[doc] Put CRC-16 and generic CRC code in one Doxygen module
.. and add missing API documentation bits
Change-Id: I67119894bcbf8c779426a0272bae4c5ce1fbd1ed
diff --git a/src/crc16.c b/src/crc16.c
index b5cb956..c03c008 100644
--- a/src/crc16.c
+++ b/src/crc16.c
@@ -1,4 +1,6 @@
-/*! \file crc16.c
+/*! \addtogroup crc
+ * @{
+ * \file crc16.c
* This was copied from the linux kernel and adjusted for our types.
*/
/*
@@ -46,7 +48,7 @@
0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
};
-/*! compute the CRC-16 for the data buffer
+/*! Compute 16bit CCITT polynome 0x8408 (x^0 + x^5 + x^12) over given buffer.
* \param crc[in] previous CRC value
* \param buffer[in] data pointer
* \param len[in] number of bytes in input \ref buffer
@@ -59,6 +61,7 @@
return crc;
}
+/*! CRC table for the CCITT CRC-6. The poly is 0x8408 (x^0 + x^5 + x^12) */
uint16_t const osmo_crc16_ccitt_table[256] = {
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
@@ -94,9 +97,17 @@
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
+
+/*! Compute 16bit CCITT polynome 0x8408 (x^0 + x^5 + x^12) over given buffer.
+ * \param[in] crc initial value of CRC
+ * \param[in] buffer pointer to buffer of input data
+ * \param[in] len length of \a buffer in bytes
+ * \returns 16bit CRC */
uint16_t osmo_crc16_ccitt(uint16_t crc, uint8_t const *buffer, size_t len)
{
while (len--)
crc = osmo_crc16_ccitt_byte(crc, *buffer++);
return crc;
}
+
+/*! @} */