rf24-pio/tests/pingpair_blocking/pingpair_blocking.pde

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/*
Copyright (C) 2011 James Coliz, Jr. <maniacbug@ymail.com>
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.
*/
#include <SPI.h>
#include "nRF24L01.h"
#include "RF24.h"
#include "printf.h"
//
// Test version of RF24, exposes some protected interface
//
class RF24Test: public RF24
{
public: RF24Test(int a, int b): RF24(a,b) {}
};
//
// Hardware configuration
//
// Set up nRF24L01 radio on SPI bus plus pins 8 & 9
RF24Test radio(8,9);
// sets the role of this unit in hardware. Connect to GND to be the 'pong' receiver
// Leave open to be the 'ping' transmitter
const int role_pin = 7;
//
// Topology
//
// Radio pipe addresses for the 2 nodes to communicate.
const uint64_t pipes[2] = { 0xF0F0F0F0E1LL, 0xF0F0F0F0D2LL };
//
// Role management
//
// Set up role. This sketch uses the same software for all the nodes
// in this system. Doing so greatly simplifies testing. The hardware itself specifies
// which node it is.
//
// This is done through the role_pin
//
// The various roles supported by this sketch
typedef enum { role_ping_out = 1, role_pong_back } role_e;
// The debug-friendly names of those roles
const char* role_friendly_name[] = { "invalid", "Ping out", "Pong back"};
// The role of the current running sketch
role_e role;
//
// Test state
//
bool done; //*< Are we done with the test? */
bool passed; //*< Have we passed the test? */
bool notified; //*< Have we notified the user we're done? */
const int num_needed = 10; //*< How many success/failures until we're done? */
int receives_remaining = num_needed; //*< How many ack packets until we declare victory? */
int failures_remaining = num_needed; //*< How many more failed sends until we declare failure? */
const int interval = 100; //*< ms to wait between sends */
char configuration = '1'; //*< Configuration key, one char sent in by the test framework to tell us how to configure, this is the default */
void one_ok(void)
{
// Have we received enough yet?
if ( ! --receives_remaining )
{
done = true;
passed = true;
}
}
void one_failed(void)
{
// Have we failed enough yet?
if ( ! --failures_remaining )
{
done = true;
passed = false;
}
}
void setup(void)
{
//
// Role
//
// set up the role pin
pinMode(role_pin, INPUT);
digitalWrite(role_pin,HIGH);
delay(20); // Just to get a solid reading on the role pin
// read the address pin, establish our role
if ( digitalRead(role_pin) )
role = role_ping_out;
else
role = role_pong_back;
//
// Print preamble
//
Serial.begin(57600);
printf_begin();
printf("\n\rRF24/tests/pingpair_blocking/\n\r");
printf("ROLE: %s\n\r",role_friendly_name[role]);
//
// get test config
//
printf("+READY press any key to start\n\r\n\r");
while (! Serial.available() ) {}
configuration = Serial.read();
printf("Configuration\t = %c\n\r",configuration);
//
// Setup and configure rf radio
//
radio.begin();
//
// Open pipes to other nodes for communication
//
// This simple sketch opens two pipes for these two nodes to communicate
// back and forth.
// Open 'our' pipe for writing
// Open the 'other' pipe for reading, in position #1 (we can have up to 5 pipes open for reading)
if ( role == role_ping_out )
{
radio.openWritingPipe(pipes[0]);
radio.openReadingPipe(1,pipes[1]);
}
else
{
radio.openWritingPipe(pipes[1]);
radio.openReadingPipe(1,pipes[0]);
}
//
// Start listening
//
radio.startListening();
//
// Dump the configuration of the rf unit for debugging
//
radio.printDetails();
if ( role == role_pong_back )
printf("\n\r+OK ");
}
void loop(void)
{
//
// Ping out role. Repeatedly send the current time
//
if (role == role_ping_out)
{
// First, stop listening so we can talk.
radio.stopListening();
// Take the time, and send it. This will block until complete
unsigned long time = millis();
printf("Now sending %lu...",time);
radio.write( &time, sizeof(unsigned long) );
// Now, continue listening
radio.startListening();
// Wait here until we get a response, or timeout (250ms)
unsigned long started_waiting_at = millis();
bool timeout = false;
while ( ! radio.available() && ! timeout )
if (millis() - started_waiting_at > 200 )
timeout = true;
// Describe the results
if ( timeout )
{
printf("Failed, response timed out.\n\r");
one_failed();
}
else
{
// Grab the response, compare, and send to debugging spew
unsigned long got_time;
radio.read( &got_time, sizeof(unsigned long) );
// Spew it
printf("Got response %lu, round-trip delay: %lu\n\r",got_time,millis()-got_time);
one_ok();
}
// Try again later
delay(250);
}
//
// Pong back role. Receive each packet, dump it out, and send it back
//
if ( role == role_pong_back )
{
// if there is data ready
if ( radio.available() )
{
// Dump the payloads until we've gotten everything
unsigned long got_time;
bool done = false;
while (!done)
{
// Fetch the payload, and see if this was the last one.
done = radio.read( &got_time, sizeof(unsigned long) );
// Spew it
printf("Got payload %lu...",got_time);
// Delay just a little bit to let the other unit
// make the transition to receiver
delay(20);
}
// First, stop listening so we can talk
radio.stopListening();
// Send the final one back.
radio.write( &got_time, sizeof(unsigned long) );
printf("Sent response.\n\r");
// Now, resume listening so we catch the next packets.
radio.startListening();
}
}
//
// Stop the test if we're done and report results
//
if ( done && ! notified )
{
notified = true;
printf("\n\r+OK ");
if ( passed )
printf("PASS\n\r\n\r");
else
printf("FAIL\n\r\n\r");
}
}
// vim:cin:ai:sts=2 sw=2 ft=cpp