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Dependencies:   xtoff2 RF24Network mbed

Fork of RF24Network_Receive by Akash Vibhute

RF24Network/Sync.cpp@0:3982c0e9eda1, 2015-07-06 (annotated)

Committer:
akashvibhute
Date:
Mon Jul 06 03:17:33 2015 +0000
Revision:
0:3982c0e9eda1
First mbed-arduino working program!; mbed is able to receive data from arduino nodes 0 or 1 depending on address set

Who changed what in which revision?

UserRevisionLine numberNew contents of line
akashvibhute 0:3982c0e9eda1 1 /*
akashvibhute 0:3982c0e9eda1 2 Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
akashvibhute 0:3982c0e9eda1 3
akashvibhute 0:3982c0e9eda1 4 This program is free software; you can redistribute it and/or
akashvibhute 0:3982c0e9eda1 5 modify it under the terms of the GNU General Public License
akashvibhute 0:3982c0e9eda1 6 version 2 as published by the Free Software Foundation.
akashvibhute 0:3982c0e9eda1 7 */
akashvibhute 0:3982c0e9eda1 8
akashvibhute 0:3982c0e9eda1 9 // STL headers
akashvibhute 0:3982c0e9eda1 10 // C headers
akashvibhute 0:3982c0e9eda1 11 #include <stdlib.h>
akashvibhute 0:3982c0e9eda1 12 // Framework headers
akashvibhute 0:3982c0e9eda1 13 // Library headers
akashvibhute 0:3982c0e9eda1 14 #include <RF24Network.h>
akashvibhute 0:3982c0e9eda1 15 // Project headers
akashvibhute 0:3982c0e9eda1 16 // This component's header
akashvibhute 0:3982c0e9eda1 17 #include <Sync.h>
akashvibhute 0:3982c0e9eda1 18
akashvibhute 0:3982c0e9eda1 19 /****************************************************************************/
akashvibhute 0:3982c0e9eda1 20
akashvibhute 0:3982c0e9eda1 21 void Sync::update(void)
akashvibhute 0:3982c0e9eda1 22 {
akashvibhute 0:3982c0e9eda1 23 // Pump the network
akashvibhute 0:3982c0e9eda1 24 network.update();
akashvibhute 0:3982c0e9eda1 25
akashvibhute 0:3982c0e9eda1 26 // Look for changes to the data
akashvibhute 0:3982c0e9eda1 27 uint8_t message[32];
akashvibhute 0:3982c0e9eda1 28 uint8_t *mptr = message;
akashvibhute 0:3982c0e9eda1 29 unsigned at = 0;
akashvibhute 0:3982c0e9eda1 30 while ( at < len )
akashvibhute 0:3982c0e9eda1 31 {
akashvibhute 0:3982c0e9eda1 32 if ( app_data && internal_data && app_data[at] != internal_data[at] )
akashvibhute 0:3982c0e9eda1 33 {
akashvibhute 0:3982c0e9eda1 34 // Compose a message with the deltas
akashvibhute 0:3982c0e9eda1 35 *mptr++ = at + 1;
akashvibhute 0:3982c0e9eda1 36 *mptr++ = app_data[at];
akashvibhute 0:3982c0e9eda1 37
akashvibhute 0:3982c0e9eda1 38 // Update our internal view
akashvibhute 0:3982c0e9eda1 39 internal_data[at] = app_data[at];
akashvibhute 0:3982c0e9eda1 40 }
akashvibhute 0:3982c0e9eda1 41 ++at;
akashvibhute 0:3982c0e9eda1 42 }
akashvibhute 0:3982c0e9eda1 43 // Zero out the remainder
akashvibhute 0:3982c0e9eda1 44 while ( at++ < sizeof(message) )
akashvibhute 0:3982c0e9eda1 45 *mptr++ = 0;
akashvibhute 0:3982c0e9eda1 46
akashvibhute 0:3982c0e9eda1 47 // If changes, send a message
akashvibhute 0:3982c0e9eda1 48 if ( *message )
akashvibhute 0:3982c0e9eda1 49 {
akashvibhute 0:3982c0e9eda1 50 // TODO handle the case where this has to be broken into
akashvibhute 0:3982c0e9eda1 51 // multiple messages
akashvibhute 0:3982c0e9eda1 52 RF24NetworkHeader header(/*to node*/ to_node, /*type*/ 'S' /*Sync*/);
akashvibhute 0:3982c0e9eda1 53 network.write(header,message,sizeof(message));
akashvibhute 0:3982c0e9eda1 54 }
akashvibhute 0:3982c0e9eda1 55
akashvibhute 0:3982c0e9eda1 56 // Look for messages from the network
akashvibhute 0:3982c0e9eda1 57 // Is there anything ready for us?
akashvibhute 0:3982c0e9eda1 58 if ( network.available() )
akashvibhute 0:3982c0e9eda1 59 {
akashvibhute 0:3982c0e9eda1 60 // If so, take a look at it
akashvibhute 0:3982c0e9eda1 61 RF24NetworkHeader header;
akashvibhute 0:3982c0e9eda1 62 network.peek(header);
akashvibhute 0:3982c0e9eda1 63
akashvibhute 0:3982c0e9eda1 64 switch (header.type)
akashvibhute 0:3982c0e9eda1 65 {
akashvibhute 0:3982c0e9eda1 66 case 'S':
akashvibhute 0:3982c0e9eda1 67 //IF_SERIAL_DEBUG(printf_P(PSTR("%lu: SYN Received sync message\n\r"),millis()));
akashvibhute 0:3982c0e9eda1 68
akashvibhute 0:3982c0e9eda1 69 network.read(header,&message,sizeof(message));
akashvibhute 0:3982c0e9eda1 70 // Parse the message and update the vars
akashvibhute 0:3982c0e9eda1 71 mptr = message;
akashvibhute 0:3982c0e9eda1 72 at = 0;
akashvibhute 0:3982c0e9eda1 73 while ( mptr < message + sizeof(message) )
akashvibhute 0:3982c0e9eda1 74 {
akashvibhute 0:3982c0e9eda1 75 // A '0' in the first position means we are done
akashvibhute 0:3982c0e9eda1 76 if ( !*mptr )
akashvibhute 0:3982c0e9eda1 77 break;
akashvibhute 0:3982c0e9eda1 78 uint8_t pos = (*mptr++) - 1;
akashvibhute 0:3982c0e9eda1 79 uint8_t val = *mptr++;
akashvibhute 0:3982c0e9eda1 80
akashvibhute 0:3982c0e9eda1 81 //IF_SERIAL_DEBUG(printf_P(PSTR("%lu: SYN Updated position %u to value %u\n\r"),millis(),pos,val));
akashvibhute 0:3982c0e9eda1 82
akashvibhute 0:3982c0e9eda1 83 app_data[pos] = val;
akashvibhute 0:3982c0e9eda1 84 internal_data[pos] = val;
akashvibhute 0:3982c0e9eda1 85 }
akashvibhute 0:3982c0e9eda1 86 break;
akashvibhute 0:3982c0e9eda1 87 default:
akashvibhute 0:3982c0e9eda1 88 // Leave other messages for the app
akashvibhute 0:3982c0e9eda1 89 break;
akashvibhute 0:3982c0e9eda1 90 };
akashvibhute 0:3982c0e9eda1 91 }
akashvibhute 0:3982c0e9eda1 92 }
akashvibhute 0:3982c0e9eda1 93 // vim:cin:ai:sts=2 sw=2 ft=cpp