/*******************************************************************************
*
*????File?Name:??bch_decoder.c
*?????Revision:??2.0
*?????????Date:??March?2007
*????????Email:??nandsupport@micron.com
*??????Company:??Micron?Technology?Inc.
*
*??Description:??Micron?NAND?BCH?Decoder
*
*???References:?
*?		??1.?Error?Control?Coding?Lin?&?Costello?2nd?Ed.?2004
*?		??2.?Error?Control?Codes?Blahut?1983
**
*???Disclaimer???This?software?code?and?all?associated?documentation?comments?or?other?
*??of?Warranty:??information?（collectively?“Software“）?is?provided?“AS?IS“?without?
*????????????????warranty?of?any?kind.?MICRON?TECHNOLOGY?INC.?（“MTI“）?EXPRESSLY?
*????????????????DISCLAIMS?ALL?WARRANTIES?EXPRESS?OR?IMPLIED?INCLUDING?BUT?NOT?LIMITED?
*????????????????TO?NONINFRINGEMENT?OF?THIRD?PARTY?RIGHTS?AND?ANY?IMPLIED?WARRANTIES?
*????????????????OF?MERCHANTABILITY?OR?FITNESS?FOR?ANY?PARTICULAR?PURPOSE.?MTI?DOES?NOT?
*????????????????WARRANT?THAT?THE?SOFTWARE?WILL?MEET?YOUR?REQUIREMENTS?OR?THAT?THE?
*????????????????OPERATION?OF?THE?SOFTWARE?WILL?BE?UNINTERRUPTED?OR?ERROR-FREE.?
*????????????????FURTHERMORE?MTI?DOES?NOT?MAKE?ANY?REPRESENTATIONS?REGARDING?THE?USE?OR?
*????????????????THE?RESULTS?OF?THE?USE?OF?THE?SOFTWARE?IN?TERMS?OF?ITS?CORRECTNESS?
*????????????????ACCURACY?RELIABILITY?OR?OTHERWISE.?THE?ENTIRE?RISK?ARISING?OUT?OF?USE?
*????????????????OR?PERFORMANCE?OF?THE?SOFTWARE?REMAINS?WITH?YOU.?IN?NO?EVENT?SHALL?MTI?
*????????????????ITS?AFFILIATED?COMPANIES?OR?THEIR?SUPPLIERS?BE?LIABLE?FOR?ANY?DIRECT?
*????????????????INDIRECT?CONSEQUENTIAL?INCIDENTAL?OR?SPECIAL?DAMAGES?（INCLUDING?
*????????????????WITHOUT?LIMITATION?DAMAGES?FOR?LOSS?OF?PROFITS?BUSINESS?INTERRUPTION?
*????????????????OR?LOSS?OF?INFORMATION）?ARISING?OUT?OF?YOUR?USE?OF?OR?INABILITY?TO?USE?
*????????????????THE?SOFTWARE?EVEN?IF?MTI?HAS?BEEN?ADVISED?OF?THE?POSSIBILITY?OF?SUCH?
*????????????????DAMAGES.?Because?some?jurisdictions?prohibit?the?exclusion?or?
*????????????????limitation?of?liability?for?consequential?or?incidental?damages?the?
*????????????????above?limitation?may?not?apply?to?you.
*
*????????????????Copyright?2007?Micron?Technology?Inc.?All?rights?reserved.
*
*?Rev??Author			Date		Changes
*?---??---------------	----------	-------------------------------
*?1.0??ZS		08/07/2006	Initial?release
*?2.0??PF		03/05/2007	Fixed?bug?that?caused?some?codewords
*?					to?not?be?corrected
*?
*?
/*******************************************************************************/

#include?“BCH_Global.c“

int?bb[rr_max]?;	//?Syndrome?polynomial
int?s[rr_max];		//?Syndrome?values
int?syn_error;		//?Syndrome?error?indicator
int?count;		//?Number?of?errors
int?location[tt_max];	//?Error?location
int?ttx2;		//?2t
int?decode_flag;	//?Decoding?indicator?
	
void?parallel_syndrome（）?{
/*?Parallel?computation?of?2t?syndromes.
?*?Use?the?same?lookahead?matrix?T_G_R?of?parallel?computation?of?parity?check?bits.
?*

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????16734??2007-03-05?19:50??bch_decoder.c
?????文件????????8230??2007-03-05?19:50??bch_encoder.c
?????文件??????135345??2007-03-05?11:00??bch_encoder_decoder.pdf
?????文件????????9813??2007-03-05?19:51??bch_global.c
?????文件????????2334??2007-03-05?11:23??bug_data_pattern
?????文件????????4253??2007-03-05?19:51??data_generator.c
?????文件????????5701??2007-03-05?19:51??error.c
?????文件?????1156156??2008-04-14?15:24??K9LAG08U0M_0.7.pdf
?????文件?????????568??2007-03-05?11:35??release_notes
?????文件?????????417??2007-03-05?11:30??test_script