The Linux Development Platform Configuring, Using, and ... - Classes

CH08.fm Page 255 Monday, October 7, 2002 9:16 PM
Connecting to Target 255
Table 8-1 Null modem connection for DB-9 connector serial cable
DB-9 pin number (Host)
DB-9 pin number (Target)
TXD (3) RXD (2)
RXD (2) TXD (3)
RTS (7) CTS (8)
CTS (8) RTS (7)
Signal Ground (5) Signal Ground (5)
DSR (6) DTR (4)
DTR (4) DSR (6)
For a DB-25 connector, the cable connections are as listed in Table 8-2.
Table 8-2 Null modem connection for DB-25 connector serial cable
DB-25 pin number (Host)
DB-25 pin number (Target)
Frame Ground (1) Frame Ground (1)
TXD (2) RXD (3)
RXD (3) TXD (2)
RTS (4) CTS (5)
CTS (5) RTS (4)
Signal Ground (7) Signal Ground (7)
DSR (6) DTR (20)
DTR (20) DSR (6)
8.5.2 Attaching to a Running Process Using gdbserver
Using the gdbserver program, you can also connect to a running process on the target.
For example, the following command can be executed on the target to connect to a process with
process ID equal to 375.
gdbserver /dev/ttyS1 375
You can also use the TCP/IP connection by replacing the /dev/ttyS1 with hostname:port
number as you have seen earlier.