/*
  SPS System mit dem Arduino.
  Version 0.10
  18.11.2018 WKLA
  - new standard programming mode
  i added a new programming mode for the default programming, because i thing the old one was a little bit clumsy.
  the new one has a nicer interface, as you now always know where you are.
  Starting with PRG pushed after Reset.
  as a result, all LEDs will shortly blink
  now you are in programming mode.
  * the D1 LED will blink
  * the higher nibble of the address will be shown
  * the D2 LED will blink
  * the lower nibble of the address will be shown
  * the D3 LED will blink
  * the command part (high nibble) will be shown
  * with SEL you can step thru all commands
  * PRG will save the command
  * the D4 LED will blink 
  * the data part (low nibble) will be shown
  * with SEL you can step thru all datas
  * PRG will save the data
  * if the new value has been changed, all LEDs will flash as the byte will be written to the EEPROM
  * address will be increased and now it will start with blinking of the D1 LED
  * 
  * To leave the programming simply push reset.
  

  Version 0.9
  18.11.2018 WKLA
  - BUGs entfernt. Release.
  10.11.2018 WKLA
  - Implementierung Tone Befehl

  Version 0.8
  06.11.2018 WKLA
  - Umstellung auf dbgOut
  - Display TM1637 Anbindung

  Version 0.7
  24.09.2012 WKLA
  - neue Berechnung A = B - A und Swap A,B...
  - Stack auf 16 Bytes berschränkt, wird zu oft gepusht, werden die alten Werte rausgeschoben.

  Basierd auf dem TPS System vom elektronik-labor.
  Erweiterungen:
  - es können bis zu 6 Unterroutinen definiert werden und diese direkt angesprungen werden.
  - neben return gibt's auch einen restart
  - 2 Servoausgänge für übliche RC Servos. (10° Auflösung in Nibble Modus, <1° Auflösung im Bytemodus)
  ACHTUNG: Servo und PWM Ausgänge sind nicht mischbar und können auch nicht gleichzeitig benutzt werden.
  - 2 RC Eingänge (16 Schritte auflösung im nibble Modus, Mitte 8, 255 Schritte im Byte Modus)
  - fkt. auch mit einem ATTiny84 (44 ist leider auf GRund der Programmgröße nicht mehr für den erweiterten Befehlssatz möglich)
  - call stack von bis zu 16 Unterfunktionen
  - neue Register e,f
*/

// Program im Debugmodus kompilieren, dann werden zus. Ausgaben auf die serielle Schnittstelle geschrieben.

#ifdef __AVR_ATtiny4313__
#define SPS_RCRECEIVER
#endif

#ifdef __AVR_ATmega328P__
//#define debug
#define SPS_USE_DISPLAY
#define SPS_RECEIVER
#define SPS_ENHANCEMENT
#define SPS_SERVO
#define SPS_TONE
#endif

#ifdef __AVR_ATtiny84__
#define SPS_ENHANCEMENT
#define SPS_SERVO
//#define SPS_TONE
#endif

#include <debug.h>
#include <makros.h>
#include <EEPROM.h>
#include <avr/eeprom.h>

#ifdef SPS_SERVO
#include <Servo.h>
#endif

#ifdef SPS_ENHANCEMENT
#include <avdweb_Switch.h>
#endif

#ifdef SPS_TONE
#include "notes.h"
#endif

// Hardwareanbindung
#ifdef __AVR_ATmega328P__
// Arduino Hardware
const byte Din_0 = 0;
const byte Din_1 = 1;
const byte Din_2 = 2;
const byte Din_3 = 3;

const byte Dout_0 = 4;
const byte Dout_1 = 5;
const byte Dout_2 = 6;
const byte Dout_3 = 7;

const byte ADC_0 = 0; //(15)
const byte ADC_1 = 1; //(16)
const byte PWM_1 = 9;
const byte PWM_2 = 10;
#ifdef SPS_RCRECEIVER
const byte RC_0 = 18;
const byte RC_1 = 19;
#endif

#ifdef SPS_SERVO
const byte SERVO_1 = 9;
const byte SERVO_2 = 10;
#endif

const byte SW_PRG = 8;
const byte SW_SEL = 11;

#ifdef SPS_USE_DISPLAY
const byte DIGIT_DATA_IO = 12;
const byte DIGIT_CLOCK = 13;
#endif
#endif

#ifdef __AVR_ATtiny84__
// ATTiny84 Hardware
const byte Dout_0 = 6;
const byte Dout_1 = 5;
const byte Dout_2 = 4;
const byte Dout_3 = 1;

const byte Din_0 = 10;
const byte Din_1 = 9;
const byte Din_2 = 8;
const byte Din_3 = 7;
const byte ADC_0 = 0;
const byte ADC_1 = 1;
const byte PWM_1 = 2;
const byte PWM_2 = 3;
#ifdef SPS_RCRECEIVER
const byte RC_0 = 10;
const byte RC_1 = 9;
#endif

#ifdef SPS_SERVO
const byte SERVO_1 = 2;
const byte SERVO_2 = 3;
#endif

const byte SW_PRG = 0;
const byte SW_SEL = 8;

#ifdef SPS_USE_DISPLAY
const byte DIGIT_DATA_IO = 4;
const byte DIGIT_CLOCK = 5;
#endif
#endif

#ifdef __AVR_ATtiny4313__
// ATTiny4313 Hardware
const byte Dout_0 = 0;
const byte Dout_1 = 1;
const byte Dout_2 = 2;
const byte Dout_3 = 3;

const byte Din_0 = 4;
const byte Din_1 = 5;
const byte Din_2 = 6;
const byte Din_3 = 7;
const byte ADC_0 = 13;
const byte ADC_1 = 14;
const byte PWM_1 = 11;
const byte PWM_2 = 12;

#ifdef SPS_RCRECEIVER
const byte RC_0 = 15;
const byte RC_1 = 16;
#endif

#ifdef SPS_SERVO
const byte SERVO_1 = 11;
const byte SERVO_2 = 12;
#endif

const byte SW_PRG = 9;
const byte SW_SEL = 8;
#endif

// Befehle
const byte PORT = 0x10;
const byte DELAY = 0x20;
const byte JUMP_BACK = 0x30;
const byte SET_A = 0x40;
const byte IS_A = 0x50;
const byte A_IS = 0x60;
const byte CALC = 0x70;
const byte PAGE = 0x80;
const byte JUMP = 0x90;
const byte C_COUNT = 0xA0;
const byte D_COUNT = 0xB0;
const byte SKIP_IF = 0xC0;
const byte CALL = 0xD0;
const byte CALL_SUB = 0xE0;
const byte CMD_BYTE = 0xF0;

// debouncing with 100ms
const byte DEBOUNCE = 100;

// sub routines
const byte subCnt = 7;
word subs[subCnt];

word addr;
word page;

#ifdef SPS_ENHANCEMENT
const byte SAVE_CNT = 16;
#else
const byte SAVE_CNT = 1;
#endif

word saveaddr[SAVE_CNT];
byte saveCnt;

#ifdef SPS_ENHANCEMENT
byte stack[SAVE_CNT];
byte stackCnt;
#endif

unsigned long tmpValue;

byte a, b, c, d;

#ifdef SPS_ENHANCEMENT
byte e, f;
#endif

#ifdef SPS_SERVO
Servo servo1;
Servo servo2;
#endif

byte prog = 0;
byte data = 0;
byte com = 0;

void setup() {
  pinMode(Dout_0, OUTPUT);
  pinMode(Dout_1, OUTPUT);
  pinMode(Dout_2, OUTPUT);
  pinMode(Dout_3, OUTPUT);

  pinMode(PWM_1, OUTPUT);
  pinMode(PWM_2, OUTPUT);

  pinMode(Din_0, INPUT_PULLUP);
  pinMode(Din_1, INPUT_PULLUP);
  pinMode(Din_2, INPUT_PULLUP);
  pinMode(Din_3, INPUT_PULLUP);

  pinMode(SW_PRG, INPUT_PULLUP);
  pinMode(SW_SEL, INPUT_PULLUP);

#ifdef SPS_USE_DISPLAY
  initDisplay();
#endif

  // Serielle Schnittstelle einstellen
#ifndef __AVR_ATtiny84__
  initDebug();
#endif

  doReset();

  if (digitalRead(SW_PRG) == 0) {
    programMode();
  }
#ifdef SPS_ENHANCEMENT
  pinMode(LED_BUILTIN, OUTPUT);
  if (digitalRead(SW_SEL) == 0) {
    serialPrg();
  }
  
#endif
}

void doReset() {
  dbgOutLn("Reset");
#ifdef SPS_SERVO
  servo1.detach();
  servo2.detach();
#endif

  for (int i = 0; i < subCnt; i++) {
    subs[i] = 0;
  }

  readProgram();

  addr = 0;
  page = 0;
  saveCnt = 0;
  a = 0;
  b = 0;
  c = 0;
  d = 0;
#ifdef SPS_ENHANCEMENT
  e = 0;
  f = 0;
#endif
}

/*
  getting all addresses of sub programms
*/
void readProgram() {
  dbgOutLn("Read program");
  word addr = 0;
  for ( addr = 0; addr <= E2END; addr++) {
    byte value = EEPROM.read(addr);

#ifdef debug
    dbgOut2(value, HEX);
    if (((addr + 1) % 16) == 0) {
      dbgOutLn();
    }
    else {
      dbgOut(",");
    }
#endif

    if (value == 0xFF) {
      // ende des Programms
      break;
    }
    byte cmd = (value & 0xF0);
    byte data = (value & 0x0F);

    dbgOut("(");
    dbgOut2(cmd, HEX);
    dbgOut2(data, HEX);
    dbgOut(")");

    if (cmd == CALL_SUB) {
      if (data >= 8) {
        data = data - 8;
        subs[data] = addr + 1;
      }
    }
#ifdef SPS_SERVO
    if ((cmd == IS_A) && (data == 0x0B)) {
      if (!servo1.attached()) {
        dbgOutLn("attach Srv1");
        servo1.attach(SERVO_1);
      }
    } else if ((cmd == CMD_BYTE) && (data == 0x06)) {
      if (!servo1.attached()) {
        dbgOutLn("attach Srv1");
        servo1.attach(SERVO_1);
      }
    } else if ((cmd == IS_A) && (data == 0x0C)) {
      if (!servo2.attached()) {
        dbgOutLn("attach Srv2");
        servo2.attach(SERVO_2);
      }
    } else if ((cmd == CMD_BYTE) && (data == 0x07)) {
      if (!servo2.attached()) {
        dbgOutLn("attach Srv2");
        servo2.attach(SERVO_2);
      }
    }
#endif
  }
  dbgOutLn();
}

/*
  main loop
*/
void loop() {
  byte value = EEPROM.read(addr);
  byte cmd = (value & 0xF0);
  byte data = (value & 0x0F);

  dbgOut2(addr, HEX);
  dbgOut(":");
  dbgOut2(value, HEX);
  dbgOut(",");
  dbgOut2(cmd, HEX);
  dbgOut(",");
  dbgOut2(data, HEX);
  dbgOut(",a:");
  dbgOut2(a, HEX);
  dbgOut(",");
  dbgOut2(b, HEX);
  dbgOut(",");
  dbgOut2(c, HEX);
  dbgOut(",");
  dbgOut2(d, HEX);
  dbgOut(",");
  dbgOut2(e, HEX);
  dbgOut(",");
  dbgOut2(f, HEX);
  dbgOutLn();

  addr = addr + 1;
  switch (cmd) {
    case PORT:
      doPort(data);
      break;
    case DELAY:
      doDelay(data);
      break;
    case JUMP_BACK:
      doJumpBack(data);
      break;
    case SET_A:
      doSetA(data);
      break;
    case A_IS:
      doAIs(data);
      break;
    case IS_A:
      doIsA(data);
      break;
    case CALC:
      doCalc(data);
      break;
    case PAGE:
      doPage(data);
      break;
    case JUMP:
      doJump(data);
      break;
    case C_COUNT:
      doCCount(data);
      break;
    case D_COUNT:
      doDCount(data);
      break;
    case SKIP_IF:
      doSkipIf(data);
      break;
    case CALL:
      doCall(data);
      break;
    case CALL_SUB:
      doCallSub(data);
      break;
    case CMD_BYTE:
      doByte(data);
      break;
    default:
      ;
  }
  if (addr > E2END) {
    doReset();
  }
}

/*
  output to port
*/
void doPort(byte data) {
  digitalWrite(Dout_0, (data & 0x01) > 0);
  digitalWrite(Dout_1, (data & 0x02) > 0);
  digitalWrite(Dout_2, (data & 0x04) > 0);
  digitalWrite(Dout_3, (data & 0x08) > 0);
}

/*
  delay in ms
*/
void doDelay(byte data) {
  dbgOut("dly: ");
  dbgOutLn2(data, HEX);

  switch (data) {
    case 0:
      delay(1);
      break;
    case 1:
      delay(2);
      break;
    case 2:
      delay(5);
      break;
    case 3:
      delay(10);
      break;
    case 4:
      delay(20);
      break;
    case 5:
      delay(50);
      break;
    case 6:
      delay(100);
      break;
    case 7:
      delay(200);
      break;
    case 8:
      delay(500);
      break;
    case 9:
      delay(1000);
      break;
    case 10:
      delay(2000);
      break;
    case 11:
      delay(5000);
      break;
    case 12:
      delay(10000);
      break;
    case 13:
      delay(20000);
      break;
    case 14:
      delay(30000);
      break;
    case 15:
      delay(60000);
      break;
    default:
      break;
  }
}

/*
  jump relative back
*/
void doJumpBack(byte data) {
  addr = addr - data - 1;
}

/*
  a = data
*/
void doSetA(byte data) {
  a = data;
}

/*
  a = somthing;
*/
void doAIs(byte data) {
  switch (data) {
    case 1:
      a = b;
      break;
    case 2:
      a = c;
      break;
    case 3:
      a = d;
      break;
    case 4:
      a = digitalRead(Din_0) + (digitalRead(Din_1) << 1) + (digitalRead(Din_2) << 2) + (digitalRead(Din_3) << 3);
      break;
    case 5:
      a = digitalRead(Din_0);
      break;
    case 6:
      a = digitalRead(Din_1);
      break;
    case 7:
      a = digitalRead(Din_2);
      break;
    case 8:
      a = digitalRead(Din_3);
      break;
#ifndef __AVR_ATtiny4313__
    case 9:
      tmpValue = analogRead(ADC_0);
      a = tmpValue / 64; //(Umrechnen auf 4 bit)
      break;
    case 10:
      tmpValue = analogRead(ADC_1);
      a = tmpValue / 64; //(Umrechnen auf 4 bit)
      break;
#else
    case 9:
      a = digitalRead(ADC_0);
      break;
    case 10:
      a = digitalRead(ADC_1);
      break;
#endif
#ifdef SPS_RCRECEIVER
    case 11:
      tmpValue = pulseIn(RC_0, HIGH, 100000);
      if (tmpValue < 1000) {
        tmpValue = 1000;
      }
      if (tmpValue > 2000) {
        tmpValue = 2000;
      }
      a = (tmpValue - 1000) / 64; //(Umrechnen auf 4 bit)
      dbgOut("RC1:");
      dbgOut(tmpValue);
      dbgOut("=");
      dbgOutLn(a);
      break;
    case 12:
      tmpValue = pulseIn(RC_1, HIGH, 100000);
      if (tmpValue < 1000) {
        tmpValue = 1000;
      }
      if (tmpValue > 2000) {
        tmpValue = 2000;
      }
      a = (tmpValue - 1000) / 64; //(Umrechnen auf 4 bit)
      dbgOut("RC2:");
      dbgOut(tmpValue);
      dbgOut("=");
      dbgOutLn(a);
      break;
#endif
#ifdef SPS_ENHANCMENT
    case 13:
      a = e;
      break;
    case 14:
      a = f;
      break;
    case 15:
      if (stackCnt > 0) {
        stackCnt -= 1;
        a = stack[stackCnt];
      } else {
        a = 0;
      }
      break;
#endif
    default:
      break;
  }
}

/*
  somthing = a;
*/
void doIsA(byte data) {
  switch (data) {
#ifdef SPS_ENHANCEMENT
    case 0:
      swap(a, b, byte);
      break;
#endif
    case 1:
      b = a;
      break;
    case 2:
      c = a;
      break;
    case 3:
      d = a;
      break;
    case 4:
      doPort(a);
      break;
    case 5:
      digitalWrite(Dout_0, (a & 0x01) > 0);
      break;
    case 6:
      digitalWrite(Dout_1, (a & 0x01) > 0);
      break;
    case 7:
      digitalWrite(Dout_2, (a & 0x01) > 0);
      break;
    case 8:
      digitalWrite(Dout_3, (a & 0x01) > 0);
      break;
    case 9:
      tmpValue = a * 16;
      dbgOut("PWM1:");
      dbgOutLn(tmpValue);
      analogWrite(PWM_1, tmpValue);
      break;
    case 10:
      tmpValue = a * 16;
      dbgOut("PWM2:");
      dbgOutLn(tmpValue);
      analogWrite(PWM_2, tmpValue);
      break;
#ifdef SPS_SERVO
    case 11:
      if (servo1.attached()) {
        tmpValue = (a * 10) + 10;
        dbgOut("Srv1:");
        dbgOutLn(tmpValue);
        servo1.write(tmpValue);
      }
      break;
    case 12:
      if (servo2.attached()) {
        tmpValue = (a * 10) + 10;
        dbgOut("Srv2:");
        dbgOutLn(tmpValue);
        servo2.write(tmpValue);
      }
      break;
#endif
#ifdef SPS_ENHANCEMENT
    case 13:
      e = a;
      break;
    case 14:
      f = a;
      break;
    case 15:
      if (stackCnt < SAVE_CNT) {
        stack[stackCnt] = a;
        stackCnt += 1;
      }
      else {
        for (int i = 1; i <= SAVE_CNT; i++) {
          stack[i - 1] = stack[i];
        }
        stack[stackCnt] = a;
      }
      break;
#endif
    default:
      break;
  }
}

/*
  calculations
*/
void doCalc(byte data) {
  switch (data) {
    case 1:
      a = a + 1;
      break;
    case 2:
      a = a - 1;
      break;
    case 3:
      a = a + b;
      break;
    case 4:
      a = a - b;
      break;
    case 5:
      a = a * b;
      break;
    case 6:
      a = a / b;
      break;
    case 7:
      a = a & b;
      break;
    case 8:
      a = a | b;
      break;
    case 9:
      a = a ^ b;
      break;
    case 10:
      a = !a;
      break;
#ifdef SPS_ENHANCEMENT
    case 11:
      a = a % b;
      break;
    case 12:
      a = a + 16 * b;
      break;
    case 13:
      a = b - a;
      break;
#endif
    default:
      break;
  }
#ifndef SPS_ENHANCEMENT
  a = a & 15;
#endif
}

/*
  setting page
*/
void doPage(byte data) {
  page = data * 16;
}

/*
  jump absolute
*/
void doJump(byte data) {
#ifdef debug
  dbgOut("J");
  dbgOut2(page, HEX);
  dbgOutLn2(data, HEX);
#endif
  addr = page + data;
}

/*
  counting with c register
*/
void doCCount(byte data) {
  if (c > 0) {
    c -= 1;
    c = c & 0x0F;
    doJump(data);
  }
}

/*
  counting with d register
*/
void doDCount(byte data) {
  if (d > 0) {
    d -= 1;
    d = d & 0x0F;
    doJump(data);
  }
}

/*
  simple comdition = true skip next command
*/
void doSkipIf(byte data) {
  bool skip = false;
  switch (data) {
#ifdef SPS_ENHANCEMENT
    case 0:
      skip = (a == 0);
      break;
#endif
    case 1:
      skip = (a > b);
      break;
    case 2:
      skip = (a < b);
      break;
    case 3:
      skip = (a == b);
      break;
    case 4:
      skip = digitalRead(Din_0);
      break;
    case 5:
      skip = digitalRead(Din_1);
      break;
    case 6:
      skip = digitalRead(Din_2);
      break;
    case 7:
      skip = digitalRead(Din_3);
      break;
    case 8:
      skip = !digitalRead(Din_0);
      break;
    case 9:
      skip = !digitalRead(Din_1);
      break;
    case 10:
      skip = !digitalRead(Din_2);
      break;
    case 11:
      skip = !digitalRead(Din_3);
      break;
    case 12:
      skip = !digitalRead(SW_PRG);
      break;
    case 13:
      skip = !digitalRead(SW_SEL);
      break;
    case 14:
      skip = digitalRead(SW_PRG);
      break;
    case 15:
      skip = digitalRead(SW_SEL);
      break;
    default:
      break;
  }
  if (skip) {
    addr += 1;
  }
}

/*
  calling a subroutine
*/
void doCall(byte data) {
  saveaddr[saveCnt] = addr;
  saveCnt++;
  addr = page + data;
}

/*
  calling a subroutine, calling return and restart
*/
void doCallSub(byte data) {
  if (data == 0) {
    if (saveCnt < 0) {
      doReset();
      return;
    }
    saveCnt -= 1;
    addr = saveaddr[saveCnt];
    dbgOut("r:");
    dbgOutLn(addr);
    return;
  }
#ifdef SPS_ENHANCEMENT
  if (data <= 7) {
    // call subroutine number
    doCall(addr);
    addr = subs[data - 1];
    dbgOut("c:");
    dbgOutLn(addr);
    return;
  }
  if (data == 0x0f) {
    doReset();
  }
#endif
}

/*
  calling a byte methods
*/
void doByte(byte data) {
#ifdef SPS_ENHANCEMENT
  dbgOut("B ");
  switch (data) {
    case 0:
      tmpValue = analogRead(ADC_0);
      a = tmpValue >> 2; //(Umrechnen auf 8 bit)
      break;
    case 1:
      tmpValue = analogRead(ADC_1);
      a = tmpValue >> 2; //(Umrechnen auf 8 bit)
      break;
#ifdef SPS_RCRECEIVER
    case 2:
      tmpValue = pulseIn(RC_0, HIGH, 100000);
      if (tmpValue < 1000) {
        tmpValue = 1000;
      }
      if (tmpValue > 2000) {
        tmpValue = 2000;
      }
      a = (tmpValue - 1000) / 4; //(Umrechnen auf 4 bit)
      dbgOut("RC1:");
      dbgOut(tmpValue);
      dbgOut("=");
      dbgOutLn(a);
      break;
    case 3:
      tmpValue = pulseIn(RC_1, HIGH, 100000);
      if (tmpValue < 1000) {
        tmpValue = 1000;
      }
      if (tmpValue > 2000) {
        tmpValue = 2000;
      }
      a = (tmpValue - 1000) / 4; //(Umrechnen auf 4 bit)
      dbgOut("RC2:");
      dbgOut(tmpValue);
      dbgOut("=");
      dbgOutLn(a);
      break;
#endif
    case 4:
      tmpValue = a;
      dbgOut("PWM1:");
      dbgOutLn(a);
      analogWrite(PWM_1, a);
      break;
    case 5:
      tmpValue = a;
      dbgOut("PWM2:");
      dbgOutLn(a);
      analogWrite(PWM_2, a);
      break;
#ifdef SPS_SERVO
    case 6:
      if (servo1.attached()) {
        dbgOut("Srv1:");
        tmpValue = map(a,0, 255,0,180);
        dbgOutLn(tmpValue);
        servo1.write(tmpValue);
      }
      break;
    case 7:
      if (servo2.attached()) {
        dbgOut("Srv2:");
        tmpValue = map(a,0, 255,0,180);
        dbgOutLn(tmpValue);
        servo2.write(tmpValue);
      }
      break;
#endif
#ifdef SPS_TONE
    case 8:
      if (a == 0) {
        dbgOutLn("Tone off");
        noTone(PWM_2);
      } else {
        if (between(a, MIDI_START, MIDI_START + MIDI_NOTES)) {
          word frequenz = pgm_read_word(a - MIDI_START + midiNoteToFreq);
          dbgOut("Tone on: midi ");
          dbgOut2(a, DEC);
          dbgOut(", ");
          dbgOut2(frequenz, DEC);
          dbgOutLn("Hz");
          tone(PWM_2, frequenz);
        }
      }
      break;
#endif
#ifdef __AVR_ATmega328P__
    case 13:
      digitalWrite(LED_BUILTIN, 0);
      break;
    case 14:
      digitalWrite(LED_BUILTIN, 1);
      break;
#endif
  }
#endif
}