3#define TX P1_4#define LCM_RW P1_1定义LCD引脚#define LCM_RS P1_2#define LCM_E P1_0#define LCM_Data P2#define Key_Data P1_5 定义Keyboard引脚#define Key_CLK P1_6#define Busy 0x80 用于检测LCM状态字中的Busy标识void LCMInit(void);void DisplayOneChar(unsigned char X, unsigned char Y, u

2、nsigned char DData);void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code DData);void Delay5Ms(void);void Delay400Ms(void);void Decode(unsigned char ScanCode); void WriteDataLCM(unsigned char WDLCM);void WriteCommandLCM(unsigned char WCLCM,BuysC);unsigned char ReadDataLCM(void);u

3、nsigned char ReadStatusLCM(void);unsigned char code mcustudio =mcustudio ;unsigned char code email = fhwxaoo163 ;unsigned char code Cls = ;unsigned char code ASCII15 = '0','1','2','3','4','5','6','7','8','9','.',

4、'-','M'static unsigned char DisNum = 0; 显示用指针 unsigned int time=0; unsigned long S=0; bit flag =0; unsigned char disbuff4 = 0,0,0,0,;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 Wri

5、teCommandLCM(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);读状态unsigned char ReadStatusLCM(void)LCM_Data = 0xFF; LCM_RS

6、=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);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WriteComma

7、ndLCM(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(0x0F,1); 显示开及光标设置按指定位置显示一个字符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

8、, 1); 发命令字WriteDataLCM(DData); 发数据按指定位置显示一串字符void DisplayListChar(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 (DDataListLength0x19) 若到达字串尾则退出if (X = 0xF) X坐标应小于0xFDisplayOneChar(X, Y, DDataListLe

9、ngth); 显示单个字符ListLength+;X+;5ms延时void Delay5Ms(void)unsigned int TempCyc = 5552;while(TempCyc-);400ms延时void Delay400Ms(void)unsigned char TempCycA = 5;unsigned int TempCycB;while(TempCycA-)TempCycB=7269;while(TempCycB-); void Conut(void) time=TH0256+TL0; TH0=0; TL0=0; S=(time1.72)100; 算出来是CM if(S=70

10、0)flag=1) 超出测量范围显示“-” flag=0; DisplayOneChar(0, 1, ASCII11); DisplayOneChar(1, 1, ASCII10);显示点 DisplayOneChar(2, 1, ASCII11); DisplayOneChar(3, 1, ASCII11); DisplayOneChar(4, 1, ASCII12);显示M else disbuff0=S%1000100; disbuff1=S%1000%10010; disbuff2=S%1000%10 %10; DisplayOneChar(0, 1, ASCIIdisbuff0);

11、DisplayOneChar(1, 1, ASCII10);显示点 DisplayOneChar(2, 1, ASCIIdisbuff1); DisplayOneChar(3, 1, ASCIIdisbuff2); DisplayOneChar(4, 1, ASCII12);显示M void zd0() interrupt 1 T0中断用来计数器溢出,超过测距范围 flag=1; 中断溢出标志 void StartModule() 启动模块 TX=1; 启动一次模块 _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _

12、nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); TX=0; void delayms(unsigned int ms)unsigned char i=100,j;for(;ms;ms-)while(-i)j=10;while(-j);void main(void)unsigned char TempCyc;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, mcustudio);DisplayListChar(0, 1, email);ReadDataLCM();测试用句无意义for (TempCyc=0; TempCyc10; TempCyc+)Delay400Ms(); 延时DisplayListChar(0, 1, Cls);while(1) TMOD=0x01; 设