Ground connector OEM USB-8452

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• NEITHER USB-8452 - reach the maximum write SPI speed

  Hello

  I have a USB-8452 with the latest version of the software installed (2.1.2). The host computer is a Core i7. I am trying to achieve the maximum SPI write speed with the camera possible. I tried the basic block read/write SPI, SPI Scripting blocks and SPINNAKER streaming, but the first two have large delays between CS falling and the data being written (with so that delays in loop), and the last seems to be useful only for read operations.

  Can someone tell me if there is a way of a) reduce the time of installation for basic SPI / SPI Scripting or b) writing different values in a single stream of SPI? Thanks in advance for any help on this issue, even if it's just confirmation that yes they is hard limits that cannot be overcome with the LabVIEW 8452 interface at this time.

  Here's the best I can do right now, as shown in my logic analyzer. Change of the SPI clock speed does not affect installation time and delays that are primary and secondary bottlenecks:

  SPI read/write database-

  Program: Basic Configuration followed by read/write of SPI block itself in a while loop

  Main bottleneck: ~ 450 delay us into iterations of the loop (see Figure 2)

  Secondary bottleneck: ~ 6 us delay between falling edge of CS and the first synchronization signal (see Figure 1)

  Capture 1 - delay highlighting between CS falling and first SCLK pulse

  

  2 delay highlighting between all iterations of the loop of capture

  

   

   

  Scripts of SPI-

  
  Program: Followed two Script blocks Basic Configuration run in a while loop (to check the two block to block and delay loop iteration)

  
  

  Main bottleneck: ~ 450 delay us into iterations of the loop (see Figure 3, space between the second and third images captured)

  Secondary bottleneck: ~ 250 us delay between blocks of Script run consecutive (see Figure 3, space between the first and second captured images)
  

  Capture 3 - highlighting delays consecutive run the Script and delays between while the loop iteration
  

  
  

  SPI in Streaming- It's the closest to achieve a fast writing speed, but unfortunately, it seems to be only useful for read operations (e.g., ADC), do not write.

  Program: Configuration of the base stream followed by start of the flow block

  Main bottleneck: impossible to write something else than the data value unique property "wave 1-> MOSI data." I can write a byte array to this property, but it will simply put all these bytes in an image and repeat this framework (see Figure 4) rather than go through each value.
  

   

  4 - two bytes sent repeatedly using SPI capture stream. Delay of CS is finally good, but no possibility to change the MOSI image to image data.
  

  

  Hi JBender1,

  This show looks like what we would expect for a 8452.

  If you need higher performance, I encourage you to watch using a card R or FlexRIO FPGA series for your implementation.

• Load connector micro usb Lenovo K900

  Hello

  I'm going crazy with the charger sent by lenovo with my K900.

  I found a diet with a Micro USB type B cable in the box, but the entrance of the phone type is A. There are problems of loading of the phone.
  Why lenovo sends type micro usb B cables if the phone requires cables tipe has?

  Should what kind of cable I buy exactly the battery properly?
  Micro USB type A?
  Micro type USB OTG?
  Or what?
  Lenovo can provide the right cable? Or where I can find it?
  Why Levovo designs some good phones but then you lose in this nonsense?
  Do you want that I come and work for you?

  Well. I got a cable micro usb A type, the situation improved but still not satisfactory.
  I'll take a replacement USB charging port Dock Connector and I will replace the connector Micro USB type a weld on a Micro USB type b.
  If you want something, do it yourself!

• Can you produce arbitrary data TX with the USB-8452 SPI streaming mode?

  I use a USB of NOR-8452 controller in SPI mode, controlled by a C program compiled in 2013 of LabWindows/CVI. In order to talk to the chip, we designed, I need to control the delay between the final of SPC deassertion and the CS deassertion (T11 synchronization setting) to keep it very small. Therefore, I use streaming mode.

  I read the NOR-845 x Hardware and software manual and looked at the two projects that use the SPI in streaming mode in NOR-845 x examples dir. The examples use two REITS it to talk about the A/D converters. In other words, variable data in time comes from the SPI (ADC) slave to SPI master (Controller NI 8452) via the SPI_MISO line.

  Is it possible to use the USB-8452 to generate variable data in time that goes the other way, from the master to the slave SPI via SPI_MOSI SPI line? Can I make a burst of arbitrary length entry using the streaming mode?

  For example, let's say I have 8 bytes of data to be transmitted:

  WriteData [] is {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};.

  If I try to send this as 4 samples of 16-bit:

    

  ni845xSpiStreamConfigurationSetNumBits (StreamHandle, 16);
  
  ni845xSpiStreamConfigurationSetNumSamples (StreamHandle, 4);
  
  ni845xSpiStreamConfigurationWave1SetMosiData (StreamHandle, WriteData, 8);
  
  ni845xSpiStreamStart (DeviceHandle, StreamHandle);

  I expect to see transmitted:
  

  0 x 0102
  
  0 x 0304
  
  0 x 0506
  
  0 x 0708

  Instead, what I see in fact is the first NumSamples times repeated word:

  0 x 0102
  
  0 x 0102
  
  0 x 0102
  
  0 x 0102
  
  

  Is it possible to generate the first (non-recurring) model? Or streaming mode really is only able to capture input data?

  Thank you for any help you can provide.

  -jskroch

  Hello jskroch,

  I looked through the documentation for the NOR-845 x and it confirms that the workflow capability displays the same MOSI data for each operation of SPI during streaming.

  You can use the ni845xSpiWriteRead function to write a byte array in the order using 1 function call.  These bytes can be configured to your waveform specified.

  Kind regards

• NEITHER USB-8452 Master Mode

  Hello

  I'm new to USB-8452 for SPI. I want 8452 to "master" mode. There are basic SPI API and SPI API. So, what is the mode by default if I use the basic API.

  Best regards

  Bonnie

  The NI USB - 845 x only supports the SPI master mode. The API Base, advanced and streaming are all masters.

  For I2C, we have a slave API (but the basic API and advanced are also master mode)

• Board OR USB - 6002 OEM, USB external connection

  Hello!

  I'm doing a PCB which will include some pressure sensors, thermocouple, bnc connector and a Connector Type B USB.
  I was wondering if there is an app note or guidelines for the use of an external USB connector, I need to keep in mind any filtering or suppression of emi? or is it included in the OEM Board?

  Thank you!.

  Carlos B.

  Keep short cords, together and away from the tracks of power.  No, no, not really.

  I'll put in a few TVS diodes for protecting against ESD, but these are not needed.

  Shoudln was exceptionally loud need of filtering or protection unless you're in a (electrically) environment.

• Ground and the USB-8451-> it should reference?

  I use a usb-8451 attached to a PCB card which has its own means with separate analog and digital designs. When I join the 8451 grounded strange results of power supply occur. Is it allowed to leave separate and unconnected?

  Devices USB usually get their power supply (+ 5V and GND) of the device, they are connected. There is no need of additional connections to GND. These additional connections can lead to "mass loops" that can pick up noise and cause errors. -The 'front end' of a device properly designed USB is isolated from the power supply. If you connect anything to the input of the USB device, use the GND or NOT the entrance terminal, of reference and NEVER the Terminal GND of the Board that powers the USB device.

• Trying to share a wifi Connector 1 USB machine via the LAN to another machine

  I have 2 machines, one with vista 32 bit and the other xp pro 64-bit. Mcahine vista has connectivity to the network using a wifi USB dongle. I set up a LAN hub and the machines are file sharing very well, I'm trying to access the net the XP pro machine through its connection to the local network without success and have tried everything. 2nd attempt I configured manually the IP addresses, and it still does not work! Any suggestions...?

  Do not manually configure IP addresses.

  On the Vista machine, turn on Internet connection sharing on the connection that uses the Wi - Fi dongle.  If asked what to use for the home networking connection, select the connection to the local network.  This will automatically give connection to the local network of the IP address 192.168.0.1.

  Configure the connection to the local network of the XP Pro machine to automatically obtain an IP address.  In the 192.168.0.x range, it will get an IP address from the Vista machine.

  Boulder computer Maven
  Most Microsoft Valuable Professional

• OEM usb mouse and usb keyboard Freeze, disconnect automatically w/eject Sound

  I have a 2.5 year old Dell XPS 8300 Windows 7 PC. Mouse usb from the factory and start of keyboard to eject and re - insert (Windows systems "thumb-thump" sounds) and its own without any intervention on my part. Initially it just, just momentarily freezes for a second, but it could be anywhere from 20 minutes to several hours and the same thing happens to 3 or 4 times, and finally and at the same time, the mouse and keyboard freeze. The "cursor" or "pointer" on the screen is totally inadmissible, and seizure keyboard is inadmissible. CTRL + Alt + Delete does not work yet.

  A few points:

  1 there is no drivers for the wired mouse usb and a keyboard wired usb on page download Dell and Driver for XPS 8700.

  2 when I arrived to the Device Manager, it says device keyboard HID and HID - compatible mouse.

  3. There is no drivers to roll back to, and if I update driver for each device, windows tells me I use the latest version of the driver.

  4. I tried a clean install of Windows 7 and it does not solve the problem. (Exaggeration, I know. "I have a lot of time).

  5. I'm tired a clean install of Windows 8.1 and it does not solve the problem. (Again, I know, exaggerated, but I was curious).

  6. in other words, I have exactly the same problem on Windows 7 and Windows 8.1.

  7. I tried to use all the different USB ports on my PC and the same problem persists. I don't think that it's a problem of USB hardware in any case, given that the freezing of the mouse and the keyboard are occurring simultaneously, and each device has its on usb port.

  8. this problem is new in the last month. Never had anything like this in the last 2.5 years.

  Thanks for any help.

  Hi JJ,

  Thank you for your update. Much appreciated!

  Basically, for Windows 8.1, you will need to update the drivers more recent. So, you need to update the drivers for the chipset from the Dell Web site, and if it does not, you may need to contact the manufacturer for updated versions. Also. Please check in the Device Manager and uninstall the drivers of HID devices (under keyboard) and changes in the Update window to do not to install the updated driver. After uninstalling, restart the computer and then install the drivers for the devices and drivers chipset on the manufacturer's Web site. Check if the problem persists.

  Please post back your results for assistance.

• ASA5580 Installation of HW - where is the GROUND connector?

  Hello people,

  In the context of a domain controller, deploy, There is need to install 2 x ASA5580. My surprise was the missing connection (or place) screw on the chassis for earthing cable. All the facilities of othes (ASR, 6500, Nexus 7 K) have a connection to the ground on its chassis.

  Installation manual warns and ask a good gorundid for her. But where should I put it?

  Note that the support where it is installed on is already grounded.

  Hope you could help me with this doubt

  Thank you!

  Lucas

  You are right, that the ASA5580 is not provided port to the ground. As long as your basket is grounded, then you're good.

  Also, it uses the input AC power and comes with an electric cord 3-wire with grounding plug that corresponds to only to a grounding type power outlet.

  Hope that helps.

• Put 8452 USB in standby mode

  How can I put the USB 8452 in sleep mode where all the pins are turned off.

  Frankmesa wrote:

  How can I put the USB 8452 in sleep mode where all the pins are turned off.

  I don't think that this device has this mode. But I don't understand even why you need this option? You have a LabVIEW application. You can use a State inside machine, Yes? Your state machine can have 'Idle', 'HW Init","Exploitation","Resources HW Close"States (etc.). When you do not want to use the material, just stay in a State of rest, no operation is performed, no resources HW is open beside the LabVIEW software.

  If you want your absent HW in all Windows, then disconnect its USB cable, or programmatically, you can emulate usb removal (devcon utility, more info here: http://digital.ni.com/public.nsf/allkb/1D120A90884C25AF862573A700602459 ).

• Apple iPhone 4S for windows 8.1 usb driver

  Apple iPhone 4S no usb driver for windows 8.1

  Hello syap_pop,

  It seems that you have the driver installed on Windows 8.1 for iOS devices. Use this section of the following article:

  If iTunes does not recognize your iPhone, iPad, or iPod

  You do not see the Apple Mobile Device USB Driver

  1. Disconnect your device from your computer.
  2. Save a screenshot by pressing the Home button and sleep/wake button of the device button at the same time. The screen should Flash briefly.
  3. Reconnect your device to your computer.
  4. If you see one of these sections in the Device Manager, expand them:
     • Imaging devices
     • Other devices
     • Portable devices
     • USB Bus controllers

  Now, locate the entry that recognizes the device as a camera. You should see 'Apple IPhone', 'Apple iPad' or 'Apple iPod '. Right-click the device entry, and then manually update the Apple Mobile Device USB driver.

  If a single unknown device appears, follow these steps:

  1. Right click on the unknown device entry.
  2. Choose Properties from the context menu, and then click the Details tab.
  3. In the drop-down menu, select hardware IDS.
  4. If the ID begins with something other than USB\VID_0000 & PID_0000, go into the Device Manager and right click on the entry for device unknown, and then manually update the Apple Mobile Device USB driver.
  5. If the ID begins with USB\VID_0000 & PID_0000, then follow the remaining steps.
  6. Unplug the unit and remove all the USB devices on the computer.
  7. Shut down the computer, and then turn it back on.
  8. Reconnect the device, tests of each USB port for about 30 seconds to see if the device is recognized.
  9. Test with a different, checked 30-pins-USB or the lightning-connector-cable-USB, if they are available.

  If you still need help, contact Apple technical support.

  Thank you for using communities of Apple Support.

• AT300 - need driver USB to develop an application for Android

  Hello

  I'm a new Tablet AT300.
  I'm developing an application for Android in Eclipse.

  I want to debug on it but I need a usb driver as explained here:
  http://developer.Android.com/tools/Extras/OEM-USB.html

  But I found Toshiba on other tablets like the Archos, I use to download on their website.
  Could you tell me where I can find the driver.

  Kind regards

  VPM

  If you are making reference to the use of 'Android Debigging Mode' that light, then using the standard driver of Google in the Android SDK should work.

  But with that you need to add the device ID in the INF for her.

• USB-7856R

  Not sure if this is good advice, but here goes.

  What is the difference between a USB-7856R and a USB-7856R OEM?

  Hi johnoc,

  I think that the best advice of posting this would have been the real time measurement and Control Commission here: http://forums.ni.com/t5/Real-Time-Measurement-and/bd-p/280 .  However, I can still do my best to answer your questions.

  There are a few differences between the USB-7856R and the OEM USB-7856R.  Mainly in the areas of certifications of products and outputs and inputs available.  I've included some links below that have relevant information.

  R series OR for USB - OEM: http://sine.ni.com/nips/cds/view/p/lang/en/nid/212044

  NI USB - 7856R Product Page: http://sine.ni.com/nips/cds/view/p/lang/en/nid/212018
  NI USB - 7856R Specifications: http://www.ni.com/pdf/manuals/374952a.pdf

  NI USB - 7856R OEM Product Page: http://sine.ni.com/nips/cds/view/p/lang/en/nid/212019

  NI USB - 7856R OEM Specifications: http://www.ni.com/pdf/manuals/374242a.pdf

  If you are looking for a device to adapt to a specific application, I recommend contacting one of our sales representatives.  Information on how to contact is available at the link below.

  http://us.NI.com/contacts

• 8452 I2C clock stretching

  Hello

  We seek to emulate an I2C sensor that is clock stretching while doing his measure. NOR-USB-8452 clock streching in slave mode support?

  Thank you

  Hi Horsfall,

  Our 845 x manual says that "the I2C specification provides a mechanism to allow the slave slow down the movement of the bus when it is not ready."  This mechanism is known as clock stretching. "In addition, he says that the behavior is different if the device is high speed mode. The USB-8452 is built according to this specification. Therefore, we can conclude that he clock stretch when necessary.

  There is an example of the NOR-8452 making the clock that extends into the following forum post: http://forums.ni.com/t5/Instrument-Control-GPIB-Serial/Use-NI-8452-be-a-Slave-device-in-SMBUS-NI-845...

  Please note that the USB-8452 supports the following (as defined in the I2C 4.0 specifications):

  1 standard mode

  2 fast mode

  3. fast mode more

  4. high speed mode

  I've referenced the manual can be found at the following URL: http://www.ni.com/pdf/manuals/371746e.pdf

  Kind regards

  Kyle S.
  Technical sales engineer
  National Instruments
  http://www.NI.com/support