Talkie.h

// Talkie library
// Copyright 2011 Peter Knight
// This code is released under GPLv2 license.

#ifndef _Talkie_h_
#define _Talkie_h_

#include <inttypes.h>


#define SAY_BUFFER_SIZE     24	// 24 sets of 4 bytes plus added queue indexes is about 100 added bytes.

class Talkie
{
public:
	void say(const uint8_t * address);
	int8_t sayQ(const uint8_t * address);
	const uint8_t * ptrAddr;
	uint8_t ptrBit;
	uint8_t active( void );
	uint8_t getBits(uint8_t bits);
	bool setPtr(const uint8_t * addr);
	bool say_add( const uint8_t *addr );	// sayisr() calls this
	const uint8_t * say_remove();	// sayisr() calls this
private:
	// Say queue
	 const uint8_t *  say_buffer[SAY_BUFFER_SIZE];
	volatile uint8_t head; // init on setup = 0
	volatile uint8_t tail; // init on setup = 0
	volatile uint8_t free; // init on setup = SAY_BUFFER_SIZE
	
	// Setup
	uint8_t setup;
	
	// Bitstream parser
	uint8_t rev(uint8_t a);
};


#endif