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pigpig5442
2005-03-15 19:25 |
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Linux Platform l Operating System : RedHat, SuSe l Terminal Emulation AP : minicom l Internet Dialer : Kppp Find the available serial ports Since Linux only support 4 serial ports (ttyS0, ttyS1, ttyS2, ttyS3) under the default condition. Most likely, ttyS0 & ttyS1 are supported by mother board's built-in serial controllers and ttyS2 & ttyS3 are free for additional I/O card. Serial ports could be checked by the following commands. setserial /dev/ttyS0 -a (COM-1) setserial /dev/ttyS1 -a (COM-2) setserial /dev/ttyS2 -a (COM-3) setserial /dev/ttyS3 -a (COM-4) If COM-1 is used by mouse, the response is similar to /dev/ttyS0 : Device or resource busy If the COM-1 does not attach any device, the response is similar to /dev/ttyS0, Line 0, UART: 16550A, Port: 0x3f8, irq: 4 Baud_base: 115200, clos_delay: 50, divisor: 0 closing_wait: 3000, closing_wait2: infinite Flags: spd_normal skip_test In case ttyS2 (COM-3) is free, the response for command setserial /dev/ttyS2 -a is shown below. /dev/ttyS2, Line 2, UART: unknown, Port: 0x3e8, irq: 4 Baud_base: 115200, clos_delay: 50, divisor: 0 closing_wait: 3000, closing_wait2: infinite Flags: spd_normal skip_test Find the PCI card resource ( I/O port address & IRQ) for the serial ports Enter the command more /proc/pci The response is similar to the following Bus 0, Device 11, function 0: Serial controller : Unknown vendor Unknown device (rev 01). Vendor id=9710, Device id=9735 Device id=9745 Device id=9820 Device id=9825 Device id=9835 Device id=9845 Medium devsel. Fast back-to-back capable. IRQ 11 Board with Nm9735CV part I/O at 0xc000 [0xc001] serial port 1 0xc008 [0xc009] serial port 2 Board with Nm9745CV part I/O at 0xc000 [0xc001] serial port 1 0xc008 [0xc009] serial port 2 0xc010 [0xc011] device 1 0xc018 [0xc019] device 2 0xc020 [0xc021] device 3 0xc028 [0xc029] device 4 Board with Nm9820CV part I/O at 0xc000 [0xc001] serial port 1 I/O at 0xc400 [0xc401] not used I/O at 0xc800 [0xc801] not used I/O at 0xd000 [0xd001] not used I/O at 0xd400 [0xd401] not used I/O at 0xd800 [0xd801] not used Board with Nm9825CV part I/O at 0xc000 [0xc001] serial port 1 Board with Nm9835CV part I/O at 0xc000 [0xc001] serial port 1 I/O at 0xc400 [0xc401] serial port 2 I/O at 0xc800 [0xc801] not used I/O at 0xd000 [0xd001] not used I/O at 0xd400 [0xd401] not used I/O at 0xd800 [0xd801] not used Board with Nm9845CV part I/O at 0xc000 [0xc001] serial port 1 I/O at 0xc400 [0xc401] serial port 2 I/O at 0xc800 [0xc801] device 1 I/O at 0xd000 [0xd001] device 2 I/O at 0xd400 [0xd401] device 3 I/O at 0xd800 [0xd801] device 4 Board with Nm9755CV part I/O at 0xc000 [0xc001] not used I/O at 0xc400 [0xc401] not used I/O at 0xc800 [0xc801] device 1 I/O at 0xd000 [0xd001] device 2 I/O at 0xd400 [0xd401] device 3 I/O at 0xd800 [0xd801] device 4 From the /proc/pci file, it is possible to find the PCI card's I/O port address and IRQ. Especially, the NetMos parts always shows Vendor id=9710, Device id=9735 Device id=9745 Device id=9820 Device id=9825 Device id=9835 Device id=9845 Configure the parameters for ttyS2 or ttyS3 Enter (if ttyS2 or ttyS3 are free) setserial /dev/ttyS2 port 0xc000 UART 16550A irq 11 Baud_base 115200 setserial /dev/ttyS3 port 0xc008 UART 16550A irq 11 Baud_base 115200 Check the setting for ttyS2 or ttyS3 Type setserial /dev/ttyS2 -a /dev/ttyS2, Line 2, UART: 16550A, Port: 0xc000, irq: 11 Baud_base: 115200, clos_delay: 50, divisor: 0 closing_wait: 3000, closing_wait2: infinite Flags: spd_normal skip_test The ttyS2 or ttyS3 are ready for application  x0
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