[SOLVED] switching between RS232 ,RS422,RS485 from linux

golden_boy615 · 12-26-2010, 02:25 AM

Hello
I have a fanless mini PC from Quanmax company with model "QBOX-1010".
it has two serial port that cat act as RS-232 , RS-422 and RS-485. I want to switch between these physical interfaces from my linux that I installed on it. I can switch between them from it's BIOS (It has a menu for it). but I want to do this when I access it remotely and I can not access it's BIOS .I saw some devices that do it from their web, I don't know that they were Linux or not but they do it without restarting and going to it's BIOS.
my OS is ubuntu 10.04 with KERNEL and hardware:

Quote:

uname -a
Linux solmate2 2.6.32-21-generic #32-Ubuntu SMP Fri Apr 16 08:10:02 UTC 2010 i686 GNU/Linux

cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 28
model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz
stepping : 2
cpu MHz : 1600.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm
bogomips : 3200.29
clflush size : 64
cache_alignment : 64
address sizes : 32 bits physical, 32 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 28
model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz
stepping : 2
cpu MHz : 1600.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
apicid : 1
initial apicid : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm
bogomips : 3200.29
clflush size : 64
cache_alignment : 64
address sizes : 32 bits physical, 32 bits virtual
power management:

root@solmate2:~# cat /proc/meminfo
MemTotal: 1018120 kB
MemFree: 577020 kB
Buffers: 26248 kB
Cached: 79812 kB
SwapCached: 0 kB
Active: 74364 kB
Inactive: 72840 kB
Active(anon): 44744 kB
Inactive(anon): 0 kB
Active(file): 29620 kB
Inactive(file): 72840 kB
Unevictable: 0 kB
Mlocked: 0 kB
HighTotal: 130824 kB
HighFree: 2800 kB
LowTotal: 887296 kB
LowFree: 574220 kB
SwapTotal: 2980856 kB
SwapFree: 2980856 kB
Dirty: 92 kB
Writeback: 0 kB
AnonPages: 41148 kB
Mapped: 19580 kB
Shmem: 3596 kB
Slab: 14228 kB
SReclaimable: 4540 kB
SUnreclaim: 9688 kB
KernelStack: 1600 kB
PageTables: 1604 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 3489916 kB
Committed_AS: 333480 kB
VmallocTotal: 122880 kB
VmallocUsed: 22368 kB
VmallocChunk: 95004 kB
HardwareCorrupted: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 4096 kB
DirectMap4k: 20472 kB
DirectMap4M: 888832 kB

lshw
PCI (sysfs)

local
description: Desktop Computer
product: To Be Filled By O.E.M.
vendor: Quanmax Inc.
version: B1
serial: To Be Filled By O.E.M.
width: 32 bits
capabilities: smbios-2.4 dmi-2.4 smp-1.4 smp
configuration: boot=normal chassis=desktop cpus=1 uuid=00020003-0004-0005-0006-000700080009
*-core
description: Motherboard
product: To be filled by O.E.M.
vendor: Quanmax Inc.
physical id: 0
version: B1
serial: To be filled by O.E.M.
slot: To Be Filled By O.E.M.
*-firmware
description: BIOS
vendor: American Megatrends Inc.
physical id: 0
version: 1.12 (07/09/2010)
size: 64KiB
capacity: 960KiB
capabilities: isa pci pnp apm upgrade shadowing escd cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int14serial int17printer int10video acpi usb ls120boot zipboot biosbootspecification
*-cpu
description: CPU
product: Intel(R) Atom(TM) CPU N270 @ 1.60GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: 6.12.2
serial: 0001-06C2-0000-0000-0000-0000
slot: CPU 1
size: 1600MHz
capacity: 1600MHz
width: 32 bits
clock: 133MHz
capabilities: boot fpu fpu_exception wp vme de tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm pse cpufreq
configuration: id=0
*-cache:0
description: L1 cache
physical id: 5
slot: L1-Cache
size: 24KiB
capacity: 24KiB
capabilities: internal write-back data
*-cache:1
description: L2 cache
physical id: 6
slot: L2-Cache
size: 512KiB
capacity: 512KiB
capabilities: internal write-back unified
*-logicalcpu:0
description: Logical CPU
physical id: 0.1
width: 32 bits
capabilities: logical
*-logicalcpu:1
description: Logical CPU
physical id: 0.2
width: 32 bits
capabilities: logical
*-memory
description: System Memory
physical id: c
slot: System board or motherboard
size: 1GiB
*-bank
description: DIMM SDRAM Synchronous
product: PartNum0
vendor: Manufacturer0
physical id: 0
serial: SerNum0
slot: DIMM0
size: 1GiB
width: 64 bits
*-pci
description: Host bridge
product: Mobile 945GME Express Memory Controller Hub
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 03
width: 32 bits
clock: 33MHz
configuration: driver=agpgart-intel
resources: irq:0
*-display:0
description: VGA compatible controller
product: Mobile 945GME Express Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 03
width: 32 bits
clock: 33MHz
capabilities: msi pm bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:16 memory:fea80000-feafffff ioport:dc80(size=8) memory:d0000000-dfffffff(prefetchable) memory:fea40000-fea7ffff
*-display:1 UNCLAIMED
description: Display controller
product: Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2.1
bus info: pci@0000:00:02.1
version: 03
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: latency=0
resources: memory:fe980000-fe9fffff
*-multimedia
description: Audio device
product: N10/ICH 7 Family High Definition Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 02
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=HDA Intel latency=0
resources: irq:16 memory:fea38000-fea3bfff
*-pci:0
description: PCI bridge
product: N10/ICH 7 Family PCI Express Port 1
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm bus_master cap_list
configuration: driver=pcieport
resources: irq:24 ioport:e000(size=4096) memory:feb00000-febfffff ioport:fdf00000(size=1048576)
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
logical name: eth0
version: 02
serial: 00:50:08:03:9c:c2
size: 100MB/s
capacity: 1GB/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=192.168.8.132 latency=0 link=yes multicast=yes port=MII speed=100MB/s
resources: irq:25 ioport:ec00(size=256) memory:febff000-febfffff memory:fdff0000-fdffffff(prefetchable) memory:febc0000-febdffff(prefetchable)
*-usb:0
description: USB Controller
product: N10/ICH7 Family USB UHCI Controller #1
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:23 ioport:dc00(size=32)
*-usb:1
description: USB Controller
product: N10/ICH 7 Family USB UHCI Controller #2
vendor: Intel Corporation
physical id: 1d.1
bus info: pci@0000:00:1d.1
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:19 ioport:d880(size=32)
*-usb:2
description: USB Controller
product: N10/ICH 7 Family USB UHCI Controller #3
vendor: Intel Corporation
physical id: 1d.2
bus info: pci@0000:00:1d.2
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:18 ioport:d800(size=32)
*-usb:3
description: USB Controller
product: N10/ICH 7 Family USB UHCI Controller #4
vendor: Intel Corporation
physical id: 1d.3
bus info: pci@0000:00:1d.3
version: 02
width: 32 bits
clock: 33MHz
capabilities: bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:16 ioport:d480(size=32)
*-usb:4
description: USB Controller
product: N10/ICH 7 Family USB2 EHCI Controller
vendor: Intel Corporation
physical id: 1d.7
bus info: pci@0000:00:1d.7
version: 02
width: 32 bits
clock: 33MHz
capabilities: pm debug bus_master cap_list
configuration: driver=ehci_hcd latency=0
resources: irq:23 memory:fea37c00-fea37fff
*-pci:1
description: PCI bridge
product: 82801 Mobile PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@0000:00:1e.0
version: e2
width: 32 bits
clock: 33MHz
capabilities: pci bus_master cap_list
*-isa
description: ISA bridge
product: 82801GBM (ICH7-M) LPC Interface Bridge
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 02
width: 32 bits
clock: 33MHz
capabilities: isa bus_master cap_list
configuration: latency=0
*-ide
description: IDE interface
product: 82801GBM/GHM (ICH7 Family) SATA IDE Controller
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
logical name: scsi0
version: 02
width: 32 bits
clock: 66MHz
capabilities: ide pm bus_master cap_list emulated
configuration: driver=ata_piix latency=0
resources: irq:19 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:ffa0(size=16)
*-disk
description: ATA Disk
product: WDC WD1600BEVT-2
vendor: Western Digital
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: 11.0
serial: WD-WXF0EA9TP192
size: 149GiB (160GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=0004cd6a
*-volume:0
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
logical name: /
version: 1.0
serial: 2d4637c3-b7ec-4373-b07a-b2247fe4e786
size: 146GiB
capacity: 146GiB
capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2002-01-05 05:14:53 filesystem=ext4 lastmountpoint=/�ꥅ�H��A��u^ �U/��~!��a modified=2010-12-22 10:16:39 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,barrier=1,data=ordered mounted=2010-12-25 16:35:18 state=mounted
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
size: 2911MiB
capacity: 2911MiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume
description: Linux swap / Solaris partition
physical id: 5
logical name: /dev/sda5
capacity: 2911MiB
capabilities: nofs
*-serial UNCLAIMED
description: SMBus
product: N10/ICH 7 Family SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 02
width: 32 bits
clock: 33MHz
configuration: latency=0
resources: ioport:400(size=32)

Thanks for any answer.

michaelk · 12-26-2010, 07:58 AM

I am unfamiliar with this mini-PC and unable to access any information from Quanmax's website. The devices I am most familiar with either are fixed or have programmable ports.

golden_boy615 · 12-26-2010, 12:34 PM

may be I asked wrong.
I want to effect those things that BIOS configuration does, but from Linux OS without rebooting and going to BIOS screen.
because I saw some software in win that do the same so I thought it has a way in Linux too.

michaelk · 12-26-2010, 02:32 PM

/dev/nvram allows one to change CMOS settings. However, since AFAIK there is no standard memory map so I can not say what bit requires changing.

http://www.pixelbeat.org/docs/bios/

jefro · 12-26-2010, 10:03 PM

The last time I saw a programmable card like that it had a small 8080 processor on it. I'd guess the bios controls more than a simple circuit but it was a long time ago. I'd think if it could be controlled by a OS then the company would have at least some dos or other windows app to change it on the fly.

Email the company and they might know if it could be done.