超声波LCD显示测距程序.docx
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超声波LCD显示测距程序
/******************************************************************************/
/*Name:
LCD12864（St7920/St7921）+超声波测距模块+STC89C52*/
/*DYP-ME007超声波测距模块DEMO程序*/
/*晶振：
11.0592M*/
*/
/*接线：
模块TRIG接P1.2ECH0接P1.1*/
/*RS（CS）接P3.3;*/
/*RW（SID）接P3.4;*/
/*E（SCLK）接P3.5;*/
/*PSB接GND串行模式*/
/******************************************************************************/
#include
#include
//引脚定义
sbitRX=P1^1;
sbitTX=P1^2;
sbitCS=P3^3;//片选高电平有效单片LCD使用时可固定高电平
sbitSID=P3^4;//数据
sbitSCLK=P3^5;//时钟
//FunctionDefinition 函数声明
voidDelay（intnum）;
voidInit_DS18B20（void）;
unsignedcharReadOneChar（void）;
voidWriteOneChar（unsignedchardat）;
unsignedintReadTemperature（void）;
voidclock_out（unsignedchardd）;
unsignedcharclock_in（void）;
unsignedcharread_clock（unsignedcharord）;
voidwrite_clock（unsignedcharord,unsignedchardd）;
voidDisp（void）;
voidid_case1_key（void）;
voidid_case2_key（void）;
voidSet_time（unsignedcharsel,bitsel_1）;
voidTimer0_Init（void）;
voidInit_1302（void）;
voidSet_Bell（unsignedcharsel,bitsel_1）;
voidBell（void）;
//12864
voidWrite_char（bitstart,unsignedcharddata）;
voidSend_byte（unsignedcharbbyte）;
voidDelaynms（unsignedintdi）;
voidLcd_init（void）;
voidDisp_img（unsignedchar*img）;
voidLCD_Write_string（unsignedcharX,unsignedcharY,unsignedchar*s）;
voidLCD_set_xy（unsignedcharx,unsignedchary）;
unsignedcharcode:
.-"};
unsignedcharcodewaves[]={"超声波测距系统"};
unsignedcharcodeznwk[]={"智能微控工作室"};
unsignedcharcodeCM[]={"M"};
unsignedinttime=0;
longS=0;
bitflag=0;
unsignedchardisbuff[4]={0,0,0,0,};
unsignedcharcodelogo[]={
/*--调入了一幅图像：
logo.bmp--*/
/*--宽度x高度=128x64欢迎使用本产品LOGO--*/
/*--调入了一幅图像：
C:
\DocumentsandSettings\lwd\桌面\新建文件夹\X.bmp--*/
/*--宽度x高度=128x64--*/
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};
/******************************************************************************/
voidLcd_init（void）//初始化LCD
{
Delaynms（10）;//启动等待，等LCM讲入工作状态
CS=1;
Write_char（0,0x30）;//8位介面，基本指令集
Write_char（0,0x0c）;//显示打开，光标关，反白关
Write_char（0,0x01）;//清屏，将DDRAM的地址计数器归零
}
/******************************************************************************/
voidWrite_char（bitstart,unsignedcharddata）//写指令或数据
{
unsignedcharstart_data,Hdata,Ldata;
if（start==0）
start_data=0xf8;//写指令
else
start_data=0xfa;//写数据
Hdata=ddata&0xf0;//取高四位
Ldata=（ddata<<4）&0xf0;//取低四位
Send_byte（start_data）;//发送起始信号
Delaynms（5）;//延时是必须的
Send_byte（Hdata）;//发送高四位
Delaynms
（1）;//延时是必须的
Send_byte（Ldata）;//发送低四位
Delaynms
（1）;//延时是必须的
}
/******************************************************************************/
voidSend_byte（unsignedcharbbyte）//发送一个字节
{
unsignedchari;
for（i=0;i<8;i++）
{
SID=bbyte&0x80;//取出最高位
SCLK=1;
SCLK=0;
bbyte<<=1;//左移
}
}
/******************************************************************************/
voidDelaynms（unsignedintdi）//延时
{
unsignedintda,db;
for（da=0;dafor（db=0;db<10;db++）;
}
/******************************************************************************/
voidDisp_img（unsignedchar*img）//图形方式12864显示字模221横向取膜
{
unsignedchari,j;
unsignedintk=0;
Write_char（0,0x36）;//图形方式
for（i=0;i<32;i++）
{
Write_char（0,0x80+i）;
Write_char（0,0x80）;
for（j=0;j<16;j++）
{
Write_char（1,img[k++]）;
}
}
for（i=0;i<32;i++）
{
Write_char（0,0x80+i）;
Write_char（0,0x88）;
for（j=0;j<16;j++）
{
Write_char（1,img[k++]）;
}
}
}
/******************************************************************************/
voidClr_Scr（void）//清屏函数
{
Write_char（0,0x01）;
}
/******************************************************************************/
voidLCD_set_xy（unsignedcharx,unsignedchary）
{//设置LCD显示的起始位置，X为行，Y为列
unsignedcharaddress;
switch（x）
{
case0:
address=0x80+y;break;
case1:
address=0x80+y;break;
case2:
address=0x90+y;break;
case3:
address=0x88+y;break;
case4:
address=0x98+y;break;
default:
address=0x80+y;break;
}
Write_char（0,address）;
}
/******************************************************************************/
voidLCD_Write_string（unsignedcharX,unsignedcharY,unsignedchar*s）
{//中英文字符串显示函数
LCD_set_xy（X,Y）;
while（*s）
{
Write_char（1,*s）;
s++;
Delaynms
（1）;
}
}
/******************************************************************************/
voidLCD_Write_number（unsignedchars）//数字显示函数
{
Write_char（1,num[s]）;
Delaynms
（1）;
}
/******************************************************************************/
voidLcd_Mark2（void）
{
Clr_Scr（）;//清屏
LCD_Write_string（1,0,znwk）;//
LCD_Write_string（2,0,waves）;//
LCD_Write_string（3,7,CM）;//
}
/********************************************************/
voidConut（void）
{
time=TH0*256+TL0;
TH0=0;
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