一：八段数码管的使用
控制要求：0-9的计时数据
实物连接图：
控制代码：
//智慧自动化2018.6.11int 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=10;// 定义数字接口10 连接d 段数码管int e=11;// 定义数字接口11 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_0(void) //显示数字5{ unsigned char j; digitalWrite(a,HIGH); digitalWrite(b,HIGH); digitalWrite(c,HIGH); digitalWrite(d,HIGH); digitalWrite(e,HIGH); digitalWrite(f,HIGH); digitalWrite(g,LOW); digitalWrite(dp,LOW);}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{ digitalWrite(g,HIGH); digitalWrite(a,HIGH); digitalWrite(b,HIGH); digitalWrite(c,HIGH); digitalWrite(d,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; digitalWrite(a,HIGH); digitalWrite(b, LOW); digitalWrite(c,HIGH); digitalWrite(d,HIGH); digitalWrite(e, LOW); digitalWrite(f,HIGH); digitalWrite(g,HIGH); digitalWrite(dp,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 digital_9(void) //显示数字5{ unsigned char j; digitalWrite(a,HIGH); digitalWrite(b,HIGH); digitalWrite(c,HIGH); digitalWrite(d,HIGH); digitalWrite(e, LOW); digitalWrite(f,HIGH); digitalWrite(g,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_0();//显示数字1 delay(1000);//延时1s digital_1();//显示数字1 delay(1000);//延时1s 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 digital_9();//显示数字8 delay(1000); //延时1s }}