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| //We always have to include the library
#include "LedControl.h"
/\*
Now we need a LedControl to work with.
\*\*\*\*\* These pin numbers will probably not work with your hardware \*\*\*\*\*
pin 12 is connected to the DataIn
pin 11 is connected to the CLK
pin 10 is connected to LOAD
We have only a single MAX72XX.
\*/
LedControl lc=LedControl(12,10,11,1);
/\* we always wait a bit between updates of the display \*/
unsigned long delaytime=250;
void setup() {
/\*
The MAX72XX is in power-saving mode on startup,
we have to do a wakeup call
\*/
lc.shutdown(0,false);
/\* Set the brightness to a medium values \*/
lc.setIntensity(0,8);
/\* and clear the display \*/
lc.clearDisplay(0);
}
/\*
This method will display the characters for the
word "Arduino" one after the other on digit 0.
\*/
void writeArduinoOn7Segment() {
lc.setChar(0,0,'a',false);
delay(delaytime);
lc.setRow(0,0,0x05);
delay(delaytime);
lc.setChar(0,0,'d',false);
delay(delaytime);
lc.setRow(0,0,0x1c);
delay(delaytime);
lc.setRow(0,0,B00010000);
delay(delaytime);
lc.setRow(0,0,0x15);
delay(delaytime);
lc.setRow(0,0,0x1D);
delay(delaytime);
lc.clearDisplay(0);
delay(delaytime);
}
/\*
This method will scroll all the hexa-decimal
numbers and letters on the display. You will need at least
four 7-Segment digits. otherwise it won't really look that good.
\*/
void scrollDigits() {
for(int i=0;i<13;i++) {
lc.setDigit(0,3,i,false);
lc.setDigit(0,2,i+1,false);
lc.setDigit(0,1,i+2,false);
lc.setDigit(0,0,i+3,false);
lc.setDigit(0,7,i,false);
lc.setDigit(0,6,i+1,false);
lc.setDigit(0,5,i+2,false);
lc.setDigit(0,4,i+3,false);
delay(delaytime);
}
lc.clearDisplay(0);
delay(delaytime);
}
void loop() {
writeArduinoOn7Segment();
scrollDigits();
}
|
