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arduino-cli/libraries/RF24/examples_linux/transfer.cpp

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+/*
+TMRh20 2014
+
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ version 2 as published by the Free Software Foundation.
+ */
+
+/** General Data Transfer Rate Test
+ * This example demonstrates basic data transfer functionality with the
+ updated library. This example will display the transfer rates acheived using
+ the slower form of high-speed transfer using blocking-writes.
+ */
+
+#include <cstdlib>
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <RF24/RF24.h>
+#include <unistd.h>
+
+using namespace std;
+//
+// Hardware configuration
+//
+
+/****************** Linux ***********************/
+// Radio CE Pin, CSN Pin, SPI Speed
+// CE Pin uses GPIO number with BCM and SPIDEV drivers, other platforms use their own pin numbering
+// CS Pin addresses the SPI bus number at /dev/spidev<a>.<b>
+// ie: RF24 radio(<ce_pin>, <a>*10+<b>); spidev1.0 is 10, spidev1.1 is 11 etc..
+
+// Generic:
+RF24 radio(22,0);
+
+/****************** Linux (BBB,x86,etc) ***********************/
+// See http://tmrh20.github.io/RF24/pages.html for more information on usage
+// See http://iotdk.intel.com/docs/master/mraa/ for more information on MRAA
+// See https://www.kernel.org/doc/Documentation/spi/spidev for more information on SPIDEV
+
+/**************************************************************/
+
+// Radio pipe addresses for the 2 nodes to communicate.
+const uint64_t addresses[2] = {0xABCDABCD71LL, 0x544d52687CLL};
+
+uint8_t data[32];
+unsigned long startTime, stopTime, counter, rxTimer = 0;
+
+int main(int argc, char** argv)
+{
+
+    bool role_ping_out = 1, role_pong_back = 0;
+    bool role = 0;
+
+    // Print preamble:
+
+    cout << "RF24/examples/Transfer/\n";
+
+    radio.begin();                           // Setup and configure rf radio
+    radio.setChannel(1);
+    radio.setPALevel(RF24_PA_MAX);
+    radio.setDataRate(RF24_1MBPS);
+    radio.setAutoAck(1);                     // Ensure autoACK is enabled
+    radio.setRetries(2, 15);                  // Optionally, increase the delay between retries & # of retries
+    radio.setCRCLength(RF24_CRC_8);          // Use 8-bit CRC for performance
+    radio.printDetails();
+    /********* Role chooser ***********/
+
+    printf("\n ************ Role Setup ***********\n");
+    string input = "";
+    char myChar = {0};
+    cout << "Choose a role: Enter 0 for receiver, 1 for transmitter (CTRL+C to exit)\n>";
+    getline(cin, input);
+
+    if (input.length() == 1) {
+        myChar = input[0];
+        if (myChar == '0') {
+            cout << "Role: Pong Back, awaiting transmission " << endl << endl;
+        } else {
+            cout << "Role: Ping Out, starting transmission " << endl << endl;
+            role = role_ping_out;
+        }
+    }
+    /***********************************/
+
+    if (role == role_ping_out) {
+        radio.openWritingPipe(addresses[1]);
+        radio.openReadingPipe(1, addresses[0]);
+        radio.stopListening();
+    } else {
+        radio.openWritingPipe(addresses[0]);
+        radio.openReadingPipe(1, addresses[1]);
+        radio.startListening();
+    }
+
+    for (int i = 0; i < 32; i++) {
+        data[i] = rand() % 255;                        //Load the buffer with random data
+    }
+
+    // forever loop
+    while (1) {
+
+        if (role == role_ping_out) {
+            sleep(2);
+            printf("Initiating Basic Data Transfer\n\r");
+
+            long int cycles = 10000;                    //Change this to a higher or lower number.
+
+            // unsigned long pauseTime = millis();		//Uncomment if autoAck == 1 ( NOACK )
+            startTime = millis();
+
+            for (int i = 0; i < cycles; i++) {                //Loop through a number of cycles
+                data[0] = i;                        //Change the first byte of the payload for identification
+                if (!radio.writeFast(&data, 32)) {     //Write to the FIFO buffers
+                    counter++;                      //Keep count of failed payloads
+                }
+
+
+                //This is only required when NO ACK ( enableAutoAck(0) ) payloads are used
+                /*		if(millis() - pauseTime > 3){       // Need to drop out of TX mode every 4ms if sending a steady stream of multicast data
+                            pauseTime = millis();
+                            radio.txStandBy();				// This gives the PLL time to sync back up
+                        }
+                */
+            }
+            stopTime = millis();
+
+            if (!radio.txStandBy()) {
+                counter += 3;
+            }
+
+            float numBytes = cycles * 32;
+            float rate = numBytes / (stopTime - startTime);
+
+            printf("Transfer complete at %.2f KB/s \n\r", rate);
+            printf("%lu of %lu Packets Failed to Send\n\r", counter, cycles);
+            counter = 0;
+
+        }
+
+        if (role == role_pong_back) {
+            while (radio.available()) {
+                radio.read(&data, 32);
+                counter++;
+            }
+            if (millis() - rxTimer > 1000) {
+                rxTimer = millis();
+                printf("Rate: ");
+                float numBytes = counter * 32;
+                printf("%.2f KB/s \n\r", numBytes / 1000);
+                printf("Payload Count: %lu \n\r", counter);
+                counter = 0;
+            }
+        }
+
+    } // loop
+} // main
+
+
+
+
+
+