forked and modified initial value for return values and changed timer definition to TIM1 instead of int(1)

RHCRC.h

@@ -0,0 +1,19 @@
+// RHCRC.h
+//
+// Definitions for RadioHead compatible CRC outines.
+//
+// These routines originally derived from Arduino source code. See RHCRC.cpp
+// for copyright information
+// $Id: RHCRC.h,v 1.1 2014/06/24 02:40:12 mikem Exp $
+
+#ifndef RHCRC_h
+#define RHCRC_h
+
+#include <RadioHead.h>
+
+extern uint16_t RHcrc16_update(uint16_t crc, uint8_t a);
+extern uint16_t RHcrc_xmodem_update (uint16_t crc, uint8_t data);
+extern uint16_t RHcrc_ccitt_update (uint16_t crc, uint8_t data);
+extern uint8_t  RHcrc_ibutton_update(uint8_t crc, uint8_t data);
+
+#endif