#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 //定義LCD引腳
#define LCM_RS P2_2
#define LCM_E P2_0
#define LCM_Data P0
#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);
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; //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_RS = 1;
LCM_RW = 0;
LCM_Data = WDLCM;
LCM_E = 1; //若晶振速度太高可以在這后加小的延時
LCM_E = 0; //延時
}
//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_RS = 0;
LCM_RW = 0;
LCM_Data = WCLCM;
LCM_E = 1;
LCM_E = 0;
}
//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
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，釋放總線
}while(sta & 0x80);
}
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*1.7)/10; //算出來是CM*10
if((S>=7000)||flag==1) //超出測量范圍顯示“-”
{
flag=0;
DisplayOneChar(0, 1, ASCII[14]); //顯示D
DisplayOneChar(1, 1, ASCII[15]); //顯示I
DisplayOneChar(2, 1, ASCII[16]); //顯示S
DisplayOneChar(3, 1, ASCII[17]); //顯示T
DisplayOneChar(4, 1, ASCII[18]); //顯示A
DisplayOneChar(5, 1, ASCII[19]); //顯示N
DisplayOneChar(6, 1, ASCII[20]); //顯示C
DisplayOneChar(7, 1, ASCII[21]); //顯示E
DisplayOneChar(8, 1, ASCII[25]); //顯示:
// DisplayOneChar(9, 1, ASCII[23]); //顯示
DisplayOneChar(9, 1, ASCII[11]); //百位
DisplayOneChar(10, 1, ASCII[11]); //十位
DisplayOneChar(11, 1, ASCII[11]); //個位
DisplayOneChar(12, 1, ASCII[10]); //顯示.
DisplayOneChar(13, 1, ASCII[11]); //小數點后一位
DisplayOneChar(14, 1, ASCII[13]); //顯示C
DisplayOneChar(15, 1, ASCII[12]); //顯示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]); //顯示D
DisplayOneChar(1, 1, ASCII[15]); //顯示I
DisplayOneChar(2, 1, ASCII[16]); //顯示S
DisplayOneChar(3, 1, ASCII[17]); //顯示T
DisplayOneChar(4, 1, ASCII[18]); //顯示A
DisplayOneChar(5, 1, ASCII[19]); //顯示N
DisplayOneChar(6, 1, ASCII[20]); //顯示C
DisplayOneChar(7, 1, ASCII[21]); //顯示E
DisplayOneChar(8, 1, ASCII[25]); //顯示:
DisplayOneChar(9, 1, ASCII[disbuff[0]]);
DisplayOneChar(10, 1, ASCII[disbuff[1]]);
DisplayOneChar(11, 1, ASCII[disbuff[2]]);
DisplayOneChar(12, 1, ASCII[10]); //顯示.
DisplayOneChar(13, 1, ASCII[disbuff[3]]);
DisplayOneChar(14, 1, ASCII[13]); //顯示C
DisplayOneChar(15, 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
}
/********************************************************/
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);
}
}
}
/*********************************************************/
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