58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
#ifndef _PROTOCOL_H_
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#define _PROTOCOL_H_
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#include <Wire.h>
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#define DISCOVER_TTL 10000
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// discover request (c.f. class node)
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#define DISCOVER_SIZE sizeof(uint8_t)*3 + 1
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struct discover {
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uint8_t opcode; // opcode = 0
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uint8_t wave; // id de la wave
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uint8_t dist; // current node's distance
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};
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#define MESSAGE_MIN_SIZE sizeof(uint8_t)*4 + 1
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#define MESSAGE_MAX_SIZE sizeof(uint8_t)*4+sizeof(uint8_t)*255 + 1
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struct message {
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uint8_t opcode; // opcode = 1
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uint8_t dist; // distance of the last sender
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uint8_t ttl; // time to live default = 10
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uint8_t size; // size of message in bytes
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uint8_t data[]; // actual message
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};
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#define PROTO_SIZE MESSAGE_MAX_SIZE
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// A <node> object is held by each node which values are determined thanks
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// to the DISCOVER requests it receives; each node broadcasts a DISCOVER
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// request every DISCOVER_TTL milliseconds
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// class node{
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// private:
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// // unique id of the node : MAC ADDR
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// int id;
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// // last received wave id
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// uint8_t last_wave;
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// // relative node-distance to the well
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// // WELL : dist = 0
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// // NODE1 can reach WELL : dist = 1
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// // NODE2 can reach NODE1 : dist = 2
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// // and so on...
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// uint8_t dist;
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// public:
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// // send a discover request
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// bool discover();
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// // update the current node according to a (received)
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// // discover request
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// bool update(struct discover dsc);
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// };
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#endif |