arduino按钮使用的两个小实验

一：按钮控制一个灯                                                                                                                                                                                                  

控制要求：按钮控制灯

实物连接图：

控制代码：

//智慧自动化2018.6.14

int key=;//设置控制按键的数字IO脚

void setup()

{

pinMode(key,OUTPUT);//设置数字IO引脚为输出模式

}

void loop()

{

int i;//定义发量 while(1)

  {

  i=analogRead();//读取模拟0口电压值

  if(i>)//如果电压值大于1000

  digitalWrite(key,HIGH);//设置第七引脚为高电平，点亮led灯

  else digitalWrite(key,LOW);//设置第七引脚为低电平，熄灭led灯

  }

}

二：按钮生产随机数

控制要求：随机数生成

实物连接图：

控制代码：

//智慧自动化2018.6.14

int a=;

int b=;

int c=;

int d=;

int e=;

int f=;

int g=;

int dp=;

//显示数字1

void digital_1(void)

{

  unsigned char j;

  digitalWrite(c,HIGH);//给数字接口5 引脚高电平，点亮c 段

  digitalWrite(b,HIGH);//点亮b 段

  for(j=;j<=;j++)//熄灭其余段

  digitalWrite(j,LOW);

  digitalWrite(dp,LOW);//熄灭小数点DP 段

}

//显示数字2

void digital_2(void)

{

  unsigned char j;

  digitalWrite(b,HIGH);

  digitalWrite(a,HIGH);

  for(j=;j<=;j++)

  digitalWrite(j,HIGH);

  digitalWrite(dp,LOW);

  digitalWrite(c,LOW);

  digitalWrite(f,LOW);

}

//显示数字3

void digital_3(void)

{

  digitalWrite(g,HIGH);

  digitalWrite(a,HIGH);

  digitalWrite(b,HIGH);

  digitalWrite(c,HIGH);

  digitalWrite(d,HIGH);

  digitalWrite(dp,LOW);

  digitalWrite(f,LOW);

  digitalWrite(e,LOW);

}

//显示数字4

void digital_4(void)

{

  digitalWrite(c,HIGH);

  digitalWrite(b,HIGH);

  digitalWrite(f,HIGH);

  digitalWrite(g,HIGH);

  digitalWrite(dp,LOW);

  digitalWrite(a,LOW);

  digitalWrite(e,LOW);

  digitalWrite(d,LOW);

}

//显示数字5

void digital_5(void)

{

  unsigned char j;

  digitalWrite(a,HIGH);

  digitalWrite(b, LOW);

  digitalWrite(c,HIGH);

  digitalWrite(d,HIGH);

  digitalWrite(e, LOW);

  digitalWrite(f,HIGH);

  digitalWrite(g,HIGH);

  digitalWrite(dp,LOW);

}

//显示数字6

void digital_6(void)

{

  unsigned char j;

  for(j=;j<=;j++)

  digitalWrite(j,HIGH);

  digitalWrite(c,HIGH);

  digitalWrite(dp,LOW);

  digitalWrite(b,LOW);

}

//显示数字7

void digital_7(void)

{

  unsigned char j;

  for(j=;j<=;j++)

  digitalWrite(j,HIGH);

  digitalWrite(dp,LOW);

  for(j=;j<=;j++)

  digitalWrite(j,LOW);

}

//显示数字8

void digital_8(void)

{

  unsigned char j;

  for(j=;j<=;j++)

  digitalWrite(j,HIGH);

  digitalWrite(dp,LOW);

}

void setup()

{

  int i;

  for(i=;i<=;i++)

  {

    pinMode(i,OUTPUT);//设置4~11口味输出模式

  }

}

void loop()

{

  while()

  {

    digital_1();//显示数字1

    while(analogRead()>);//如果读到模拟0口的值为0则说明有按键按下

    delay();//延时200ms

    digital_2();

    while(analogRead()>);

    delay();

    digital_3();

    while(analogRead()>);

    delay();

    digital_4();

    while(analogRead()>);

    delay();

    digital_5();

    while(analogRead()>);

    delay();

    digital_6();

    while(analogRead()>);

    delay();

    digital_7();

    while(analogRead()>);

    delay();

    digital_8();

    while(analogRead()>);

    delay();

  }

}