PRJ - Led595 2 Counter 2

2024-05-29

/* HC595 4位共阳级7段数码管

无延时刷新

*/

// int analogPin = A0; // potentiometer wiper (middle terminal) connected to 

int latchPin = 7;
int clockPin = 6;
int dataPin = 8; 

unsigned long previousMillis = 0; 
int interval = 10;    // 刷新间隔

int counter = 0;
// 数字的编码, 共阳级码表
unsigned char Dis_table[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0X80,0X90,0x00};	//LED状态显示的变量
// unsigned char Dis_buf[] = {0xF1,0xF2,0xF4,0xF8};  // 这个是多功能版的位选连线
unsigned char Dis_buf[] = {0xF8,0xF4,0xF2,0xF1};     // 与多功能版的位选连线是逆序排列
void setup ()
{
  Serial.begin(9600);  
  pinMode(latchPin,OUTPUT);
  pinMode(clockPin,OUTPUT);
  pinMode(dataPin,OUTPUT);   //让三个脚都是输出状态
}
void loop()
{
  counter++;
  // 转换成待显示的4个数字
  int temp = counter;
  int d[4]={0,0,0,0};
  for(int i=0; i<4; i++){
     int r = temp % 10;
     d[4-i-1] = r;
     temp = temp/10;   
    //  Serial.println(r);
  }  

unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {  
  print4digits(d[0], d[1], d[2], d[3]);
previousMillis =   currentMillis;
  }
  // print4digits(1,2,3,4); 
  Serial.println(counter);
  // delay(200);

}

//打印1个4位数


//打印4个数字
void print4digits(int a, int b, int c, int d)
{
  print1digit(0, a);
  print1digit(1, b);
  print1digit(2, c);
  print1digit(3, d);  
}

// 在指定位上打字一个数字
void print1digit(int chan, int number)
{
  digitalWrite(latchPin,LOW); //将ST_CP口上面加低电平让芯片准备好接收数据
  shiftOut(dataPin,clockPin,MSBFIRST,Dis_table[number]); //发送显示码 0-3
  shiftOut(dataPin,clockPin,MSBFIRST,Dis_buf[chan] );  //发送通值		
  digitalWrite(latchPin,HIGH); //将ST_CP这个针脚恢复到高电平
  // delay(1);				//延时5ms 
}