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====== Digital ======

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//__About this Article__//
  * **Author**: aaron --- aaron@cubietech.com --- 2014/02/27 22:33
  * **Copyrights**: [[http://creativecommons.org/licenses/by-sa/3.0/|CC Attribution-Share Alike 3.0 Unported]]
  * **Contributors**: [[http://cubieboard.org/|Cubieboard Community]] : ...
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===== Abstract =====

{{:tutorials:arduino:dsc_0735.jpg|400}}
{{:tutorials:arduino:dsc_0737.jpg|400}}
===== Headline =====

==== Souece Code====
<code>
int a=7;//定义数字接口7 连接a 段数码管
int b=6;// 定义数字接口6 连接b 段数码管
int c=5;// 定义数字接口5 连接c 段数码管
int d=11;// 定义数字接口11 连接d 段数码管
int e=10;// 定义数字接口10 连接e 段数码管
int f=8;// 定义数字接口8 连接f 段数码管
int g=9;// 定义数字接口9 连接g 段数码管
int dp=4;// 定义数字接口4 连接dp 段数码管
void digital_1(void) //显示数字1
{
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=7;j<=11;j++)//熄灭其余段
digitalWrite(j,LOW);
digitalWrite(dp,LOW);//熄灭小数点DP 段
}
void digital_2(void) //显示数字2
{
unsigned char j;
digitalWrite(b,HIGH);
digitalWrite(a,HIGH);
for(j=9;j<=11;j++)
digitalWrite(j,HIGH);
digitalWrite(dp,LOW);
digitalWrite(c,LOW);
digitalWrite(f,LOW);
}
void digital_3(void) //显示数字3
{
unsigned char j;
digitalWrite(g,HIGH);
digitalWrite(d,HIGH);
for(j=5;j<=7;j++)
digitalWrite(j,HIGH);
digitalWrite(dp,LOW);
digitalWrite(f,LOW);
digitalWrite(e,LOW);
}
void digital_4(void) //显示数字4
{
digitalWrite(c,HIGH);
digitalWrite(b,HIGH);
digitalWrite(f,HIGH);
digitalWrite(g,HIGH);
digitalWrite(dp,LOW);
digitalWrite(a,LOW);
digitalWrite(e,LOW);
digitalWrite(d,LOW);
}
void digital_5(void) //显示数字5
{
unsigned char j;
for(j=7;j<=9;j++)
digitalWrite(j,HIGH);
digitalWrite(c,HIGH);
digitalWrite(d,HIGH);
digitalWrite(dp,LOW);
digitalWrite(b,LOW);
digitalWrite(e,LOW);
}
void digital_6(void) //显示数字6
{
unsigned char j;
for(j=7;j<=11;j++)
digitalWrite(j,HIGH);
digitalWrite(c,HIGH);
digitalWrite(dp,LOW);
digitalWrite(b,LOW);
}
void digital_7(void) //显示数字7
{
unsigned char j;
for(j=5;j<=7;j++)
digitalWrite(j,HIGH);
digitalWrite(dp,LOW);
for(j=8;j<=11;j++)
digitalWrite(j,LOW);
}
void digital_8(void) //显示数字8
{
unsigned char j;
for(j=5;j<=11;j++)
digitalWrite(j,HIGH);
digitalWrite(dp,LOW);
}
void setup()
{
int i;//定义变量
for(i=4;i<=11;i++)
pinMode(i,OUTPUT);//设置4～11 引脚为输出模式
}
void loop()
{
while(1)
{
digital_1();//显示数字1
delay(2000);//延时2s
digital_2();//显示数字2
delay(1000); //延时1s
digital_3();//显示数字3
delay(1000); //延时1s
digital_4();//显示数字4
delay(1000); //延时1s
digital_5();//显示数字5
delay(1000); //延时1s
digital_6();//显示数字6
delay(1000); //延时1s
digital_7();//显示数字7
delay(1000); //延时1s
digital_8();//显示数字8
delay(1000); //延时1s
}
}
</code>

===== Headline =====

=== See Also ===

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{{tag>Cubieboard Cubietruck}}
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