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#include <AT89x51.H> //器件配置文件#include <intrins.h>#define RX P3_6#define TX P3_7#define LCM_RW P2_3 //定義LCD引腳#define LCM_RS P2_4#define LCM_E P2_2#define LCM_Data P1#define Key_Data P3_3 //定義Keyboard引腳#define Key_CLK P3_2#define Busy 0x80 //用于檢測LCM狀態字中的Busy標識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);void Decode(unsigned char ScanCode);void WriteDataLCM(unsigned char WDLCM);void WriteCommandLCM(unsigned char WCLCM,BuysC);unsigned char ReadDataLCM(void);unsigned char ReadStatusLCM(void);unsigned char code mcustudio[] ={"==Range Finder=="};unsigned char code email[] = {"xxxxxx "};unsigned char code Cls[] = {" "};unsigned char code ASCII[15] = {'0','1','2','3','4','5','6','7','8','9','.','-','M'};static unsigned char DisNum = 0; //顯示用指針 unsigned int time=0; unsigned long S=0; bit flag =0; unsigned char disbuff[4] ={ 0,0,0,0,};//寫數據void WriteDataLCM(unsigned char WDLCM) { ReadStatusLCM(); //檢測忙 LCM_Data = WDLCM; LCM_RS = 1; LCM_RW = 0; LCM_E = 0; //若晶振速度太高可以在這后加小的延時 LCM_E = 0; //延時 LCM_E = 1;}//寫指令void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC為0時忽略忙檢測{ if (BuysC) ReadStatusLCM(); //根據需要檢測忙 LCM_Data = WCLCM; LCM_RS = 0; LCM_RW = 0; LCM_E = 0; LCM_E = 0; LCM_E = 1; }//讀數據unsigned char ReadDataLCM(void){ LCM_RS = 1; LCM_RW = 1; LCM_E = 0; LCM_E = 0; LCM_E = 1; return(LCM_Data);}//讀狀態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); //檢測忙信號 return(LCM_Data);}void LCMInit(void) //LCM初始化{ LCM_Data = 0; WriteCommandLCM(0x38,0); //三次顯示模式設置，不檢測忙信號 Delay5Ms(); WriteCommandLCM(0x38,0); Delay5Ms(); WriteCommandLCM(0x38,0); Delay5Ms(); WriteCommandLCM(0x38,1); //顯示模式設置,開始要求每次檢測忙信號 WriteCommandLCM(0x08,1); //關閉顯示 WriteCommandLCM(0x01,1); //顯示清屏 WriteCommandLCM(0x06,1); // 顯示光標移動設置 WriteCommandLCM(0x0F,1); // 顯示開及光標設置}//按指定位置顯示一個字符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1 if (Y) X |= 0x40; //當要顯示第二行時地址碼+0x40; X |= 0x80; //算出指令碼 WriteCommandLCM(X, 1); //發命令字 WriteDataLCM(DData); //發數據}//按指定位置顯示一串字符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1 while (DData[ListLength]>0x19) //若到達字串尾則退出 { if (X <= 0xF) //X坐標應小于0xF { DisplayOneChar(X, Y, DData[ListLength]); //顯示單個字符 ListLength++; X++; } }}//5ms延時void Delay5Ms(void){ unsigned int TempCyc = 5552; while(TempCyc--);}//400ms延時void Delay400Ms(void){ unsigned 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*1.8)/10; //算出來是MM if((S>=7000)||flag==1) //超出測量范圍顯示“-” { flag=0; DisplayOneChar(0, 1, ASCII[11]); DisplayOneChar(1, 1, ASCII[10]); //顯示點 DisplayOneChar(2, 1, ASCII[11]); DisplayOneChar(3, 1, ASCII[11]); DisplayOneChar(4, 1, ASCII[11]); DisplayOneChar(5, 1, ASCII[12]); //顯示M } else { disbuff[0]=S/1000; disbuff[1]=S/100%10; disbuff[2]=S/10%10; disbuff[3]=S%10; DisplayOneChar(0, 1, ASCII[disbuff[0]]); DisplayOneChar(1, 1, ASCII[10]); //顯示點 DisplayOneChar(2, 1, ASCII[disbuff[1]]); DisplayOneChar(3, 1, ASCII[disbuff[2]]); DisplayOneChar(4, 1, ASCII[disbuff[3]]); DisplayOneChar(5, 1, ASCII[12]); //顯示M } }/********************************************************/ void zd0() interrupt 1 //T0中斷用來計數器溢出,超過測距范圍 { flag=1; //中斷溢出標志 RX=0; }/********************************************************/ void StartModule() //啟動模塊 { TX=1; //啟動一次模塊 _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); TX=0; }void Timer_Count(void){ TR0=1; //開啟計數 while(RX); //當RX為1計數并等待 TR0=0; //關閉計數 Conut(); //計算}/********************************************************/ void delayms(unsigned int ms){ unsigned char i=100,j; for(;ms;ms--) { while(--i) { j=10; while(--j); } }}/*********************************************************/void main(void){ unsigned int valA; unsigned char TempCyc; Delay400Ms(); //啟動等待，等LCM講入工作狀態 LCMInit(); //LCM初始化 Delay5Ms(); //延時片刻(可不要) DisplayListChar(0, 0, mcustudio); DisplayListChar(0, 1, email); ReadDataLCM();//測試用句無意義 for (TempCyc=0; TempCyc<10; TempCyc++) Delay400Ms(); //延時 DisplayListChar(0, 1, Cls); TMOD=0x01; //設T0為方式1，GATE=1； TH0=0; TL0=0; ET0=1; //允許T0中斷 EA=1; //開啟總中斷 while(1) { delayms(60); RX=1; StartModule(); for(valA=7510;valA>0;valA--) { if(RX==1) { Timer_Count(); } } }} |
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