Arduino 空循环

Question

为了class，我开发了如下代码。另一方面，我的老师要我浓缩它。如果有人有任何建议，我将不胜感激。谢谢

    void setup()
{
  DDRD = 0b11111111;
  DDRB = 0b00000001;
}

void loop()
 
{
  PORTD = 0b00000001;
  PORTB = 0b00000000;
  delay(t);
  PORTD = 0b00000010;
  PORTB = 0b00000000;
  delay(t);
  PORTD = 0b00000100;
  PORTB = 0b00000000;
  delay(t);
  PORTD = 0b00001000;
  PORTB = 0b00000000;
  delay(t);
  PORTD = 0b00010000;
  PORTB = 0b00000000;
  delay(t);
  PORTD = 0b00100000;
  PORTB = 0b00000000;
  delay(t);
  PORTD = 0b01000000;
  PORTB = 0b00000000;
  delay(t);
  PORTD = 0b10000000;
  PORTB = 0b00000000;
  delay(;
  PORTD = 0b00000000;
  PORTB = 0b00000001;
  delay(t);
  
}

Answer 1

这应该遍历您要将 PORTD 设置为的值。它为每个循环移动一次“1”位，因为 bitval 只能容纳一个字节（8 位），第八次移位将使 bitval 为零，结束循环。

void loop()
{
    for (byte bitval = 1; bitval != 0; bitval <<= 1)
    {
        PORTD = bitval;
        PORTB = 0;
        delay(t);
    }
    PORTD = 0;
    PORTB = 1;
    delay(t);
}

Arduino 空循环

Arduino Void Loop

arduino

void