129 lines
2.1 KiB
C++
129 lines
2.1 KiB
C++
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#include <WProgram.h>
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#line 1 "scanner.pde"
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/*
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Copyright (C) 2011 James Coliz, Jr. <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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* Channel scanner
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*
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* Example to detect interference on the various channels available.
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* This is a good diagnostic tool to check whether you're picking a
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* good channel for your application.
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*
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* Inspired by cpixip.
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* See http://arduino.cc/forum/index.php/topic,54795.0.html
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*/
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#include <SPI.h>
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#include "nRF24L01.h"
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#include "RF24.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 8 & 9
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RF24 radio(8,9);
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//
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// Channel info
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//
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const short num_channels = 128;
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short values[num_channels];
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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("\n\rRF24/examples/scanner/\n\r");
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//
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// Setup and configure rf radio
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//
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radio.begin();
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radio.setAutoAck(false);
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// Get into standby mode
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radio.startListening();
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radio.stopListening();
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// Print out header, high then low digit
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int i = 0;
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while ( i < num_channels )
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{
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printf("%x",i>>4);
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++i;
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}
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printf("\n\r");
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i = 0;
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while ( i < num_channels )
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{
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printf("%x",i&0xf);
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++i;
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}
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printf("\n\r");
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}
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//
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// Loop
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//
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const short num_reps = 100;
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void loop(void)
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{
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// Clear measurement values
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memset(values,0,num_channels);
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// Scan all channels num_reps times
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int rep_counter = num_reps;
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while (rep_counter--)
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{
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int i = num_channels;
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while (i--)
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{
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// Select this channel
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radio.setChannel(i);
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// Listen for a little
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radio.startListening();
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delayMicroseconds(128);
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radio.stopListening();
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// Did we get a carrier?
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if ( radio.testCarrier() )
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++values[i];
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}
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}
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// Print out channel measurements, clamped to a single hex digit
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int i = 0;
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while ( i < num_channels )
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{
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printf("%x",min(0xf,values[i]&0xf));
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++i;
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}
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printf("\n\r");
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}
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// vim:ai:cin:sts=2 sw=2 ft=cpp
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