mirror of
https://github.com/ZoneMinder/zoneminder.git
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173 lines
4.2 KiB
Perl
173 lines
4.2 KiB
Perl
# ==========================================================================
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#
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# ZoneMinder Trigger Channel Handle Module, $Date$, $Revision$
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# Copyright (C) 2001-2008 Philip Coombes
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# ==========================================================================
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#
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# This module contains the class definition of the serial port trigger channel
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# class
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#
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package ZoneMinder::Trigger::Channel::Serial;
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use 5.006;
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use strict;
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use warnings;
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require ZoneMinder::Base;
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require ZoneMinder::Trigger::Channel;
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our @ISA = qw(ZoneMinder::Trigger::Channel);
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our $VERSION = $ZoneMinder::Base::VERSION;
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# ==========================================================================
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#
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# Serial access trigger channel
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#
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# ==========================================================================
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use ZoneMinder::Logger qw(:all);
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use Device::SerialPort;
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sub new
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{
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my $class = shift;
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my %params = @_;
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my $self = ZoneMinder::Trigger::Channel->new;
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$self->{path} = $params{path};
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bless( $self, $class );
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return $self;
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}
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sub open
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{
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my $self = shift;
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my $device = new Device::SerialPort( $self->{path} );
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if ( ! $device )
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{
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Error( "Unable to open $$self{path}: $!" );
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$self->{state} = 'closed';
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return;
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}
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$device->baudrate(9600);
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$device->databits(8);
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$device->parity('none');
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$device->stopbits(1);
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$device->handshake('none');
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$device->read_const_time(50);
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$device->read_char_time(10);
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$self->{device} = $device;
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$self->{state} = 'open';
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$self->{state} = 'connected';
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}
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sub close
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{
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my $self = shift;
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$self->{device}->close();
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$self->{state} = 'closed';
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}
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sub read
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{
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my $self = shift;
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my $buffer = $self->{device}->lookfor();
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if ( !$buffer || !length($buffer) )
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{
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return( undef );
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}
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Debug( "Read '$buffer' (".length($buffer)." bytes)\n" );
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return( $buffer );
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}
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sub write
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{
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my $self = shift;
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my $buffer = shift;
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my $nbytes = $self->{device}->write( $buffer );
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$self->{device}->write_drain();
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if ( !defined( $nbytes) || $nbytes < length($buffer) )
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{
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Error( "Unable to write buffer '".$buffer
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.", expected "
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.length($buffer)
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." bytes, sent "
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.$nbytes
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.": $!\n"
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);
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return( undef );
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}
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Debug( "Wrote '$buffer' ($nbytes bytes)\n" );
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return( !undef );
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}
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1;
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__END__
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# Below is stub documentation for your module. You'd better edit it!
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=head1 NAME
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ZoneMinder::Database - Perl extension for blah blah blah
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=head1 SYNOPSIS
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use ZoneMinder::Database;
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blah blah blah
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=head1 DESCRIPTION
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Stub documentation for ZoneMinder, created by h2xs. It looks like the
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author of the extension was negligent enough to leave the stub
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unedited.
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Blah blah blah.
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=head2 EXPORT
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None by default.
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=head1 SEE ALSO
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Mention other useful documentation such as the documentation of
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related modules or operating system documentation (such as man pages
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in UNIX), or any relevant external documentation such as RFCs or
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standards.
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If you have a mailing list set up for your module, mention it here.
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If you have a web site set up for your module, mention it here.
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=head1 AUTHOR
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Philip Coombes, E<lt>philip.coombes@zoneminder.comE<gt>
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=head1 COPYRIGHT AND LICENSE
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Copyright (C) 2001-2008 Philip Coombes
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This library is free software; you can redistribute it and/or modify
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it under the same terms as Perl itself, either Perl version 5.8.3 or,
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at your option, any later version of Perl 5 you may have available.
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=cut
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