p25p1_check_ldu.h File Reference

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Functions
int	check_and_fix_hamming_10_6_3 (char *hex, char *parity)
void	encode_hamming_10_6_3 (char *hex, char *out_parity)
int	check_and_fix_reedsolomon_24_12_13 (char *data, char *parity)
void	encode_reedsolomon_24_12_13 (char *hex_data, char *fixed_parity)
int	check_and_fix_reedsolomon_24_16_9 (char *data, char *parity)
void	encode_reedsolomon_24_16_9 (char *hex_data, char *fixed_parity)

Function Documentation

check_and_fix_hamming_10_6_3()

int check_and_fix_hamming_10_6_3	(	char *	hex,
		char *	parity )

Attempts to error correct a hex (6-bit) word using the Hamming(10,6,3) FEC.

Parameters

hex	The 6-bit word to error correct.
parity	The parity to use in the error correction. 4 bits.

Returns

The estimated error count. It might be erroneous.

check_and_fix_reedsolomon_24_12_13()

int check_and_fix_reedsolomon_24_12_13	(	char *	data,
		char *	parity )

Attempts to correct 12 hex words using the Reed-Solomon(24,12,13) FEC.

Parameters

data	The packed hex words, each of 6 chars, one after the other.
parity	The corresponding 12 hex words with the parity information.

Returns

1 if irrecoverable errors have been detected, 0 otherwise.

check_and_fix_reedsolomon_24_16_9()

int check_and_fix_reedsolomon_24_16_9	(	char *	data,
		char *	parity )

Attempts to correct 16 hex words using the Reed-Solomon(24,16,9) FEC.

Parameters

data	The packed 16 hex words, each of 6 chars, one after the other.
parity	The corresponding 8 hex words with the parity information.

Returns

1 if irrecoverable errors have been detected, 0 otherwise.

encode_hamming_10_6_3()

void encode_hamming_10_6_3	(	char *	hex,
		char *	out_parity )

Encodes an hex word with the Hamming(10,6,3) FEC.

Parameters

hex	The 6-bit word to error correct.
out_parity	The address where to store the calculated parity. 4 bytes are used, one for each bit.

encode_reedsolomon_24_12_13()

void encode_reedsolomon_24_12_13	(	char *	hex_data,
		char *	fixed_parity )

Encodes 12 hex words with the Reed-Solomon(24,12,13) FEC.

Parameters

hex_data

The packed 12 hex words to encode. \fixed_parity The address were to store the 12 hex words with the Reed-Solomon parity.

encode_reedsolomon_24_16_9()

void encode_reedsolomon_24_16_9	(	char *	hex_data,
		char *	fixed_parity )

Encodes 12 hex words with the Reed-Solomon(24,16,9) FEC.

Parameters

hex_data

The packed 16 hex words to encode. \fixed_parity The address were to store the 8 hex words with the Reed-Solomon parity.