User`s guide

Chapter 7: Configuration 71
Properties and Parameters
• Show advanced: Displays all the settings in the GPI Settings frame.
• Box Type: Select the type of GPI box that is being configured. The Box Type
can be set to SRC-8, SRC-8 III or SeaLevel.
• Port: Sets the port that the GPI box is connected to. The Port can be set to
COM1-COM17, or None.
• Base Entry: This is the node in the Media Sequencer’s data structure where the
systems look for the GPI actions. The base entry is by default set to /sys/gpi.
• Baudrate: Sets the maximum rate of bits per second (bps) that you want data
to be transmitted through this port. The Baudrate can be set to 110-921600.
It is recommended to use the highest rate that is supported by the computer
or device that is being used.
• Stopbits: Sets the interval (bps) for when characters should be transmitted.
Stopbits can be set to 1, 1.5, or 2.
• Databits: Sets the number of databits that should be used for each transmitted
and received character. The communicating computer or device must have the
same setting. The number of databits can be set to 5, 6, 7 or 8.
• Parity: Changes the type of error checking that is used for the selected port.
The communicating computer or device must have the same setting. The
parity can be set to:
• Even: A parity bit may be added to make the number of 1's in the data bits
even. This will enable error checking.
• Odd: A parity bit may be added to make the number of 1's in the data bits
odd. This will enable error checking.
• None: No parity bit will be added to the data bits sent from this port. This
will disable error checking.
• Mark: A parity bit set to 0 will be added.
• Space: A parity bit set to 1 will be added.
• Flowcontrol: Changes how the flow of data is controlled. The Flowcontrol can
be set to:
• None: No control of dataflow.
• XonXoff: Standard method of controlling the flow of data between two
modems. XonXoff flowcontrol is sometimes referred to as software
handshaking
• Hardware: Standard method of controlling the flow of data between a
computer and a serial device. Hardware flowcontrol is sometimes referred
to as hardware handshaking.
• Verbose: If enabled, Media Sequencer’s GPI handler outputs log information.
This information is useful for debugging.
• Reversed Input Order: Note that this check box is only available if Box Type is
set to SRC-8. If enabled, the signal line that originally triggered GPI action
DL0/DH0 will now trigger GPI action DL7/DH7, the signal line that originally
triggered GPI action DL1/DH1 will now trigger GPI action DL6/DH6, and so on.