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FDC2112: We are facing some software issues and hardware problem

Rajesh RAJESH
Prodigy 40 points
Part Number: FDC2112
We are the leading tier 1 automotive manufacturers in India.
We are developing a Capacitive type fuel level sensor for Commercial vehicle application.
We are using FDC 2112 part no, initially we have done the POC for test and verification
On that we are facing the below issue:
1. FDC 2112 to Controller data not receiving
2. The output of data from FDC 2112 is 0 level
3. We are testing open conditions, Is it should be with Fluid level only?
We need the completed working software code for testing
  • 0
    Prodigy 40 points

    Part Number: FDC2112

    Dear TI team

    This is Rajesh from UCAL LTD, Chennai
    We are the leading tier 1 automotive manufacturers in India.
    We are developing a Capacitive type fuel level sensor for Commercial vehicle application.
    We are using FDC 2112 part no, initially we have done the POC for test and verification
    On that we are facing the below issue:
    1. FDC 2112 to Controller data not receiving
    2. The output of data from FDC 2112 is 0 level
    3. We are testing open conditions, Is it should be with Fluid level only?
    We need the completed working software code for testing
    Please find attached the schematic  . please suggest any changes required
    We need a separate meeting with you for detailed technical discussion
    Please support
  • 0
    TI__Mastermind 44050 points

    Hi Rajesh,

    I don't see a schematic attached.  Can you please re attach?

    It sounds like your controller is not establishing I2C communication.  Can you also provide some captures of the failed communication?  

  • 0 in reply to Rajesh RAJESH
    TI__Mastermind 44050 points

    Rajesh,

    The schematic looks okay.  Can you provide some further troubleshooting data?  Can you establish successful I2C communication, but the output is always zero?  Can you probe the sensor connections at J1?  Do you see the sensor output?  

    Even with no fluid, you should still see some output higher than zero, which leads me to believe you may not have a signal at J1.  

  • 0
    Prodigy 50 points

    Part Number: FDC2112

    Dear TI team

    This is Sandhya from UCAL LTD, Chennai
    We are the leading tier 1 automotive manufacturers in India.
    We are developing a Capacitive type fuel level sensor for Commercial vehicle application.
    We are using FDC 2112 part no, initially we have done the POC for test and verification
    On that we are facing the below issue:
    1. FDC 2112 to Controller data not receiving
    2. The output of data from FDC 2112 is 0 level
    3. We are testing open conditions, Is it should be with Fluid level only?
    We need the completed working software code for testing
    Please find attached the schematic  . please suggest any changes required
    We need a separate meeting with you for detailed technical discussion
  • 0 in reply to sandhyarani vankayalapati
    TI__Mastermind 44050 points

    Hi Sandhyarani,

    Please see the thread above.  We will need some more information to debug.  In addition to the scope shots I requested above, can you provide the details of your capacitive sensor?  I would like to ensure that the LC tank frequency falls within the specification shown below.

  • 0 in reply to Eddie LaCost
    Prodigy 50 points

    Hello sir,

             From IN0A and IN0B pulse is not generated and from SD 2.5v is generating

  • 0 in reply to sandhyarani vankayalapati
    TI__Mastermind 44050 points

    If your SD pin is at 2.5V, the device is in shutdown.  You need to drive this signal low from the connected microcontroller.