From 34efd5ac94a5c5fd173a26fd11d5ef9b50c25b65 Mon Sep 17 00:00:00 2001
From: maniacbug <maniacbug@ymail.com>
Date: Fri, 27 May 2011 20:09:29 -0700
Subject: [PATCH] Added setCRCLength

---
 RF24.cpp | 11 +++++++++++
 RF24.h   |  9 ++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/RF24.cpp b/RF24.cpp
index 531401e..e5110f1 100644
--- a/RF24.cpp
+++ b/RF24.cpp
@@ -619,6 +619,17 @@ void RF24::setDataRate(rf24_datarate_e speed)
   if (speed == RF24_2MBPS)
     setup |= RF_DR;
   write_register(RF_SETUP,setup);
+
+}
+
+/******************************************************************/
+
+void RF24::setCRCLength(rf24_crclength_e length)
+{
+  uint8_t config = read_register(CONFIG) & _BV(CRCO);
+  if (length == RF24_CRC_16)
+    config |= _BV(CRCO);
+  write_register(CONFIG,config);
 }
 
 // vim:ai:cin:sts=2 sw=2 ft=cpp
diff --git a/RF24.h b/RF24.h
index 53f71ff..3165947 100644
--- a/RF24.h
+++ b/RF24.h
@@ -12,6 +12,7 @@
 #include <inttypes.h>
 
 typedef enum { RF24_1MBPS = 0, RF24_2MBPS } rf24_datarate_e;
+typedef enum { RF24_CRC_8 = 0, RF24_CRC_16 } rf24_crclength_e;
 
 /**
  * Driver for nRF24L01(+) 2.4GHz Wireless Transceiver
@@ -420,7 +421,6 @@ public:
    *
    * @return true if was carrier, false if not
    */
-
   boolean testCarrier(void);
 
   /**
@@ -429,6 +429,13 @@ public:
    * @param speed RF24_1MBPS for 1Mbps or RF24_2MBPS for 2Mbps
    */
   void setDataRate(rf24_datarate_e speed);
+ 
+  /**
+   * Set the CRC length 
+   *
+   * @param length RF24_CRC_8 for 8-bit or RF24_CRC_16 for 16-bit
+   */
+  void setCRCLength(rf24_crclength_e length);
   
   /**@}*/
 };