[[Kategorie:Index]]  RS-232 ist ein Standard für eine bei Computern früher weit verbreitete serielle Schnittstelle, die in den frühen 1960ern von einem US-amerikanischen Standardisierungskomitee eingeführt wurde. In heutiger Zeit findet Sie sich noch in Serverhardware, professionellem Netzwerk-Equipment , Industrie-Systemen und Embedded-Devices.

Unter Linux können mehrere Programme für die Verbindung verwendet werden:*screen*minicom*... Im Folgenden ein kurzes Beispiel, was eine [[Vu+ Duo²]] beim Starten auf die serielle Konsole ausgibt. Diese Informationen wurden der Übersichlichkeit wegen abgeschnitten und es werden auch im laufenden Betrieb noch weiterhin Informationen ausgegeben, welche zur Systemanalyse herangezogen werden können. 'ttyUSB0' ist der Name des verwendeten USB-Adapters auf dem Client. Beispiel: <ToDopre># minicom -D /dev/ttyUSB0 -b 115200 -8 Welcome to minicom 2.7 OPTIONS: I18n Port /dev/ttyUSB0, 18:50:43 Press CTRL-A Z for help on special keys  BCM74250012 M0M101CZL2=1LLMB=0000C000BP=02000000L2Cfg=1E7AD627L2Buf=77707711BrCfg=F01C200EBrMod=02800801BrZp0=44000000BrZp1=00002000#@ CFE ver 2.333.20130710, Endian Mode: LittleBuild Date: Mon Jul 15 19:29:18 2013 Vuplus TeamCopyright (C) Broadcom Corporation. CPU speed: 1305MHzDDR Frequency: 800 MHzDDR Mode: DDR3Total memory(MEMC 0): 1024MBMEMC 0 DDR Width: 32Total memory(MEMC 1): 1024MBMEMC 1 DDR Width: 32Boot Device: NANDTotal flash: 512MBRTS VERSION: 20120919184252_7425_single_encodeETH0_PHY: RGMIIETH0_MDIO_MODE: 1ETH0_SPEED: 1000ETH0_PHYADDR: probe SCB CLOCK = 277MHzInitializing USB.USB: Locating Class 09 Vendor 0000 Product 0000: USB Root HubUSB: Locating Class 09 Vendor 0000 Product 0000: USB Root HubUSB: Locating Class 09 Vendor 0000 Product 0000: USB Root HubUSB: Locating Class 09 Vendor 0000 Product 0000: USB Root Hub CFE initialized.USB: New device connected to bus 3 hub 1 port 1USB: Resetting device on bus 3 hub 1 port 1USB: Locating Class FF Vendor 148F Product 5372: Driver not found.waiting for usb...donechecking usbNo Priority Usbchecking front keyChecking usbdisk0:/vuplus/duo2/ignore.update......NOChecking usbdisk0:/vuplus/duo2/force.update......NOChecking usbdisk0:/vuplus/duo2/cfe_cfe_auto.bin......NOChecking usbdisk0:/vuplus/duo2/root_cfe_auto.bin......NOChecking usbdisk0:/vuplus/duo2/splash_cfe_auto.bin......NOChecking usbdisk0:/vuplus/duo2/kernel_cfe_auto.bin......NOStarting splash screen.Found splash image - Width = 720 Height = 480Non Interlaced Replace list 043f8100 0c800000Interlaced Replace list 043f86a0 0c8005a0Loader:elf Filesys:raw Dev:flash0.kernel File: Options:ubiroot rootflags=sync bmem=192M@64M bmem=458M@512M memc1=590MLoading: 0x80001000/7994368 0x807a0c00/210848 Entry address is 0x805e2650Starting program at 0x805e2650 Linux version 3.13.5 (plnick@build-plnick) (gcc version 4.6.4 20120303 (prerelease) (GCC) ) #1 SMP Wed Nov 26 18:52:4Fetching vars from bootloader... found 17 vars.Options: moca=0 sata=1 pcie=0 usb=1Using 1024 MB + 1024 MB RAM (from CFE)bootconsole [early0] enabledCPU0 revision is: 00025a11 (Brcm4380 Broadcom BMIPS5000)FPU revision is: 00130001Determined physical RAM map: memory: 10000000 @ 00000000 (usable) memory: 30000000 @ 20000000 (usable) memory: 31400000 @ 90000000 (usable)bmem: adding 192 MB RESERVED region at 64 MB (0x0c000000@0x04000000)bmem: adding 220 MB RESERVED region at 512 MB (0x0dc00000@0x20000000)Zone ranges: Normal [mem 0x00000000-0x4fffffff] HighMem [mem 0x50000000-0xc13fffff]Movable zone start for each nodeEarly memory node ranges node 0: [mem 0x00000000-0x0fffffff] node 0: [mem 0x20000000-0x4fffffff] node 0: [mem 0x90000000-0xc13fffff]Primary instruction cache 32kB, physically tagged, 4-way, linesize 64 bytes.Primary data cache 32kB, 4-way, linesize 32 bytes.MIPS secondary cache 256kB, 8-way, linesize 128 bytes.PERCPU: Embedded 7 pages/cpu @82012000 s7168 r8192 d13312 u32768Built 1 zonelists in Zone order, mobility grouping on. Total pages: 461824Kernel command line: libata.force=1:1.5Gbps bmem=192M@64M bmem=220M@512M memc1=788M ubi.mtd=0 root=ubi0:rootfs rootfcPID hash table entries: 4096 (order: 2, 16384 bytes)Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)Memory: 1408272K/1855488K available (6068K kernel code, 319K rwdata, 1208K rodata, 260K init, 144K bss, 447216K rese)Hierarchical RCU implementation.NR_IRQS:160Measuring MIPS counter frequency...Detected MIPS clock frequency: 1305 MHz (163.126 MHz counter)Calibrating delay loop... 864.25 BogoMIPS (lpj=432128)pid_max: default: 32768 minimum: 301Mount-cache hash table entries: 512SMP: Booting CPU1...CPU1 revision is: 00025a11 (Brcm4380 Broadcom BMIPS5000)FPU revision is: 00130001Primary instruction cache 32kB, physically tagged, 4-way, linesize 64 bytes.Primary data cache 32kB, 4-way, linesize 32 bytes.MIPS secondary cache 256kB, 8-way, linesize 128 bytes.SMP: CPU1 is runningBrought up 2 CPUsdevtmpfs: initializedbmem: adding extra 236 MB RESERVED region at 3092 MB (0x0ec00000@0xc1400000)NET: Registered protocol family 16USB0: power enable is active high; overcurrent is active lowUSB1: power enable is active high; overcurrent is active lowbio: create slab <bio-0> at 0SCSI subsystem initializedusbcore: registered new interface driver usbfsusbcore: registered new interface driver hubusbcore: registered new device driver usbLinux video capture interface: v2.00Advanced Linux Sound Architecture Driver Initialized.cfg80211: Calling CRDA to update world regulatory domainSwitched to clocksource wktmrFS-Cache: LoadedNET: Registered protocol family 2TCP established hash table entries: 8192 (order: 3, 32768 bytes)TCP bind hash table entries: 8192 (order: 4, 65536 bytes)TCP: Hash tables configured (established 8192 bind 8192)TCP: reno registeredUDP hash table entries: 512 (order: 2, 16384 bytes)UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)NET: Registered protocol family 1RPC: Registered named UNIX socket transport module.RPC: Registered udp transport module.RPC: Registered tcp transport module.RPC: Registered tcp NFSv4.1 backchannel transport module.bounce pool size: 64 pagesNFS: Registering the id_resolver key typeKey type id_resolver registeredKey type id_legacy registerednfs4filelayout_init: NFSv4 File Layout Driver Registering...Installing knfsd (copyright (C) 1996 okir@monad.swb.de).msgmni has been set to 1174io scheduler noop registeredio scheduler cfq registered (default)Serial: 8250/16550 driver, 4 ports, IRQ sharing disabledconsole [ttyS0] enabledMMIO 0x10406b00 (irq = 62, base_baud = 5062500) is a 16550Aconsole [ttyS0] enabledbootconsole [early0] disabledbootconsole [early0] disabledserial8250.0: ttyS1 at MMIO 0x10406b40 (irq = 63, base_baud = 5062500) is a 16550Aserial8250.0: ttyS2 at MMIO 0x10406b80 (irq = 64, base_baud = 5062500) is a 16550Aloop: module loaded[...]</pre> =Links=*[http://www.cyberciti.biz/faq/unix-linux-apple-osx-bsd-screen-set-baud-rate/ Screen Command: Set Baud Rate (Terminal Communication)] *[https://wiki.archlinux.org/index.php/Working_with_the_serial_console Working with the serial console]