Class COM_ABSTRACT_DEVICE

-- Current control parameters for this device

-- Last Boolean read by the device

-- Last character read by the device.

-- Last double read by the device

-- Last integer read by the device

-- Number of bytes actually read during last read operation.

-- Last real read by the device

-- Last string read by the device.

-- Number of bytes actually written during last write operation.

-- Name of the communications device

-- Current timeout properties for this device

-- Is the device open for reading and writing?

-- Did the last read/write operation timeout?

-- Close the device.

-- Open the device. If open was successful set is_open.

-- Configures the device according to the specifications in a_settings.
-- Settings will be immediately applied; input and output queues will
-- not be emptied.

-- Configures the timeout properties according to a_timeouts

-- Read a new Boolean. Make result available in last_boolean

-- Read a new character. Make result available in last_character.

-- Read count bytes into the data buffer. Set last_read_count
-- to the number of bytes read. Set timed_out if less than count
-- bytes were read. See timeouts to determine when read will
-- be completed.

-- Read a new double. Make result available in last_double.

-- Read a new integer. Make result available in last_integer.

-- Read characters until a new line is received or a time
-- out occurs. Make result available in last_string.

-- Read a new real. Make result available in last_real.

-- Read a string of count characters.
-- Make result available in last_string.

-- Read characters until a Nul character is received or
-- a time out occurs. Make result available in
-- last_string. Do not include the Nul character.

-- Write b to the device.

-- Write c to medium.

-- Write data to the device. Set last_write_count with the
-- number of bytes written. Set timed_out if the write operation
-- timed out.

-- Write d to the device.

-- Write i to the device.

-- Write a new line character to medium

-- Write r to the device.

-- Write count bytes of s to medium.

-- Write a null terminated string s to medium. All count
-- characters of s will be written, followed by a null.