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- // Name : Collin McDade and Britney Beatey
- // Date : 6/22/17
- // Version : 1.0
- //Pin connected to ST_CP of 74HC595
- int latchPin = 9;
- //Pin connected to SH_CP of 74HC595
- int clockPin = 10;
- ////Pin connected to DS of 74HC595
- int dataPin = 8;
- //holders for infromation you're going to pass to shifting function
- byte dataRED;
- byte dataGREEN;
- byte dataArrayRED[10];
- byte dataArrayGREEN[10];
- void setup() {
- //set pins to output because they are addressed in the main loop
- pinMode(latchPin, OUTPUT);
- Serial.begin(9600);
- //Arduino doesn't seem to have a way to write binary straight into the code
- //so these values are in HEX. Decimal would have been fine, too.
- dataArrayRED[0] = 0xFF; //11111111
- dataArrayRED[1] = 0xFE; //11111110
- dataArrayRED[2] = 0xFC; //11111100
- dataArrayRED[3] = 0xF8; //11111000
- dataArrayRED[4] = 0xF0; //11110000
- dataArrayRED[5] = 0xE0; //11100000
- dataArrayRED[6] = 0xC0; //11000000
- dataArrayRED[7] = 0x80; //10000000
- dataArrayRED[8] = 0x00; //00000000
- dataArrayRED[9] = 0xE0; //11100000
- //Arduino doesn't seem to have a way to write binary straight into the code
- //so these values are in HEX. Decimal would have been fine, too.
- dataArrayGREEN[0] = 0xFF; //11111111
- dataArrayGREEN[1] = 0x7F; //01111111
- dataArrayGREEN[2] = 0x3F; //00111111
- dataArrayGREEN[3] = 0x1F; //00011111
- dataArrayGREEN[4] = 0x0F; //00001111
- dataArrayGREEN[5] = 0x07; //00000111
- dataArrayGREEN[6] = 0x03; //00000011
- dataArrayGREEN[7] = 0x01; //00000001
- dataArrayGREEN[8] = 0x00; //00000000
- dataArrayGREEN[9] = 0x07; //00000111
- //function that blinks all the LEDs
- //gets passed the number of blinks and the pause time
- blinkAll_2Bytes(2,500);
- }
- void loop() {
- for (int j = 0; j < 10; j++) {
- //load the light sequence you want from array
- dataRED = dataArrayRED[j];
- dataGREEN = dataArrayGREEN[j];
- //ground latchPin and hold low for as long as you are transmitting
- digitalWrite(latchPin, 0);
- //move 'em out
- shiftOut(dataPin, clockPin, dataGREEN);
- shiftOut(dataPin, clockPin, dataRED);
- //return the latch pin high to signal chip that it
- //no longer needs to listen for information
- digitalWrite(latchPin, 1);
- delay(300);
- }
- }
- // the heart of the program
- void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {
- // This shifts 8 bits out MSB first,
- //on the rising edge of the clock,
- //clock idles low
- //internal function setup
- int i=0;
- int pinState;
- pinMode(myClockPin, OUTPUT);
- pinMode(myDataPin, OUTPUT);
- //clear everything out just in case to
- //prepare shift register for bit shifting
- digitalWrite(myDataPin, 0);
- digitalWrite(myClockPin, 0);
- //for each bit in the byte myDataOut�
- //NOTICE THAT WE ARE COUNTING DOWN in our for loop
- //This means that %00000001 or "1" will go through such
- //that it will be pin Q0 that lights.
- for (i=7; i>=0; i--) {
- digitalWrite(myClockPin, 0);
- //if the value passed to myDataOut and a bitmask result
- // true then... so if we are at i=6 and our value is
- // %11010100 it would the code compares it to %01000000
- // and proceeds to set pinState to 1.
- if ( myDataOut & (1<<i) ) {
- pinState= 1;
- }
- else {
- pinState= 0;
- }
- //Sets the pin to HIGH or LOW depending on pinState
- digitalWrite(myDataPin, pinState);
- //register shifts bits on upstroke of clock pin
- digitalWrite(myClockPin, 1);
- //zero the data pin after shift to prevent bleed through
- digitalWrite(myDataPin, 0);
- }
- //stop shifting
- digitalWrite(myClockPin, 0);
- }
- //blinks the whole register based on the number of times you want to
- //blink "n" and the pause between them "d"
- //starts with a moment of darkness to make sure the first blink
- //has its full visual effect.
- void blinkAll_2Bytes(int n, int d) {
- digitalWrite(latchPin, 0);
- shiftOut(dataPin, clockPin, 0);
- shiftOut(dataPin, clockPin, 0);
- digitalWrite(latchPin, 1);
- delay(200);
- for (int x = 0; x < n; x++) {
- digitalWrite(latchPin, 0);
- shiftOut(dataPin, clockPin, 255);
- shiftOut(dataPin, clockPin, 255);
- digitalWrite(latchPin, 1);
- delay(d);
- digitalWrite(latchPin, 0);
- shiftOut(dataPin, clockPin, 0);
- shiftOut(dataPin, clockPin, 0);
- digitalWrite(latchPin, 1);
- delay(d);
- }
- }
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