初始化提交
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王立帮
184
arduino-cli/libraries/RF24/examples_linux/gettingstarted.cpp
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184
arduino-cli/libraries/RF24/examples_linux/gettingstarted.cpp
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/*
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Copyright (C) 2011 J. Coliz <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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03/17/2013 : Charles-Henri Hallard (http://hallard.me)
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Modified to use with Arduipi board http://hallard.me/arduipi
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Changed to use modified bcm2835 and RF24 library
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TMRh20 2014 - Updated to work with optimized RF24 Arduino library
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*/
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/**
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* Example RF Radio Ping Pair
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*
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* This is an example of how to use the RF24 class on RPi, communicating to an Arduino running
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* the GettingStarted sketch.
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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 <unistd.h>
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#include <RF24/RF24.h>
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using namespace std;
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//
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// Hardware configuration
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// Configure the appropriate pins for your connections
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/****************** Linux ***********************/
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// Radio CE Pin, CSN Pin, SPI Speed
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// CE Pin uses GPIO number with BCM and SPIDEV drivers, other platforms use their own pin numbering
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// CS Pin addresses the SPI bus number at /dev/spidev<a>.<b>
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// ie: RF24 radio(<ce_pin>, <a>*10+<b>); spidev1.0 is 10, spidev1.1 is 11 etc..
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// Generic:
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RF24 radio(22,0);
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/****************** Linux (BBB,x86,etc) ***********************/
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// See http://tmrh20.github.io/RF24/pages.html for more information on usage
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// See http://iotdk.intel.com/docs/master/mraa/ for more information on MRAA
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// See https://www.kernel.org/doc/Documentation/spi/spidev for more information on SPIDEV
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/********** User Config *********/
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// Assign a unique identifier for this node, 0 or 1
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bool radioNumber = 1;
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/********************************/
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// Radio pipe addresses for the 2 nodes to communicate.
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const uint8_t pipes[][6] = {"1Node", "2Node"};
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int main(int argc, char** argv)
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{
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bool role_ping_out = true, role_pong_back = false;
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bool role = role_pong_back;
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cout << "RF24/examples/GettingStarted/\n";
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// Setup and configure rf radio
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radio.begin();
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// optionally, increase the delay between retries & # of retries
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radio.setRetries(15, 15);
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// Dump the configuration of the rf unit for debugging
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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 pong_back, 1 for ping_out (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 {
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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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// This simple sketch opens two pipes for these two nodes to communicate
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// back and forth.
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if (!radioNumber) {
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radio.openWritingPipe(pipes[0]);
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radio.openReadingPipe(1, pipes[1]);
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} else {
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radio.openWritingPipe(pipes[1]);
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radio.openReadingPipe(1, pipes[0]);
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}
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radio.startListening();
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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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// First, stop listening so we can talk.
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radio.stopListening();
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// Take the time, and send it. This will block until complete
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printf("Now sending...\n");
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unsigned long time = millis();
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bool ok = radio.write(&time, sizeof(unsigned long));
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if (!ok) {
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printf("failed.\n");
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}
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// Now, continue listening
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radio.startListening();
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// Wait here until we get a response, or timeout (250ms)
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unsigned long started_waiting_at = millis();
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bool timeout = false;
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while (!radio.available() && !timeout) {
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if (millis() - started_waiting_at > 200) {
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timeout = true;
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}
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}
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// Describe the results
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if (timeout) {
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printf("Failed, response timed out.\n");
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} else {
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// Grab the response, compare, and send to debugging spew
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unsigned long got_time;
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radio.read(&got_time, sizeof(unsigned long));
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// Spew it
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printf("Got response %lu, round-trip delay: %lu\n", got_time, millis() - got_time);
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}
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sleep(1);
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}
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//
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// Pong back role. Receive each packet, dump it out, and send it back
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//
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if (role == role_pong_back) {
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// if there is data ready
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if (radio.available()) {
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// Dump the payloads until we've gotten everything
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unsigned long got_time;
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// Fetch the payload, and see if this was the last one.
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while (radio.available()) {
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radio.read(&got_time, sizeof(unsigned long));
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}
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radio.stopListening();
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radio.write(&got_time, sizeof(unsigned long));
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// Now, resume listening so we catch the next packets.
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radio.startListening();
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// Spew it
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printf("Got payload(%d) %lu...\n", sizeof(unsigned long), got_time);
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delay(925); //Delay after payload responded to, minimize RPi CPU time
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}
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}
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} // forever loop
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return 0;
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}
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