Subversion Repositories group.electronics

#include <Encoder.h>

// Delays for certain events in ms

const int ROTARY_DELAY = 100;    // Time between checking for rotary turns

const int BUTTON_DELAY = 800;    // Button debouncing, and repeating

const int FLASH_DELAY = 600;     // How long to flash the entire row after button press

const int CURSOR_DELAY = 200;    // How quickly to flash the cursor led

// Pin Assignments

uint8_t rota = 2;

uint8_t rotb = 3;

uint8_t button = 4;

uint8_t dataIn = 5;

uint8_t load = 6;

uint8_t clock = 7;

uint8_t trigger = 12;

int maxInUse = 1; 

uint8_t x = 0;

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;

Encoder knobLeft(rota, rotb);

char id=0;

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);//((data & 0x01) * 256) + data >> 1); // put data  

  digitalWrite(load, LOW);       // and load da shit

  digitalWrite(load,HIGH);

}

void maxAll (byte reg, byte col) {    // initialize  all  MAX7219's in the system

  int c = 0;

  digitalWrite(load, LOW);  // begin    

  for ( c =1; c<= maxInUse; c++) {

  putByte(reg);  // specify register

  putByte(col);//((data & 0x01) * 256) + data >> 1); // put data

    }

  digitalWrite(load, LOW);

  digitalWrite(load,HIGH);

}

void maxOne(byte maxNr, byte reg, byte col) {    

//maxOne is for adressing different MAX7219's,

//whilele having a couple of them cascaded

  int c = 0;

  digitalWrite(load, LOW);  // begin    

  for ( c = maxInUse; c > maxNr; c--) {

    putByte(0);    // means no operation

    putByte(0);    // means no operation

  }

  putByte(reg);  // specify register

  putByte(col);//((data & 0x01) * 256) + data >> 1); // put data

  for ( c =maxNr-1; c >= 1; c--) {

    putByte(0);    // means no operation

    putByte(0);    // means no operation

  }

  digitalWrite(load, LOW); // and load da shit

  digitalWrite(load,HIGH);

}

void setup () {

  pinMode(dataIn, OUTPUT);

  pinMode(clock,  OUTPUT);

  pinMode(load,   OUTPUT);

  pinMode(button, INPUT);

  pinMode(trigger, OUTPUT);

  digitalWrite(button, HIGH);

  digitalWrite(13, LOW);  

  digitalWrite(trigger, LOW);

  //initiation of the max 7219

  maxAll(max7219_reg_scanLimit, 0x07);      

  maxAll(max7219_reg_decodeMode, 0x00);  // using an led matrix (not digits)

  maxAll(max7219_reg_shutdown, 0x01);    // not in shutdown mode

  maxAll(max7219_reg_displayTest, 0x00); // no display test

  for (x=1; x<=8; x++) {    // empty registers, turn all LEDs off

    maxAll(x,0);

  }

  maxAll(max7219_reg_intensity, 0x01 & 0x0f);  // the first 0x0f is the value you can set range: 0x00 to 0x0f

}  

// Value to display a single LED on a row

uint8_t values[9] = {0, 1, 2, 4, 8, 16, 32, 64, 128};

// Array with all rows, indicating which 'value' to show

uint8_t line[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 

// What row we are current working with

uint8_t idx = 0;

// Our delay counters (in ms)

int delayButton = 0;

int delayRotary = ROTARY_DELAY;

int delayFlash = 0;

int delayCursor = CURSOR_DELAY;

int cursorState = 0;

// Rotary position, reset after each loop

long pos = 0;

// Do we update the matrix this run?

uint8_t update = 1;

void loop () { 

  // Flash the row after a button press

  if (delayFlash && idx != 8) {

    maxSingle(idx+1, 255);

    if (delayFlash == 1) {

      maxSingle(idx+1, values[line[idx+1]]);

    }

    delayFlash--;

    if (delayButton) delayButton--;

    return;

  } 

  // Check for button press

  if (delayButton) delayButton--;

  if (!digitalRead(4) && delayButton == 0) { 

    if (idx == 8) 

      idx = 0;

     else

       idx++;

     delayButton = BUTTON_DELAY;

     delayFlash = FLASH_DELAY;

  }

  // Checks for rotary turning, and update

  //  the matrix buffer

  // My rotary encoder had '2 turns' per detent, making

  //  it awkward to move a single position. This is why

  //  the check is for > 1 and < -1 to make it a full detent.

  if (delayRotary) delayRotary--;

  if (delayRotary == 0 && idx != 8) {

    pos = knobLeft.read();

    if (pos > 1) {

      if (line[idx] != 0)

        line[idx]--;

      else

        line[idx] = 8;

      update = 1;

    } else if (pos < -1) {

      if (line[idx] != 8)

        line[idx]++;

      else

        line[idx]= 0;

      update = 1;

    }

    if (update) { 

      knobLeft.write(0);

      delayRotary = ROTARY_DELAY;

      if (pos) {

        cursorState = 1;

        delayCursor = CURSOR_DELAY;

      }

    }

  }

  // Toggle the state of the cursor after the

  //  cursor delay (in ms) has been reached

  if (delayCursor) delayCursor--; 

  if (delayCursor == 0 && idx != 8) {

    delayCursor = CURSOR_DELAY;

    cursorState = 1 - cursorState;

    update = 1; 

  }

  // Update the matrix only if a change has been made

  if (update) {

    for (x = 0; x<8; x++) {

       if (x == idx) {

         if (cursorState && line[x] != 0)

             maxSingle(x+1, values[line[x]]);

         else

             maxSingle(x+1, 0);

       } else {

         if (line[x] == 0) continue;

         digitalWrite(trigger, HIGH);

         maxSingle(x+1, values[line[x]]);

         digitalWrite(trigger, LOW);

       }

    }

    update = 0;

  }

  delay(1);

}