forked from mic159/ArduinoMesh
/
MeshBase.cpp
156 lines (139 loc) · 3.31 KB
/
MeshBase.cpp
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#include <Arduino.h>
#include <RF24.h>
#include "MeshBase.h"
// -- Broadcast addresses --
#define PEER_DISCOVERY 1
// -- Helpers --
#define TO_BROADCAST(x) (0xBB00000000LL + x)
#define TO_ADDRESS(x) (0xAA00000000LL + x)
#define PEER_DISCOVERY_TIME 3000
#define PEER_CHECK_TIME 4000
#define PEER_TIMEOUT 2
MeshBase::MeshBase(uint8_t ce, uint8_t cs)
: radio(ce, cs)
, address(0)
, last_broadcast_time(0)
, last_peer_check_time(0)
{}
void MeshBase::Begin()
{
radio.begin();
radio.enableDynamicPayloads();
radio.setRetries(2,1);
//radio.openReadingPipe(0, TO_ADDRESS(address));
radio.openReadingPipe(1, TO_BROADCAST(PEER_DISCOVERY));
radio.setAutoAck(0, true);
radio.setAutoAck(1, false);
radio.startListening();
}
void MeshBase::Update()
{
// Periodic sends
if (millis() - last_broadcast_time > PEER_DISCOVERY_TIME)
{
if (!IsReady())
ChooseAddress();
SendPeerDiscovery();
}
// Recieve
uint8_t pipe_num;
if (radio.available(&pipe_num))
{
bool done = false;
do {
uint8_t len = radio.getDynamicPayloadSize();
uint8_t buff[40];
done = radio.read(buff, min(len, sizeof(buff)));
if (pipe_num == 0)
{
HandleMessage(0, buff, len);
} else if (pipe_num == 1) {
HandlePeerDiscovery(buff, len);
}
} while (!done);
}
// Update peers
if (millis() - last_peer_check_time > PEER_CHECK_TIME)
{
LinkedList<Peer>::Node* current = peers.first;
while(current != NULL)
{
current->item->time += 1;
if (current->item->time >= PEER_TIMEOUT)
{
Serial.print("Lost Peer: ");
Serial.println(current->item->address, DEC);
current = peers.Remove(current);
} else {
current = current->next;
}
}
last_peer_check_time = millis();
}
}
void MeshBase::HandlePeerDiscovery(void* buff, uint8_t length)
{
if (length != sizeof(PeerDiscoveryMessage))
return;
PeerDiscoveryMessage from = *(PeerDiscoveryMessage*)buff;
// Dont know why, but this keeps happening?
/*if (from == 0)
return;*/
Peer* peer = GetPeer(from.address);
if (peer == NULL)
{
// Found a new peer
Serial.print("New Peer: ");
Serial.println(from.address, DEC);
Peer* p = new Peer(from.address);
peers.Add(p);
OnNewPeer(p);
} else {
// Existing peer, reset timer
peer->time = 0;
}
}
void MeshBase::SendPeerDiscovery()
{
last_broadcast_time = millis();
MeshBase::PeerDiscoveryMessage msg;
msg.version = 1;
msg.address = address;
msg.num_peers = peers.length;
SendBroadcastMessage(PEER_DISCOVERY, &msg, sizeof(MeshBase::PeerDiscoveryMessage));
}
void MeshBase::SendBroadcastMessage(uint32_t to, const void* data, uint8_t length)
{
radio.stopListening();
radio.openWritingPipe(TO_BROADCAST(to));
radio.write(data, length);
radio.startListening();
}
void MeshBase::SendMessage(uint32_t to, const void* data, uint8_t length)
{
radio.stopListening();
radio.openWritingPipe(TO_ADDRESS(to));
radio.write(data, length);
radio.startListening();
}
void MeshBase::ChooseAddress()
{
do {
address = random(0xFFFF);
} while(GetPeer(address) != NULL);
radio.openReadingPipe(0, TO_ADDRESS(address));
Serial.print("Chose address: ");
Serial.println(address, DEC);
}
MeshBase::Peer* MeshBase::GetPeer(uint32_t a)
{
LinkedList<Peer>::Node* current = peers.first;
while(current != NULL)
{
if (current->item->address == a)
return current->item;
current = current->next;
}
// Could not find..
return NULL;
}