/*
#######################################################
||                                                   ||
||Title: Binary Counter with a 74HC164 Shift Register||
||                   Name: GC1CEO                    ||
||                  Date: 9/17/2024                  ||
||                   Attribution:                    ||
||        Based on shiftOutCode, Hello World         ||
||      by Carlyn Maw,Tom Igoe, David A. Mellis      ||
||       Date: 10/25/2006 Modified: 3/23/2010        ||
||                                                   ||
||                   Description:                    ||
||                                                   ||
||      This counts from 0 to 255 on a 74HC164       ||
||     Shift Register, outputting a binary code      ||
||                 on its 8 outputs.                 ||
||                                                   ||
||                                                   ||
#######################################################
*/



//Pin connected to either DSA (Data, Serial A) or DSB (Data, Serial B) of the 74HC164 (which ever isn't used by dataPin) which enables data input
int latchPin = 8;
//Pin connected to CP (Clock Pulse) of 74HC164
int clockPin = 7;
////Pin connected to either DSA (Data Serial A) or DSB (Data Serial B) of the 74HC164 (which ever isn't used by latchPin)
int dataPin = 9;
////Pin connected to inverted MR (Master Reset) of 74HC164
int resetPin = 6;

// delay between each number (in ms)
int delayTime = 1000;

void setup() {
Serial.begin(115200);

//set pins to output so you can control the shift register and setting button and pot pins to INPUT
pinMode(latchPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(dataPin, OUTPUT);
pinMode(resetPin, OUTPUT);

// Setting reset to HIGH to stop reset and setting latch/input enable to HIGH to always enable input
digitalWrite(resetPin, HIGH);
digitalWrite(latchPin, HIGH);

// Cleaning up serial monitor and announcing program has initalized and going to loop
for(int a = 0; a < 25; a++){
  Serial.println();
}
}
void loop() {
// count from 0 to 255 and display the number
// on the LEDs
Serial.print("Counting from 0 to 255!");
Serial.println();

// for loop to count from 0 to 255
for (int numberToDisplay = 0; numberToDisplay < 255; numberToDisplay++) {

  

// shift out the bits:
shiftOut(dataPin, clockPin, MSBFIRST, numberToDisplay);

//print the number to serial

Serial.print(String(numberToDisplay) + " ");

// new line every 5 counts (and after the initial 0)
if(numberToDisplay % 5 == 0) { Serial.println("");}

// pause before next value
delay(delayTime);
}

// Announcement that count has finished and is now restarting

Serial.print("Count finished! Restarting!");
Serial.println();
}