【外设】74HC595移位寄存器

jiayouxiaoniu

一、管脚图：


二、真值表：


三、电路图




放大的图：

jiayouxiaoniu

附上代码：

/*define pin*/
#define SCLR_PIN 2
#define SI_PIN 3
#define SCK_PIN 4
#define RCK_PIN 5
#define OE_PIN 6

/*define the map of value 0-9*/
#define NUM_VAL 11
int val[NUM_VAL]= {
  0xDE,//0
  0x06,//1
  0xEC,//2
  0xAE,//3
  0x36,//4
  0xBA,//5
  0xFA,//6
  0x0E,//7
  0xFE,//8
  0xBE,//9
  0x01,//dot
  };

/*define the function of display val*/
void disVal(int val);

void setup() {
  // put your setup code here, to run once:
  pinMode(SCLR_PIN, OUTPUT);
  pinMode(SI_PIN, OUTPUT);
  pinMode(SCK_PIN, OUTPUT);
  pinMode(RCK_PIN, OUTPUT);
  pinMode(OE_PIN, OUTPUT);

  return;
}

void loop() {
  digitalWrite(OE_PIN, LOW);

  // put your main code here, to run repeatedly:
  for(int i = 0; i < NUM_VAL; i++ )
  {
      disVal(val[i]);
      //disVal(0xDE);
      delay(1000);
  }

  return;
}

void disVal(int val)
{
  //set RCK to Low
  digitalWrite(RCK_PIN, LOW);

  //clear SHIFT Story
  digitalWrite(SCLR_PIN, LOW);
  digitalWrite(SCLR_PIN, HIGH);

  //set the val to SHIFT Story
  shiftOut(SI_PIN, SCK_PIN, MSBFIRST, val);

  //set RCK to HIGH
  digitalWrite(RCK_PIN, HIGH);
  return;
}