pwm.c

单片机红外解码及无线解码的应用

#include <reg51.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define POWER_MIN 60
#define ms_waiteAA  1
#define ms_waite55  2
#define ms_waiteA5	3
#define ms_waiteD1	4
//#define ms_waiteD2	5
sbit pwm1=P1^5;
sbit pwm2=P1^6;
uchar power1,power2,recdata;
uchar message=0;
uchar receive=0;


void delay(uchar count)//延时
{
uchar i,k;
i=0;
k=0;
for (k=0;k<count;k++)
for (i=0;i<30;i++);
}




void Initial(void)
{
IT0=1;
IT1=1;
IE0=0;
IE1=0;
EX0=1;
EX1=1;
SCON=0X50;
TMOD=0x20;
TH1=0xF3;//0xF3;2400
TL1=0xF3;
TR1=1;
ES=1;
PS=1;
EA=1;
power1=61;//0~80
power2=61;
message=ms_waiteAA;
}



void pwm(void)
{
uchar k=0;
while(k<=POWER_MIN)
{
if (power1<POWER_MIN)
if (k>=power1)
pwm1=0;
if (power2<POWER_MIN)
if (k>=power2)
pwm2=0;
delay(1);
k++;
}

pwm1=1;
pwm2=1;
}

void int0 (void)interrupt 0 
{
pwm();
}

void int1 (void)interrupt 2 
{
pwm();
}

void receiveINT (void) interrupt 4
{
uchar d;
if (TI==1)
TI=0;
else
RI=0;

d=SBUF;
	switch (message)
			{	
			case ms_waiteAA:
								if (d==0xAA)
		 						message=ms_waite55;
								else
								message=ms_waiteAA;
								break;
			case ms_waite55:
								if (d==0x55)
		 						message=ms_waiteA5;
								else
								message=ms_waiteAA;
								break;
			
		   case ms_waiteA5:
								if (d==0xA5)
		 						message=ms_waiteD1;
								else
								message=ms_waiteAA;
								break;	

			case ms_waiteD1:					
								recdata=d;
								receive=1;									
								message=ms_waiteAA;
								break;

			default :			message=ms_waiteAA;
			}


  }

main()
{
Initial();
while(1)
{
	if (receive==1)
	{
	receive=0;
		switch (recdata)
			{	
			case 0x0F://上
							if (power1>20)
							power1-=10;
							break;
			case 0x05://下
							if (power1<POWER_MIN)
							power1+=10;
							break;
			case 0x0A://左
							if (power2<POWER_MIN)
							power2+=10;
							break;
			case 0x09://右
							if (power2>20)
							power2-=10;
							break;
			default :
							break;
			}				
			

	}

}
}