74hc959

[[http://www.nxp.com/documents/data_sheet/74HC_HCT595.pdf|datasheet]]
[[https://www.arduino.cc/en/Tutorial/ShiftOut|example code and schematics by Arduino]]
[[https://www.youtube.com/watch?v=nXl4fb_LbcI|movie about reading buttons with the 74HC959]]
https://www.youtube.com/watch?v=6fVbJbNPrEU

My example on 123d.circuits.io

https://123d.circuits.io/circuits/1166640-74hc595-shift-register-exercise (:74hc959-shift-register.png?direct&700|)

My second example on 123d.circuits.io (with 2x 74hc595)

(::74hc959-2x-shift-register.png?direct&700|)

Binary counter

int clockPin = 10; //SH_CP (SHift register Clock Pulse) int latchPin = 11; //ST_CP (STorage Clock Pulse) int dataPin = 12; //DS int address = 0; byte data = 0;


void setup() {
pinMode(latchPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(dataPin, OUTPUT);
}
void loop() {
digitalWrite(latchPin, LOW);   //ground latchPin and hold low for as long as you are transmitting
shiftOut(dataPin, clockPin, MSBFIRST, 0); //flags enzo
shiftOut(dataPin, clockPin, MSBFIRST, address >> 8); //address HIGH
shiftOut(dataPin, clockPin, MSBFIRST, address); //address LOW
shiftOut(dataPin, clockPin, MSBFIRST, data); // data
digitalWrite(latchPin, HIGH);
delay(50);
data++;
address++;
}

# read from 74HC166 and write to 74HC959
<code c>
const byte CLOCK = 8;         // CP   on 74hc166 and SHCP on 74hc959
const byte SWITCH_SELECT = 9; // !PE  on 74hc166
const byte SWITCH_DATA = 10;  // Q7   on 74hc166
const byte LED_SELECT = 11;   // STCP on 74hc959
const byte LED_DATA = 12;     // DS   on 74hc959

void setup() {
  pinMode(CLOCK, OUTPUT);
  pinMode(SWITCH_SELECT, OUTPUT);
  pinMode(SWITCH_DATA, INPUT);
  pinMode(LED_SELECT, OUTPUT);
  pinMode(LED_DATA, OUTPUT);  
}

void loop() {
  //read switches
  digitalWrite(SWITCH_SELECT, LOW);
  digitalWrite(CLOCK, HIGH);
  digitalWrite(SWITCH_SELECT, HIGH);
  byte al = shiftIn(SWITCH_DATA, CLOCK, MSBFIRST);
  byte ah = shiftIn(SWITCH_DATA, CLOCK, MSBFIRST);

  //write leds
  digitalWrite(LED_SELECT, LOW);
  shiftOut(LED_DATA, CLOCK, MSBFIRST, 0);  //flags
  shiftOut(LED_DATA, CLOCK, MSBFIRST, ah); //address high
  shiftOut(LED_DATA, CLOCK, MSBFIRST, al); //address low
  shiftOut(LED_DATA, CLOCK, MSBFIRST, 0);  //data
  digitalWrite(LED_SELECT, HIGH);
}