#include <SPI.h>
#include <LedMatrix.h>

//LED Matrix Pins
#define NUMBER_OF_DEVICES 4
#define CS_PIN 15
#define CLK_PIN 14
#define MISO_PIN 2 //Not Used
#define MOSI_PIN 12

LedMatrix ledMatrix = LedMatrix(NUMBER_OF_DEVICES, CLK_PIN, MISO_PIN, MOSI_PIN, CS_PIN);

void setup() {
  ledMatrix.init();
  ledMatrix.setText("Jam");

  pinMode(4, INPUT_PULLDOWN);
  pinMode(5, INPUT_PULLDOWN);
  pinMode(16, INPUT_PULLDOWN);
  pinMode(17, INPUT_PULLDOWN);
  pinMode(18, INPUT_PULLDOWN);
  pinMode(19, INPUT_PULLDOWN);
  pinMode(21, INPUT_PULLDOWN);
  pinMode(23, INPUT_PULLDOWN);

  analogReadResolution(10);
  pinMode(32, INPUT);
  pinMode(33, INPUT);
  pinMode(34, INPUT);
  pinMode(35, INPUT);
  pinMode(36, INPUT);
}

void loop() {
  for (int i=0; i<28; i++)
  {
    ledMatrix.clear();
    ledMatrix.scrollTextLeft();
    ledMatrix.drawText();
    ledMatrix.commit();
    delay(100);
  }
  delay(1500);

  while (1)
  {
    ledMatrix.clear();
    int pot1 = analogRead(32)/110;
    setcolbotval(5,pot1);
    setcolbotval(6,pot1);
    setcolbotval(7,pot1);
    int pot2 = analogRead(33)/110;
    setcolbotval(10,pot2);
    setcolbotval(11,pot2);
    setcolbotval(12,pot2);
    int pot3 = analogRead(34)/110;
    setcolbotval(15,pot3);
    setcolbotval(16,pot3);
    setcolbotval(17,pot3);
    int pot4 = analogRead(35)/110;
    setcolbotval(20,pot4);
    setcolbotval(21,pot4);
    setcolbotval(22,pot4);
    int pot5 = analogRead(36)/110;
    setcolbotval(25,pot5);
    setcolbotval(26,pot5);
    setcolbotval(27,pot5);
    char btns = 0;
    if (digitalRead(4) == HIGH)  btns+=1;
    if (digitalRead(5) == HIGH)  btns+=2;
    if (digitalRead(16) == HIGH) btns+=4;
    if (digitalRead(17) == HIGH) btns+=8;
    if (digitalRead(18) == HIGH) btns+=16;
    if (digitalRead(19) == HIGH) btns+=32;
    if (digitalRead(21) == HIGH) btns+=64;
    if (digitalRead(23) == HIGH) btns+=128;
    setcolmask(29,btns);
    setcolmask(30,btns);
    setcolmask(31,btns);
    ledMatrix.commit();
    delay(100);
  }
}

//sets an LED column according to bitmask
void setcolmask(int col, char bits)
{
    for (int i=0; i<8; i++)
    {
       if (bits & (1<<i))
         ledMatrix.setPixel(col,i);
    }
}

//sets an LED column from the bottom up with value 0-8
void setcolbotval(int col, char val)
{
    for (int i=0; i<8; i++)
    {
       int cmp = i+1;
       if (val>=cmp)
         ledMatrix.setPixel(col,(7-i));
    }
}