arduino数码管驱动

int a=7;//数字IO口7 连接数码管a段 int b=6;//数字IO口6 连接数码管b段 int c=5;// 数字IO口5 连接数码管c段 int d=11;// 数字IO口11 连接数码管d段 int e=10;// 数字IO口10 连接数码管e段 int f=8;//数字IO口8 连接数码管f段 int g=9;// 数字IO口9连接数码管g段 int dp=4;// 数字IO口4 连接数码管小数点段 void digital_1(void) //显示数字1 { unsigned char j; digitalWrite(c,HIGH);//点亮c段 digitalWrite(b,HIGH);//点亮b段 for(j=7;j<=11;j++)//7~11口相应段拉低：a,f,g,e,d digitalWrite(j,LOW); digitalWrite(dp,LOW);//小数点不点亮 } 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 digital_9(void) //显示数字9 { digitalWrite(a,HIGH); digitalWrite(b,HIGH); digitalWrite(c,HIGH); digitalWrite(d,HIGH); digitalWrite(e,LOW); digitalWrite(f,HIGH); digitalWrite(g,HIGH); digitalWrite(dp,HIGH); } void setup() { int i;//变量声明 for(i=4;i<=11;i++) pinMode(i,OUTPUT);//设置4-11为输出口 } void loop() { while(1) { 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9 delay(1000); //延时1s } }