Updated some examples to show the new lib usage

Updated GettingStarted, pingpair, added medium speed version of transfer
rate test

examples/Transfer/Transfer.ino

@@ -0,0 +1,163 @@
+/*
+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 <SPI.h>
+#include "nRF24L01.h"
+#include "RF24.h"
+#include "printf.h"
+
+// Hardware configuration
+// Set up nRF24L01 radio on SPI bus plus pins 9 & 10 
+
+RF24 radio(48,49);
+
+// Topology
+// Radio pipe addresses for the 2 nodes to communicate.
+const uint64_t pipes[2] = { 0xABCDABCD71LL, 0x544d52687CLL };
+
+// Role management
+// Set up role.  This sketch uses the same software for all the nodes
+// in this system.  Doing so greatly simplifies testing.  
+
+// The various roles supported by this sketch
+typedef enum { role_TX = 1, role_RX } role_e;
+
+// The debug-friendly names of those roles
+const char* role_friendly_name[] = { "invalid", "Ping out", "Pong back"};
+
+//Set this to determine the default role of the current running sketch
+role_e role = role_RX;
+
+//Data buffer for testing data transfer speeds
+byte data[32]; 
+
+//Counter and timer for keeping track transfer info
+unsigned long counter, rxTimer;
+float startTime, stopTime;  
+
+void setup(void)
+{
+
+  Serial.begin(57600);
+  printf_begin();
+  printf("\n\rRF24/examples/GettingStarted/\n\r");
+  printf("ROLE: %s\n\r",role_friendly_name[role]);
+  printf("*** PRESS 'T' to begin transmitting to the other node\n\r");
+
+  radio.begin();                          // Setup and configure rf radio
+  radio.setChannel(1);
+  radio.setPALevel(RF24_PA_MAX);
+  radio.setAutoAck(1);  // Ensure autoACK is enabled
+  radio.setRetries(2,3);                // Optionally, increase the delay between retries & # of retries
+  //radio.disableCRC();
+  radio.setCRCLength(RF24_CRC_8); 
+  radio.openWritingPipe(pipes[1]);
+  radio.openReadingPipe(1,pipes[0]);
+
+  radio.startListening();                 // Start listening
+  radio.printDetails();                   // Dump the configuration of the rf unit for debugging
+  
+  randomSeed(analogRead(0));              //Seed for random number generation
+  
+  for(int i=0; i<32; i++){
+     data[i] = random(255);               //Load the buffer with random data
+  }
+  radio.powerUp();
+}
+
+void loop(void){
+
+  
+  //TX with pre-blocking writes
+  if(role == role_TX){
+    
+    delay(1500);
+    
+    printf("Initiating Basic Data Transfer\n\r");
+    
+    
+    float cycles = 10000;
+    
+    startTime = millis();
+            
+    for(int i=0; i<cycles; i++){
+      if(!radio.writeFast(&data,32)){
+        counter++;
+      }
+    }
+    stopTime = millis();
+     
+   while(!radio.txStandBy()){ }
+   
+   float numBytes = cycles * 32;
+   float rate = numBytes / (stopTime - startTime) / cycles;
+
+    
+    printf("Transfer complete at "); Serial.print(rate); printf(" KB/s \n\r");
+    printf("%d of ",counter); Serial.print(cycles); printf(" Packets Failed to Send\n\r");
+    counter = 0;   
+    
+
+
+
+   }
+  
+  
+  
+  if(role == role_RX){
+     while(radio.available()){       
+      radio.read(&data,32);
+      counter++;
+     }
+   if(millis() - rxTimer > 1000){
+     rxTimer = millis();
+//     printf("Rx Rate: ");
+//     Serial.print(counter*32/1000);
+//     printf(" KB/s\n\r"); 
+     printf("Payload Count: %d \n\r", counter);
+     counter = 0;
+   }
+    
+  }
+
+  //
+  // Change roles
+  //
+
+  if ( Serial.available() )
+  {
+    char c = toupper(Serial.read());
+    if ( c == 'T' && role == role_RX )
+    {
+      printf("*** CHANGING TO TRANSMIT ROLE -- PRESS 'R' TO SWITCH BACK\n\r");
+      radio.stopListening();
+      role = role_TX;                  // Become the primary transmitter (ping out)
+      //radio.openWritingPipe(pipes[0]);
+      //radio.openReadingPipe(1,pipes[1]);
+    }
+    else if ( c == 'R' && role == role_TX )
+    {
+      radio.startListening();
+      printf("*** CHANGING TO RECEIVE ROLE -- PRESS 'T' TO SWITCH BACK\n\r");
+      
+       role = role_RX;                // Become the primary receiver (pong back)
+       
+      //radio.openWritingPipe(pipes[1]);
+      //radio.openReadingPipe(1,pipes[0]);
+    }
+  }
+}
+// vim:cin:ai:sts=2 sw=2 ft=cpp

examples/Transfer/printf.h

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+/*
+ Copyright (C) 2011 J. Coliz <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.
+ */
+ 
+/**
+ * @file printf.h
+ *
+ * Setup necessary to direct stdout to the Arduino Serial library, which
+ * enables 'printf'
+ */
+
+#ifndef __PRINTF_H__
+#define __PRINTF_H__
+
+#ifdef ARDUINO
+
+int serial_putc( char c, FILE * ) 
+{
+  Serial.write( c );
+
+  return c;
+} 
+
+void printf_begin(void)
+{
+  fdevopen( &serial_putc, 0 );
+}
+
+#else
+#error This example is only for use on Arduino.
+#endif // ARDUINO
+
+#endif // __PRINTF_H__