Arduino Examples

2811灯带

https://zhuanlan.zhihu.com/p/657979970

CAS Modbus Scanner

单车测速(//TODO 有干扰)

int pin = 9;    
unsigned long time = 0,old_time = 0;    
unsigned long time_delay = 0;   
unsigned long count = 0;    
int x = 0 ;   
void code()   
{   
  if((millis()-time_delay)>10 && (millis()-time_delay)<1000)    
  {   
  //count = millis()-time_delay;    
  count ++ ;    
  time_delay = millis();    
  }else{    
  //count=0;    
  time_delay = millis();    
  }   
  delay(10);    
}   
void setup() {    
  // put your setup code here, to run once:   
Serial.begin(115200);   
pinMode(2,INPUT_PULLUP);    
//pinMode(2,INPUT);   
int fff = 2;  // 可以是 1, 2, 3, 4, 5    
TCCR1B = TCCR1B & 0xF8 | fff;     
attachInterrupt(0,code,CHANGE);   
}   
void loop() {    
  // put your main code here, to run repeatedly:    
  time = millis();    
  if(abs(time-old_time) >= 1000)    
  {      
   detachInterrupt(0);     
   if(count != 0)   
   {    
   //x = (float)1000/count;   
   x = count ;    
   }    
   else   
   {    
   x = 0 ;    
   }    
   Serial.println(x);   
   x = map(x,0,10,0,255);   
   if ( x >= 255)   
   x = 255 ;    
   Serial.println(x);     
   analogWrite(pin,x);      
   //delay(500);    
   count = 0;   
   attachInterrupt(0,code,CHANGE);    
   old_time = millis();     
  }   
}