|
超声波测距
单片机源程序如下:
- /*********************************************************************************
- * 【编写时间】: 5月18日
- * 【作 者】: 1277668379
- * 【版 本】: 1.0
- * 【网 站】:
- * 【实验平台】: 单片机开发板
- * 【外部晶振】: 11.0592mhz
- * 【主控芯片】: STC89C52
- * 【编译环境】: Keil μVisio5
- * 【程序功能】: LCD1602显示超声波测距
- * 【使用说明】: 见下文
- **********************************************************************************/
- /*
- SMC1602A(16*2)模拟口线接线方式
- 连接线图:
- ---------------------------------------------------
- |LCM-----51 | LCM-----51 | LCM------51 |
- --------------------------------------------------|
- |DB0-----P0.0 | DB4-----P0.4 | RW-------P2.1 |
- |DB1-----P0.1 | DB5-----P0.5 | RS-------P2.2 |
- |DB2-----P0.2 | DB6-----P0.6 | E--------P2.0 |
- |DB3-----P0.3 | DB7-----P0.7 | VLCD接1K电阻到GND|
- ---------------------------------------------------
- 接线:模块TRIG接 P3.0 RXD ECH0 接P3.1 TXD
- 本程序源码只供学习参考,不得应用于商业用途,如有需要请联系作者。
- [注:AT89x51使用12M或11.0592M晶振,实测使用11.0592M]
- =============================================================*/
- #include <AT89x51.H> //器件配置文件
- #include <intrins.h>
- #define RX P3_1
- #define TX P3_0
- #define LCM_RW P2_1 //定义LCD引脚
- #define LCM_RS P2_2
- #define LCM_E P2_0
- #define LCM_Data P0
- #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);
- unsigned char ReadDataLCM(void);
- void ReadStatusLCM(void);
- unsigned char code mcustudio[] ={" LIU HENG RUI "};
- unsigned char code email[] = {" QQ:1277668379 "};
- unsigned char code Cls[] = {" "};
- unsigned char code ASCII[30] = {'0','1','2','3','4','5','6','7','8','9','.','-','M','C','D','I','S','T','A','N','C','E','T','H','E',':'};
- // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
- static unsigned char DisNum = 0; //显示用指针
- unsigned int time=0;
- unsigned long S=0;
- bit flag =0;
- unsigned char disbuff[4] ={ 0,0,0,0,};
- //写数据
- void WriteDataLCM(unsigned char WDLCM)
- {
- ReadStatusLCM(); //检测忙
- LCM_RS = 1;
- LCM_RW = 0;
- LCM_Data = WDLCM;
- LCM_E = 1; //若晶振速度太高可以在这后加小的延时
- LCM_E = 0; //延时
- }
- //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_RS = 0;
- LCM_RW = 0;
- LCM_Data = WCLCM;
- LCM_E = 1;
- LCM_E = 0;
- }
- //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
- void ReadStatusLCM(void)
- {
- unsigned char sta;
- LCM_Data = 0xFF;
- LCM_RS = 0;
- LCM_RW = 1;
- do
- {
- LCM_E = 1;
- sta = LCM_Data;
- LCM_E = 0; //使能,用完就拉低,释放总线
- }while(sta & 0x80);
- }
- 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 &= 0x1;
- X &= 0xF; //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=(time*1.7)/10; //算出来是CM*10
- if((S>=7000)||flag==1) //超出测量范围显示“-”
- {
- flag=0;
- DisplayOneChar(0, 1, ASCII[14]); //显示D
- DisplayOneChar(1, 1, ASCII[15]); //显示I
- DisplayOneChar(2, 1, ASCII[16]); //显示S
- DisplayOneChar(3, 1, ASCII[17]); //显示T
- DisplayOneChar(4, 1, ASCII[18]); //显示A
- DisplayOneChar(5, 1, ASCII[19]); //显示N
- DisplayOneChar(6, 1, ASCII[20]); //显示C
- DisplayOneChar(7, 1, ASCII[21]); //显示E
- DisplayOneChar(8, 1, ASCII[25]); //显示:
- // DisplayOneChar(9, 1, ASCII[23]); //显示
- DisplayOneChar(9, 1, ASCII[11]); //百位
- DisplayOneChar(10, 1, ASCII[11]); //十位
- DisplayOneChar(11, 1, ASCII[11]); //个位
- DisplayOneChar(12, 1, ASCII[10]); //显示.
- DisplayOneChar(13, 1, ASCII[11]); //小数点后一位
- DisplayOneChar(14, 1, ASCII[13]); //显示C
- DisplayOneChar(15, 1, ASCII[12]); //显示M
- }
- else
- {
- disbuff[0]=S%10000/1000;
- disbuff[1]=S%10000%1000/100;
- disbuff[2]=S%10000%1000%100/10;
- disbuff[3]=S%10000%1000%100%10;
-
- DisplayOneChar(0, 1, ASCII[14]); //显示D
- DisplayOneChar(1, 1, ASCII[15]); //显示I
- DisplayOneChar(2, 1, ASCII[16]); //显示S
- DisplayOneChar(3, 1, ASCII[17]); //显示T
- DisplayOneChar(4, 1, ASCII[18]); //显示A
- DisplayOneChar(5, 1, ASCII[19]); //显示N
- DisplayOneChar(6, 1, ASCII[20]); //显示C
- DisplayOneChar(7, 1, ASCII[21]); //显示E
- DisplayOneChar(8, 1, ASCII[25]); //显示:
-
- DisplayOneChar(9, 1, ASCII[disbuff[0]]);
- DisplayOneChar(10, 1, ASCII[disbuff[1]]);
- DisplayOneChar(11, 1, ASCII[disbuff[2]]);
- DisplayOneChar(12, 1, ASCII[10]); //显示.
- DisplayOneChar(13, 1, ASCII[disbuff[3]]);
- DisplayOneChar(14, 1, ASCII[13]); //显示C
- DisplayOneChar(15, 1, ASCII[12]); //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_();
- _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;
- ……………………
- …………限于本文篇幅 余下代码请从51黑下载附件…………
复制代码
所有资料51hei提供下载:
超声波测距LCD1602自改.zip
(39.51 KB, 下载次数: 25)
|
|