超声波测距1602显示程序

1、#include <AT89x51.H>/器件配置文件#include <intrins.h>#define RX P2_7#define TX P2_6#define LCM_RW P3_4 /定义LCD引脚#define LCM_RS P3_3#define LCM_E P3_5#define LCM_Data P1#define Key_Data P2_0 /定义Keyboard引脚#define Key_CLK P3_2#define Busy 0x80 /用于检测LCM状态字中的Busy标识void LCMInit(void);void DisplayOneC

2、har(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);void Decode(unsigned char ScanCode);void WriteDataLCM(unsigned char WDLCM);void WriteCommandLCM(unsigned char WCLCM,B

3、uysC);unsigned char ReadDataLCM(void);unsigned 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'

4、,'5','6','7','8','9','.','-','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 = WD

5、LCM;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

6、_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 = 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Delay5M

7、s(); 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(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,

8、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, 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 ListLe

9、ngth; ListLength = 0;Y &= 0x1;X &= 0xF; /限制X不能大于15，Y不能大于1while (DDataListLength>0x19) /若到达字串尾则退出if (X <= 0xF) /X坐标应小于0xFDisplayOneChar(X, Y, DDataListLength); /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)unsigne

10、d char TempCycA = 5;unsigned int TempCycB;while(TempCycA-)TempCycB=7269;while(TempCycB-);/*/ void Conut(void) time=TH0*256+TL0; TH0=0; TL0=0; S=(time*1.7)/100; /算出来是CM if(S>=700)|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, AS

11、CII11); DisplayOneChar(3, 1, ASCII11); DisplayOneChar(4, 1, ASCII12);/显示M else disbuff0=S%1000/100; disbuff1=S%1000%100/10; disbuff2=S%1000%10 %10; DisplayOneChar(0, 1, ASCIIdisbuff0); DisplayOneChar(1, 1, ASCII10);/显示点 DisplayOneChar(2, 1, ASCIIdisbuff1); DisplayOneChar(3, 1, ASCIIdisbuff2); Displa

12、yOneChar(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_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _no

13、p_(); _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; TempCyc<10; TempCyc+)Delay400Ms(); /延时DisplayListChar(0, 1, Cls);while(1) TMOD=0x01;