155 lines
3.1 KiB
C++
155 lines
3.1 KiB
C++
/*
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Copyright (C) 2011 J. Coliz <maniacbug@ymail.com>
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Updated 2020 TMRh20
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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 and Continuous Carrier Wave Output
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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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* Run this sketch on two devices. On one device, start CCW output by sending a 'g'
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* character over Serial. The other device scanning should detect the output of the sending
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* device on the given channel. Adjust channel and output power of CCW below.
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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 "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 7 & 8
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RF24 radio(7,8);
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//
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// Channel info
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//
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const uint8_t num_channels = 126;
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uint8_t 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(115200);
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printf_begin();
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Serial.println(F("\n\rRF24/examples/scanner/"));
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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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radio.printDetails();
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//delay(1000);
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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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Serial.print(i>>4,HEX);
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++i;
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}
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Serial.println();
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i = 0;
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while ( i < num_channels )
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{
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Serial.print(i&0xf,HEX);
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++i;
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}
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Serial.println();
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//delay(1000);
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}
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//
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// Loop
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//
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const int num_reps = 100;
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bool constCarrierMode = 0;
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void loop(void)
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{
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/****************************************/
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// Send g over Serial to begin CCW output
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// Configure the channel and power level below
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if(Serial.available()){
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char c = Serial.read();
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if(c == 'g'){
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constCarrierMode = 1;
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radio.stopListening();
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delay(2);
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Serial.println("Starting Carrier Out");
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radio.startConstCarrier(RF24_PA_LOW,40);
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}else
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if(c == 'e'){
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constCarrierMode = 0;
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radio.stopConstCarrier();
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Serial.println("Stopping Carrier Out");
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}
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}
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/****************************************/
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if(constCarrierMode == 0){
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// Clear measurement values
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memset(values,0,sizeof(values));
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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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}
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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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Serial.print(min(0xf,values[i]),HEX);
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++i;
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}
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Serial.println();
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}//If constCarrierMode == 0
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}
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