145 lines
4.7 KiB
Arduino
145 lines
4.7 KiB
Arduino
/*
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TMRh20 2014
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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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/** General Data Transfer Rate Test
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* This example demonstrates basic data transfer functionality with the
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updated library. This example will display the transfer rates acheived using
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the slower form of high-speed transfer using blocking-writes.
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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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/************* USER Configuration *****************************/
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// Hardware configuration
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RF24 radio(48,49); // Set up nRF24L01 radio on SPI bus plus pins 7 & 8
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boolean RADIO_NO = 0; //SET THIS TO 0 or 1 for 1st or 2nd radio
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/***************************************************************/
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const uint64_t pipes[2] = { 0xABCDABCD71LL, 0x544d52687CLL }; // Radio pipe addresses for the 2 nodes to communicate.
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byte data[32]; //Data buffer for testing data transfer speeds
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unsigned long counter, rxTimer; //Counter and timer for keeping track transfer info
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unsigned long startTime, stopTime;
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bool TX=1,RX=0,role=0;
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void setup(void) {
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Serial.begin(57600);
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printf_begin();
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radio.begin(); // Setup and configure rf radio
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radio.setChannel(1);
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radio.setPALevel(RF24_PA_MAX);
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radio.setDataRate(RF24_1MBPS);
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radio.setAutoAck(1); // Ensure autoACK is enabled
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radio.setRetries(2,15); // Optionally, increase the delay between retries & # of retries
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radio.setCRCLength(RF24_CRC_8);
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//radio.disableCRC();
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radio.openWritingPipe(pipes[0]);
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radio.openReadingPipe(1,pipes[1]);
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radio.startListening(); // Start listening
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radio.printDetails(); // Dump the configuration of the rf unit for debugging
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printf("\n\rRF24/examples/Transfer Rates/\n\r");
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printf("*** PRESS 'T' to begin transmitting to the other node\n\r");
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randomSeed(analogRead(0)); //Seed for random number generation
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for(int i=0; i<32; i++){
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data[i] = random(255); //Load the buffer with random data
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}
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radio.powerUp(); //Power up the radio
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}
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void loop(void){
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if(role == TX){
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delay(2000);
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printf("Initiating Basic Data Transfer\n\r");
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unsigned long cycles = 10000; //Change this to a higher or lower number.
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startTime = millis();
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for(int i=0; i<cycles; i++){ //Loop through a number of cycles
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data[0] = i; //Change the first byte of the payload for identification
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if(!radio.writeFast(&data,32)){ //Write to the FIFO buffers
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counter++; //Keep count of failed payloads
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}
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}
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stopTime = millis();
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//This should be called to wait for completion and put the radio in standby mode after transmission, returns 0 if data still in FIFO (timed out), 1 if success
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if(!radio.txStandBy()){ counter+=3; } //Standby, block only until FIFO empty or auto-retry timeout. Flush TX FIFO if failed
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//radio.txStandBy(1000); //Standby, using extended timeout period of 1 second
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float numBytes = cycles*32;
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float rate = numBytes / (stopTime - startTime);
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printf("Transfer complete at "); Serial.print(rate); printf(" KB/s \n\r");
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printf("%d of ",counter); Serial.print(cycles); printf(" Packets Failed to Send\n\r");
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counter = 0;
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}
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if(role == RX){
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while(radio.available()){
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radio.read(&data,32);
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counter++;
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}
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if(millis() - rxTimer > 1000){
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rxTimer = millis();
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printf("Rate: ");
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float numBytes = counter*32;
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Serial.print(numBytes/1000);
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printf(" KB/s\n\r");
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printf("Payload Count: %d \n\r", counter);
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counter = 0;
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}
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}
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//
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// Change roles
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//
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if ( Serial.available() )
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{
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char c = toupper(Serial.read());
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if ( c == 'T' && role == RX )
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{
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printf("*** CHANGING TO TRANSMIT ROLE -- PRESS 'R' TO SWITCH BACK\n\r");
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radio.openWritingPipe(pipes[1]);
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radio.openReadingPipe(1,pipes[0]);
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radio.stopListening();
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role = TX; // Become the primary transmitter (ping out)
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}
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else if ( c == 'R' && role == TX )
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{
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radio.openWritingPipe(pipes[0]);
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radio.openReadingPipe(1,pipes[1]);
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radio.startListening();
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printf("*** CHANGING TO RECEIVE ROLE -- PRESS 'T' TO SWITCH BACK\n\r");
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role = RX; // Become the primary receiver (pong back)
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}
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}
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}
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// vim:cin:ai:sts=2 sw=2 ft=cpp
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