Arduino串口读取夏普GP2Y1051

#define  FILTER_N 12
int pm25;
void setup()
{

  /* add setup code here */
Serial.begin(115200);
Serial1.begin(2400);
delay(1000);	//��ʱ�ȴ�GP2Y1051�ϵ磬�ȶ��������
}

void loop()
{

  /* add main program code here */
  float aa=median_average_filter();
  pm25=aa*800;
Serial.println(pm25);
}


float getVout()
{
	const int startByte=170;
	const int endByte  =255;
	int k=0;
	int data;
	int checkbit;
	int val[7];
	int i;
	while(Serial1.available())
	{
		if(Serial1.available()>7)
		{	
			data=Serial1.read();
			if(data==startByte)
			{
				k=0;
				val[k]=data;
			}
			else
			{
				k++;
				val[k]=data;
			}
			
			if (k==6)
			{for(i=0;i<7;i++)
      {Serial.print(" | ");
      Serial.print(val[i],HEX);
        }
				checkbit=val[1]+val[2]+val[3]+val[4];
				if (checkbit==val[5] && val[6==255])
				{
					float Vout=(val[1]*256.0+val[2])/1024*5.0;
					return Vout;
				}
			}
		}
		
	}
}





float median_average_filter()
{
	
	int i,j;
	float filter_temp;
	float filter_sum=0;
	float filter_buf[FILTER_N];
	
	for (i=0;ifilter_buf[i+1])
			{
				filter_temp=filter_buf[i];
				filter_buf[i]=filter_buf[i+1];
				filter_buf[i+1]=filter_temp;
			}
		}
	}
	//ȡ�����ֵ��Сֵ����ƽ��ֵ
	for (i=1;i

暂时记录代码，稍后详细说明。并补充Arduino串口缓冲区的问题。