142 lines
2.4 KiB
Plaintext
142 lines
2.4 KiB
Plaintext
/*
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Copyright (C) 2012 J. Coliz <maniacbug@ymail.com>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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version 2 as published by the Free Software Foundation.
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*/
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/**
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* Example Nordic FOB Receiver
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*
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* This is an example of how to use the RF24 class to receive signals from the
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* Sparkfun Nordic FOB. See http://www.sparkfun.com/products/8602 .
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* Thanks to Kirk Mower for providing test hardware.
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*/
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#include <SPI.h>
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#include <RF24.h>
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#include "nRF24L01.h"
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#include "printf.h"
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//
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// Hardware configuration
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//
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// Set up nRF24L01 radio on SPI bus plus pins 9 & 10
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RF24 radio(9,10);
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//
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// Payload
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//
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struct payload_t
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{
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uint8_t buttons;
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uint16_t id;
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uint8_t empty;
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};
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const char* button_names[] = { "Up", "Down", "Left", "Right", "Center" };
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const int num_buttons = 5;
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//
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// Forward declarations
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//
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uint16_t flip_endian(uint16_t in);
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//
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// Setup
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//
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void setup(void)
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{
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//
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// Print preamble
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//
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Serial.begin(57600);
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printf_begin();
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printf("\r\nRF24/examples/nordic_fob/\r\n");
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//
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// Setup and configure rf radio according to the built-in parameters
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// of the FOB.
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//
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radio.begin();
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radio.setChannel(2);
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radio.setPayloadSize(4);
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radio.setAutoAck(false);
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radio.setCRCLength(RF24_CRC_8);
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radio.openReadingPipe(1,0xE7E7E7E7E7LL);
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//
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// Start listening
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//
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radio.startListening();
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//
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// Dump the configuration of the rf unit for debugging
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//
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radio.printDetails();
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}
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//
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// Loop
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//
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void loop(void)
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{
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//
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// Receive each packet, dump it out
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//
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// if there is data ready
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if ( radio.available() )
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{
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// Get the packet from the radio
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payload_t payload;
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radio.read( &payload, sizeof(payload) );
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// Print the ID of this message. Note that the message
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// is sent 'big-endian', so we have to flip it.
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printf("#%05u Buttons ",flip_endian(payload.id));
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// Print the name of each button
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int i = num_buttons;
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while (i--)
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{
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if ( ! ( payload.buttons & _BV(i) ) )
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{
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printf("%s ",button_names[i]);
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}
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}
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// If no buttons, print None
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if ( payload.buttons == _BV(num_buttons) - 1 )
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printf("None");
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printf("\r\n");
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}
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}
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//
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// Helper functions
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//
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// Change a big-endian word into a little-endian
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uint16_t flip_endian(uint16_t in)
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{
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uint16_t low = in >> 8;
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uint16_t high = in << 8;
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return high | low;
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}
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// vim:cin:ai:sts=2 sw=2 ft=cpp
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