标题: Arduino亮度檢查報警程序 [打印本页]

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作者: ndl0101    时间: 2018-9-1 08:22
标题: Arduino亮度檢查報警程序
#include <Wire.h> //IIC库
#include <math.h>
int BH1750address = 0x23;//芯片地址为16位23
byte buff[2];
void setup()
{
  Wire.begin();
  Serial.begin(9600);
  pinMode(13,OUTPUT);
}
void loop()
{
int i;
uint16_t val=0;
BH1750_Init(BH1750address);
delay(1000);
if(2==BH1750_Read(BH1750address))
  {
   val=((buff[0]<<8)|buff[1])/1.2;
   Serial.print(val,DEC);
   Serial.println("[lx]");
  if(val<900||val>1200)
    {
     digitalWrite(13,HIGH);
    }  
    else
    {
      digitalWrite(13,LOW);
  }

  }
delay(150);
}
int BH1750_Read(int address) //
{
  int i=0;
  Wire.beginTransmission(address);
  Wire.requestFrom(address, 2);
  while(Wire.available()) //
  {
    buff[i] = Wire.read();  // read one byte
    i++;
  }
  Wire.endTransmission();  
  return i;
}
void BH1750_Init(int address)
{
  Wire.beginTransmission(address);
  Wire.write(0x10);//1lx reolution 120ms
  Wire.endTransmission();
}

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作者: admin    时间: 2018-9-1 17:12
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