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- /*=============================================================
- 安裝HC SR04請參照該文件夾下的圖片01
- =============================================================*/
- #include <AT89x51.H> //器件配置文件
- #include <intrins.h>
- #define RX P1_6
- #define TX P1_7
- #define LCM_RW P3_6 //定義LCD引腳
- #define LCM_RS P3_5
- #define LCM_E P3_4
- #define LCM_Data P0
- #define Key_Data P3_0 //定義Keyboard引腳
- #define Key_CLK P3_2
- #define Busy 0x80 //用于檢測LCM狀態(tài)字中的Busy標(biāo)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[] ={"qx-muc.taobao.co"};
- unsigned char code email[] = {"fhwxaoo@163.com "};
- 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(shù)據(jù)
- 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(jù)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(shù)據(jù)
- 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(tài)
- 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(shè)置,不檢測忙信號
- Delay5Ms();
- WriteCommandLCM(0x38,0);
- Delay5Ms();
- WriteCommandLCM(0x38,0);
- Delay5Ms();
- WriteCommandLCM(0x38,1); //顯示模式設(shè)置,開始要求每次檢測忙信號
- WriteCommandLCM(0x08,1); //關(guān)閉顯示
- WriteCommandLCM(0x01,1); //顯示清屏
- WriteCommandLCM(0x06,1); // 顯示光標(biāo)移動設(shè)置
- WriteCommandLCM(0x0F,1); // 顯示開及光標(biāo)設(shè)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(dāng)要顯示第二行時地址碼+0x40;
- X |= 0x80; //算出指令碼
- WriteCommandLCM(X, 1); //發(fā)命令字
- WriteDataLCM(DData); //發(fā)數(shù)據(jù)
- }
- //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(dá)字串尾則退出
- {
- if (X <= 0xF) //X坐標(biāo)應(yīng)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*1.7)/100; //算出來是CM
- if((S>=700)||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[12]); //顯示M
- }
- else
- {
- disbuff[0]=S%1000/100;
- disbuff[1]=S%1000%100/10;
- disbuff[2]=S%1000%10 %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[12]); //顯示M
- }
- }
- /********************************************************/
- void zd0() interrupt 1 //T0中斷用來計數(shù)器溢出,超過測距范圍
- {
- flag=1; //中斷溢出標(biāo)志
- }
- /********************************************************/
- 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 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(); //啟動等待,等LCM講入工作狀態(tài)
- 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);
- while(1)
- {
- TMOD=0x01; //設(shè)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)
- {
- StartModule();
- // DisplayOneChar(0, 1, ASCII[0]);
- while(!RX); //當(dāng)RX為零時等待
- TR0=1; //開啟計數(shù)
- while(RX); //當(dāng)RX為1計數(shù)并等待
- TR0=0; //關(guān)閉計數(shù)
- Conut(); //計算
- delayms(80); //80MS
-
- }
- }
- }
復(fù)制代碼
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