/* -*- C++ -*- */

/**************

Sept. 2014 Rui Azevedo - ruihfazevedo(@rrob@)gmail.com

Oct. 2016 - dontsovcmc (https://github.com/dontsovcmc) added debounce safe

https://github.com/neu-rah/ArduinoMenu/pull/60

quick and dirty keyboard driver

metaprog keyboard driver where N is the number of keys

all keys are expected to be a pin (buttons)

we can have reverse logic (pull-ups) by entering negative pin numbers

ex: -A0 means: pin A0 normally high, low when button pushed (reverse logic)

***/

#ifndef __softKeyIn_h__

#define __softKeyIn_h__

#include "../menuDefs.h"

namespace Menu {

#include "keyMapDef.h"

#ifndef BOUNCE_TICK

#define BOUNCE_TICK 30

#endif

//if you hold/repeat a key for this ammount of time we will consider it an escape

#ifndef ESCAPE_TIME

#define ESCAPE_TIME 1500

#endif

//emulate a stream keyboard, this is not using interrupts as a good driver should do

// AND is not using a buffer either!

template <int N>

class softKeyIn:public menuIn {

public:

keyMap* keys;

int lastkey;

unsigned long pressMills=0;

softKeyIn<N>(keyMap k[]):keys(k),lastkey(-1) {}

int available(void) {

int ch=peek();

if (lastkey==-1) {

lastkey=ch;

pressMills=millis();

}

else if (ch == -1 && millis()-pressMills < BOUNCE_TICK)

{

lastkey = -1; //released = it's bounce. reset lastkey

return 0;

}

else if (ch != -1 && millis()-pressMills > BOUNCE_TICK) return 1;

else if (ESCAPE_TIME&&millis()-pressMills>ESCAPE_TIME) return 1;

if (ch==lastkey) return 0;

return 1;

/*int cnt=0;

for(int n=0;n<N;n++) {

int8_t pin=keys[n].pin;

if (digitalRead(pin<0?-pin:pin)!=(pin<0) ) cnt++;

}

return cnt;*/

}

int peek(void) {

//MENU_DEBUG_OUT<<"peek"<<endl;

for(int n=0;n<N;n++) {

int8_t pin=keys[n].pin;

if (digitalRead(pin<0?-pin:pin)!=(pin<0) ) return keys[n].code;

}

return -1;

}

int read() {

//MENU_DEBUG_OUT<<"read"<<endl;

int ch=peek();

if (ch==lastkey) return -1;

int tmp=lastkey;

bool longPress=ESCAPE_TIME&&millis()-pressMills>ESCAPE_TIME;

//MENU_DEBUG_OUT<<"read lastkey="<<lastkey<<" ch="<<ch<<endl;

//MENU_DEBUG_OUT<<"down time:"<<millis()-pressMills<<endl;

pressMills=millis();

lastkey=ch;

return longPress?options->getCmdChar(escCmd):tmp;//long press will result in escape

}

void flush() {}

size_t write(uint8_t v) {return 0;}

};

}//namespace Menu

#endif