Shift In - Shift Out

shiftin_out.ino

int latchPin = 8;     // Pin connected to ST_CP of 74HC595
int dataPin = 9;      // Pin connected to DS of 74HC595
int clockPin = 10;    // Pin connected to SH_CP of 74HC595

int sinPin = 5;      // Serial input pin from 74HC165
int sclkPin = 6;     // Clock pin to '165
int loadPin = 7;     // parallel load pin of '165 

void setup() {
  
  Serial.begin(9600);
  
  //set pins to input/output so you can control the shift registers
  
  pinMode(loadPin, OUTPUT);
  pinMode(sclkPin, OUTPUT);
  pinMode(sinPin, INPUT);
  
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  digitalWrite(sclkPin,HIGH);    // initialise the clock HIGH
}

void loop() {


while(1){

// Read incoming word from 74HC165

digitalWrite(loadPin, LOW);
digitalWrite(loadPin, HIGH);
int incoming = shiftIn(sinPin, sclkPin, MSBFIRST);  
digitalWrite(sclkPin,HIGH);
    

// and write it out to 74HC595

PORTB &= ~_BV(0);
shiftOut(dataPin, clockPin, MSBFIRST, incoming);  // shift out the bits:
PORTB |= _BV(0);

Serial.println(incoming);      // just some debug
        
        
//        delay(100);
  }
}