max7217matrix

/* code for max 7219 from maxim
Datasheet: 
 ______________________________________
 
 Code History:
 --------------
 
 The orginal code was written for the Wiring board by:
 * Nicholas Zambetti and Dave Mellis /Interaction Design Institute Ivrea /Dec 2004
 
 First modification by:
 * Marcus Hannerstig/  K3, malm� h�gskola /2006
 
 Second modification is by:
 * tomek ness /FH-Potsdam / Feb 2007
 * http://design.fh-potsdam.de/ 
 * @acknowledgements: eric f. 
  -if you are using more then one max7219, and they all should work the same, 
 then use the function maxAll ---maxAll(register (1-8), collum (0-255))
 -if you are using more than one max7219 and just want to change something
 at one little guy, then use the function maxOne
 ---maxOne(Max you wane controll (1== the first one), register (1-8), 
 collum (0-255)). During initiation, be sure to send every part to every max7219 and then
 upload it. For example, if you have five max7219's, you have to send the scanLimit 5 times
 before you load it-- other wise not every max7219 will get the data. the
 function maxInUse  keeps track of this, just tell it how many max7219 you are
 using.
 
 
 This version by Alicia Gibb and Nathan Seidle
 *Modified Feb 2012
 *We modified the method of calling the LEDs to binary. It appears to work better this way as the Matrix.h library is no longer a library supported by Arduino.
 -----------------------------------
 
 General notes: 
 *To view pictures of the setup, go to flickr.com/photos/littlegreenfrogbot....
 *To address the matrix in binary you will need the first row of your 'segment' LEDs in the decimal place pin of the max7219 labeled "seg dp". 
 * Make sure to attach the negetive side of your LED matrix to the Digit pins of the chip and the positive side to the Segment pins of the chip.
 *This is how to address LEDS in a binary list. DP, A, B, C and so on refer to pin slot LED is in: maxSingle(1, 0b DP A B C D E F G);
 *In the binary below, 1 = LED is on in that row, 0 = LED is off 
 */

int dataIn = 2;
int load = 3;
int clock = 4;

int maxInUse = 1;    //change this variable to set how many MAX7219's you'll use and change all instances of maxSingle to maxAll

// define max7219 registers
byte max7219_reg_noop        = 0x00;
byte max7219_reg_digit0      = 0x01;
byte max7219_reg_digit1      = 0x02;
byte max7219_reg_digit2      = 0x03;
byte max7219_reg_digit3      = 0x04;
byte max7219_reg_digit4      = 0x05;
byte max7219_reg_digit5      = 0x06;
byte max7219_reg_digit6      = 0x07;
byte max7219_reg_digit7      = 0x08;
byte max7219_reg_decodeMode  = 0x09;
byte max7219_reg_intensity   = 0x0a;
byte max7219_reg_scanLimit   = 0x0b;
byte max7219_reg_shutdown    = 0x0c;
byte max7219_reg_displayTest = 0x0f;

void putByte(byte data) {
  byte i = 8;
  byte mask;

  while(i > 0) {

    mask = 0x01 << (i - 1);      // get bitmask

    digitalWrite(clock, LOW);   // tick

    if (data & mask)            // choose bit
      digitalWrite(dataIn, HIGH);// send 1
    else
      digitalWrite(dataIn, LOW); // send 0

    digitalWrite(clock, HIGH);   // tock

    --i;                         // move to lesser bit
  }
}

void maxSingle(byte reg, byte col) {    
  //maxSingle is the "easy"  function to use for a     //single max7219

  digitalWrite(load, LOW);       // begin     
  putByte(reg);                  // specify register
  putByte(col);
  digitalWrite(load, HIGH); 
}

void setup () {

  pinMode(dataIn, OUTPUT);
  pinMode(clock,  OUTPUT);
  pinMode(load,   OUTPUT);

  Serial.begin(9600);

  //initiation of the max 7219
  maxSingle(max7219_reg_scanLimit, 0x07);      
  maxSingle(max7219_reg_decodeMode, 0x00);  // using an led matrix (not digits)
  maxSingle(max7219_reg_shutdown, 0x01);    // not in shutdown mode
  maxSingle(max7219_reg_displayTest, 0x00); // no display test
  maxSingle(max7219_reg_intensity, 0x0f);    // set intensity to maximum

  for (int e = 1 ; e <= 8 ; e++) {    // empty registers, turn all LEDs off 
    maxSingle(e, 0);

    // This list will make all LEDs turn on and stay on - it's a nice feature to check if your connects are all working
    //This is how to address LEDS in a binary list. DP, A, B, C and so on refer to pin slot LED is in: maxSingle(1, 0b DP A B C D E F G);
 /*
    maxSingle(1, 0b11110000); 
    maxSingle(2, 0b11110000); 
    maxSingle(3, 0b11110000);
    maxSingle(4, 0b11110000);
    maxSingle(5, 0b11110000);
    maxSingle(6, 0b11110000);
    maxSingle(7, 0b11110000);
    maxSingle(8, 0b11110000);
  */
  } 
}


void loop () {
  //This is how to address LEDS in a binary list. DP, A, B, C and so on refer to pin slot LED is in: maxSingle(1, 0b DP A B C D E F G);
/*
  //This chunk of code animates LEDs in a diagonal pattern
   maxSingle(1, 0b10000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b0000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn all LEDs off in this row
   maxSingle(2, 0b01000000); //Turn on one LED in this row
   maxSingle(3, 0b00000000); //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn all LEDs off in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b00100000); //Turn on one LED in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn all LEDs off in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b00000000); //Turn all LEDs off in this row
   maxSingle(4, 0b00010000); //Turn on one LED in this row
   delay(200);
*/
  //This chunk of code animates LEDs in sequence
  //There is a more efficient way of iterating each LED in sequence, show me more efficient code for 3 points extra credit
 /* 
   maxSingle(1, 0b10000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b0000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b01000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b0000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00100000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b0000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00010000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b0000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b10000000); //Turn all LEDs off in this row
   maxSingle(3, 0b0000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b01000000); //Turn all LEDs off in this row
   maxSingle(3, 0b0000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b00100000); //Turn all LEDs off in this row
   maxSingle(3, 0b0000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b00010000); //Turn all LEDs off in this row
   maxSingle(3, 0b0000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b10000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b01000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b00100000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b00010000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b00000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b10000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b00000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b01000000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b00000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00100000); //Turn all LEDs off in this row
   delay(200);
   maxSingle(1, 0b00000000); //Turn on one LED in this row
   maxSingle(2, 0b00000000); //Turn all LEDs off in this row
   maxSingle(3, 0b00000000);  //Turn all LEDs off in this row
   maxSingle(4, 0b00010000); //Turn all LEDs off in this row
   delay(200);
   */
   
    maxSingle(2, 0b00100000);  //Turn all LEDs off in this row
   maxSingle(1, 0b01100000); //Turn all LEDs off in this row
   maxSingle(3, 0b10000000); //Turn all LEDs off in this row  
 }