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serial_sync_helper.rb
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serial_sync_helper.rb
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# Copyright 2011, 2014 Exavideo LLC.
#
# This file is part of Exaboard.
#
# Exaboard is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Exaboard is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Exaboard. If not, see <http://www.gnu.org/licenses/>.
##
# Helper functions for serial sync classes.
module SerialSyncHelper
##
# Open a serial port, first checking if it's really a valid port.
#
# +options+ is a hash that can include +'port'+ and +'baud'+.
# +default_baud+ is the default baud rate to use if not specified
# in the options.
def open_port(options, default_baud)
port = options['port'] || '/dev/ttyS0'
baud = options['baud'].to_i || default_baud
# check if we really have (something resembling) a serial port
isatty = false
File.open(port, "r") do |f|
if f.isatty
isatty = true
end
end
if isatty
SerialPort.new(port, baud)
else
fail "#{port} is not a serial port"
end
end
end