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package RPi::Serial; |
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21646
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use 5.006; |
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use strict; |
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use warnings; |
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use parent 'WiringPi::API'; |
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our $VERSION = '0.01'; |
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sub new { |
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my ($class, $device, $baud) = @_; |
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my $self = bless {}, $class; |
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$self->fd($self->serial_open($device, $baud)); |
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return $self; |
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} |
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sub close { |
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$_[0]->serial_close($_[0]->fd); |
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} |
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sub avail { |
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return $_[0]->serial_data_avail($_[0]->fd); |
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} |
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sub fd { |
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my $self = shift; |
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$self->{fd} = shift if @_; |
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return $self->{fd}; |
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} |
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sub flush { |
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$_[0]->serial_flush($_[0]->fd); |
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} |
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sub putc { |
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$_[0]->serial_put_char($_[0]->fd, $_[1]); |
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} |
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sub puts { |
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$_[0]->serial_puts($_[0]->fd, $_[1]); |
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} |
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sub getc { |
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return $_[0]->serial_get_char($_[0]->fd); |
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} |
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sub gets { |
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return $_[0]->serial_gets($_[0]->fd, $_[1]); |
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} |
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sub __placeholder {} # vim folds |
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1; |
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=head1 NAME |
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RPi::Serial - Basic read/write interface to a serial port |
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=head1 SYNOPSIS |
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use RPi::Serial; |
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my $dev = "/dev/ttyAMA0"; |
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my $baud = 115200; |
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my $ser = RPi::Serial->new($dev, $baud); |
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$ser->putc(5); |
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$ser->puts("hello, world!"); |
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my $char = $ser->getc; |
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my $num_bytes = 12; |
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my $str = $ser->gets($num_bytes); |
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$ser->flush; |
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my $bytes_available = $ser->avail; |
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$ser->close; |
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=head1 METHODS |
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=head2 new($device, $baud); |
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Opens the specified serial port at the specified baud rate, and returns a new |
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L object. |
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Parameters: |
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$device |
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Mandatory, String: The serial device to open (eg: C<"/dev/ttyAMA0">. |
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$baud |
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Mandatory, Integer: A valud baud rate to use. |
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=head2 close |
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Closes an already open serial device. |
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=head2 avail |
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Returns the number of bytes waiting to be read if any. |
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=head2 flush |
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Flush any data currently in the serial buffer. |
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=head2 fd |
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Returns the C file descriptor for the current serial object. |
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107
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=head2 getc |
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109
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Retrieve a single character from the serial port. |
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111
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=head2 gets($num_bytes) |
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Read a specified number of bytes into a string. |
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Parameters: |
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$num_bytes |
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Mandatory, Integer; The number of bytes to read. If this number is larger than |
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what is available to be read, a 10 second timeout will briefly hand your |
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application. |
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123
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=head2 putc($char) |
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Writes a single character to the serial device. |
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127
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Parameters: |
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129
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$char |
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Mandatory, Unsigned Char: The character to write to the port. |
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=head2 puts($string) |
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Write a character string to the serial device. |
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Parameters: |
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139
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$string |
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Mandatory, String: Whatever you want to write to the serial line. |
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=head1 AUTHOR |
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Steve Bertrand, C<< >> |
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147
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=head1 LICENSE AND COPYRIGHT |
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149
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Copyright 2017 Steve Bertrand. |
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This program is free software; you can redistribute it and/or modify it |
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under the terms of either: the GNU General Public License as published |
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by the Free Software Foundation; or the Artistic License. |
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See L for more information. |