AFE5818EVM: Problem with data capture and automation using TSW1400EVM

Hi Chaithra,

Thanks for reaching out.

Please find my response inline.

1) Even though the input waveform is same, everytime we press on the 'Capture' option, the waveform displayed is different on each capture. How do we solve this? (We have attached the screenshots from HSDC Pro below for the reference, the three images correspond to the same waveform acquired thrice as consecutive captures).

TI: I think there is a timing mismatch between each capture and hence you are not seeing the same waveform. Please use the trigger capture option in the EVM and HSDC pro to syncronize the timing of the consecutive capture. Ensure to align the signal with respect to the tx_trig signal on the EVM and J11 EXT_Trigger input on the TSW capture card.

2) How do we automatically save the captured data? If we want to continuously capture and save wave forms for multiple times, how should we do it without manually exporting excel files through 'File' option? 3) How can we integrate AFE5818 with LabView so that we can use it for automating the system we are building? If we need the source code for the same, how should we proceed?

TI: For HSDC automation related questions I am assigning this thread to Jim who is the expert in the HSDC pro automation. Standard example of automation using matlab can be found here https://www.ti.com/tool/DATACONVERTERPRO-SW HSDC Pro MATLAB Ping Pong Automation Example.

I am not sure if automatic saving of the captured samples is possible. But you can refer to the following threads and see if you can implement similar things.

https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/941221/tsw14j56evm-hsdc-pro-automation

https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1074745/tsw14j56evm-continuous-data-capture-using-automation-dll

I will let Jim answer the queries related to HSDC Pro and TSW capture process.

Thanks & regards,

Abhishek

Chaithra,

I do not know much about the AFE5818, but no ADC is perfect and every capture will be slightly different due to the lower bits of the ADC toggling.

For your other questions, please see the attached HSDC Pro User's Guide.

Regards,

Jim

HSDC Pro User's Guide Rev C.pdf