4位数码管驱动

#define SEG_A 2 //Arduino Pin2--->SegLed Pin11 #define SEG_B 3 //Arduino Pin3--->SegLed Pin7 #define SEG_C 4 //Arduino Pin4--->SegLed Pin4 #define SEG_D 5 //Arduino Pin5--->SegLed Pin2 #define SEG_E 6 //Arduino Pin6--->SegLed Pin1 #define SEG_F 7 //Arduino Pin7--->SegLed Pin10 #define SEG_G 8 //Arduino Pin8--->SegLed Pin5 #define SEG_H 9 //Arduino Pin9--->SegLed Pin3 #define COM1 10 //Arduino Pin10--->SegLed Pin12 #define COM2 11 //Arduino Pin11--->SegLed Pin9 #define COM3 12 //Arduino Pin12--->SegLed Pin8 #define COM4 13 //Arduino Pin13--->SegLed Pin6 unsigned char table[10][8] = { {0, 0, 1, 1, 1, 1, 1, 1}, //0 {0, 0, 0, 0, 0, 1, 1, 0}, //1 {0, 1, 0, 1, 1, 0, 1, 1}, //2 {0, 1, 0, 0, 1, 1, 1, 1}, //3 {0, 1, 1, 0, 0, 1, 1, 0}, //4 {0, 1, 1, 0, 1, 1, 0, 1}, //5 {0, 1, 1, 1, 1, 1, 0, 1}, //6 {0, 0, 0, 0, 0, 1, 1, 1}, //7 {0, 1, 1, 1, 1, 1, 1, 1}, //8 {0, 1, 1, 0, 1, 1, 1, 1} //9 }; void setup() { pinMode(SEG_A,OUTPUT); //设置为输出引脚 pinMode(SEG_B,OUTPUT); pinMode(SEG_C,OUTPUT); pinMode(SEG_D,OUTPUT); pinMode(SEG_E,OUTPUT); pinMode(SEG_F,OUTPUT); pinMode(SEG_G,OUTPUT); pinMode(SEG_H,OUTPUT); pinMode(COM1,OUTPUT); pinMode(COM2,OUTPUT); pinMode(COM3,OUTPUT); pinMode(COM4,OUTPUT); } void loop() { Display(1,1); //第1位显示1 delay(500); Display(2,2); //第2位显示2 delay(500); Display(3,3); //第3位显示3 delay(500); Display(4,4); //第4位显示4 delay(500); } void Display(unsigned char com,unsigned char num) { digitalWrite(SEG_A,LOW); //去除余晖 digitalWrite(SEG_B,LOW); digitalWrite(SEG_C,LOW); digitalWrite(SEG_D,LOW); digitalWrite(SEG_E,LOW); digitalWrite(SEG_F,LOW); digitalWrite(SEG_G,LOW); digitalWrite(SEG_H,LOW); switch(com) //选通位选 { case 1: digitalWrite(COM1,LOW); //选择位1 digitalWrite(COM2,HIGH); digitalWrite(COM3,HIGH); digitalWrite(COM4,HIGH); break; case 2: digitalWrite(COM1,HIGH); digitalWrite(COM2,LOW); //选择位2 digitalWrite(COM3,HIGH); digitalWrite(COM4,HIGH); break; case 3: digitalWrite(COM1,HIGH); digitalWrite(COM2,HIGH); digitalWrite(COM3,LOW); //选择位3 digitalWrite(COM4,HIGH); break; case 4: digitalWrite(COM1,HIGH); digitalWrite(COM2,HIGH); digitalWrite(COM3,HIGH); digitalWrite(COM4,LOW); //选择位4 break; default:break; } digitalWrite(SEG_A,table[num][7]); //a查询码值表 digitalWrite(SEG_B,table[num][6]); digitalWrite(SEG_C,table[num][5]); digitalWrite(SEG_D,table[num][4]); digitalWrite(SEG_E,table[num][3]); digitalWrite(SEG_F,table[num][2]); digitalWrite(SEG_G,table[num][1]); digitalWrite(SEG_H,table[num][0]); }