Added current version of format description. Added 'first contact' code example by of22.

tools/nano/NRF24_SendRcv/include/stdinout.cpp

@@ -0,0 +1,47 @@
+#if ARDUINO >= 100
+#include "Arduino.h"
+#else
+#include "WProgram.h"
+#endif
+#include <stdio.h>
+#include "stdinout.h"
+
+// Function that printf and related will use to print
+static int serial_putchar(char c, FILE *f)
+{
+        if(c == '\n') {
+                serial_putchar('\r', f);
+        }
+
+        return Serial.write(c) == 1 ? 0 : 1;
+}
+// Function that scanf and related will use to read
+static int serial_getchar(FILE *)
+{
+        // Wait until character is avilable
+        while(Serial.available() <= 0) { ; }
+
+        return Serial.read();
+}
+
+static FILE serial_stdinout;
+
+static void setup_stdin_stdout()
+{
+        // Set up stdout and stdin
+        fdev_setup_stream(&serial_stdinout, serial_putchar, serial_getchar, _FDEV_SETUP_RW);
+        stdout = &serial_stdinout;
+        stdin  = &serial_stdinout;
+        stderr = &serial_stdinout;
+}
+
+// Initialize the static variable to 0
+size_t initializeSTDINOUT::initnum = 0;
+
+// Constructor that calls the function to set up stdin and stdout
+initializeSTDINOUT::initializeSTDINOUT()
+{
+        if(initnum++ == 0) {
+                setup_stdin_stdout();
+        }
+}