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ADS122C04EVM: ADS122C04EVM

Eitan Pollack
Prodigy 40 points
Part Number: ADS122C04EVM
Other Parts Discussed in Thread: ADS112C04, ADS122C04

I installed the device package. When i connect the evaluation board, both LEDs turn on, but the Evaluation software doesn't recognize the board. I don't see any device connected, and on the bottom row it sais 'hardware not connected'. Please assist. 

  • 0
    TI__Guru** 113765 points

    Hi Eitan,

    Welcome to the E2E forum!  There are two parts to the GUI.  The first part that also needs to be installed first is the Delta-Sigma ADC EvaluaTIon software.  After this installation the ADS122C04EVM device package should be installed.  Both of these installations require administrator privilege to install.

    Make sure that the correct device package is being used for the EVM you are using.  There are two similar EVMS with one being ADS122C04 which is the 24-bit version of the ADC and the ADS112C04 which is the 16-bit version.

    If the EVM was plugged into the USB before the software was installed, there may be an association where the driver is unknown for USB bulk.  You can go to Device Manager and check to see if the there is an unknown device listed.  You should see either a generic USB bulk device or possibly a Tivaware USB bulk device.  If the device in unknown or indicates that the driver is not properly associated you will need to manually associate the driver.

    The following post has a similar issue.  Although the device/EVM is different, the process to follow would be the same.

    https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1046925/ads124s08evm-evaluation-gui-refuses-to-download-usb-drivers-necessary-for-running-evm/3872731#3872731

    Best regards,

    Bob B

  • 0 in reply to Bob Benjamin
    Prodigy 40 points

    Thanks Bob, everything worked out in the end. I want to use the EVM to read a load cell, using an external microcontroller. Can you please explain to me how this is done, or refer to a guide? My microcontroller is Arduino (uno). Thanks

  • 0 in reply to Eitan Pollack
    TI__Guru** 113765 points

    Hi Eitan,

    The easiest way to get an external processor connected to the EVM is to first install a jumper at position JP1.  You can install a header or solder a wire between the pin holes.  JP1 is on the right-hand side of the EVM near the USB connector.  Installing this jumper will hold the EVM processor in a reset state and will also disable the level-shifter devices used to pass signals from the onboard micro to the ADS122C04.

    Next, you will need to make some connections from the Arduino to the EVM at J3.  It is easiest if you just solder some header pins and add the required jumper wires between the two boards.  The important connections are SCL, SDA, RESET (must be pulled high for the ADC to work) and the supply connections.  Here I would suggest that you keep things simple by just plugging the EVM to a USB connection to power the EVM and then just connect the grounds together between the Uno and the EVM.

    Best regards,

    Bob B