////////////////////////////////////////////////////////////////////////////////
// Name:         RO-054 LCDhello                                              //
// Platform:     Arduino Mega 2560 + LCD 16x2                                 //
// Created by:   HARB rboek2@gmail.com July 2018 GPL copyrights               //
// http://robotigs.nl/robotigs/includes/parts_header.php?idpart=266           //
// Just connect LCD and turn on. It should show a Hello.                      //
////////////////////////////////////////////////////////////////////////////////


// SET PRECOMPILER OPTIONS *****************************************************
  // Initialse conditional compiling, uncomment to include, comment to exclude -
  // Do comment for runtime versions
  #define RS232                   //Uncomment to include Serial Monitor sections
  //  #ifdef RS232   //Only include these lines if the variable has been defined

  // Define the needed header files for the precompiler, no charge if not used -
  #include <LiquidCrystal.h>                       //Default in IDE, by Tom Igoe

  // Define Arduino board pins -------------------------------------------------
  #define en   6                                         //Enable purple pin LCD
  #define rs   7                                 //Register Select white pin LCD
  #define d4   2                                      //Data line orange pin LCD
  #define d5   3                                      //Data line orange pin LCD
  #define d6   4                                      //Data line orange pin LCD
  #define d7   5                                      //Data line orange pin LCD
  
  //DEFINE VARIABLES -----------------------------------------------------------
  bool ledOnBoardVal = LOW;   //You can chose HIGH-on or LOW-off for LED_BUILTIN

  // Initialize OBJECTS --------------------------------------------------------
  LiquidCrystal lcd(rs, en, d4, d5, d6, d7);                    //Initialize LCD
//END OF PRECOMPILER OPTIONS ---------------------------------------------------

 
void setup() {
  disable_jtag();              //Disable jtag to free port C, enabled by default
  
  #if defined(RS232)       //Only compiled in if Serial Monitor must be included
    Serial.begin(9600); //Nothing more needed for the Serial Monitor to function
    Serial.println("Hello world");  //Print a message to test the serial monitor
  #endif                                          //End of conditional compiling

  lcd.begin(16, 2);                //Set up the LCD's number of columns and rows
  lcd.print("Hallo, wereld!");                      //Print a message to the LCD
} //End of setup


void loop() {                                //KEEP ON RUNNING THIS LOOP FOREVER
  lcd.setCursor(0, 1);
  lcd.print(millis() / 1000);          //Print the number of seconds since reset
} //End of void loop()                       //KEEP ON RUNNING THIS LOOP FOREVER


void disable_jtag(void) { //Disable jtag to free port C, enabled by default ****
#if defined(JTD)                           //Not all AVR controller include jtag
  MCUCR |= ( 1 << JTD );                                //Write twice to disable
  MCUCR |= ( 1 << JTD );                                       //So stutter once
#endif                                            //End of conditional compiling
} //Exit jtag_disable ----------------------------------------------------------


////////////////////////////////////////////////////////////////////////////////
// PIN ALLOCATIONS TABLE ARDUINO MEGA 2560                                    //
// Board  -Atmel- PIN - IDE - Function          - External Connection    FUNC //
//                                                                            //
// CONNECTIONS RAILS TOP LEFT: DIGITAL PWM<~> ******************************* //
// SCL    -  28 - PC5 -19/A5- ADC5/SCL/PCINT13  -                         TWI //
// SDA    -  27 - PC4 -18/A4- ADC4/SDA/PCINT12  -                         TWI //
// AREF   -  31 - REF -     - AREF              -                         REF //

// 13 PWM -  26 - PB7 -  13 - OC0A/OC1C/PCINT17 - LED Arduino LED_BUILTIN PWM //
// 12 PWM -  18 - PB6 -  12 - OC1B/PCINT16      -                         PWM //
// 11 PWM -  17 - PB3 -  11 - MOSI/OC2A/PCINT3  -                         PWM //
// 10 PWM -  16 - PB2 -  10 - SS/OC1B/PCINT2    -                         PWM //
//  9 PWM -  15 - PB1 -   9 - OC1A/PCINT1       -                         PWM //
//  8 PWM -  14 - PB0 -   8 - PCINT0/CLK0/ICP1  -                         DIO //
//                                                                            //
// CONNECTIONS RAILS TOP MIDDLE: DIGITAL PWM<~> ***************************** //
//  7 PWM -  13 - PD7 -   7 - PCINT23/AIN1      - LCD RS Register Select  PWM //
//  6 PWM -  12 - PD6 -   6 - PCINT22/OCA0/AIN0 - LCD EN ENable    purple PWM //
//  5 PWM -  11 - PD5 -   5 - PCINT21/OC0B/T1   - LCD DB4 Data 4   orange PWM //
//  4 PWM -   6 - PD4 -   4 - PCINT20/XCK/T0    - LCD DB4 Data 5   orange PWM //
//  3 PWM -   5 - PD3 -   3 - PCINT19/OC2B/INT1 - LCD DB4 Data 6   orange PWM //
//  2 PWM -   4 - PD2 -   2 - PCINT18/INT0      - LCD DB4 Data 7   orange INT //
//  1 TX0 -   3 - PD1 -   1 - PCINT17/TXD       - Serial monitor          TX0 //
//  0 RX0 -   2 - PD0 -   0 - PCINT16/RCD       - Serial Monitor          RC0 //
//                                                                            //
// CONNECTIONS RAILS TOP RIGHT: DIGITAL PWM<~> ****************************** //
// 14 TX3 -  13 - PD7 -   7 - PCINT23/AIN1      -                         DIO //
// 15 RX3 -  12 - PD6 -   6 - PCINT22/OCA0/AIN0 -                         PWM //
// 16 TX2 -  11 - PD5 -   5 - PCINT21/OC0B/T1   -                         TX2 //
// 17 RX2 -   6 - PD4 -   4 - PCINT20/XCK/T0    -                         RX2 //
// 18 TX1 -   5 - PD3 -   3 - PCINT19/OC2B/INT1 -                         INT //
// 19 RX1 -   4 - PD2 -   2 - PCINT18/INT0      -                         INT //
// 20 SDA -   3 - PD1 -   1 - PCINT17/TXD       -                         TWI //
// 21 SCL -   2 - PD0 -   0 - PCINT16/RCD       -                         TWI //
//                                                                            //
// CONNECTIONS RAILS BOTTOM LEFT: POWER ************************************* //
// 5V     -   7 - VCC -     - VCC               -                         VCC //
// RES    -   1 - RES -     - PCINT14/RESET     -                         RES //
// 3.3V   -     -     -     -                   -                             //
// 5V     -     -     -     -                   -                             //
// GND    -     -     -     -                   -                             //
// GND    -     -     -     -                   -                             //
// Vin    -     -     -     -                   -                             //
//                                                                            //
// CONNECTIONS RAILS BOTTOM CENTER: ANALOG IN ******************************* //
// A0     -  23 - PC0 -A0/14- ADC0/PCINT8       -                         ADC //
// A1     -  24 - PC1 -A1/15- ADC1/PCINT9       -                         ADC //
// A2     -  25 - PC2 -A2/16- ADC2/PCINT10      -                         ADC //
// A3     -  26 - PC3 -A3/17- ADC3/PCINT12      -                         ADC //
// A4     -  27 - PC4 -A4/18- ADC4/SDA/PCINT12  -                         TWI //
// A5     -  28 - PC5 -A5/19- ADC5/SCL/PCINT13  -                         TWI //
//                                                                            //
// CONNECTIONS RAILS BOTTOM RIGHT: ANALOG IN ******************************** //
// A08    -  89 - PK0 -     - ADC1 4/PCINT?     -                         ADC //
// A09    -  88 - PK1 -     - ADC15/PCINT?      -                         ADC //
// A10    -  87 - PK2 -     - ADC14/PCINT?      -                         ADC //
// A11    -  86 - PK3 -     - ADC15/PCINT?      -                         ADC //
// A12    -  85 - PK4 -     - ADC14/PCINT?      -                         ADC //
// A13    -  84 - PK5 -     - ADC15/PCINT?      -                         ADC //
// A14    -  83 - PK6 -     - ADC14/PCINT22     -                         ADC //
// A15    -  82 - PK7 -     - ADC15/PCINT23     -                         ADC //
//                                                                            //
// CONNECTIONS RAILS QUER RIGHT ********************************************* //
// Board  -Atmel- PIN - IDE - Function          - External Connection    FUNC //
// 32     -  58 - PC5 -     - DIO               -                         DIO //
// 44     -  40 - PL5 -     - OC5C              -                         PWM //
// 45     -  39 - PL4 -     - OC5B              -                         PWM //
// 46     -  38 - PL3 -     - OC5A              -                         PWM //
// 47     -  37 - PL2 -     - T5                -                         DIO //
// 48     -  36 - PL1 -     - ICP5              -                         DIO //
// 49     -  35 - PL0 -     - ICP4              -                         DIO //
// 50     -  22 - PB3 -     - MISO/PCINT3       -                         SPI //
// 51     -  21 - PB2 -     - MOSI/PCINT2       -                         SPI //
// 52     -  20 - PB1 -     - SCK/PCINT1        -                         SPI //
// 53     -  19 - PB1 -     - SS/PCINT0         -                         SPI //
// 54     -     - GND -     - GND               -                         GND //
// 55     -     - GND -     - GND               -                         GND //
////////////////////////////////////////////////////////////////////////////////
//345678911234567892123456789312345678941234567895123456789612345678971234567898
// EEPROM MEMORY MAP:                                                         //
// Start End  Number Description                                              //
// 0000  0000      1 Never use this memory location to be AVR compatible      //
////////////////////////////////////////////////////////////////////////////////
//345678911234567892123456789312345678941234567895123456789612345678971234567898
////////////////////////////////////////////////////////////////////////////////
// FUSES (can always be altered by using the STK500)                          //
// On-Chip Debug Enabled: off                            (OCDEN=0)            //
// JTAG Interface Enabled: off                           (JTAGEN=0)           //
// Preserve EEPROM mem through the Chip Erase cycle: On  (EESAVE = 0)         //
// Boot Flash section = 2048 words, Boot startaddr=$3800 (BOOTSZ=00)          //
// Boot Reset vector Enabled, default address=$0000      (BOOTSTR=0)          //
// CKOPT fuse (operation dependent of CKSEL fuses        (CKOPT=0)            //
// Brown-out detection level at VCC=2,7V;                (BODLEVEL=0)         //
// Ext. Cr/Res High Freq.; Start-up time: 16K CK + 64 ms (CKSEL=1111 SUT=11)  //
// LOCKBITS (are dangerous to change, since they cannot be reset)             //
// Mode 1: No memory lock features enabled                                    //
// Application Protect Mode 1: No lock on SPM and LPM in Application Section  //
// Boot Loader Protect Mode 1: No lock on SPM and LPM in Boot Loader Section  //
////////////////////////////////////////////////////////////////////////////////