3 Pins, 32 LEDs, 4 Shift Registers [74HC595]

1#include <HC595.h>
2
3const int chipCount = 2;  // Number of serialy  connected 74HC595 (8 maximum)
4const int latchPin = 4;  // Pin ST_CP (12) of the  74HC595
5const int clockPin = 3;  // Pin SH_CP (11) of the 74HC595
6const int  dataPin = 2;   // Pin DS (14) of the 74HC595
7
8//Constructor
9HC595 ledArray(chipCount,latchPin,clockPin,dataPin);
10
11int  delayMs = 30;
12int lastPin = ledArray.lastPin();
13
14void setup() {
15  ledArray.reset();
16}
17
18void  loop() {
19  for (int i = 0 ; i <= lastPin ; i++) {
20    ledArray.setPin(i, ON);
21    delay(delayMs);
22  }
23  for (int i = lastPin ; i >= 0 ; i--) {
24    ledArray.setPin(i,  OFF);
25    delay(delayMs);
26  }
27  for (int i = lastPin ; i >= 0 ; i--) {
28    ledArray.setPin(i, TOGGLE);
29    delay(delayMs);
30  }
31  for (int i =  0 ; i <= lastPin ; i++) {
32    ledArray.setPin(i, TOGGLE);
33    delay(delayMs);
34  }
35}
36