#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);
}
}
}
/*********************************************************/
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