LMH2832EVM-75:

Prodigy 80 points

Replies: 16

Views: 361

Part Number: LMH2832EVM-75

Hello,

I am trying to use the LMH2832evm board but the device on the board does not seem to be accessible in terms of R/W to its register.

I followed exactly the TI Guide. The USB interface is working as I can read the device ID, FTDI chip is accessible but when I use the GUI, all registers values are always "FF".

There is no Read or Write working.

The device on the board is not dead beacuse I see that it does amplify an input signal but the gain is always constant. It cannot be chenged through register.

It is as if the SPI interface between FTDI and LMH2832 chip does not work.

Thanks to let me know what can be done,

Best regards,

michel

16 Replies

  • In reply to michel dhoe:

    Hello Michel, 

    We will be trying the LMH2832 EVM board on our end and will get back to you in a day or two.

    Thank you,

    Sima Jalaleddine

  • In reply to michel dhoe:

    Hello Michel,

       I was unable to locate the exact EVM onsite and will need to order one which will take a couple business days to ship. I will have an update once I receive and have tested the EVM on our side. 

    Thank you,

    Sima Jalaleddine

  • In reply to michel dhoe:

    Hi Michel,

       I was able to obtain the LMH2832EVM-75 and able to successfully communicate between the EVM and the GUI. I could read and write from the registers and I tested this by powering down the device using the Power-Down Control Register address 3. My setup consisted of the LMH2832EVM-75, 5V Bench Power Supply, a male to mini-USB b cord, and a PC with the GUI installed. I did run into a driver problem which was fixed by downloading FT245R D2XX Drivers from this website. I also ran into a library problem which was fixed by reinstalling the GUI. I would suggest reinstalling the GUI and downloading the specific driver I have linked. 

    Thank you,

    Sima

  • In reply to SimaJalaleddine:

    Hello Sima,

    Thank you for your answer and investigation.

    Definitely nothing to do with my board. Is there a way to get another one a litle bit cheaper than the market price ?

    Thanks

    Best regards,

    Michel

  • In reply to michel dhoe:

    Hello Michel,

        I do not know of any other way to get this same EVM board for cheaper than the market price. Though, I would strongly recommend following the setup procedure I posted above if you have not done so already. I also forgot to mention that I had to download 2014 LabView Runtime to get the GUI to work.  

    Thank you,

    Sima

  • In reply to michel dhoe:

    Hello Michel,

       Were you able to get a successful communication between the GUI and EVM?

    Thank you,

    Sima