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118 lines
2.5 KiB
Perl
Executable File
118 lines
2.5 KiB
Perl
Executable File
#!/usr/bin/perl
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#
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# xdltap - Route nets from inside the FPGA to I/O pads
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#
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# Written 2011 by Werner Almesberger
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# Copyright 2011 by Werner Almesberger
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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sub change
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{
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local ($s, $v, $from, $to) = @_;
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if (defined $from) {
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die "${v}::$from not found in\n$s"
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unless $s =~ /\b${v}::$from/;
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return "$`${v}::$to$'";
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} else {
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die "${v}::... not found in\n$s"
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unless $s =~ /\b${v}::\S+/;
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return "$`${v}::$to$'";
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}
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}
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sub change_var
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{
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local ($s, $from, $to) = @_;
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die "${from}::... not found in\n$s"
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unless $s =~ /\b${from}::/;
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return "$`${to}::$'";
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}
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sub reassign
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{
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local ($s, $from, $to) = @_;
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$s =~ s/\bINBUF:${to}_IBUF:/OUTBUF:${to}_OBUF:/ ||
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die "INBUF:${to}_IBUF: not found in\n$s";
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$s =~ s/\bPULL:${to}_PULLDOWN:// ||
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die "PULL:${to}_PULLDOWN: not found in\n$s";
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$s =~ s/\bIMUX:[^:]+:I/IMUX::#OFF/ ||
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die "IMUX:...:I not found in\n$s";
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$s = &change($s, "BYPASS_MUX", "I", "#OFF");
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$s = &change($s, "DRIVEATTRBOX", "#OFF", "12");
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$s = &change($s, "OUSED", "#OFF", "0");
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$s = &change($s, "PULLTYPE", "PULLDOWN", "#OFF");
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$s = &change($s, "SLEW", "#OFF", "SLOW");
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$s = &change($s, "SUSPEND", "#OFF", "3STATE");
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$s = &change_var($s, "ISTANDARD", "OSTANDARD");
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return $s;
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}
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sub usage
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{
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print STDERR <<"END"
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usage: $0 [net=output ...] [file]
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net fully qualified path to the signal in question, e.g.,
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usb/sie/rx_pending
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output name of the (input) connected to the output pin, e.g., exp<8>
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For better shell compatibility, { and } can be used instead of < and >
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END
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;
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exit(1);
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}
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&usage if $ARGV[0] =~ /^-/;
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while ($ARGV[0] =~ /=/) {
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($from, $to) = ($`, $');
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$to =~ tr/{}/<>/;
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$from{$from} = $to;
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$to{$to} = $from;
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$need{$from} = $need{$to} = 1;
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shift @ARGV;
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}
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while (<>) {
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if ($_ =~ /^inst "([^"]*)"/ && defined $to{$1}) {
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die "" unless $need{$1};
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delete $need{$1};
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$s = $_;
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while (!/;\s*$/) {
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$_ = <>;
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$s .= $_;
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}
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print &reassign($s, $to{$1}, $1) || die "write: $!";
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next;
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}
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if (/^net "([^"]*)_IBUF"/ && defined $to{$1}) {
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next if /;\s*$/;
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while (<>) {
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last if /;\s*$/;
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}
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next;
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}
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print || die "write: $!";
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if (/^net "([^"]*)"/) {
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next unless defined $from{$1};
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die unless $need{$1};
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delete $need{$1};
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print " inpin \"$from{$1}\" O,\n" || die "write: $!";
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}
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}
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die "not found: ".join(", ", sort keys %need) if %need;
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