TMRh20
2406e06a77
Added support for hardware SPI on RPI per jscrane fork: - Fixed a few bugs with single SPI transfers - Aligned with optimized RF24 library fork - Updated bmc2835 files per http://www.airspayce.com/mikem/bcm2835/index.html - Merged bcm files with changes from https://github.com/farconada/RF24Network - Added example files - Added setup info to readme
149 lines
3.9 KiB
C++
149 lines
3.9 KiB
C++
/*
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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 <cstdlib>
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#include <iostream>
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#include <sstream>
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#include <string>
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#include "./RF24.h"
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using namespace std;
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//
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// Hardware configuration
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//
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// CE Pin, CSN Pin, SPI Speed
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// Setup for GPIO 22 CE and GPIO 25 CSN with SPI Speed @ 1Mhz
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//RF24 radio(RPI_V2_GPIO_P1_22, RPI_V2_GPIO_P1_18, BCM2835_SPI_SPEED_1MHZ);
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// Setup for GPIO 22 CE and CE0 CSN with SPI Speed @ 4Mhz
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//RF24 radio(RPI_V2_GPIO_P1_15, BCM2835_SPI_CS0, BCM2835_SPI_SPEED_4MHZ);
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// Setup for GPIO 22 CE and CE1 CSN with SPI Speed @ 8Mhz
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RF24 radio(RPI_V2_GPIO_P1_15, RPI_V2_GPIO_P1_26, BCM2835_SPI_SPEED_8MHZ);
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// Radio pipe addresses for the 2 nodes to communicate.
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const uint64_t addresses[2] = { 0xABCDABCD71LL, 0x544d52687CLL };
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bool role_ping_out = 1, role_pong_back = 0;
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bool role = 0;
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uint8_t data[32];
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unsigned long startTime, stopTime, counter, rxTimer=0;
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int main(int argc, char** argv){
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// Print preamble:
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printf("RF24/examples/Transfer/\n");
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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_2MBPS);
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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.printDetails();
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/********* Role chooser ***********/
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printf("\n ************ Role Setup ***********\n");
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string input = "";
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char myChar = {0};
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cout << "Choose a role: Enter 0 for receiver, 1 for transmitter (CTRL+C to exit)\n>";
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getline(cin,input);
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if(input.length() == 1) {
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myChar = input[0];
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if(myChar == '0'){
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cout << "Role: Pong Back, awaiting transmission " << endl << endl;
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}else{ cout << "Role: Ping Out, starting transmission " << endl << endl;
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role = role_ping_out;
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}
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}
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/***********************************/
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if ( role == role_ping_out ) {
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radio.openWritingPipe(addresses[0]);
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radio.openReadingPipe(1,addresses[1]);
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} else {
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radio.openWritingPipe(addresses[1]);
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radio.openReadingPipe(1,addresses[0]);
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radio.startListening();
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}
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for(int i=0; i<32; i++){
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data[i] = rand() % 255; //Load the buffer with random data
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}
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// forever loop
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while (1){
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if (role == role_ping_out){
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sleep(2);
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printf("Initiating Basic Data Transfer\n\r");
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long int 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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if(!radio.txStandBy()){ counter+=3; }
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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 %.2f KB/s \n\r",rate);
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printf("%lu of %lu Packets Failed to Send\n\r",counter,cycles);
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counter = 0;
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}
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if(role == role_pong_back){
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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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printf("%.2f KB/s \n\r",numBytes/1000);
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printf("Payload Count: %lu \n\r", counter);
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counter = 0;
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}
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}
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} // loop
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} // main
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