Serieports kort, som inte dyker upp automagiskt i Ubuntu Server. Man kan se kortet med ”lspci”:
00:00.0 Host bridge: Intel Corporation 82815 815 Chipset Host Bridge and Memory Controller Hub (rev 02) 00:02.0 VGA compatible controller: Intel Corporation 82815 Chipset Graphics Controller (CGC) (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801AA PCI Bridge (rev 02) 00:1f.0 ISA bridge: Intel Corporation 82801AA ISA Bridge (LPC) (rev 02) 00:1f.1 IDE interface: Intel Corporation 82801AA IDE Controller (rev 02) 00:1f.2 USB Controller: Intel Corporation 82801AA USB Controller (rev 02) 00:1f.3 SMBus: Intel Corporation 82801AA SMBus Controller (rev 02) 00:1f.5 Multimedia audio controller: Intel Corporation 82801AA AC'97 Audio Controller (rev 02) 01:00.0 Serial controller: Timedia Technology Co Ltd PCI2S550 (Dual 16550 UART) (rev 01) 01:01.0 Serial controller: NetMos Technology PCI 9865 Multi-I/O Controller 01:01.1 Serial controller: NetMos Technology PCI 9865 Multi-I/O Controller 01:01.2 Communication controller: NetMos Technology PCI 9865 Multi-I/O Controller 01:02.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10) 01:04.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 78)
Men det dyker inte upp några device, /dev/ttySxxx. Den nedan är redan befintliga serieportar, två stycken på moderkort och två på annat externt PCI kort.
sm3sgp@fernebo:~$ dmesg | grep tty [ 0.000000] console [tty0] enabled [ 0.413560] serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 0.413718] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A [ 0.415409] 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A [ 0.415686] 00:0a: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A [ 0.416708] 0000:01:00.0: ttyS4 at I/O 0x2480 (irq = 11) is a 16550A [ 0.470012] 0000:01:00.0: ttyS5 at I/O 0x2488 (irq = 11) is a 16550A
För att enabla fler portar i kärnan krävs att man ger en boot option, 8250.nr_uarts=16. Editera menus.lst för grub:
# kopt=root=UUID=xxxxxxxxxxxxxxx ro 8250.nr_uarts=16
Observera att # ska vara kvar. Man ska nu se flera ttySxxx under /dev
sm3sgp@fernebo:/etc/rcS.d$ ls -l /dev/ttyS* crw-rw---- 1 root dialout 4, 64 2010-08-08 14:30 /dev/ttyS0 crw-rw---- 1 root dialout 4, 65 2010-08-08 14:30 /dev/ttyS1 crw-rw---- 1 root dialout 4, 74 2010-08-08 14:30 /dev/ttyS10 crw-rw---- 1 root dialout 4, 75 2010-08-08 14:30 /dev/ttyS11 crw-rw---- 1 root dialout 4, 76 2010-08-08 14:30 /dev/ttyS12 crw-rw---- 1 root dialout 4, 77 2010-08-08 14:30 /dev/ttyS13 crw-rw---- 1 root dialout 4, 78 2010-08-08 14:30 /dev/ttyS14 crw-rw---- 1 root dialout 4, 79 2010-08-08 14:30 /dev/ttyS15 crw-rw---- 1 root dialout 4, 66 2010-08-08 14:30 /dev/ttyS2 crw-rw---- 1 root dialout 4, 67 2010-08-08 14:30 /dev/ttyS3 crw-rw---- 1 root dialout 4, 68 2010-08-08 14:30 /dev/ttyS4 crw-rw---- 1 root dialout 4, 69 2010-08-08 14:30 /dev/ttyS5 crw-rw---- 1 root dialout 4, 70 2010-08-08 15:02 /dev/ttyS6 crw-rw---- 1 root dialout 4, 71 2010-08-08 14:30 /dev/ttyS7 crw-rw---- 1 root dialout 4, 72 2010-08-08 14:30 /dev/ttyS8 crw-rw---- 1 root dialout 4, 73 2010-08-08 14:30 /dev/ttyS9
Använd setserial för att aktivera portarna:
sudo setserial /dev/ttyS9 port 0x24c0 UART 16550A irq 10 Baud_base 115200
Dessa portar är använda.
01:01.2 Communication controller: NetMos Technology PCI 9865 Multi-I/O Controller
Subsystem: Device a000:3002
Flags: medium devsel, IRQ 10
I/O ports at 24d8 [size=8]
I/O ports at 24d0 [size=8]
I/O ports at 24c8 [size=8]
I/O ports at 24c0 [size=8]
Memory at ec104000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Ändra till manuell konfigurering:
sudo dpkg-reconfigure setserial
Editera /var/lib/setserial/autoserial.conf med följande:
/dev/ttyS0 uart 16550A port 0x03f8 irq 4 baud_base 115200 spd_normal skip_test /dev/ttyS1 uart 16550A port 0x02f8 irq 3 baud_base 115200 spd_normal skip_test /dev/ttyS2 uart 16550A port 0x24c8 irq 5 baud_base 115200 spd_normal skip_test /dev/ttyS3 uart 16550A port 0x24c0 irq 5 baud_base 115200 spd_normal skip_test /dev/ttyS4 uart 16550A port 0x24b8 irq 5 baud_base 115200 spd_normal skip_test /dev/ttyS5 uart 16550A port 0x24b0 irq 5 baud_base 115200 spd_normal skip_test /dev/ttyS6 uart 16550A port 0x2480 irq 5 baud_base 921600 spd_normal skip_test /dev/ttyS7 uart 16550A port 0x2488 irq 5 baud_base 921600 spd_normal skip_test
Kopiera /var/lib/setserial/autoserial.conf till serial.conf
sudo cp /var/lib/setserial/autoserial.conf /etc/serial.conf