單片機C語言程序舉例(三)

//此程序在硬件上調(diào)試通過
//本程序的單片機晶振采用11.0592M
#include
sbit speaker=P1^2;
unsigned char timer0h,timer0l,time;
//世上只有媽媽好數(shù)據(jù)表
code unsigned char sszymmh[]={ 6,2,3, 5,2,1, 3,2,2, 5,2,2, 1,3,2, 6,2,1, 5,2,1,
6,2,4, 3,2,2, 5,2,1, 6,2,1, 5,2,2, 3,2,2, 1,2,1,
6,1,1, 5,2,1, 3,2,1, 2,2,4, 2,2,3, 3,2,1, 5,2,2,
5,2,1, 6,2,1, 3,2,2, 2,2,2, 1,2,4, 5,2,3, 3,2,1,
2,2,1, 1,2,1, 6,1,1, 1,2,1, 5,1,6, 0,0,0
};
// 音階頻率表 高八位
code unsigned char FREQH[]={
0xF2,0xF3,0xF5,0xF5,0xF6,0xF7,0xF8,
0xF9,0xF9,0xFA,0xFA,0xFB,0xFB,0xFC,0xFC, //1,2,3,4,5,6,7,8,i
0xFC,0xFD,0xFD,0xFD,0xFD,0xFE,
0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFF,
} ;
// 音階頻率表 低八位
code unsigned char FREQL[]={
0x42,0xC1,0x17,0xB6,0xD0,0xD1,0xB6,
0x21,0xE1,0x8C,0xD8,0x68,0xE9,0x5B,0x8F, //1,2,3,4,5,6,7,8,i
0xEE,0x44, 0x6B,0xB4,0xF4,0x2D,
0x47,0x77,0xA2,0xB6,0xDA,0xFA,0x16,
};
void delay(unsigned char t)
{
unsigned char t1;
unsigned long t2;
for(t1=0;t1 {
for(t2=0;t2<8000;t2++)
{
;
}
}
TR0=0;
}
void t0int() interrupt 1
{
TR0=0;
speaker=!speaker;
TH0=timer0h;
TL0=timer0l;
TR0=1;
}
void song()
{
TH0=timer0h;
TL0=timer0l;
TR0=1;
delay(time);
}

void main(void)
{
unsigned char k,i;
TMOD=1; //置CT0定時工作方式1
EA=1;
ET0=1;//IE=0x82 //CPU開中斷,CT0開中斷
while(1)
{
i=0;
while(i<100){ //音樂數(shù)組長度，唱完從頭再來
k=sszymmh[i]+7*sszymmh[i+1]-1;
timer0h=FREQH[k];
timer0l=FREQL[k];
time=sszymmh[i+2];
i=i+3;
song();
}
}
}

15.紅外收發(fā)演示

#include

sbit LED=P3^3;//紅外發(fā)射
sbit LED1=P1^3;
sbit IR=P3^2;//紅外一體化接收

bit Flag;

void Init_Timer0(void)
{
TMOD |= 0x01;
TH0=0xf0;
TL0=0x00;
EA=1;
ET0=1;
TR0=1;
}

void Timer0_isr(void) interrupt 1 using 1
{
TH0=0x0f;
TL0=0x00;
Flag=!Flag;
}

main()
{

unsigned int j;
Init_Timer0();

while(1)
{

LED1=IR;//讀取一體化接收頭數(shù)值
if(Flag)
{
for(j=0;j<27;j++)//大約38KHz
{
LED=!LED;//發(fā)射管輸出
}
}
}
}

16.串口通信

//打開串口調(diào)試程序，將波特率設(shè)置為2400，無奇偶校驗

#include

#include

#ifdef MONITOR51
char code reserve [3] _at_ 0x23;
#endif

sbit KEY=P3^2;

void delay(unsigned int U)
{
while(--U);
}

void main (void)
{

#ifndef MONITOR51
SCON = 0x50;
TMOD |= 0x20;
TH1 = 0xf3;
TR1 = 1;
TI = 1;
#endif

while (1)
{

if(!KEY)
{
delay(10000);
if(!KEY)
{
printf ("This programer test ok!n");
printf ("12:25:26n");
}
}
}
}

17.PWM調(diào)光

#include

sbit LED = P1^2;
unsigned char CYCLE; //定義周期 該數(shù)字X基準定時時間 如果是10 則周期是10 x 0.1ms
unsigned char PWM_ON ;//定義高電平時間
void delay(unsigned int cnt)
{
while(--cnt);
}

main()
{
bit Flag;

TMOD |=0x01;//定時器設(shè)置 0.1ms in 12M crystal
TH0=(65536-100)/256;
TL0=(65536-100)%256;//定時0.1mS
IE= 0x82; //打開中斷
TR0=1;

CYCLE = 10;// 時間可以調(diào)整 這個是10調(diào)整 8位PWM就是256步
while(!Flag)
{
delay(20000); //延時時間，從一個亮度到下一個亮度的間隔時間，速度快就能看到連續(xù)效果
PWM_ON++; //這個使用較長延時，以便能看清楚變化過程
if(PWM_ON == CYCLE)
{ //這個里可以添加其他程序 如到最亮時候控制設(shè)備
Flag=1;
}
}

while(Flag) //亮度遞減 同上，是個相反的過程
{
delay(20000);
PWM_ON--;
if(PWM_ON == 0)
{
Flag=0;
}
}
}



void tim(void) interrupt 1 using 1
{
static unsigned char count; //
TH0=(65536-100)/256;
TL0=(65536-100)%256;//定時0.1mS

if (count==PWM_ON)
{
LED = 1; //燈滅
}
count++;
if(count == CYCLE)
{
count=0;
if(PWM_ON!=0) //如果左右時間是0 保持原來狀態(tài)
LED = 0;//燈亮

}

}