Does VISA-USB sets for Hig-speed mode or full-speed mode?

[IsaacLescano]

Hello,

I am using Labview program with VISA-USB raw mode and the labview generic driver to receive data from a CY7C68001 USB contoller in a custome digital board.

The labview program runs on a new Dell Precision 690 workstation.

I have done several tests and it seems that the labview program and the CY7C68001 are in full-speed mode.

I need to use high-speed mode.

Does VISA-USB sets at full-speed mode or high-speed mode?

Can I configure the VISA-USB to work only at high-speed mode?

Thank you,

Isaac

[A_Ryan]

Hello Isaac,

In order to set the device to high speed mode, you will need to send the appropriate commands to the CY7C68001 USB controller.  The user manual for the device should have the command set that will allow you to setup this functionality.  Yes, you can configure VISA to communicate with the CY7C68001 USB controller in high speed mode.  Another thought would also be to check to ensure the USB port is 2.0.  Here are some additional resources: VISA USB RAW Mode - Transmission Speed BulkIn , USB Raw, What is the Difference Between USB Raw Control and USB Raw Bulk?

[IsaacLescano]

I have programmed my usb controller cy7c68001 to work at high-speed mode but the VISA driver does not recognize it.

How do configure VISA to work with the raw USB high-speed mode?

Thank you,

Isaac

[A_Ryan]

Isaac,

Can you confirm that you are using a 2.0 USB port?

- you may want to try different USB ports on the computer to see if this effects performance

- the settings for the USB port speed can be found the BIOS

NI-VISA is a layer of communication, the USB port and device are some of most common factors that contribute to these types of situations. 

Have you tried this device with another computer?

- what were the results?

Can you post a screenshot of the code?