39 lines
819 B
Arduino
39 lines
819 B
Arduino
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// Demo of MAX7219 library
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// Author: Nick Gammon
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// Date: 17 March 2015
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#include <SPI.h>
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#include <bitBangedSPI.h>
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#include <MAX7219.h>
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const byte chips = 1;
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// 1 chip, bit banged SPI on pins 6, 7, 8
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MAX7219 display (chips, 6, 7, 8); // Chips / LOAD / DIN / CLK
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void setup ()
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{
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display.begin ();
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display.sendString ("HELLO _-_-_-_-");
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delay (2000);
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display.setIntensity (2);
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display.sendString ("Lo Light");
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delay (2000);
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display.setIntensity (6);
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} // end of setup
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// scrolling display of all available characters
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void loop ()
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{
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char buf [(chips * 8) + 1];
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for (char i = '0'; i < 'z'; i++)
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{
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for (byte j = 0; j < (chips * 8); j++)
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buf [j] = i + j;
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buf [chips * 8] = 0;
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display.sendString (buf);
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delay (1000);
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} // end of for loop
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} // end of loop
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