单片机C言语程序举例(一)

本着一起学习，一起进步的意图，把我搞到的材料任劳任怨的发上来，供初学者参阅，期望能够对咱们有协助！一切程序是自己买www.doflye.cn 上海浩豚电子科技的开发板赠送的。

1.流水灯C程序

#include
////////////////////////////////////////////////////////
void delay(unsigned int cnt) //简略的延时
{
while(–cnt);
}
///////////////////////////////////////////////////////
main()
{
P1=0xfe;//给初始化值
while(1)
{
delay(30000);//delay at crystal frequency in 12MHz
P1<<=1;//左移一位
P1|=0x01;//最终一位补1
if(P1==0x7f)//检测是否移到最左端？
{
delay(30000);//delay
P1=0xfe;
}
}
}

2.数码管动态扫描C程序

#include

unsigned char const dofly[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};// 显现段码值01234567
unsigned char code seg[]={0,1,2,3,4,5,6,7};//别离对应相应的数码管点亮
////////////////////////////////////////////////////////
void delay(unsigned int cnt)
{
while(–cnt);
}
///////////////////////////////////////////////////////
main()
{
unsigned char i;

while(1)
{

P0=dofly[i];//取显现数据
P2=seg[i]; //取段码
delay(200); //扫描空隙延时
i++;
if(8==i) //检测8位扫描彻底？
i=0;
}
}
3.LED
／＼／＼
＼　　／
＼／点阵C程序

#include

unsigned char const dofly[]={0x00,0x6C,0x92,0x82,0x44,0x28,0x10,0x00};// 心的形状
unsigned char code seg[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};//别离对应相应的段亮
////////////////////////////////////////////////////////
void delay(unsigned int cnt)
{
while(–cnt);
}
///////////////////////////////////////////////////////
main()
{
unsigned char i;

while(1)
{

P0=dofly[i];//取显现数据
P2=seg[i]; //取段码
delay(200); //扫描空隙延时
i++;
if(8==i)
i=0;
}
}

4.实时时钟RTC

#include
#include

sbit SCK=P3^6;
sbit SDA=P3^4;
sbit RST = P3^5; // DS1302复位

bit ReadRTC_Flag;

unsigned char l_tmpdate[7]={0,0,12,15,5,3,8};//秒分时日月周年08-05-15 12:00:00
unsigned char l_tmpdisplay[8];
code unsigned char write_rtc_address[7]={0x80,0x82,0x84,0x86,0x88,0x8a,0x8c}; //秒分时日月周年 最低位读写位
code unsigned char read_rtc_address[7]={0x81,0x83,0x85,0x87,0x89,0x8b,0x8d};

code unsigned char table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40};
//共阴数码管 0-9 – 平息‘表
code unsigned char table1[]={0,1,2,3,4,5,6,7};
//显现位码表

void Write_Ds1302_byte(unsigned char temp);
void Write_Ds1302( unsigned char address,unsigned char dat );
unsigned char Read_Ds1302 ( unsigned char address );

void Read_RTC(void);//read RTC
void Set_RTC(void); //set RTC

void InitTIMER0(void);//inital timer0

void main(void)
{
InitTIMER0();
Set_RTC();
while(1){
if(ReadRTC_Flag)
{
ReadRTC_Flag=0;
Read_RTC();
switch (l_tmpdate[0]/5) //规划每个5秒替换显现年月日 时分秒
{
case 0:
case 2:
case 4:
case 6:
case 8:
case 10:
l_tmpdisplay[0]=l_tmpdate[2]/16;//数据的转化，因咱们选用数码管0~9的显现,将数据分隔
l_tmpdisplay[1]=l_tmpdate[2]&0x0f;
l_tmpdisplay[2]=10; //参加”-“
l_tmpdisplay[3]=l_tmpdate[1]/16;
l_tmpdisplay[4]=l_tmpdate[1]&0x0f;
l_tmpdisplay[5]=10;
l_tmpdisplay[6]=l_tmpdate[0]/16;
l_tmpdisplay[7]=l_tmpdate[0]&0x0f;
break;
case 1:
case 3:
case 5:
case 7:
case 9:
case 11:
l_tmpdisplay[0]=l_tmpdate[6]/16;
l_tmpdisplay[1]=l_tmpdate[6]&0x0f;
l_tmpdisplay[2]=10;
l_tmpdisplay[3]=l_tmpdate[4]/16;
l_tmpdisplay[4]=l_tmpdate[4]&0x0f;
l_tmpdisplay[5]=10;
l_tmpdisplay[6]=l_tmpdate[3]/16;
l_tmpdisplay[7]=l_tmpdate[3]&0x0f;
break;
default:
break;
}

}
}
}

void InitTIMER0(void)
{
TMOD|=0x01;//定时器设置 16位
TH0=0xef;//初始化值
TL0=0xf0;
ET0=1;
TR0=1;
EA=1;
}

void Write_Ds1302_Byte(unsigned char temp)
{
unsigned char i;
for (i=0;i<8;i++) //循环8次 写入数据
{
SCK=0;
SDA=temp&0x01; //每次传输低字节
temp>>=1; //右移一位
SCK=1;
}
}

void Write_Ds1302( unsigned char address,unsigned char dat )
{
RST=0;
_nop_();
SCK=0;
_nop_();
RST=1;
_nop_(); //发动
Write_Ds1302_Byte(address);//发送地址
Write_Ds1302_Byte(dat);//发送数据
RST=0; //康复
}

unsigned char Read_Ds1302 ( unsigned char address )
{
unsigned char i,temp=0x00;
RST=0;
_nop_();
SCK=0;
_nop_();
RST=1;
_nop_();
Write_Ds1302_Byte(address);
for (i=0;i<8;i++) //循环8次 读取数据
{
if(SDA)
temp|=0x80;//每次传输低字节
SCK=0;
temp>>=1;//右移一位
SCK=1;
}
RST=0;
_nop_();//以下为DS1302复位的安稳时刻
RST=0;
SCK=0;
_nop_();
SCK=1;
_nop_();
SDA=0;
_nop_();
SDA=1;
_nop_();
return (temp);//回来
}

void Read_RTC(void)//读取日历
{
unsigned char i,*p;
p=read_rtc_address; //地址传递
for(i=0;i<7;i++)//分7次读取秒分时日月周年
{
l_tmpdate[i]=Read_Ds1302(*p);
p++;
}
}

void Set_RTC(void)//设定 日历
{
unsigned char i,*p,tmp;
for(i=0;i<7;i++){ //BCD处理
tmp=l_tmpdate[i]/10;
l_tmpdate[i]=l_tmpdate[i]%10;
l_tmpdate[i]=l_tmpdate[i]+tmp*16;
}
Write_Ds1302(0x8E,0X00);

p=write_rtc_address;//传地址
for(i=0;i<7;i++)//7次写入秒分时日月周年
{
Write_Ds1302(*p,l_tmpdate[i]);
p++;
}
Write_Ds1302(0x8E,0x80);
}

void tim(void) interrupt 1 using 1//中止，用于数码管扫描
{

static unsigned char i,num;
TH0=0xf5;
TL0=0xe0;

P0=table[l_tmpdisplay[i]];//查表法得到要显现数字的数码段
P2=table1[i];
i++;
if(i==8)
{
i=0;
num++;
if(10==num) //隔段时刻读取1302的数据。时刻距离能够调整
{
ReadRTC_Flag=1; //运用标志位判别
num=0;
}

}
}

5.4*4矩阵键盘

//队伍扫描程序，能够自己界说端口和扫描方法，这儿做简略介绍
#include //包括头文件
#define uchar unsigned char
#define uint unsigned int

unsigned char const dofly[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,
0x77,0x7c,0x39,0x5e,0x79,0x71};//0-F

uchar keyscan(void);
void delay(uint i);

void main()
{
uchar key;
P2=0x00;//1数码管亮 按相应的按键，会显现按键上的字符
while(1)
{
key=keyscan();//调用键盘扫描，
switch(key)
{
case 0x7e:P0=dofly[0];break;//0 按下相应的键显现相对应的码值
case 0x7d:P0=dofly[1];break;//1
case 0x7b:P0=dofly[2];break;//2
case 0x77:P0=dofly[3];break;//3
case 0xbe:P0=dofly[4];break;//4
case 0xbd:P0=dofly[5];break;//5
case 0xbb:P0=dofly[6];break;//6
case 0xb7:P0=dofly[7];break;//7
case 0xde:P0=dofly[8];break;//8
case 0xdd:P0=dofly[9];break;//9
case 0xdb:P0=dofly[10];break;//a
case 0xd7:P0=dofly[11];break;//b
case 0xee:P0=dofly[12];break;//c
case 0xed:P0=dofly[13];break;//d
case 0xeb:P0=dofly[14];break;//e
case 0xe7:P0=dofly[15];break;//f
}
}
}
uchar keyscan(void)//键盘扫描函数，运用队伍回转扫描法
{
uchar cord_h,cord_l;//队伍值
P3=0x0f; //行线输出全为0
cord_h=P3&0x0f; //读入列线值
if(cord_h!=0x0f) //先检测有无按键按下
{
delay(100); //去抖
if(cord_h!=0x0f)
{
cord_h=P3&0x0f; //读入列线值
P3=cord_h|0xf0; //输出当前列线值
cord_l=P3&0xf0; //读入行线值
return(cord_h+cord_l);//键盘最终组合码值
}
}return(0xff); //回来该值
}

void delay(uint i)//延时函数
{
while(i–);
}

6.红外解码LCD显现

//该程序运用LCD1602显现
#include
#include
#include

////////////////////////////////////////////////
#define TURE 1
#define FALSE 0

////////////////////////////////////////////////

sbit IR=P3^2;//红外接口标志
sbit RS = P2^4;//Pin4
sbit RW = P2^5; //Pin5
sbit E = P2^6;//Pin6

#define Data P0 //数据端口

unsigned int hour,minute,second,count;
char code Tab[16]=”0123456789ABCDEF”;

char data TimeNum[]=” “;
char data Test1[]=” “;

////////////////////////////////////////////

unsigned char irtime;//红外用全局变量

bit irpro_ok,irok;
unsigned char IRcord[4];
unsigned char irdata[33];
void ShowString (unsigned char line,char *ptr);

//////////////////////////////////////////////

void Delay(unsigned char mS);
void Ir_work(void);
void Ircordpro(void);

////////////////////////////////////////////////////////////////
void Delay(unsigned char mS)//delay mS
{
unsigned char us,usn;

while(mS!=0)
{
usn = 4;
while(usn!=0)
{
us=0xf0;
while (us!=0) {us–;};
usn–;
}

mS–;

}
}

//////////////////////////////////////////////////////////////////
/

void Ir_work(void)//红外键值散转程序
{

TimeNum[5] = Tab[IRcord[0]/16];
TimeNum[6] = Tab[IRcord[0]%16];
TimeNum[8] = Tab[IRcord[1]/16];
TimeNum[9] = Tab[IRcord[1]%16];
TimeNum[11] = Tab[IRcord[2]/16];
TimeNum[12] = Tab[IRcord[2]%16];
TimeNum[14] = Tab[IRcord[3]/16];
TimeNum[15] = Tab[IRcord[3]%16];

ShowString(1,TimeNum);

irpro_ok=0;

}

void Ircordpro(void)//红外码值处理函数
{
unsigned char i, j, k;
unsigned char cord,value;

k=1;
for(i=0;i<4;i++)//处理4个字节
{
for(j=1;j<=8;j++) //处理1个字节8位
{
cord=irdata[k];
if(cord>7)//大于某值为1
{
value=value|0x80;
}
else
{
value=value;
}
if(j<8)
{
value=value>>1;
}
k++;
}
IRcord[i]=value;
value=0;
} irpro_ok=1;//处理完毕标志方位1

}

void DelayUs(unsigned char us)//delay us
{
unsigned char uscnt;
uscnt=us>>1;
while(–uscnt);
}

void DelayMs(unsigned char ms)//delay Ms
{
while(–ms)
{
DelayUs(250);
DelayUs(250);
DelayUs(250);
DelayUs(250);
}
}
void WriteCommand(unsigned char c)
{
DelayMs(5);//short delay before operation
E=0;
RS=0;
RW=0;
_nop_();
E=1;
Data=c;
E=0;
}

void WriteData(unsigned char c)
{
DelayMs(5); //short delay before operation
E=0;
RS=1;
RW=0;
_nop_();
E=1;
Data=c;
E=0;
RS=0;
}

void ShowChar(unsigned char pos,unsigned char c)
{
unsigned char p;
if (pos>=0x10)
p=pos+0xb0; //是第二行则指令代码高4位为0xc
else
p=pos+0x80; //是第二行则指令代码高4位为0x8
WriteCommand (p);//write command
WriteData (c); //write data
}

void ShowString (unsigned char line,char *ptr)
{
unsigned char l,i;
l=line<<4;
for (i=0;i<16;i++)
ShowChar (l++,*(ptr+i));//循环显现16个字符
}

void InitLcd()
{
DelayMs(15);
WriteCommand(0x38); //display mode
WriteCommand(0x38); //display mode
WriteCommand(0x38); //display mode
WriteCommand(0x06); //显现光标移动方位
WriteCommand(0x0c); //显现开及光标设置
WriteCommand(0x01); //显现清屏

}

/////////////////////////////////////////////////////////////////

void main(void)
{
EX0init(); // Enable Global Interrupt Flag
TIM0init();

InitLcd();//
DelayMs(15);

sprintf(Test1,” www.haotun.com “);//the first line
ShowString(0,Test1);

sprintf(TimeNum,”Code “);//the second line
ShowString(1,TimeNum);

while(1)//主循环
{
if(irok)
{
Ircordpro();
irok=0;
}

if(irpro_ok)//step press key
{
Ir_work();
}
}
}

7.蜂鸣器

#include

sbit SPK=P1^2;//界说蜂鸣器端口

void delay(unsigned int cnt)//延时
{
while(–cnt);
}

main()
{
unsigned int i;
while(1)
{
for(i=0;i<200;i++)//喇叭发声的时刻循环，改动巨细能够改动发声时刻长短
{
delay(80);//参数决议发声的频率，预算值
SPK=!SPK;
}
SPK=1; //喇叭停止工作，间歇的时刻，可更改
delay(20000);

}
}