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The Terminal component is a virtual component that enables UART data to be transferred between a TCP/IP socket on the host and a serial port on the target.
To use the Terminal component with a Microsoft Windows 7 client, you must first install Telnet. The Telnet application is not installed on Microsoft Windows 7 by default.
Download the application by following the instructions on the Microsoft web site. Search for “Windows 7 Telnet” to find the Telnet FAQ page. To install Telnet:
The following figure shows a block diagram of one possible relationship between the target and host through the Terminal component. The TelnetTerminal block is what you configure when you define Terminal component parameters. The Virtual Machine is your FVP.
On the target side, the console process that is invoked by your target OS relies on a suitable driver being present. Such drivers are normally part of the OS kernel. The driver passes serial data through a UART. The data is forwarded to the TelnetTerminal component, which exposes a TCP/IP port to the world outside of the FVP. This port can be connected to by, for example, a Telnet process on the host.
By default, the FVP starts four telnet Terminals when the model is initialized. You can change the startup behavior for each of the four Terminals by modifying the corresponding component parameters.
If the Terminal connection is broken, for example by closing a client telnet session, the
port is re-opened on the host. This might have a different port number if the original one
is no longer available. Before the first data access, you can connect a client of your
choice to the network socket. If there is no existing connection when the first data access
is made, and the
start_telnet parameter is
true, a host
telnet session is started automatically.
The port number of a particular Terminal instance can be defined when the FVP starts. The actual value of the port that is used by each Terminal is declared when it starts or restarts, and might not be the value that you specified if the port is already in use. If you are using Model Shell, the port numbers are displayed in the host window in which you started the model.
You can start the Terminal component in either telnet mode or raw mode.
In telnet mode, the Terminal component supports a subset of the RFC 854 protocol. This means that the Terminal participates in negotiations between the host and client concerning what is and is not supported, but flow control is not implemented.
Raw mode enables the byte stream to pass unmodified between the host and the target. This means that the Terminal component does not participate in initial capability negotiations between the host and client. It acts as a TCP/IP port. You can use this feature to directly connect to your target through the Terminal component.