How to read from a device gpib in Visual Basic

Similar Questions

• How to read from the beginning to reference trigger?

  Hello!

  I develop a system a little on a NI DAQmx 6025 and want to know how can I get data from an early relaxation of reference.

  I use "AcqVoltageSamples_IntClkDigStartAndRef.2008" to control the unit in c#

  If I set up the Starttrigger only, I can trigger... (the measure is to start by climbing aboard PFI0)

  ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  myTask.AIChannels.CreateVoltageChannel (physicalChannelComboBox.Text,"", (AITerminalConfiguration)(-1), rangeMin, rangeMax, AIVoltageUnits.Volts ");

  myTask.Timing.ConfigureSampleClock ("", sampleRate, SampleClockActiveEdge.Rising, SampleQuantityMode.FiniteSamples, 1000);

  myTask.Triggers.StartTrigger.ConfigureDigitalEdgeTrigger ("/ PFI0/Dev1", DigitalEdgeStartTriggerEdge.Rising);

  Reader = new AnalogMultiChannelReader (myTask.Stream);

  ...

  drive. SynchronizeCallbacks = true;

  drive. BeginReadWaveform (-1, New AsyncCallback (myCallback), null);

  ... MyCallback...

  data = reader. EndReadWaveform (ar);

  ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  Now, I want to stop my measurement by the trigger of the reference, so I set up the Referencetrigger on the same source (PFI0)

  myTask.Triggers.ReferenceTrigger.ConfigureDigitalEdgeTrigger ("/ PFI0/Dev1", DigitalEdgeReferenceTriggerEdge.Falling, 10);

  (This line is after the configuration StartTrigger)

  If I start the task and give the triggersignal, the measurement starts. But now the measure must stop if I start PFI0 again!

  I don't know what I have to do to become a measure from the beginning to trigger Stop... I mean PFI0 PFI0 rising Edge edge

  Thanks for the support!

  Suchen für alle die noch immer nach einer Antwort, ich habs jetz!

  For all who are looking for this answer, I get it now!

  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  myTask = new Task ("aiTask");        Create a new task
  Initialize local Variables
  Double sampleRate = Convert.ToDouble (rateNumeric.Value);
  Double rangeMin = Convert.ToDouble (minimumValueNumeric.Value);
  rangeMax double = Convert.ToDouble (maximumValueNumeric.Value);
  Create a virtual channel
  myTask.AIChannels.CreateVoltageChannel (physicalChannelComboBox.Text, "", (AITerminalConfiguration)(-1),
  rangeMin, rangeMax, AIVoltageUnits.Volts);
  Set up sync Specs
  myTask.Timing.ConfigureSampleClock ("", sampleRate, SampleClockActiveEdge.Rising, SampleQuantityMode.FiniteSamples, 1000);
              
  Configure start and reference triggers
  myTask.Triggers.StartTrigger.ConfigureDigitalEdgeTrigger ("/ PFI0/Dev1", DigitalEdgeStartTriggerEdge.Rising);
  myTask.Triggers.ReferenceTrigger.ConfigureDigitalEdgeTrigger ("/ PFI0/Dev1", DigitalEdgeReferenceTriggerEdge.Rising, 100);

  Check the task
  myTask.Control (TaskAction.Verify);
  Create the object reader
  Reader = new AnalogMultiChannelReader (myTask.Stream);
  Start the task, and set the playback position
  myTask.Start ();
  myTask.Stream.ReadRelativeTo = ReadRelativeTo.CurrentReadPosition;

  AnalogWaveform[temp];

  {while(!myTask.IsDone)}
  Temp = reader. ReadWaveform (60000);
  }

  myTask.Dispose ();

  --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

  Mit dieser Lösung kann man von mension zu messen mension.

  With this resolve you can measure from edge to edge.

• Do you need 'DAQmx start task' vi read from a device NI DAQ (NI 9205)?

  I have a NI 9205, which I use to get a waveform data. To get started quickly, I used the wizard DAQ Vi. The code below (FIGURE 1) is the acquisition of data help VI looked like when I convert LabVIEW code and made some minor adjustments.

  When I looked online to see how to get hardware DAQ data, many sources use the task start DAQmx in figure 2.

  DAQmx start using VI makes another?  Materials using DAQ assist in loop gives you a lack of performance?    If so, figure a will have a lack of performance too as it is basically the DAQ help code?

  FIGURE 1

  Hello sticyfinger,

  Help for the Start Task function:

  "If you do not use this VI, a measurement task starts automatically when execution of the reading DAQmx VI. Automatic start of theDAQmx VI entry write determines if a build task starts automatically when the execution of the writing DAQmx VI.

  If you do not use the DAQmx start task VI and VI task DAQmx stop when you use DAQmx Read VI or VI to write DAQmx several times, as in a loop, the task starts and stops several times. Start and stop a task repeatedly reduce the performance of the application. »

  Hope that helps!

• How to read / write to a HID device with call a library function?

  I had tons of problems to read from a device USB HID in VISA. I had no problem make a driver for him and write it in LabVIEW. However, whenever I try to read using Read Visa, Visa USB Control In or interrupt USB event get different types of error messages.

  I decided to give up this route and talk to the device through hid.dll, setupapi.dll and any other .dll that I need to use. The problem is that I'm not sure I correctly use the nodes to call a library function... I've seen several KB articles that explain how to set up the nodes call library feature, but I need more information. I can configure stuff and sometimes get things to work, but I don't always know what each specific selections in Settings tab is doing. Can someone give me more detailed information on what do the settings tab and all of its components?

  Thank you

  Matt

  Have you looked HERE?

  Shane.

• Satellite A100 - ATI Vista driver moved - cannot read from device

  Hello

  I have the following problem:

  I downloaded the official Toshiba mobility driver for Windows Vista 32-bit (I had a Satellite A100 (PSAA9) for construction in mobility x 1400.

  Once I run the Setup, it will install the ccc, but the real driver, no matter what I do! If I try to install the driver manually, Windows says

  "Unable to read from the device (ATI Mobility X 1400).

  As an error during the installation. It will not work in safe mode, either.
  If anyone can help? Thx a lot!

  Greetz Jens

  Hello

  First are you sure that you have an ATI graphics card?
  The Toshiba driver page provides 2 different graphics drivers for A100 PSAA9E series; nVidia and ATI.
  Find out!

• Cannot access a HID device get code 5 error please let me know how to access a HID device, I need an example of code to access a HID device in windows 7.Thanks.R.M. Kiran

  /*******************************************************
  Simplification of Windows HID

  Alan Ott
  Software signal 11

  22/08/2009

  Copyright 2009, all rights reserved.
   
  The contents of this file can be used by anyone
  for any other reason without conditions and can be
  used as a starting point for your own applications
  that appeal to HIDAPI.
  ********************************************************/

  #include
  #include
  #include
  #include
  #include "hidapi.h".

  The headers needed to sleep.
  #ifdef _WIN32
  #include
  #else
  #include
  #endif

  int main (int argc, char * argv)
  {
  int RES;
  unsigned char buf [256];
  #define MAX_STR 255
  WSTR wchar_t [MAX_STR];
  hid_device * handle;
  int i;

  WIN32 #ifdef
  UNREFERENCED_PARAMETER (ARGC);
  UNREFERENCED_PARAMETER (argv);
  #endif

  struct hid_device_info * devs, * cur_dev;
     
  devs = hid_enumerate (0x0, 0x0);
  printf ("id=%d\tsproduct id = %d\n",devs-> vendor_id provider, devs-> product_id ");
  cur_dev = devs;
  so that {(cur_dev)
  printf ("detecte\n device type: % 04hx %04hx\n path: %s\n Serial_number: %ls", cur_dev-> vendor_id, cur_dev-> cur_dev-> path, product_id, cur_dev-> Serial_number);
  printf ("\n");
  printf ("manufacturer: %ls\n", cur_dev-> manufacturer_string ");
  printf ("product: %ls\n", cur_dev-> product_string ");
  printf ("output: %hx\n", cur_dev-> release_number ");
  printf ("Interface: %d\n", cur_dev-> interface_number);
  printf ("\n");
  cur_dev = cur_dev-> next;
  }
  hid_free_enumeration (devs);

  To implement the command buffer.
  Memset (buf, 0x00, sizeof (BUF));
  buf [0] = 0x01;
  buf [1] = 0x81;

  Open the unit by using the VID, PID,
  and possibly the serial number.
  handle = hid_open (0x4d8, 0x3f, L "12345");
  handle = hid_open (0 x 0461, 0x4d81, NULL);
  If (! handle) {}
  printf ("cannot open device\n");
  Return 1;
  }

  Read the manufacturer string
  WSTR [0] = 0x0000;
  RES = hid_get_manufacturer_string (handle, wstr, MAX_STR);
  If (res<>
  printf ("could not read the manufacturer string\n");
  printf ("string of the manufacturer: %ls\n", wstr ");

  Read the product chain
  WSTR [0] = 0x0000;
  RES = hid_get_product_string (handle, wstr, MAX_STR);
  If (res<>
  printf ("cannot read string\n product");
  printf ("string of product: %ls\n", wstr ");

  Read the serial number string
  WSTR [0] = 0x0000;
  RES = hid_get_serial_number_string (handle, wstr, MAX_STR);
  If (res<>
  printf ("could not read the serial number string\n");
  printf ("string of serial number: (%d) %ls', wstr [0], wstr");
  printf ("\n");

  Read the indexed string 1
  WSTR [0] = 0x0000;
  RES = hid_get_indexed_string (handle, 1, wstr, MAX_STR);
  If (res<>
  printf ("could not read the string indexed 1\n");
  printf ("indexed 1 string: %ls\n", wstr);

  Define the function hid_read() as non-blocking.
  hid_set_nonblocking (handle, 1);
     
  Try reading from the device. It is and must be without
  given here, but enforcement should not block.
  RES = hid_read (handle, buf, 17);

  Send a report on the device
  buf [0] = 0x2;
  buf [1] = 0xa0;
  buf [2] = 0x0a;
  buf [3] = 0x00;
  buf [4] = 0x00;
  RES = hid_send_feature_report (handle, buf, 17);
  If (res< 0)="">
  printf ("cannot send a feature report. \n") ;
  }

  Memset (buf, 0, sizeof (BUF));

  Read a report of the device
  buf [0] = 0x2;
  RES = hid_get_feature_report (handle, buf, sizeof (buf));
  If (res< 0)="">
  printf ("failed to get a feature report. \n") ;
  printf ("%ls", hid_error (handle));
  }
  else {}
  Print the buffer returned.
  printf ("function Report\n");
  for (i = 0; i< res;="">
  printf ("% 02hhx", buf [i]);
  printf ("\n");
  }

  Memset (buf, 0, sizeof (BUF));

  LED toggle (cmd 0x80). The first byte is the report number (0 x 1).
  buf [0] = 0x1;
  buf [1] = 0x80;
  RES = hid_write (handle, buf, 17);
  If (res< 0)="">
  printf ("could not write () \n");
  printf ("error: %ls\n", hid_error (handle));
  }

  Status request (cmd 0x81). The first byte is the report number (0 x 1).
  buf [0] = 0x1;
  buf [1] = 0x81;
  hid_write (handle, buf, 17);
  If (res<>
  printf ("impossible to write() (2) \n" ");

  Read the requested State. hid_read() has been set to be
  non-blocking by the call to hid_set_nonblocking() above.
  This loop shows the non-blocking of hid_read() nature.
  Res = 0;
  While (res == 0) {}
  RES = hid_read (handle, buf, sizeof (buf));
  If (res == 0)
  printf("waiting...\n");
  If (res<>
  printf ("could not read () \n");
  WIN32 #ifdef
  Sleep (500);
  #else
  usleep(500*1000);
  #endif
  }

  printf ("read data: \n");
  Print the buffer returned.
  for (i = 0; i< res;="">
  printf ("% 02hhx", buf [i]);
  printf ("\n");

  hid_close (handle);

  / * Free of static objects of HIDAPI. */
  hid_exit();

  WIN32 #ifdef
  System ("pause");
  #endif

  return 0;
  }

  Hi KIRAN RM,.

  Given that you need example code to access a HID device in windows 7, the question you have posted is better suited for the MSDN Forums. Please post your query in the link next to the support of the MSDN forum for further assistance.

  Windows hardware development

• How to read the multiple slave devices in a RTU modbus RS485 2-wire network without changing slave address manually?

  Hello

  Currently, I can read data out of multiple using the attached VI DAQ devices by manually changing the address of the slave on the front panel that determines what slave to read the data. However, I want the VI to do it automatically for me instead of me manually by clicking on the buttons on the front panel to change the address of the slave. In other words, the VI should read data off devices 3 slaves and save them to a database of all the 1 second (sampling from 1 sec interval). I tried to use the structures of the case, timed sequences and delays, but I'm still not able to get what I wanted. My current VI is a modified version of a VI library modbus - 'MB series Master query read input registers'. No idea how to do this?

  IM pretty new to LabVIEW, so don't kill me if im away here

  Could replace the cluster 'Series settings' with the attached structure solve this problem?

  The real deal will be just the value back to the default (1).

  -Tom

• How to copy a profile for a child from one device to another family safely direct windows for Windows 7

  How to copy a profile for a child from one device to another family safely direct windows to Windows 7? I have several devices on Windows 7 and my child has ins journal to each device. I want safety to be entirely copied from one to the other devices. How can I do?

  Hello

  Thanks for posting your question on the Microsoft community.

  Thank you for your query details.

  I also appreciate your concerns about security for the family.

  I suggest to read the following article and check.
  Reference:
  http://Windows.Microsoft.com/en-us/Windows/set-up-family#set-up-family=Windows-7

  See also this wiki article created by Lonnie_L on August 24, 2013.
  Family Safety: frequently asked Questions
  http://answers.Microsoft.com/en-us/Windows/wiki/windows_other-security/family-safety-frequently-asked-questions/5672f7b2-e3c0-498a-9a6c-c9cab39f68e5

  I hope this information helps.

  Please let us know if you need more help.

  Thank you

• How to read the data in a device connected to the usb port

  Is there a class or object, or the piece of code in Java that is comparable to the PDQComm32.ocx and the mscomm32.ocx used in VB6? I need to know how to read the data of a device plugged into the usb port of the BBerry. Is it possible to use the BB to read data from a device via a usb cable?

  I'm new in Java and I'm looking for the opportunity to write a project to read the data in a device with this program that can turn on a BB instead of on a pc.

  Thank you

  Did you watch net.rim.device.api.system.USBPort?

  That's what the doc says:

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  Avoid using this class in applications, as it is not portable. On the contrary, if you need to access the USB port, use factory CLDC Connector to serve a connection.

  Rab

• How to print from microsoft reader

  How do you print a document from Microsoft reader. If I try to pint I tells me to set a default value in the control panel but can't find something to do. How I print these documents now is to open in Adobe reader and print it from there. It seems the MS Reader device.

  Hi Brian,.

  Thank you for your message and give us the opportunity to help you.
   
  I understand that you want to print from the Reader app.
  It is possible to print using the application once from the devices option in the bar of charms.
   
  You can use this link to set the default player application to view the .pdf files.
  http://Windows.Microsoft.com/en-us/Windows-8/choose-Programs-Windows-uses-default
  Refer to the section "to associate any type of file or Protocol with a program" on the article.
   
  Windows player: Frequently asked Questions can be found here.
  http://Windows.Microsoft.com/en-us/Windows-8/reader-FAQs
   
  Feel free to use the forum for any other issue of Windows, you may have.

• -What it means and how to fix it? iTunes could not connect to the iPhone from the iPhone Simon Young, because an invalid response was received from the device.

  iTunes could not connect to the iPhone "IPhone by Simon Young", because an invalid response was received from the device.

  You have upgraded to iTunes 12.5.1? iOS10 requires iTunes 12.5.1 find which demands in turn 10.9.5 OSX or newer.  Software update checks only the updates to the current version of the system that you are running but that itself can be updated.  It may or may not be possible to upgrade your computer to the system requirements. Find your computer on the web site of http://www.everymac.com model and near the bottom of the specification of the system section, he will tell what versions of the operating system, it is able to run. You can try to install the free El Capitan OSX 10.11.  El Capitan can run slower on older machines and require the additional purchase of RAM (4 GB is a minimum realistic and many recommend 8 GB).  Making a big jump in versions of system is also more likely to affect the old software.

  At el capitan Snow Leopard, it will make my macbook is slow?  - https://discussions.apple.com/thread/7412959

  Course OSX Upgrade General information, including configuration required - http://www.apple.com/osx/how-to-upgrade/

  If you have any generation of PPC software which works under OSX 10.6 it is not supported in later versions of the system.

• How to read messages from a blocked number?

  How to read messages from a blocked number?

  You do not have.

  You need to unlock and then you can read the messages that comes after unlock it.

• How to stop receiving messages from text from other devices

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  Can you give us some more information please? Are you getting these texts in all of your devices, or family members?

  If you are getting the texts family members and share one Apple ID, that's why.

• How to read continuously from the rs232?

  Hello

  I'm new to LabVIEW and my questions would be obvious for some for you. So please help if you know the solution.

  It's for my school project. For your information, we need to schedule a Committee of Altera DE2 to control traffic lights (something like that) and at the same time, the Commission shall forward the States of enlightenment to a computer with LabVIEW installed via an RS-232 cable.

  The rest of the project was fine except for the part of LabVIEW, because as I said earlier, I'm new to LabVIEW.

  We use the "basic series write and Read.vi" in the folder examples of NEITHER. The problem is that we do not know how to change the vi in order to receive the data that come the DE2 Board permanently. Each time, the vi stops reading after receiving 24 bytes of data.

  So, the first question is:
  1.) how to read continuously from the RS-232 port? (We tried to use while "loop" but without success, maybe we were doing it the wrong way.) If you know the solution, please enlighten us for us in a detailed manner.

  (2) Secondly, once we have received the 'chain', how can convert us to bits (0 and 1) so that we might be able to manipulate the bits, for example turn on the LEDs that correspond to the bits.

  Thank you.

  Instead of reading the bytes of the port so to read that many bytes (which may be zero), just do a VISA read for 1 byte.  He will wait for this next byte.

  To get an array of Boolean out of this byte, use this code.  He turns the characters into a byte array.  Takes the first and the only element of this array, and then converts this single U8 number into an array of bytes.

  

  Which country are you?  I've never seen or heard lights orange before.  Only the yellow lights.

• How to read the data from a channel named in windows using labview

  Hello

  I need to read the channel named in windows data. The pipe is created by python by another application. This application post permanent data on the pipe. But I don't know how to read data using labview. is it possible to read the data from different application? If possible, how to start?

  Thanks in advance

  concerning

  RJ

  Hi Rolf,.

  It's just, because of driving is not initialized completely, pipe read returns error 42, I added 2 seconds late, then its work perfect.

  Thank you very much.

  Concerning

  RJ