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/*-O//\ __ __
|-gfo\ |__| | | | |\ |
|!y°o:\ | __| |__| | \| v1.0
|y"s§+`\ Giovanni Blu Mitolo 2012 - 2015
/so+:-..`\ gioscarab@gmail.com
|+/:ngr-*.`\
|5/:%&-a3f.:;\ PJON_ASK is a device communications bus system that connects up to 255
\+//u/+g%{osv,,\ arduino boards over one wire up to 5.29kB/s data communication speed.
\=+&/osw+olds.\\ Contains acknowledge, collision detection, CRC and encpryption all done
\:/+-.-°-:+oss\ with micros() and delayMicroseconds(), with no use of interrupts or timers.
| | \oy\\ Pull down resistor on the bus is generally used to reduce interference.
> <
_____-| |-________________________________________________________________________
| BIT_WIDTH 512 | BIT_SPACER 328 | |
|----------------------------------------------------------------------------------|
|Transfer speed: 202 B/s | Absolute bandwidth: 202 B/s |
|Baud rate: 1620 baud | Data throughput: 150 B/s |
|__________________________________________________________________________________|
Copyright (c) 2012-2015, Giovanni Blu Mitolo All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes PJON_ASK software developed by Giovanni Blu Mitolo.
- Neither the name of PJON, PJON_ASK nor the
names of its contributors may be used to endorse or promote products
derived from this software without specific prior written permission.
This software is provided by the copyright holders and contributors "as is" and any express or implied warranties, including,
but not limited to, the implied warranties of merchantability and fitness for a particular purpose are disclaimed. In no event
shall the copyright holder or contributors be liable for any direct, indirect, incidental, special, exemplary, or consequential
damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business
interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence
or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage. */
#ifndef PJON_ASK_h
#define PJON_ASK_h
#include "includes/digitalWriteFast.h"
#include "Arduino.h"
/* The following constants setup is quite conservative and determined only
with a huge amount of time and blind testing (without oscilloscope)
tweaking values and analysing results. Theese can be changed to obtain
faster speed. Probably you need experience, time and an oscilloscope. */
#define BIT_WIDTH 512
#define BIT_SPACER 328
#endif
#define ACK 6
#define NAK 21
#define FAIL 0x100
#define BUSY 666
#define BROADCAST 124
#define TO_BE_SENT 74
#define NOT_USED 9999
// Errors
#define CONNECTION_LOST 101
#define PACKETS_BUFFER_FULL 102
#define MEMORY_FULL 103
#define CONTENT_TOO_LONG 104
// Maximum sending attempts before throwing CONNECTON_LOST error
#define MAX_ATTEMPTS 250
// Packets buffer length, if full PACKET_BUFFER_FULL error is thrown
#define MAX_PACKETS 10
// Max packet length, higher if necessary (affects memory)
#define PACKET_MAX_LENGTH 50
struct packet {
uint8_t attempts;
uint8_t device_id;
char *content;
uint8_t length;
unsigned long registration;
int state;
unsigned long timing;
};
typedef void (* receiver)(uint8_t length, uint8_t *payload);
typedef void (* error)(uint8_t code, uint8_t data);
static void dummy_error_handler(uint8_t code, uint8_t data) {};
static void dummy_receiver_handler(uint8_t length, uint8_t *payload) {};
class PJON_ASK {
public:
PJON_ASK(uint8_t input_pin, uint8_t output_pin, uint8_t device_id);
PJON_ASK(uint8_t input_pin, uint8_t output_pin);
void initialize(uint8_t input_pin, uint8_t output_pin);
void set_id(uint8_t id);
void set_receiver(receiver r);
void set_error(error e);
int receive_byte();
int receive();
int receive(unsigned long duration);
void send_bit(uint8_t VALUE, int duration);
void send_byte(uint8_t b);
int send_string(uint8_t ID, char *string, uint8_t length);
int send(uint8_t ID, char *packet, uint8_t length, unsigned long timing = 0);
void update();
void remove(int id);
uint8_t read_byte();
boolean can_start();
uint8_t data[PACKET_MAX_LENGTH];
packet packets[MAX_PACKETS];
private:
uint8_t _device_id;
int _input_pin;
int _output_pin;
boolean _simplex;
receiver _receiver;
error _error;
};