/*
This is Arduino code for 74HC595 chip code 2/8: Single digit display
Build up to 8 digits Seven-Segment display using 74HC595 Shift Register 
Watch full video instruction on YouTube https://youtu.be/xhPXovgFhso
resource page and wiring diagram https://robojax.com/RTJ394
Written and explained by Ahmad Shamshiri on https://youtube.com/@robojax


*/
/*
file:  Lesson_74HC595_1_SevenSegment
This is part of the code to learn how to run multiple seven-segment displays using
74HC595 shift register IC.

March 16, 2024

*/
const int CLOCK_SHCP_PIN11 = 12;//SHcp pin of 74HC595 
const int CLATCH_STCP_PIN12 = 11;//STcp pin of 74HC595 
const int DATA_DS_PIN14 = 10;//ds pin of 74HC595 

byte digits[] =   {B00111111, //0
                   B00000110, //1
                   B01011011, //2
                   B01001111, //3
                   B01100110, //4
                   B01101101, //5
                   B01111101, //6
                   B10000111, //7
                   B01111111, //8
                   B01101111  //9
                  };

void setup ()
{
  //set pins to output
  pinMode(CLATCH_STCP_PIN12,OUTPUT);
  pinMode(CLOCK_SHCP_PIN11 ,OUTPUT);
  pinMode(DATA_DS_PIN14,OUTPUT);
}
void loop()
{
  for(int num = 0; num <=8; num++)
  {
    digitalWrite(CLATCH_STCP_PIN12,LOW); //ground ST_CP and hold low for as long as you are transmitting
    shiftOut(DATA_DS_PIN14,CLOCK_SHCP_PIN11 ,MSBFIRST,digits[num]);
    //return the latch pin high to signal the chip that it 
    //no longer needs to listen for information
    digitalWrite(CLATCH_STCP_PIN12,HIGH); //pull the ST_CP to save the data
    delay(2000); //wait for a second
  }
}