Tornado

2
Setup and Startup
a serial connection, try turning off periodic updates in the browser, or else closing
any debugger displays you can spare.
2
Configuring the Target Agent for Serial Connection
To configure the target agent for a raw serial communication connection,
reconfigure and rebuild VxWorks with a serial communication interface for the
target agent (see Configuration for Serial Connection, p.141).
Configuring the Boot Program for Serial Connection
When you connect the host and target exclusively over serial lines, you must
configure and build a boot program for the serial connection because the default
boot configuration uses an FTP download from the host (see 4.7 Configuring and
Building a VxWorks Boot Program, p.144). The simplest way to boot over a serial
connection is by using the Target Server File System. See 2.6.7 Booting a Target
Without a Network, p.53.
Testing the Connection
Be sure to use the right kind of cable to connect your host and target.Use a simple
Tx/Tx/GND serial cable because the host serial port is configured not to use
handshaking. Many targets require a null-modem cable; consult the target-board
documentation. Configure your host-system serial port for a full-duplex (no local
echo), 8-bit connection with one stop bit and no parity bit. The line speed must
match whatever is configured into your target agent.
Before trying to attach the target server for the first time, test that the serial
connection to the target is good. To help verify the connection, the target agent
sends the following message over the serial line when it boots (with
WDB_COMM_SERIAL):
WDB READY
To test the connection, attach a terminal emulator 3 to the target-agent serial port,
then reset the target. If the WDB READY message does not appear, or if it is
garbled, check the configuration of the serial port you are using on your host.
3. Commonly available terminal emulators are tip, cu, and kermit; consult your host reference
documentation.
35