| 1 | #include <LedControl.h> |
| 2 | |
| 3 | LedControl lc=LedControl(16,14,15,2); //datain, clk, load, number of chips |
| 4 | |
| 5 | /* we always wait a bit between updates of the display */ |
| 6 | unsigned long delaytime=250; |
| 7 | |
| 8 | void setup() { |
| 9 | /* |
| 10 | The MAX72XX is in power-saving mode on startup, |
| 11 | we have to do a wakeup call |
| 12 | */ |
| 13 | lc.shutdown(0,false); |
| 14 | /* Set the brightness to a medium values */ |
| 15 | lc.setIntensity(0,15); //0 - 15 |
| 16 | /* and clear the display */ |
| 17 | lc.clearDisplay(0); |
| 18 | } |
| 19 | |
| 20 | |
| 21 | /* |
| 22 | This method will display the characters for the |
| 23 | word "Arduino" one after the other on digit 0. |
| 24 | */ |
| 25 | void writeArduinoOn7Segment() { |
| 26 | lc.setChar(0,0,'a',false); |
| 27 | delay(delaytime); |
| 28 | lc.setRow(0,0,0x05); |
| 29 | delay(delaytime); |
| 30 | lc.setChar(0,0,'d',false); |
| 31 | delay(delaytime); |
| 32 | lc.setRow(0,0,0x1c); |
| 33 | delay(delaytime); |
| 34 | lc.setRow(0,0,B00010000); |
| 35 | delay(delaytime); |
| 36 | lc.setRow(0,0,0x15); |
| 37 | delay(delaytime); |
| 38 | lc.setRow(0,0,0x1D); |
| 39 | delay(delaytime); |
| 40 | lc.clearDisplay(0); |
| 41 | delay(delaytime); |
| 42 | } |
| 43 | |
| 44 | /* |
| 45 | This method will scroll all the hexa-decimal |
| 46 | numbers and letters on the display. You will need at least |
| 47 | four 7-Segment digits. otherwise it won't really look that good. |
| 48 | */ |
| 49 | void scrollDigits() { |
| 50 | for(int i=0;i<13;i++) { |
| 51 | lc.setDigit(0,7,i,false); |
| 52 | lc.setDigit(0,6,i+1,false); |
| 53 | lc.setDigit(0,5,i+2,false); |
| 54 | lc.setDigit(0,4,i+3,false); |
| 55 | lc.setDigit(0,3,i+4,false); |
| 56 | lc.setDigit(0,2,i+5,false); |
| 57 | lc.setDigit(0,1,i+6,false); |
| 58 | lc.setDigit(0,0,i+7,false); |
| 59 | delay(delaytime); |
| 60 | } |
| 61 | lc.clearDisplay(0); |
| 62 | delay(delaytime); |
| 63 | } |
| 64 | |
| 65 | void loop() { |
| 66 | writeArduinoOn7Segment(); |
| 67 | scrollDigits(); |
| 68 | } |