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Original question:

LDC1101EVM: LDC1101 Communication Protocol

LDC1101: Data Decoding

VIVEK RAJ
Prodigy 40 points
Part Number: LDC1101

Hello everyone,

I am using LDC1101 EVM and am pleased to use it.

It is very accurate and has high resolution.

But I am now decoding the data and cannot understand how to do it.

Below is where I am facing the issue. These are Rp+L data I try to decode.

68000000005A8E5A
68000000005A965A
68000000005A9E5A
68000000005AA65A
68000000005AAE5A
68000000005AB65A
68000000005ABE5A
68000000005AC65A
68000000005ACE5A
68000000005AD65A
68000000005ADE5A
68000000005AE65A
68000000005AEE5A
68000000005AF65A
68000000005AFE5A

Please someone tell me what are these results. Can somebody tell me how I can convert this type of data into Rp and L data?

Best Regards,

Vivek

  • 0
    TI__Mastermind 18545 points

    Hello Vivek, 

    If you are using the LDC1101EVM FW protocol to stream the Rp+L data, then your data is formatted as described in the LDC1101 EVM User Guide: 

    For the data you showed, it seems that the Status register is always 0x68 which has the "No new conversion data available flag" set. 

    Your data is always 0 which matches with the expectations for not having a conversion ready to read. Make sure you are configuring and enabling the device before you send the start data streaming command. Then you should be seeing the Rp+L data populate the 0's in your data. 

    Best Regards, 

    Justin Beigel

  • 0 in reply to Justin Beigel
    Prodigy 40 points

    what will be the commands and how to write in relaterm? This command is binary but how i can send it. Please help its urgent. I am newbie in digital communication and electronics. Thats why I am asking. I read the whole document but i cannot understand how to send which commands in an ordered sequence

  • 0 in reply to VIVEK RAJ
    TI__Mastermind 18545 points

    Hello Vivek, 

    I am not familiar with relaterm but the commands for writing registers will start with '02' and are followed by the register address and register data. 

    For example, if you want to write the START_CONFIG register (0x0B) to be active conversion mode (0x00), you would send: '020B00'.

    Best Regards, 

    Justin Beigel