keycatfsm.ino

#include <Keypad.h>

#define KEY_POUND 0x21;
#define KEY_STAR 0x20;
#define OPCODE_SETFREQ 0x01;


#define MENU_SELECT 0;
#define FREQUENCY_INPUT 1;
#define TONE_INPUT 2;
#define OPCODE_SEND 3;

//TODO sort the decimal handling for MHz and Hz inputs
// decimal handling may prepend padding to buffers if the buffer's size is less than three
// decimal handling must fail if the buffer's size is more than three
// decimal handling for tones must fail if the buffer's size is less than two

void setup()
{
  //Set up serial port, LED pin, and inactivity timer
  //Can I set up the keypad in here too?
}



void menu_select(byte key)
{
  if (key < 0x11)
  {
    input_state = FREQUENCY_INPUT;
    //add key to buffer
    frequency_input(key);
  }
  else
  {
    input_state = TONE_INPUT;
    //add key to buffer
    tone_input(key);
  }
}

void frequency_input(byte key)
{
  //if key is pound:
    //opcode_send(frequency);
  //if key is star:
    //if star is in buffer:
      //clear buffer
      //input_state = MENU_SELECT;
    //else
      //add decimal
  //if key is number:
    //add key to buffer;
    //if buffer is full;
      //opcode_send(frequency);
}

void tone_input(byte key)
{
  //if first input is # then tone flag is DECODER if first input is * then tone flag is ENCODER
  //if buffer length is 1:
    //if # is in buffer:
      //TONE_FLAG = DECODE;
    //if * is in buffer:
      //TONE_FLAG = ENCODE;
  //else:  actually this neglects the possibility that the user may enter **
    //TODO sort the doublestar problem
    //if key is pound:
      //opcode_send(tone);
    //if key is star:
      //if * is in buffer:
        //clear buffer;
        //input_state = MENU_SELECT;
      //else
        //add decimal
    //else:
      //add key to buffer;
      //if buffer is full:
        //opcode_send(tone);
}

void opcode_send() // should accept buffer; forms instruction from complete buffer and returns to start
{
  //magically forms instruction
  //magically sends instruction
  //magically clears the buffers and unsets the tone flags
  input_state = MENU_SELECT;
}


void loop()
{
  if key()
  {
    //let's react to key input based on state:
    switch (input_state)
    {
      case MENU_SELECT:
        //Reset buffers and prepare for any key input
        //do i call a function to process the key input, or do i process it here?
        menu_select(key);
        break;
      case FREQUENCY_INPUT:
        //Prepare for any key input
        frequency_input(key);
        break;
      case TONE_INPUT:
        //Maintain buffer; prepare for any key input
        tone_input(key);
        break;
      case TONE_SET:
        //user is attempting to enable or disable a tone feature
        //TODO make Keypad function for TONE_SET hold-down events
        tone_set(key);
      case OPCODE_SEND:
        //system is busy sending opcode.
        break;
    }
  }
}