Diff: nordic/nrf-sdk/app_common/crc16.h

Revision:

0:eff01767de02

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nordic/nrf-sdk/app_common/crc16.h	Wed Mar 26 14:38:17 2014 +0000
@@ -0,0 +1,44 @@
+/* Copyright (c) 2013 Nordic Semiconductor. All Rights Reserved.
+ *
+ * The information contained herein is property of Nordic Semiconductor ASA.
+ * Terms and conditions of usage are described in detail in NORDIC
+ * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
+ *
+ * Licensees are granted free, non-transferable use of the information. NO
+ * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
+ * the file.
+ *
+ */
+ 
+/** @file
+ *
+ * @defgroup crc_compute CRC compute
+ * @{
+ * @ingroup hci_transport
+ *
+ * @brief    This module implements the CRC-16 calculation in the blocks.
+ */
+ 
+#ifndef CRC16_H__
+#define CRC16_H__
+
+#include <stdint.h>
+#include "nordic_global.h"
+
+/**@brief Function for calculating CRC-16 in blocks.
+ *
+ * Feed each consecutive data block into this function, along with the current value of p_crc as 
+ * returned by the previous call of this function. The first call of this function should pass NULL 
+ * as the initial value of the crc in p_crc.
+ *
+ * @param[in] p_data The input data block for computation.
+ * @param[in] size   The size of the input data block in bytes.
+ * @param[in] p_crc  The previous calculated CRC-16 value or NULL if first call.  
+ *
+ * @return The updated CRC-16 value, based on the input supplied.
+ */
+uint16_t crc16_compute(const uint8_t * p_data, uint32_t size, const uint16_t * p_crc);
+
+#endif // CRC16_H__
+ 
+/** @} */