RF24Network.h

Go to the documentation of this file.

/*
 Copyright (C) 2011 James Coliz, Jr. <maniacbug@ymail.com>

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 version 2 as published by the Free Software Foundation.
 */

#ifndef __RF24NETWORK_H__
#define __RF24NETWORK_H__

#include <stddef.h>
#include <stdint.h>

class RF24;

struct RF24NetworkHeader
{
  uint16_t from_node; 
  uint16_t to_node; 
  uint16_t id; 
  unsigned char type; 
  unsigned char reserved; 
  static uint16_t next_id; 
  RF24NetworkHeader() {}

  RF24NetworkHeader(uint16_t _to, unsigned char _type = 0): to_node(_to), id(next_id++), type(_type&0x7f) {}

  const char* toString(void) const;
};

class RF24Network
{
public:
  RF24Network( RF24& _radio );

  void begin(uint8_t _channel, uint16_t _node_address );
  
  void update(void);

  bool available(void);
 
  void peek(RF24NetworkHeader& header);

  size_t read(RF24NetworkHeader& header, void* message, size_t maxlen);
  
  bool write(RF24NetworkHeader& header,const void* message, size_t len);

protected:
  void open_pipes(void);
  uint16_t find_node( uint16_t current_node, uint16_t target_node );
  bool write(uint16_t);
  bool write_to_pipe( uint16_t node, uint8_t pipe );
  bool enqueue(void);

  bool is_direct_child( uint16_t node );
  bool is_descendant( uint16_t node );
  uint16_t direct_child_route_to( uint16_t node );
  uint8_t pipe_to_descendant( uint16_t node );
  void setup_address(void);

private:
  RF24& radio; 
  uint16_t node_address; 
  uint16_t num_nodes; 
  const static short frame_size = 32; 
  uint8_t frame_buffer[frame_size]; 
  uint8_t frame_queue[5*frame_size]; 
  uint8_t* next_frame; 
  uint16_t parent_node; 
  uint8_t parent_pipe; 
  uint16_t node_mask; 
};

#endif // __RF24NETWORK_H__
// vim:ai:cin:sts=2 sw=2 ft=cpp