Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- #define dataPin 4 // wire to 74HC595 pin 14
- #define latchPin 7 // wire to 74HC595 pin 12
- #define clockPin 8 // wire to 74HC595 pin 11
- const char common = 'c'; // common cathode
- void setup() {
- // initialize I/O pins
- pinMode(dataPin, OUTPUT);
- pinMode(latchPin, OUTPUT);
- pinMode(clockPin, OUTPUT);
- }
- void loop() {
- // generate characters to display for hexidecimal numbers 0 to F
- for (int i = 0; i <= 15; i++) {
- byte bits = myfnNumToBits(i) ;
- digitalWrite(latchPin, LOW); // prepare shift register for data
- shiftOut(dataPin, clockPin, LSBFIRST, bits); // send data
- digitalWrite(latchPin, HIGH); // update display
- delay(500); // pause for 1/2 second
- }
- }
- //*****************************************************************************//
- // convert decimal number to segments to turn ON. The function get a decimal number
- // and return a byte to send to shift register
- //*****************************************************************************//
- byte myfnNumToBits(int someNumber) {
- switch (someNumber) {
- case 0:
- return B11111100;
- break;
- case 1:
- return B01100000;
- break;
- case 2:
- return B11011010;
- break;
- case 3:
- return B11110010;
- break;
- case 4:
- return B01100110;
- break;
- case 5:
- return B10110110;
- break;
- case 6:
- return B10111110;
- break;
- case 7:
- return B11100000;
- break;
- case 8:
- return B11111110;
- break;
- case 9:
- return B11110110;
- break;
- case 10:
- return B11101110; // Hexidecimal A
- break;
- case 11:
- return B00111110; // Hexidecimal B
- break;
- case 12:
- return B10011100; // Hexidecimal C or use for Centigrade
- break;
- case 13:
- return B01111010; // Hexidecimal D
- break;
- case 14:
- return B10011110; // Hexidecimal E
- break;
- case 15:
- return B10001110; // Hexidecimal F or use for Fahrenheit
- break;
- default:
- return B10010010; // Error condition, displays three vertical bars
- break;
- }
- }
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement