Control DC Motor (start and stop) with LabView

I never used Lab View before. For a project, we have to use Lab View to make a small dc motor （HP:1/2， RPM 1725) start, and stop. I have no idea how to do this. Any advice/help anyone? Any tutorial or vi. would help!

Hi there,
Search for “H-bridge” for a common DC motor control circuit, the input terminals from the bridge can be controlled using any DAQ device with digital output lines from LabVIEW. For example: https://decibel.ni.com/content/docs/DOC-17062
Regards,
Alejandro | Academic Program Engineer | National Instruments

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karol wrote:Can you post /var/log/Xorg.0.log?
[ 6504.874]
X.Org X Server 1.10.3
Release Date: 2011-07-08
[ 6504.875] X Protocol Version 11, Revision 0
[ 6504.875] Build Operating System: Linux 2.6.39-ARCH x86_64
[ 6504.875] Current Operating System: Linux mordor 2.6.39-ARCH #1 SMP PREEMPT Sat Jul 9 14:57:41 CEST 2011 x86_64
[ 6504.875] Kernel command line: root=/dev/disk/by-uuid/8084cf06-452a-4e04-a89a-0f017461b727 ro
[ 6504.875] Build Date: 09 July 2011 07:52:32AM
[ 6504.875]
[ 6504.875] Current version of pixman: 0.22.2
[ 6504.876] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 6504.876] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 6504.877] (==) Log file: "/var/log/Xorg.0.log", Time: Thu Jul 21 02:12:32 2011
[ 6504.877] (==) Using config file: "/etc/X11/xorg.conf"
[ 6504.877] (==) Using config directory: "/etc/X11/xorg.conf.d"
[ 6504.877] (==) ServerLayout "Layout0"
[ 6504.877] (**) |-->Screen "Screen0" (0)
[ 6504.877] (**) | |-->Monitor "Monitor0"
[ 6504.878] (**) | |-->Device "Device0"
[ 6504.878] (**) |-->Input Device "Keyboard0"
[ 6504.878] (**) |-->Input Device "Mouse0"
[ 6504.878] (==) Automatically adding devices
[ 6504.878] (==) Automatically enabling devices
[ 6504.878] (WW) The directory "/usr/share/fonts/OTF/" does not exist.
[ 6504.878] Entry deleted from font path.
[ 6504.878] (==) FontPath set to:
/usr/share/fonts/misc/,
/usr/share/fonts/TTF/,
/usr/share/fonts/Type1/,
/usr/share/fonts/100dpi/,
/usr/share/fonts/75dpi/
[ 6504.878] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 6504.878] (WW) Hotplugging is on, devices using drivers 'kbd', 'mouse' or 'vmmouse' will be disabled.
[ 6504.878] (WW) Disabling Keyboard0
[ 6504.878] (WW) Disabling Mouse0
[ 6504.878] (II) Loader magic: 0x7d3440
[ 6504.878] (II) Module ABI versions:
[ 6504.878] X.Org ANSI C Emulation: 0.4
[ 6504.878] X.Org Video Driver: 10.0
[ 6504.878] X.Org XInput driver : 12.2
[ 6504.878] X.Org Server Extension : 5.0
[ 6504.878] (--) PCI:*(0:1:0:0) 10de:1200:1462:2382 rev 161, Mem @ 0xfc000000/33554432, 0xd8000000/134217728, 0xd4000000/67108864, I/O @ 0x0000dc00/128, BIOS @ 0x????????/524288
[ 6504.878] (WW) Open ACPI failed (/var/run/acpid.socket) (No such file or directory)
[ 6504.878] (II) LoadModule: "extmod"
[ 6504.879] (II) Loading /usr/lib/xorg/modules/extensions/libextmod.so
[ 6504.879] (II) Module extmod: vendor="X.Org Foundation"
[ 6504.879] compiled for 1.10.3, module version = 1.0.0
[ 6504.879] Module class: X.Org Server Extension
[ 6504.879] ABI class: X.Org Server Extension, version 5.0
[ 6504.879] (II) Loading extension MIT-SCREEN-SAVER
[ 6504.879] (II) Loading extension XFree86-VidModeExtension
[ 6504.879] (II) Loading extension XFree86-DGA
[ 6504.879] (II) Loading extension DPMS
[ 6504.879] (II) Loading extension XVideo
[ 6504.879] (II) Loading extension XVideo-MotionCompensation
[ 6504.879] (II) Loading extension X-Resource
[ 6504.879] (II) LoadModule: "dbe"
[ 6504.879] (II) Loading /usr/lib/xorg/modules/extensions/libdbe.so
[ 6504.879] (II) Module dbe: vendor="X.Org Foundation"
[ 6504.879] compiled for 1.10.3, module version = 1.0.0
[ 6504.879] Module class: X.Org Server Extension
[ 6504.879] ABI class: X.Org Server Extension, version 5.0
[ 6504.879] (II) Loading extension DOUBLE-BUFFER
[ 6504.879] (II) LoadModule: "glx"
[ 6504.879] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 6504.887] (II) Module glx: vendor="NVIDIA Corporation"
[ 6504.887] compiled for 4.0.2, module version = 1.0.0
[ 6504.887] Module class: X.Org Server Extension
[ 6504.887] (II) NVIDIA GLX Module 275.19 Tue Jul 12 18:31:51 PDT 2011
[ 6504.887] (II) Loading extension GLX
[ 6504.887] (II) LoadModule: "record"
[ 6504.887] (II) Loading /usr/lib/xorg/modules/extensions/librecord.so
[ 6504.887] (II) Module record: vendor="X.Org Foundation"
[ 6504.887] compiled for 1.10.3, module version = 1.13.0
[ 6504.887] Module class: X.Org Server Extension
[ 6504.887] ABI class: X.Org Server Extension, version 5.0
[ 6504.887] (II) Loading extension RECORD
[ 6504.887] (II) LoadModule: "dri"
[ 6504.887] (II) Loading /usr/lib/xorg/modules/extensions/libdri.so
[ 6504.887] (II) Module dri: vendor="X.Org Foundation"
[ 6504.887] compiled for 1.10.3, module version = 1.0.0
[ 6504.887] ABI class: X.Org Server Extension, version 5.0
[ 6504.887] (II) Loading extension XFree86-DRI
[ 6504.887] (II) LoadModule: "dri2"
[ 6504.887] (II) Loading /usr/lib/xorg/modules/extensions/libdri2.so
[ 6504.887] (II) Module dri2: vendor="X.Org Foundation"
[ 6504.887] compiled for 1.10.3, module version = 1.2.0
[ 6504.887] ABI class: X.Org Server Extension, version 5.0
[ 6504.887] (II) Loading extension DRI2
[ 6504.887] (II) LoadModule: "nvidia"
[ 6504.888] (II) Loading /usr/lib/xorg/modules/drivers/nvidia_drv.so
[ 6504.888] (II) Module nvidia: vendor="NVIDIA Corporation"
[ 6504.888] compiled for 4.0.2, module version = 1.0.0
[ 6504.888] Module class: X.Org Video Driver
[ 6504.888] (II) NVIDIA dlloader X Driver 275.19 Tue Jul 12 18:15:26 PDT 2011
[ 6504.888] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 6504.888] (--) using VT number 7
[ 6504.894] (II) Loading sub module "fb"
[ 6504.894] (II) LoadModule: "fb"
[ 6504.894] (II) Loading /usr/lib/xorg/modules/libfb.so
[ 6504.894] (II) Module fb: vendor="X.Org Foundation"
[ 6504.894] compiled for 1.10.3, module version = 1.0.0
[ 6504.894] ABI class: X.Org ANSI C Emulation, version 0.4
[ 6504.894] (II) Loading sub module "wfb"
[ 6504.894] (II) LoadModule: "wfb"
[ 6504.894] (II) Loading /usr/lib/xorg/modules/libwfb.so
[ 6504.894] (II) Module wfb: vendor="X.Org Foundation"
[ 6504.894] compiled for 1.10.3, module version = 1.0.0
[ 6504.894] ABI class: X.Org ANSI C Emulation, version 0.4
[ 6504.894] (II) Loading sub module "ramdac"
[ 6504.894] (II) LoadModule: "ramdac"
[ 6504.894] (II) Module "ramdac" already built-in
[ 6504.894] (II) Loading /usr/lib/xorg/modules/drivers/nvidia_drv.so
[ 6504.894] (II) Loading /usr/lib/xorg/modules/libwfb.so
[ 6504.894] (II) Loading /usr/lib/xorg/modules/libfb.so
[ 6504.894] (**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
[ 6504.894] (==) NVIDIA(0): RGB weight 888
[ 6504.894] (==) NVIDIA(0): Default visual is TrueColor
[ 6504.894] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
[ 6505.241] (II) NVIDIA(GPU-0): Display (LG Electronics L196WTQ (CRT-0)) does not support
[ 6505.241] (II) NVIDIA(GPU-0): NVIDIA 3D Vision stereo.
[ 6505.242] (II) NVIDIA(0): NVIDIA GPU GeForce GTX 560 Ti (GF114) at PCI:1:0:0 (GPU-0)
[ 6505.242] (--) NVIDIA(0): Memory: 1048576 kBytes
[ 6505.242] (--) NVIDIA(0): VideoBIOS: 70.24.11.00.00
[ 6505.242] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[ 6505.242] (--) NVIDIA(0): Interlaced video modes are supported on this GPU
[ 6505.242] (--) NVIDIA(0): Connected display device(s) on GeForce GTX 560 Ti at
[ 6505.242] (--) NVIDIA(0): PCI:1:0:0
[ 6505.242] (--) NVIDIA(0): LG Electronics L196WTQ (CRT-0)
[ 6505.242] (--) NVIDIA(0): LG Electronics L196WTQ (CRT-0): 400.0 MHz maximum pixel clock
[ 6505.281] (II) NVIDIA(0): Assigned Display Device: CRT-0
[ 6505.281] (==) NVIDIA(0):
[ 6505.281] (==) NVIDIA(0): No modes were requested; the default mode "nvidia-auto-select"
[ 6505.281] (==) NVIDIA(0): will be used as the requested mode.
[ 6505.281] (==) NVIDIA(0):
[ 6505.281] (II) NVIDIA(0): Validated modes:
[ 6505.281] (II) NVIDIA(0): "nvidia-auto-select"
[ 6505.281] (II) NVIDIA(0): Virtual screen size determined to be 1440 x 900
[ 6505.307] (--) NVIDIA(0): DPI set to (89, 87); computed from "UseEdidDpi" X config
[ 6505.307] (--) NVIDIA(0): option
[ 6505.307] (--) Depth 24 pixmap format is 32 bpp
[ 6505.307] (II) NVIDIA: Using 3072.00 MB of virtual memory for indirect memory
[ 6505.307] (II) NVIDIA: access.
[ 6505.311] (II) NVIDIA(0): ACPI: failed to connect to the ACPI event daemon; the daemon
[ 6505.311] (II) NVIDIA(0): may not be running or the "AcpidSocketPath" X
[ 6505.311] (II) NVIDIA(0): configuration option may not be set correctly. When the
[ 6505.311] (II) NVIDIA(0): ACPI event daemon is available, the NVIDIA X driver will
[ 6505.311] (II) NVIDIA(0): try to use it to receive ACPI event notifications. For
[ 6505.311] (II) NVIDIA(0): details, please see the "ConnectToAcpid" and
[ 6505.311] (II) NVIDIA(0): "AcpidSocketPath" X configuration options in Appendix B: X
[ 6505.311] (II) NVIDIA(0): Config Options in the README.
[ 6505.313] (II) NVIDIA(0): Setting mode "nvidia-auto-select"
[ 6505.360] (II) Loading extension NV-GLX
[ 6505.411] (==) NVIDIA(0): Disabling shared memory pixmaps
[ 6505.411] (==) NVIDIA(0): Backing store disabled
[ 6505.411] (==) NVIDIA(0): Silken mouse enabled
[ 6505.412] (**) NVIDIA(0): DPMS enabled
[ 6505.412] (II) Loading extension NV-CONTROL
[ 6505.412] (II) Loading extension XINERAMA
[ 6505.412] (II) Loading sub module "dri2"
[ 6505.412] (II) LoadModule: "dri2"
[ 6505.412] (II) Loading /usr/lib/xorg/modules/extensions/libdri2.so
[ 6505.413] (II) Module dri2: vendor="X.Org Foundation"
[ 6505.413] compiled for 1.10.3, module version = 1.2.0
[ 6505.413] ABI class: X.Org Server Extension, version 5.0
[ 6505.413] (II) NVIDIA(0): [DRI2] Setup complete
[ 6505.413] (==) RandR enabled
[ 6505.413] (II) Initializing built-in extension Generic Event Extension
[ 6505.413] (II) Initializing built-in extension SHAPE
[ 6505.413] (II) Initializing built-in extension MIT-SHM
[ 6505.413] (II) Initializing built-in extension XInputExtension
[ 6505.413] (II) Initializing built-in extension XTEST
[ 6505.413] (II) Initializing built-in extension BIG-REQUESTS
[ 6505.413] (II) Initializing built-in extension SYNC
[ 6505.413] (II) Initializing built-in extension XKEYBOARD
[ 6505.413] (II) Initializing built-in extension XC-MISC
[ 6505.413] (II) Initializing built-in extension SECURITY
[ 6505.413] (II) Initializing built-in extension XINERAMA
[ 6505.413] (II) Initializing built-in extension XFIXES
[ 6505.413] (II) Initializing built-in extension RENDER
[ 6505.413] (II) Initializing built-in extension RANDR
[ 6505.413] (II) Initializing built-in extension COMPOSITE
[ 6505.413] (II) Initializing built-in extension DAMAGE
[ 6505.414] (II) Initializing extension GLX
[ 6505.507] (II) config/udev: Adding input device Power Button (/dev/input/event1)
[ 6505.507] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[ 6505.507] (II) LoadModule: "evdev"
[ 6505.507] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[ 6505.507] (II) Module evdev: vendor="X.Org Foundation"
[ 6505.507] compiled for 1.10.0, module version = 2.6.0
[ 6505.507] Module class: X.Org XInput Driver
[ 6505.507] ABI class: X.Org XInput driver, version 12.2
[ 6505.507] (II) Using input driver 'evdev' for 'Power Button'
[ 6505.507] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[ 6505.507] (**) Power Button: always reports core events
[ 6505.507] (**) Power Button: Device: "/dev/input/event1"
[ 6505.522] (--) Power Button: Found keys
[ 6505.522] (II) Power Button: Configuring as keyboard
[ 6505.522] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input1/event1"
[ 6505.522] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD)
[ 6505.522] (**) Option "xkb_rules" "evdev"
[ 6505.522] (**) Option "xkb_model" "evdev"
[ 6505.522] (**) Option "xkb_layout" "br"
[ 6505.522] (**) Option "xkb_variant" "abnt2"
[ 6505.543] (II) config/udev: Adding input device Power Button (/dev/input/event0)
[ 6505.543] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[ 6505.543] (II) Using input driver 'evdev' for 'Power Button'
[ 6505.543] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[ 6505.543] (**) Power Button: always reports core events
[ 6505.543] (**) Power Button: Device: "/dev/input/event0"
[ 6505.579] (--) Power Button: Found keys
[ 6505.579] (II) Power Button: Configuring as keyboard
[ 6505.579] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input0/event0"
[ 6505.579] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD)
[ 6505.579] (**) Option "xkb_rules" "evdev"
[ 6505.579] (**) Option "xkb_model" "evdev"
[ 6505.579] (**) Option "xkb_layout" "br"
[ 6505.579] (**) Option "xkb_variant" "abnt2"
[ 6505.582] (II) config/udev: Adding input device Genius Optical Mouse (/dev/input/event3)
[ 6505.582] (**) Genius Optical Mouse: Applying InputClass "evdev pointer catchall"
[ 6505.582] (II) Using input driver 'evdev' for 'Genius Optical Mouse'
[ 6505.582] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[ 6505.582] (**) Genius Optical Mouse: always reports core events
[ 6505.582] (**) Genius Optical Mouse: Device: "/dev/input/event3"
[ 6505.606] (--) Genius Optical Mouse: Found 3 mouse buttons
[ 6505.606] (--) Genius Optical Mouse: Found scroll wheel(s)
[ 6505.606] (--) Genius Optical Mouse: Found relative axes
[ 6505.606] (--) Genius Optical Mouse: Found x and y relative axes
[ 6505.606] (II) Genius Optical Mouse: Configuring as mouse
[ 6505.606] (II) Genius Optical Mouse: Adding scrollwheel support
[ 6505.606] (**) Genius Optical Mouse: YAxisMapping: buttons 4 and 5
[ 6505.606] (**) Genius Optical Mouse: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[ 6505.606] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:12.0/usb3/3-3/3-3:1.0/input/input8/event3"
[ 6505.606] (II) XINPUT: Adding extended input device "Genius Optical Mouse" (type: MOUSE)
[ 6505.606] (II) Genius Optical Mouse: initialized for relative axes.
[ 6505.606] (**) Genius Optical Mouse: (accel) keeping acceleration scheme 1
[ 6505.606] (**) Genius Optical Mouse: (accel) acceleration profile 0
[ 6505.606] (**) Genius Optical Mouse: (accel) acceleration factor: 2.000
[ 6505.606] (**) Genius Optical Mouse: (accel) acceleration threshold: 4
[ 6505.606] (II) config/udev: Adding input device Genius Optical Mouse (/dev/input/mouse0)
[ 6505.606] (II) No input driver/identifier specified (ignoring)
[ 6505.606] (II) config/udev: Adding input device USB-compliant keyboard (/dev/input/event4)
[ 6505.606] (**) USB-compliant keyboard: Applying InputClass "evdev keyboard catchall"
[ 6505.606] (II) Using input driver 'evdev' for 'USB-compliant keyboard'
[ 6505.606] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[ 6505.606] (**) USB-compliant keyboard: always reports core events
[ 6505.606] (**) USB-compliant keyboard: Device: "/dev/input/event4"
[ 6505.646] (--) USB-compliant keyboard: Found keys
[ 6505.646] (II) USB-compliant keyboard: Configuring as keyboard
[ 6505.646] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:12.1/usb4/4-2/4-2:1.0/input/input4/event4"
[ 6505.646] (II) XINPUT: Adding extended input device "USB-compliant keyboard" (type: KEYBOARD)
[ 6505.646] (**) Option "xkb_rules" "evdev"
[ 6505.646] (**) Option "xkb_model" "evdev"
[ 6505.646] (**) Option "xkb_layout" "br"
[ 6505.646] (**) Option "xkb_variant" "abnt2"
[ 6505.646] (II) config/udev: Adding input device USB-compliant keyboard (/dev/input/event5)
[ 6505.646] (**) USB-compliant keyboard: Applying InputClass "evdev keyboard catchall"
[ 6505.646] (II) Using input driver 'evdev' for 'USB-compliant keyboard'
[ 6505.646] (II) Loading /usr/lib/xorg/modules/input/evdev_drv.so
[ 6505.646] (**) USB-compliant keyboard: always reports core events
[ 6505.646] (**) USB-compliant keyboard: Device: "/dev/input/event5"
[ 6505.662] (--) USB-compliant keyboard: Found 1 mouse buttons
[ 6505.662] (--) USB-compliant keyboard: Found scroll wheel(s)
[ 6505.662] (--) USB-compliant keyboard: Found relative axes
[ 6505.662] (--) USB-compliant keyboard: Found x and y relative axes
[ 6505.662] (--) USB-compliant keyboard: Found absolute axes
[ 6505.662] (--) USB-compliant keyboard: Found keys
[ 6505.662] (II) USB-compliant keyboard: Configuring as mouse
[ 6505.662] (II) USB-compliant keyboard: Configuring as keyboard
[ 6505.662] (II) USB-compliant keyboard: Adding scrollwheel support
[ 6505.662] (**) USB-compliant keyboard: YAxisMapping: buttons 4 and 5
[ 6505.662] (**) USB-compliant keyboard: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[ 6505.662] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:12.1/usb4/4-2/4-2:1.1/input/input5/event5"
[ 6505.662] (II) XINPUT: Adding extended input device "USB-compliant keyboard" (type: KEYBOARD)
[ 6505.662] (**) Option "xkb_rules" "evdev"
[ 6505.662] (**) Option "xkb_model" "evdev"
[ 6505.662] (**) Option "xkb_layout" "br"
[ 6505.662] (**) Option "xkb_variant" "abnt2"
[ 6505.662] (II) USB-compliant keyboard: initialized for relative axes.
[ 6505.662] (WW) USB-compliant keyboard: ignoring absolute axes.
[ 6505.663] (**) USB-compliant keyboard: (accel) keeping acceleration scheme 1
[ 6505.663] (**) USB-compliant keyboard: (accel) acceleration profile 0
[ 6505.663] (**) USB-compliant keyboard: (accel) acceleration factor: 2.000
[ 6505.663] (**) USB-compliant keyboard: (accel) acceleration threshold: 4
[ 6505.663] (II) config/udev: Adding input device USB-compliant keyboard (/dev/input/mouse1)
[ 6505.663] (II) No input driver/identifier specified (ignoring)
[ 6505.665] (II) config/udev: Adding input device PC Speaker (/dev/input/event2)
[ 6505.665] (II) No input driver/identifier specified (ignoring)
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[ 6525.656] (II) UnloadModule: "evdev"
[ 6525.656] (II) Unloading evdev
[ 6525.656] (II) USB-compliant keyboard: Close
[ 6525.656] (II) UnloadModule: "evdev"
[ 6525.656] (II) Unloading evdev
[ 6525.656] (II) Genius Optical Mouse: Close
[ 6525.656] (II) UnloadModule: "evdev"
[ 6525.656] (II) Unloading evdev
[ 6525.656] (II) Power Button: Close
[ 6525.656] (II) UnloadModule: "evdev"
[ 6525.656] (II) Unloading evdev
[ 6525.656] (II) Power Button: Close
[ 6525.656] (II) UnloadModule: "evdev"
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How to use "start" and "duration" with HLS stream

Hi all,
is it possible to use "start" and "stop" with HLS stream like rtmp stream?
If yes, how?
thanks in advance.

Hi,
This is completely player side fucntionality you are asking for. However, I guess default player that comes on safari (iPad), quicktime has the player timeline with stop and start option. But if not, you can create your custom player using exposed api of AVPlayer. Check-out AVPlayer api's.
FMS, by nature of protocol will respect the request to get the data(in case of client-play-start) and will not automatically push the data to the client if not asked for by the client (as in case of client-play-stop).
Thanks

Starting and stopping timer using external inputs interfaced with labview

hello,
I have trouble finding how to start and stop the timer using external voltage or current pulse. we are interfacing a circuit to labview. so for that we need to count the time it takes between the two external voltages. We have to keep on comparing the voltages to some reference voltage. And when the external voltage crosses the reference voltage we have to start the timer and again we have to stop the timer using tha same logic. We need it for time calculation between the triggers.
hope you can help.

https://decibel.ni.com/content/docs/DOC-23334 is agood example to start. You need to modify it to include stop trigger.

Tree node images changes.. with start and stop button

I create the animator extends JPanel, which start and stop can be controlled with Swing Timer. It works fine with animation control over the panel.
Now, I have a tree with each image at each node.
when the start button clicks, one node image should be animated.
It is implementable. If animation.gif would have worked, I did't have to do this, but animation gif has fatal error with time interval.
any words would be appreciated. Thanks =

Damn !
With version 1.2.1 I think you'll have to create a new class that extends PositionPathInterpolator and add a pause() anr resume() method to it.
i suggest something like:
public class MyPositionPathInterpolator() extends PositionPathInterpolator {
// add some constructors if necessary
private float pauseAlphaValue = 0;
// override computeTransform method
public void computeTransform(float alphaValue, Transform3D transform) {
   float newAlphaValue = alphaValue + pauseAlphaValue; // calculate new alpha value
   if(newAlphaValue > 1) // modify it if it is out of bounds
      newAlphaValue -= 1;
   else if (newAlphaValue < 0)
      newAlphaValue += 1;
   super.computeTransform(newAlphaValue, transform); // computeTransform with the right alpha value
public void pause() {
   this.setEnable(false); // it won't compute transform anymore
   pauseAlphaValue = this.getAlpha().value(); // retrieve current alphavalue
public void resume() {
   pauseAlphaValue -= this.getAlpha().value();
   this.setEnable(true) // restart computing transform
}Now you invoke pause and resume methods on your myPositionPathInterpolator object when user clicks on the buttons.
Of course it is a trick and it will work only with increasing alpha.
c ya
GnG

PCI6601 - Start and Stop of all 4 counters individually in LabView 5.0

Hi!
I work with the PCI6601 card and I want to start and stop each of the 4 counters independent from the others.
To start only one counter is quite easy, but two or more won't work.
I have 4 external devices and want to know the counts of each device that means there are four sources.
The Vi's in LabView 5.0 supports only the AM9513/8254/and the DAQ-STC. Perhaps there is no possibility to work with all features of the 6601 in LV5.0.
I tried it with the counter list and with group# and the listed counters started with the internal frequency. But this is not what I want.
Please give me some hints to "rescue the next nights".
Thanks for your answers!
Markus

A couple comments that will hopefully let you sleep well tonight...
1. If possible, use the counter functions whose icon show a "CTR" in the lower right rather than a "123". Do you have these in LV 5.0? I know they were available by 5.1.1, but am not certain about 5.0
2. The 6601 doesn't support multiple counters in a group. To program 4 counters requires 4 config chains with 4 separate calls to "Counter Group Config". Note that each call must input a unique group #.
You'll end up with 4 unique task id's which you can then start & stop independently of the others.
-Kevin P.

Allow a user access to start and stop a particular service in Solaris 11 using RBAC controls

So, using svcbundle I created a service called "oracle" that starts and shutdown a db. I'm aware of how to grant RBAC access to be a "service operator" to be able to control start/stop ALL services. But I'd like to grant a user access to start and stop JUST this service.
in this document on page 15, it states that it's possible to do this kind of granularity but doesn't explain how to do it step by step.
how does one achieve this?
thanks.

You need to add a property group such as
<property_group name='general' type='framework'>

<propval name='action_authorization' type='astring'
value='solaris.smf.manage.oracle' />
</property_group>
Then add the solaris.smf.manage.oracle authorization to the user profile.
As an example, see Less known Solaris features: RBAC and Privileges - Part 2: Role based access control - c0t0d0s0.org

I want cRIO to start and stop acquisition with push of physical button on cRIO, is that possible?

When using my cRIO 9024 on the field, I prefer to be able to start and stop acquisition with push of a physical button on cRIO.
I mean I don't want it to be "as start-up," I don't want cRIO to start acquisition as soon as the power is supplied.
Is that possible?
Solved!
Go to Solution.

Hi Cashany,
you surely can read that switch status. But there are easier (but more expensive) ways to switch a button. Fiddling with a pen or small screwdriver to switch USER1 isn't what I call "user friendly"...
- You have atleast 2 voltage inputs on your module available. Use a switch to supply voltage to those inputs. Use a "real" button!
- You have a serial port available. You could set some pins to GND or voltage and check their status inside cRIO/RT target...
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Windows script to start and stop jobserver only, with BOXI31

hi,
my question is easy but i have found nothing : on BOXI31
how to start and stop jobserver (adaptive...) automaticaly with windows script ?
in tasklist command, jobserver have no services name...
thank's

In XI R2 you can stop & start job servers by their types, but in XI 3.1 I don't think you can do that, b'cos it doesnt list by server type just shows jobserver for crystal, webi & deski.
Thanks,
Hari

I use Adobe Premiere Elements 11. I want to make a Credit Roll and start off screen and stop with the credit remaining still in the middle of the screen. I know this can be done with CS6. Can this be done in Elements 11? Does Elements 12 or 13 have these

I use Adobe Premiere Elements 11. I want to make a Credit Roll and start off screen and stop with the credit remaining still in the middle of the screen. I know this can be done with CS6. Can this be done in Elements 11? Does Elements 12 or 13 have these options for Credit Roll.

stevel
Please read my work on this topic which involves Premiere Elements Preroll and Postroll settings.
ATR Premiere Elements Troubleshooting: PE: Preroll and Postroll Options Interpreted
Especially the section relating to Titler, Roll and Crawl Titles.
Please let us know if that worked for you.
Thank you.
ATR

With apple pages - how do I start and stop the correction system/ spell and grammar, etc proof reader?

How do I start and stop the corection system - das Korrektursystem/ the program in pages where one mark a text while proff reading it?

Pages version?

Start and Stop Trigger using PXI-6120 and DigitalStartAndStopTrigger.vi not working :-(

Hello,
I've been trying for a while now to get my PXI unit to capture a waveform between a Start and Stop (Reference) Trigger using the NI example DigitalStartAndStopTrigger.vi downloaded from the NI website. However, whilst the start trigger and stop trigger seem to be working i.e. the VI runs and stops at the correct times there is never any data read from my DAQmx compatible PXI-6120 card. So I can see the VI is running around the aquisition loop but the Property Node AvailSampPerChan is always returning zero... this has me slightly puzzled. I thought this might just be a driver issue so I've updated my box to the following software versions (see below) and installed the latest drivers e.g. DCDNov07.exe (also from the NI site) but nothing has changed.
my software as of now.
Labview 7.1 (with the 7.1.1 upgrade applied)
Max 4.3.0.49152
DAQmx 8.6.0f12
Trad DAQ 7.4.4f7
before I updated I had the same problem but with the following versions:
Labview 7.1 (with the 7.1.1 upgrade applied)
Max 4.2.1.3001
DAQmx 8.5.0f5
Trad DAQ 6.9.3f4
So to cut a long story short I still have the same problem with the triggers... does anybody have any ideas what is going wrong?
To add insult to injury it the traditional DAQ example ai_start-stop_d-trig.vi was almost working correctly before I did the upgrade. It had the strange behaviour of capturing the AI0 channel but on the wrong edges (e.g. if I set Start on Rise and Stop on Fall it would do the opposite, Start on Fall and Stop on Rise).
I'm going to leave my box doing a mass compile over night but i'd really like it if someone could suggest a solution or point me in the right direction.
Many thanks,
Mike

Hi Graham
I'm out of the lab today but I'll try and answer your questions as best I can...
1) What are the values you have set for Buffer size, Rate, samples per read and post trigger Samples?
At the moment I have all the values (e.g. sample rate, buffer size etc) unchanged apart from the ones I mentioned in my previous post (see above). I have in the past played around with changing the buffer sizes and rates in the example VI but as this appeared to have no effect on the behaviour I now have them setup as in the download.
2) Does the program end after the stop trigger is implemented?
Yep, if I toggle the trigger line high then low I see the program exits the read loop and the VI stops running as expected.
3) Lastly can you give me the details of triggering method. Are you
using a digital train of users set digital pulses? how long is the
program running.I'm using the WriteDigChan.vi to manually toggle the first digital line of the PXI-6733 card which is wired directly to PFI0 of the PXI-6120 card. Generally, I just start the VI running and then toggle the line high, wait a couple of seconds and then toggle it low.
To me it all looks like it should be acquiring samples but as I said yesterday it just refuses to fill the buffer with any data (and hence no samples are read).
Any ideas? and thanks for you help,
Mike

How to copy only part of a binary file after selecting a start and stop byte?

I need to copy a selectable block of binary data from one file to a new file. The binary file is made up of several data widths (8/16/32 signed and unsigned). If I use a read binary function I will need to account for the data types within the file. I was hoping to do a copy function with a start and stop byte control. Any pointers?

The attached Rube Goldberg Code copies two arrays of clusters to two arrays of indicators.
Ben
BTW: It does so by writtng the flattened data to a fixed length file and decoding same on the read.
Message Edited by Ben on 03-24-2007 12:54 PM
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction
Attachments:
File Decode.JPG ‏137 KB
FileDecode.vi ‏125 KB

Control DC Motor (start and stop) with LabView

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