From 99ca4ddb3ddc89e9525e2fa3f64cbb06dfbd1e58 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Xiaoyu=20Hong=EF=BC=88=E6=B4=AA=E5=95=B8=E5=AE=87=EF=BC=89?=
 <xiaoyu.hong@anlogic.com>
Date: Tue, 27 Dec 2022 14:19:30 +0800
Subject: [PATCH] fix syndrome matrix decode bug

---
 hamming_producer.m | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/hamming_producer.m b/hamming_producer.m
index e29fbc7..1d0e8d4 100644
--- a/hamming_producer.m
+++ b/hamming_producer.m
@@ -12,7 +12,7 @@
 
 clear all
 
-K = 4; % data bits
+K = 64; % data bits
 USE_POLY = 0;
 POLY = [0 1 0 0 1];
 
@@ -20,7 +20,7 @@
 
 % calculate correction bits
 % 1.25 - still magic numbers
-m = ceil(log2(1.25*K));
+m = log2(K)+1;%ceil(log2(1.25*K));
 
 if USE_POLY == 1
   [h,g,n,k] = hammgen(m, POLY);
@@ -93,7 +93,8 @@
 fprintf(fid,'\n');
 
 for kk = 1:K
-  fprintf(fid,'  assign DOUT[%02d] = D[%02d] ^',kk-1,kk-1);
+  fprintf(fid,'  assign DOUT[%02d] = D[%02d] ^(',kk-1,kk-1);
+  %fprintf(fid,'(S==%02d%''h%X); ',m,g(kk));
   and_flag = 0;
   for mm = 1:m
     if g(kk,mm) == 1
@@ -102,11 +103,18 @@
       else
         fprintf(fid,' & ');
       end
-      if kk<11 fprintf(fid,' '); end
-      fprintf(fid,'S[%d]',mm-1);
+    else
+      if and_flag == 0
+        fprintf(fid,'!');
+        and_flag = 1;
+      else
+        fprintf(fid,' & !');
+      end
     end
+    if kk<11 fprintf(fid,' '); end
+    fprintf(fid,'S[%d]',mm-1);
   end
-  fprintf(fid,';\n');
+  fprintf(fid,');\n');
 end
 fprintf(fid,'\n');
 
@@ -118,4 +126,4 @@
 
 fclose(fid);
 
-quit
+%quit