三个引脚控制16路流水灯

只看该作者 · 2024-12-19 20:39

老规矩，我们先来看个效果

我们先用单片机按照之前的例子分解，来实现我们想要的结果。
首先，我们让16个LED灯交叉亮起来

代码部分：

int STCP_Pin = 4;
int SHCP_Pin = 6;
int DS_Pin = 5;

void setup ()
{
  pinMode(STCP_Pin,OUTPUT);
  pinMode(SHCP_Pin,OUTPUT);
  pinMode(DS_Pin,OUTPUT);
}

// 我们先让16个灯交叉亮
void loop()
{
  while(1)
  {
digitalWrite(STCP_Pin, LOW);

// 1
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, LOW);
digitalWrite(SHCP_Pin, HIGH);
// 2
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, HIGH);
digitalWrite(SHCP_Pin, HIGH);
// 3
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, LOW);
digitalWrite(SHCP_Pin, HIGH);
// 4
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, HIGH);
digitalWrite(SHCP_Pin, HIGH);
// 5
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, LOW);
digitalWrite(SHCP_Pin, HIGH);
// 6
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, HIGH);
digitalWrite(SHCP_Pin, HIGH);

// 7
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, LOW);
digitalWrite(SHCP_Pin, HIGH);
// 8
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, HIGH);
digitalWrite(SHCP_Pin, HIGH);
// 9
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, LOW);
digitalWrite(SHCP_Pin, HIGH);
// 10
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, HIGH);
digitalWrite(SHCP_Pin, HIGH);
// 11
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, LOW);
digitalWrite(SHCP_Pin, HIGH);
// 12
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, HIGH);
digitalWrite(SHCP_Pin, HIGH);

// 13
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, LOW);
digitalWrite(SHCP_Pin, HIGH);
// 14
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, HIGH);
digitalWrite(SHCP_Pin, HIGH);
// 15
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, LOW);
digitalWrite(SHCP_Pin, HIGH);
// 16
digitalWrite(SHCP_Pin, LOW);
digitalWrite(DS_Pin, HIGH);
digitalWrite(SHCP_Pin, HIGH);

digitalWrite(STCP_Pin, HIGH);
  }
}
运行效果

然后我们再把代码简化一下，使其看起来更简洁，实用

int STCP_Pin = 4;
int SHCP_Pin = 6;
int DS_Pin = 5;

void setup ()
{
  pinMode(STCP_Pin,OUTPUT);
  pinMode(SHCP_Pin,OUTPUT);
  pinMode(DS_Pin,OUTPUT);

  digitalWrite(STCP_Pin, LOW);
}

void loop()
{
  unsigned char LED_Data;

  while(1)
  {

   LED_Data = 0xAA;
   // 第一个8位
   digitalWrite(STCP_Pin, LOW);
   for(int i=0; i<8; i++)
   {
      if(LED_Data&0x80){ digitalWrite(DS_Pin, HIGH);}
      else          { digitalWrite(DS_Pin, LOW); }

      digitalWrite(SHCP_Pin, LOW);
      digitalWrite(SHCP_Pin, HIGH);
      LED_Data <<=1;
   }

   // 第二个8位
   LED_Data = 0xAA;
   for(int i=0; i<8; i++)
   {
      if(LED_Data&0x80){ digitalWrite(DS_Pin, HIGH);}
      else          { digitalWrite(DS_Pin, LOW); }

      digitalWrite(SHCP_Pin, LOW);
      digitalWrite(SHCP_Pin, HIGH);
      LED_Data <<=1;
   }

   digitalWrite(STCP_Pin, HIGH);

delay(1000);
  }
}
我们稍微改变下，让LED灯按照我们的意思工作，封装一下函数，然后让中间四个灯亮起来

int STCP_Pin = 4;
int SHCP_Pin = 6;
int DS_Pin = 5;

void HC595_Write(unsigned char data1, unsigned char data2);

void setup ()
{
  pinMode(STCP_Pin,OUTPUT);
  pinMode(SHCP_Pin,OUTPUT);
  pinMode(DS_Pin,OUTPUT);

}

void loop()
{
  unsigned char LED_Data1 = 0x03;
  unsigned char LED_Data2 = 0xC0;
  while(1)
  {
HC595_Write(LED_Data1, LED_Data2);
delay(1000);
  }
}

void HC595_Write(unsigned char data1, unsigned char data2)
{
   // 第一个8位
   digitalWrite(STCP_Pin, LOW);
   for(int i=0; i<8; i++)
   {
      if(data1&0x80){ digitalWrite(DS_Pin, HIGH);}
      else          { digitalWrite(DS_Pin, LOW); }

      digitalWrite(SHCP_Pin, LOW);
      digitalWrite(SHCP_Pin, HIGH);
      data1 <<=1;
   }

   // 第二个8位
   for(int i=0; i<8; i++)
   {
      if(data2&0x80){ digitalWrite(DS_Pin, HIGH);}
      else          { digitalWrite(DS_Pin, LOW); }

      digitalWrite(SHCP_Pin, LOW);
      digitalWrite(SHCP_Pin, HIGH);
      data2 <<=1;
   }

   digitalWrite(STCP_Pin, HIGH);
}

中间四个LED灯亮的效果

然后我们连贯起来搞个流水的灯玩玩

int STCP_Pin = 4;
int SHCP_Pin = 6;
int DS_Pin = 5;

unsigned char LED_Data1[8] = { 0x01, 0x02, 0x04, 0x08,
                           0x10, 0x20, 0x40, 0x80};
unsigned char LED_Data2[8] = { 0x01, 0x02, 0x04, 0x08,
                           0x10, 0x20, 0x40, 0x80};

void HC595_Write(unsigned char data1, unsigned char data2);

void setup ()
{
  pinMode(STCP_Pin,OUTPUT);
  pinMode(SHCP_Pin,OUTPUT);
  pinMode(DS_Pin,OUTPUT);

}

void loop()
{

  while(1)
  {
for(int i=0; i<8; i++)
{
      HC595_Write(0x00, LED_Data1[i]);
      delay(1000);
}

for(int i=0; i<8; i++)
{
      HC595_Write( LED_Data2[i], 0x00);
      delay(1000);
}
  }
}

void HC595_Write(unsigned char data1, unsigned char data2)
{
   // 第一个8位
   digitalWrite(STCP_Pin, LOW);
   for(int i=0; i<8; i++)
   {
      if(data1&0x80){ digitalWrite(DS_Pin, HIGH);}
      else          { digitalWrite(DS_Pin, LOW); }

      digitalWrite(SHCP_Pin, LOW);
      digitalWrite(SHCP_Pin, HIGH);
      data1 <<=1;
   }

   // 第二个8位
   for(int i=0; i<8; i++)
   {
      if(data2&0x80){ digitalWrite(DS_Pin, HIGH);}
      else          { digitalWrite(DS_Pin, LOW); }

      digitalWrite(SHCP_Pin, LOW);
      digitalWrite(SHCP_Pin, HIGH);
      data2 <<=1;
   }

   digitalWrite(STCP_Pin, HIGH);
}
最终的流水灯实验效果

当然arduino本身自带了移位函数，同样可以达到效果

int STCP_Pin = 4;
int SHCP_Pin = 6;
int DS_Pin = 5;

unsigned char LED_Data1[8] = { 0x01, 0x02, 0x04, 0x08,
                           0x10, 0x20, 0x40, 0x80};
unsigned char LED_Data2[8] = { 0x01, 0x02, 0x04, 0x08,
                           0x10, 0x20, 0x40, 0x80};

void setup ()
{
  pinMode(STCP_Pin,OUTPUT);
  pinMode(SHCP_Pin,OUTPUT);
  pinMode(DS_Pin,OUTPUT);
}
void loop()
{
  for(int a=0; a<8; a++)
  {
digitalWrite(STCP_Pin,LOW);
shiftOut(DS_Pin,SHCP_Pin,MSBFIRST,LED_Data1[a]);
shiftOut(DS_Pin,SHCP_Pin,MSBFIRST,0x00);
digitalWrite(STCP_Pin,HIGH);
delay(500);
  }

  for(int a=0; a<8; a++)
  {
digitalWrite(STCP_Pin,LOW);
shiftOut(DS_Pin,SHCP_Pin,MSBFIRST,0x00);
shiftOut(DS_Pin,SHCP_Pin,MSBFIRST,LED_Data2[a]);
digitalWrite(STCP_Pin,HIGH);
delay(500);
  }
}
流水的延时500ms的效果