Reference for Wiring version 0024+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

Name

shiftOut()

Examples
int data = 0;    // Wiring pin 0 for data 
int clock = 1;   // Wiring pin 1 for clock 
int strobe = 2;  // Wiring pin 2 for the strobe (latch) 
byte counter = 0;

void setup() {
  pinMode(data OUTPUT);
  pinMode(clock, OUTPUT);
  pinMode(strobe, OUTPUT);
}

void loop() { 
  digitalWrite(strobe, LOW);
  shiftOut(data, clock, LSBFIRST, counter);  // writes counter to the register  
  digitalWrite(strobe, HIGH); 
  delay(1000);
  counter = counter + 1;
}
Description The shiftOut() method writes a byte of data one bit at a time. It can start from the most or the least significant bit of the byte (starts from leftmost or rightmost bit). This method is very useful to manage shift registers, which are devices that convert data from serial to parallel using one pin for receiving data, one for the clock, and one for the strobe (latch).
Syntax
shiftOut(dataPin,clockPin,bitOrder,data)
Parameters
dataPin int: the pin used to send out the data
clockPin int: the pin used as clock
bitOrder MSBFIRST or LSBFIRST: the bit order to use. MSBFIRST stands for most significant bit first (leftmost bit), LSBFIRST stands for less significant bit first (rightmost bit).
data byte: the byte to send out.
Returns none
Usage Application
Related MSBFIRST
LSBFIRST
Updated on November 01, 2009 11:24:57pm PST

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