p25p1_check_hdu.h File Reference

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Functions
int	check_and_fix_golay_24_6 (char *hex, char *parity, int *fixed_errors)
int	check_and_fix_golay_24_12 (char *dodeca, char *parity, int *fixed_errors)
void	encode_golay_24_6 (char *hex, char *out_parity)
void	encode_golay_24_12 (char *dodeca, char *out_parity)
int	check_and_fix_redsolomon_36_20_17 (char *data, char *parity)
void	encode_reedsolomon_36_20_17 (char *hex_data, char *fixed_parity)

Function Documentation

check_and_fix_golay_24_12()

int check_and_fix_golay_24_12	(	char *	dodeca,
		char *	parity,
		int *	fixed_errors
	)

Attempts to correct a 12-bit word using the Golay(24,12,8) FEC.

Parameters

dodeca	The 12-bit word to error correct, given as a char array of 12 elements, one bit each.
parity	A 12-bit word with the Golay parity data, given as a char array of 12 elements.
fixed_error	Output. Filled with the number of errors fixed in the input.

Returns

1 if there were uncorrectable errors in the input, 0 otherwise.

check_and_fix_golay_24_6()

int check_and_fix_golay_24_6	(	char *	hex,
		char *	parity,
		int *	fixed_errors
	)

Attempts to correct an hex (6-bit) word using the Golay(24,12,8) FEC.

Parameters

hex	The 6-bit word to error correct, given as a char array of 6 elements, one bit each.
parity	A 12-bit word with the Golay parity data, given as a char array of 12 elements.
fixed_error	Output. Filled with the number of errors fixed in the input.

Returns

1 if there were uncorrectable errors in the input, 0 otherwise.

check_and_fix_redsolomon_36_20_17()

int check_and_fix_redsolomon_36_20_17	(	char *	data,
		char *	parity
	)

Attempts to correct 20 hex words using the Reed-Solomon(36,20,17) FEC.

Parameters

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

Returns

1 if irrecoverable errors have been detected, 0 otherwise.

encode_golay_24_12()

void encode_golay_24_12	(	char *	dodeca,
		char *	out_parity
	)

Encodes an 12-bitword using the Golay(24,12,8) FEC.

Parameters

dodeca	A 12-bit word to encode.
out_parity	The address to be filled with the calculated Golay parity.

encode_golay_24_6()

void encode_golay_24_6	(	char *	hex,
		char *	out_parity
	)

Encodes an hex word using the Golay(24,12,8) FEC.

Parameters

hex	A 6-bit word to encode.
out_parity	The address to be filled with the calculated Golay parity.

encode_reedsolomon_36_20_17()

void encode_reedsolomon_36_20_17	(	char *	hex_data,
		char *	fixed_parity
	)

Calculates the Reed-Solomon parity of 20 words of 6 bits each.

Parameters

hex_data	The address with the words whose parity we want to calculate.
fixed_parity	The address to be filled with the calculated parity. 16 words of 6 bits are produced.