Added CRC8 calculations

2026-05-01 11:29:09 +08:00 · 2014-11-01 16:28:29 +00:00 · 2014-11-01 16:28:29 +00:00 · e695e75fa0
commit e695e75fa0
parent ff941a6ecb
1 changed files with 112 additions and 0 deletions
--- a/crc8.h
+++ b/crc8.h
@ -0,0 +1,112 @@
+///\file
+
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+
+Copyright(c) 2014 jwellbelove
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files(the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions :
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+******************************************************************************/
+
+#ifndef __etl_crc8__
+#define __etl_crc8__
+
+#include <iterator>
+#include <cstdint>
+
+///\defgroup crc8 Eight bit CRC calculation
+///\ingroup crc
+
+namespace etl
+{
+  /// CRC8 table
+  /// \ingroup crc8
+  const uint8_t CRC8[] =
+  {
+    0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15, 0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
+    0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65, 0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
+    0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5, 0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
+    0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85, 0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
+    0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2, 0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
+    0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2, 0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
+    0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32, 0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
+    0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42, 0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
+    0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C, 0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
+    0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC, 0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
+    0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C, 0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
+    0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C, 0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
+    0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B, 0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
+    0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B, 0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
+    0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB, 0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
+    0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB, 0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
+  };
+
+  //*********************************************************************
+  /// Caculates CRC8 using polynomial 0x07.
+  /// CRC8 of "123456789" = 0xF4.
+  /// \param value The new value.
+  /// \param initial_value The initial CRC8 value to use.
+  /// \return The CRC8 result.
+  /// \ingroup crc
+  //*********************************************************************
+  template<typename TValue>
+  uint8_t crc8(TValue value, uint8_t initial_value)
+  {
+    uint8_t crc = initial_value;
+
+    // How many bytes in a value?
+    size_t n_bytes = sizeof(TValue) / sizeof(uint8_t);
+
+    uint8_t* p_data = reinterpret_cast<uint8_t*>(&value);
+
+    for (size_t i = 0; i < n_bytes; ++i)
+    {
+      crc = CRC8[crc ^ p_data[i]];
+    }
+
+    return crc;
+  }
+
+  //*********************************************************************
+  /// Caculates CRC8 using polynomial 0x07.
+  /// CRC8 of "123456789" = 0xF4.
+  /// \param begin         Start of the range.
+  /// \param end           End of the range.
+  /// \param initial_value The initial CRC8 value to use.
+  /// \return The CRC8 result.
+  /// \ingroup crc
+  //*********************************************************************
+  template<typename TIterator>
+  uint8_t crc8(TIterator begin, const TIterator end, uint8_t initial_value)
+  {
+    uint8_t crc = initial_value;
+
+    while (begin != end)
+    {
+      crc = crc8(*begin, crc);
+      ++begin;
+    }
+
+    return crc;
+  }
+}
+
+#endif