From 4ac2a571cc33d04b31cf251d13a38eb98c3d4fc2 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Sun, 12 Jun 2016 15:54:32 +0200
Subject: [PATCH] specify bsdl file and read boundary length from it

---
 openocd-jtag-boundary-scan.pl | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/openocd-jtag-boundary-scan.pl b/openocd-jtag-boundary-scan.pl
index 3169f1b..1e381e7 100755
--- a/openocd-jtag-boundary-scan.pl
+++ b/openocd-jtag-boundary-scan.pl
@@ -8,6 +8,8 @@ use IO::Socket::INET;
 use Storable;
 
 my $openocd_remote = shift @ARGV || 'picam:4444';
+my $bsdl_file = $ENV{BSDL} || '_3128at100.bsd';
+my $BOUNDARY_LENGTH = 288;
 
 my $bit2pin;
 my $io2bit;
@@ -18,7 +20,7 @@ my $pin_map = '';
 
 $|=1; # flush stdout
 
-open(my $bsdl, '<', '_3128at100.bsd');
+open(my $bsdl, '<', $bsdl_file);
 while(<$bsdl>) {
 	if ( m/PIN_MAP_STRING/ ) {
 		$pin_map .= $_;
@@ -30,7 +32,11 @@ while(<$bsdl>) {
 	} elsif ( m/"(\d+)\s+\(BC_\d+,\s+(\S+),\s+(\S+)/ ) {
 		$bit2pin->{$1} = [ $2, $3 ];
 		push @{ $io2bit->{$2} }, $1;
+	} elsif ( m/attribute\s+BOUNDARY_LENGTH\s+of\s+\S+\s*:\s*entity\s+is\s+(\d+);/ ) {
+		$BOUNDARY_LENGTH = $1;
+		warn "# BSDL $bsdl_file BOUNDARY_LENGTH = $BOUNDARY_LENGTH\n";
 	}
+
 }
 close($bsdl);
 
@@ -118,7 +124,7 @@ my $BSR;
 
 # first sample
 print $sock "irscan x300.tap 0x55\n"; # SAMPLE/PRELOAD
-print $sock "drscan x300.tap 288 0\n";
+print $sock "drscan x300.tap $BOUNDARY_LENGTH 0\n";
 
 while(1) {
 
@@ -148,7 +154,7 @@ sub diff_bits {
 		if ( $o[$i] eq $n[$i] ) {
 			$o[$i]='.';
 		} else {
-			my $pin = $bit2pin->{ 288 - ($i * 3) - 3 }->[0];
+			my $pin = $bit2pin->{ $BOUNDARY_LENGTH - ($i * 3) - 3 }->[0];
 			$o[$i] = " $pin:" . $o[$i] . '>' . $n[$i];
 		}
 	}
@@ -181,7 +187,7 @@ if ( $cmd =~ /(p|o)(\d+)=(\d+)/ ) {
 			;
 
 
-	} elsif ( $what eq 'o' && $p < 288 ) {
+	} elsif ( $what eq 'o' && $p < $BOUNDARY_LENGTH ) {
 		my $o = $p;
 		#$b = substr($old_bsr,0,$o) . reverse $v . substr($old_bsr,$o+length($v));
 		$b = ( "0" x $o ) . reverse $v . ( "0" x ( length($old_bsr) - $o - length($v) ) );
@@ -196,17 +202,17 @@ warn "XXX",length($old_bsr), " == ",length($b);
 	diff_bits( $BSR, $b ), $/;
 
 #	print $sock "irscan x300.tap 0x55\n"; # SAMPLE/PRELOAD
-	print $sock "drscan x300.tap 288 0x", bin2hex($b), "\n";
+	print $sock "drscan x300.tap $BOUNDARY_LENGTH 0x", bin2hex($b), "\n";
 	print $sock "irscan x300.tap 0x00\n"; # EXTEST
-#	print $sock "drscan x300.tap 288 0x", bin2hex($b), "\n";
+#	print $sock "drscan x300.tap $BOUNDARY_LENGTH 0x", bin2hex($b), "\n";
 
 } elsif ( $cmd =~ m/\?/ ) {
 	$last_bits = '';
 	print $sock "irscan x300.tap 0x55\n"; # SAMPLE/PRELOAD
-	print $sock "drscan x300.tap 288 0\n";
+	print $sock "drscan x300.tap $BOUNDARY_LENGTH 0\n";
 } else {
 	print $sock "irscan x300.tap 0x55\n"; # SAMPLE/PRELOAD
-	print $sock "drscan x300.tap 288 0\n";
+	print $sock "drscan x300.tap $BOUNDARY_LENGTH 0\n";
 }
 
 
-- 
2.20.1