The Cyclic Redundancy Check 16 is a hash function that produces a checksum that is used to detect errors in transmissions.
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file | crc16.c |
| Implementation of the CRC16 calculcation
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unsigned short | crc16_add (unsigned char b, unsigned short crc) |
| Update an accumulated CRC16 checksum with one byte. More...
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unsigned short | crc16_data (const unsigned char *data, int datalen, unsigned short acc) |
| Calculate the CRC16 over a data area. More...
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The Cyclic Redundancy Check 16 is a hash function that produces a checksum that is used to detect errors in transmissions.
The CRC16 calculation module is an iterative CRC calculator that can be used to cumulatively update a CRC checksum for every incoming byte.
◆ crc16_add()
unsigned short crc16_add |
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unsigned char |
b, |
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unsigned short |
crc |
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Update an accumulated CRC16 checksum with one byte.
- Parameters
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b | The byte to be added to the checksum |
crc | The accumulated CRC that is to be updated. |
- Returns
- The updated CRC checksum.
This function updates an accumulated CRC16 checksum
with one byte. It can be used as a running checksum, or
to checksum an entire data block.
\note The algorithm used in this implementation is
tailored for a running checksum and does not perform as
well as a table-driven algorithm when checksumming an
entire data block.
Definition at line 47 of file crc16.c.
◆ crc16_data()
unsigned short crc16_data |
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const unsigned char * |
data, |
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int |
datalen, |
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unsigned short |
acc |
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Calculate the CRC16 over a data area.
- Parameters
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data | Pointer to the data |
datalen | The length of the data |
acc | The accumulated CRC that is to be updated (or zero). |
- Returns
- The CRC16 checksum.
This function calculates the CRC16 checksum of a data area.
\note The algorithm used in this implementation is
tailored for a running checksum and does not perform as
well as a table-driven algorithm when checksumming an
entire data block.
Definition at line 66 of file crc16.c.