利用红外对管测数,之后把数据通过lcd1602显示出来
单片机源程序如下:
- /*============================================================
- /
- ==============================================================
- SMC1602A(16*2)模拟口线接线方式
- 连接线图:
- ---------------------------------------------------
- |LCM-----51 | LCM-----51 | LCM------51 |
- --------------------------------------------------|
- |DB0-----P1.0 | DB4-----P1.4 | RW-------P3.4 |
- |DB1-----P1.1 | DB5-----P1.5 | RS-------P3.3 |
- |DB2-----P1.2 | DB6-----P1.6 | E--------P3.5 |
- |DB3-----P1.3 | DB7-----P1.7 | VLCD接1K电阻到GND|
- ---------------------------------------------------
- 接线:模块TRIG接 P2.6 ECH0 接P2.7
- =============================================================*/
- #include <AT89x51.H> //器件配置文件
- #include <intrins.h>
- #define Rin P3_7
- #define LCM_RW P1_1 //定义LCD引脚
- #define LCM_RS P1_0
- #define LCM_E P1_5
- #define LCM_Data P0
- #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 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);
- void Conut(void);
- unsigned char ReadDataLCM(void);
- unsigned char ReadStatusLCM(void);
- unsigned char code mcustudio[] ={"number:"};
- unsigned char code Cls[] = {" "};
- unsigned char code ASCII[10] = {'0','1','2','3','4','5','6','7','8','9'};
- static unsigned char DisNum = 0; //显示用指针
- unsigned int time=0;
- bit flag =0;
- unsigned char disbuff[4]={ 0,0,0,0,};
- unsigned long S = 0;
- volatile bit FlagSucceed=0; //测量成功标志
- sbit Beep=P2^0; //报警蜂鸣器
- sbit LedAlarm = P2^1;
- 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);
- }
- //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
- 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(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1
- if (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 ListLength;
- ListLength = 0;
- Y &= 0xFE;
- X &= 0xFF; //限制X不能大于15,Y不能大于1
- while (DData[ListLength]>0x19) //若到达字串尾则退出
- {
- if (X <= 0xF) //X坐标应小于0xF
- {
- DisplayOneChar(X, Y, DData[ListLength]); //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=TH0*256+TL0;
- TH0=0;
- TL0=0;
- S+=1; //算出来是
- Beep = 0;
- if((S>=1000)||flag==1) //超出测量范围显示“-”
- {
- flag=0;
-
- DisplayOneChar(0, 1, ASCII[0]);
- DisplayOneChar(1, 1, ASCII[1]);
- DisplayOneChar(2, 1, ASCII[2]);
- }
- else
- {
- disbuff[0]=S/100%10;
- disbuff[1]=S/10%10;
- disbuff[2]=S%10;
- DisplayOneChar(0, 1, ASCII[disbuff[0]]);
- DisplayOneChar(1, 1, ASCII[disbuff[1]]);
- DisplayOneChar(2, 1, ASCII[disbuff[2]]);
- }
- }
- /********************************************************/
- 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
- {
- Rin=0; //启动一次模块
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- _nop_();
- Rin=1;
- }
- /********************************************************/
- 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;
- LedAlarm = 1;
- 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);
- ReadDataLCM();//测试用句无意义
- for (TempCyc=0; TempCyc<10; TempCyc++)
- Delay400Ms(); //延时
- while(1)
- {
- StartModule();
- DisplayOneChar(0, 1, ASCII[0]);
- while(!Rin); //当RX为零时等待
- TR0=0; //关闭计数
-
- Conut(); //计算
- Beep = 1;
- delayms(80); //80MS
- while(Rin); //当RX为1计数并等待
- EA=0;
- //以下为一次检测过程;先发出Trin电平,打开外部中断,清零T1
- //最后在外部中断下降沿触发时取出T1当前值,计算出Trig脉冲宽度
- TR0=1; //开启计数
- Beep = 0;
- }
- }
-
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