標(biāo)題:
單片機(jī)超聲波測(cè)距和倒計(jì)時(shí)的定時(shí)器怎么弄?搞不清楚
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作者:
lj2443454061
時(shí)間:
2022-2-23 20:36
標(biāo)題:
單片機(jī)超聲波測(cè)距和倒計(jì)時(shí)的定時(shí)器怎么弄?搞不清楚
#include <reg52.h>
#include <intrins.h>
#include <lcd.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P3^0; //設(shè)置鍵
sbit key2=P3^1; //加鍵
sbit key3=P3^2; //減鍵
sbit key4=P3^3; //開始鍵
sbit beep=P2^4;
sbit trig=P1^1;
sbit echo=P1^0;
sbit RS=P2^0;
sbit RW=P2^1;
sbit EN=P2^2;
uchar djshi,djfen,djmiao=10;
uchar r,num,s;
uchar distance,t;
bit flag=0;
uchar code table1[]={"time: 00:00:00 "};
uchar code table2[]={" "};
uchar code table3[]={"chaochuceliangzhi"};
uchar cc[4]={0,0,0};
void LcdInit() //LCD初始化子程序
{
uchar i;
lcd_writecom(0x38); //開顯示
lcd_writecom(0x0c); //開顯示不顯示光標(biāo)
lcd_writecom(0x06); //寫一個(gè)指針加1
lcd_writecom(0x01); //清屏
lcd_writecom(0x80); //設(shè)置數(shù)據(jù)指針起點(diǎn)
for(i=0;i<16;i++)
{
lcd_writedate(table1[ i]);[ i]
}
lcd_writecom(0xc0);
for(i=0;i<17;i++)
{
lcd_writedate(table2[ i]);[ i]
}
}
void Timer0Init(void) //
{
TMOD = 0x11; //使用定時(shí)器T0的模式1 定時(shí)器T1的模式1
TL0 = 15536%256; //設(shè)置定時(shí)0初值
TH0 = 15536/256; //設(shè)置定時(shí)0初值
TR0 = 1; //定時(shí)器0開始計(jì)時(shí)
ET0=1;
EA=1;
}
/*******************************************************************************
* 函 數(shù) 名 : Delay1ms
* 函數(shù)功能 : 延時(shí)函數(shù)，延時(shí)1ms
* 輸 入 : c
* 輸 出 : 無
* 說 名 : 該函數(shù)是在22.1184MHZ晶振下，12分頻單片機(jī)的延時(shí)。
*******************************************************************************/
void Delay1ms(uint n)
{
uint x,y;
for(x=n;x>0;x--)
for(y=110;y>0;y--);
}
void write_sfm(uchar add,uchar date)
{
lcd_writecom(0x80+add);
lcd_writedate(date/10+0x30);
lcd_writedate(date%10+0x30);
lcd_writecom(0x80+add+1);
}
void keyscan()
{
if(key1==0)
{
Delay1ms(5);
if(key1==1)
{
num++;
TR0=0;
while(!key1);
if(num==1)
{
lcd_writecom(0x0f);
lcd_writecom(0x8D);
}
if(num==2)
{
lcd_writecom(0x8A);
}
if(num==3)
{
lcd_writecom(0x87);
}
if(num==4)
{
lcd_writecom(0x0c);
num=0;
TR0=1;
}
}
}
if(num==1)
{
if(key2==0)
{
Delay1ms(5);
if(key2==0)
{
djmiao++;
while(!key2);
if(djmiao==60)
djmiao=0;
lcd_writecom(0x8c);
lcd_writedate(djmiao/10+0x30);
lcd_writedate(djmiao%10+0x30);
lcd_writecom(0x8D);
}
}
if(key3==0)
{
Delay1ms(5);
if(key3==0)
{
djmiao--;
while(!key3);
if(djmiao==255)
djmiao=59;
lcd_writecom(0x8c);
lcd_writedate(djmiao/10+0x30);
lcd_writedate(djmiao%10+0x30);
lcd_writecom(0x8D);
}
}
}
if(num==2)
{
if(key2==0)
{
Delay1ms(5);
if(key2==0)
{
djfen++;
while(!key2);
if(djfen==60)
djfen=0;
lcd_writecom(0x89);
lcd_writedate(djfen/10+0x30);
lcd_writedate(djfen%10+0x30);
lcd_writecom(0x8A);
}
}
if(key3==0)
{
Delay1ms(5);
if(key3==0)
{
djfen--;
while(!key3);
if(djfen==255)
djfen=59;
lcd_writecom(0x89);
lcd_writedate(djfen/10+0x30);
lcd_writedate(djfen%10+0x30);
lcd_writecom(0x8A);
}
}
}
if(num==3)
{
if(key2==0)
{
Delay1ms(5);
if(key2==0)
{
djshi++;
while(!key2);
if(djshi==24)
djshi=0;
lcd_writecom(0x86);
lcd_writedate(djshi/10+0x30);
lcd_writedate(djshi%10+0x30);
lcd_writecom(0x88);
}
}
if(key3==0)
{
Delay1ms(5);
if(key3==0)
{
djshi--;
while(!key3);
if(djshi==255)
djshi=23;
lcd_writecom(0x86);
lcd_writedate(djshi/10+0x30);
lcd_writedate(djshi%10+0x30);
lcd_writecom(0x88);
}
}
}
if(key4==0)
{
Delay1ms(5);
if(key4==0)
{
s++;
while(!key4);
if(s==1)
{
TR0=0;
}
if(s==2)
{
TR0=1;
}
if(s==3)
{
s=0;
TR0=0;
LcdInit();
djshi=0;
djfen=0;
djmiao=0;
}
}
}
}
void fmq()
{
beep=1;
Delay1ms(5);
beep=0;
Delay1ms(5);
}
void main()
{
LcdInit();
Timer0Init();
trig=0;
TH1=TL1=0;
trig=1;
TR1=1;
Delay1ms(1);
trig=0;
TR1=0;
while(echo==0);
TR1=1;
while(echo==1)
TR1=0;
t=TH1*256+TL0;
s=t*0.017;
lcd_writecom(0xc0);
lcd_writedate(s/100+0x30);
while(1)
{
keyscan();
if(djshi==0 && djfen==0 &&djmiao==0) //倒計(jì)時(shí)時(shí)間到
{
TR0=0; //停止計(jì)時(shí)
fmq();
}
}
}
void Timer0() interrupt 1
{
TL0 = 15536%256; //設(shè)置定時(shí)初值
TH0 = 15536/256; //設(shè)置定時(shí)初值
r++;
if(r==20)
{
r=0;
djmiao--;
if(djmiao==255)
{
djmiao=59;
djfen--;
if(djfen==255)
{
djfen=59;
djshi--;
if(djshi==255)
{
djshi=0;
}
if(djshi==0)
djfen=59;
if(djfen==0&djshi==0)
djfen=0;
write_sfm(6,djshi);
}
write_sfm(9,djfen);
}
write_sfm(12,djmiao);
}
}
作者:
heicad
時(shí)間:
2022-2-23 21:45
哪一行搞不清楚?大家?guī)湍阊芯肯?hr noshade size="2" width="100%" color="#808080">
作者:
lj2443454061
時(shí)間:
2022-2-24 21:29
使用超聲波測(cè)距程序的時(shí)候，倒計(jì)時(shí)程序不能使用，而且我不知道怎么同時(shí)使用兩個(gè)定時(shí)器，用兩個(gè)定時(shí)器的時(shí)候，倒計(jì)時(shí)等于0后，定時(shí)器1好像沒有關(guān)閉，倒計(jì)時(shí)會(huì)重新驅(qū)動(dòng)
作者:
yzwzfyz
時(shí)間:
2022-2-26 14:03
去看書，重點(diǎn)了解：
1、如何設(shè)置定時(shí)器。
2、如何起動(dòng)定時(shí)器。
3、如何停止定時(shí)器計(jì)數(shù)工作。
明白后再研究一下程序。
歡迎光臨 (http://www.torrancerestoration.com/bbs/)
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