modified by me, to support STM32F103C6T6

dump-old-fw/how-to-dump-firmware.txt

@@ -0,0 +1,4 @@
+Use a serial tool like "putty" to connect OCD telnet port, and use file-logging function.
+Type "mdb 0x08000000 0x8000" to dump firmware bytes in ROM.
+Use a text editor to clean unrelated contents in log file.
+Use "mdb-hex.pl" to convert log file to a ".hex" file.

dump-old-fw/mdb-hex.pl

@@ -0,0 +1,32 @@
+my $base='0000';
+my $cksum;
+my $num;
+my $off;
+my $s;
+
+sub b($) {
+  my $b=shift;
+  $cksum+=hex($b);
+  $num++;
+  return uc($b);
+}
+
+while(<>) {
+  next unless m/^\s*0x([0-9A-Fa-f]{4})([0-9A-Fa-f]{4})\s*:([ 0-9A-Fa-f]+)$/;
+  if ($1 ne $base) {
+  	  $base=$1;
+  	  $cksum=0x02+0x04+hex(substr($base,0,2))+hex(substr($base,2,2));
+  	  $cksum=(0x100-$cksum&0xFF)&0xFF;
+  	  printf (":02000004${1}%02X\n", $cksum);
+  }
+  $off=$2;
+  $s=$3;
+  $cksum=hex(substr($off,0,2))+hex(substr($off,2,2));
+  $num=0;
+  $s=~s/\s*([0-9A-Fa-f]{2})\s*/b($1)/ge;
+  $cksum+=$num;
+  $cksum=(0x100-$cksum&0xFF)&0xFF;
+  printf (":%02X${off}00${s}%02X\n", $num, $cksum);
+}
+
+print ":00000001FF\n";