PGA460: about echo data dump function

Hi Ryusuke,

Thank you for posting to Sensors forum!

To help clarify, are you trying to do an echo data dump or a direct data burst, as these are two different means to collect data? Also, could you further clarify the unexpected behavior that you are seeing? Some waveforms would be very useful in helping to visualize the issue.

Best,

~Alicia

Hi Alicia,

My customer is trying to do in echo data dump mode.

I will ask the customer about the waveform and other unexpected behavior.

Best Regards,

Ryusuke

Hi Ryusuke,

Thanks for letting me know. Please keep me updated on the waveforms from your customer.

Best,

~Alicia

Hi Ryusuke,

Just wanted to follow up to check if you were able to get the waveforms from your customer.

Best,

~Alicia

Hi all,

Sorry for the pause.
I hope you will allow me to use the thread as it is.

I have received an inquiry from Ryusuke,
I would like to confirm this directly.

Thank you very much.

Toru

Hi all,

To properly tune an ultrasonic system or,
to accurately adjust the time-varying gain and threshold,
We would like to use the echo data dump function for the purpose of properly tuning the ultrasound system and accurately adjusting the time-varying gain and threshold.

First, we would like to check what kind of data can be obtained by the echo data dump function,
I tried to operate the function using control procedures (1) and (2), but the values of the setting procedures may be different,
However, the data was not sent from the PGA460, possibly due to a difference in the setting procedure.
(The ultrasound measurement result commands other than the echo data dump function can be executed.)

We have obtained the waveforms at the time of saving the on-board memory data in the control procedure (1).
(1) On-board memory data storage
  On-board_memory_data_storage_scope_0.png
    Yellow: TX of PGA
    Green: RX of PGA
  On-board_memory_data_storage_scope_1.png
    Yellow: TX of PGA
    Green: PGA clock

Please let me know if there are any setting procedures or countermeasures.

Best Regards,

Toru

Hi Toru,

Thank you for the additional information. I'll need some time to look it over and will aim to provide a response by the end of the week.

Best,

~Alicia

Hi Toru,

We do have Code Examples (via an Energia Library) for this device which does include how to use the echo data dump to get a distance measurement which may help you in using the echo data dump function.

Please let me know if this helps.

Best,

~Alicia

Hi Alicia,

Thank you for the information.
We will first review the information you provided.

Best Regards,

Toru

Hi Toru,

Sure. When you finish reviewing it, please let me know if it was able to resolve your question or if you still have additional questions.

Best,

~Alicia

Hi Alicia,

We have checked the operation of the software using the information provided in the Software Development Guide,
We would like to confirm the Echo Data Dump Profile.

・Get Echo Data Dump Profile
First of all, could you tell me what information can be read out when this command is executed?
(Because we would like to check first if the information we are expecting matches the information that can be read.)

Next, let us confirm the processing.
After this command is executed, data (128 bytes) is stored in EDD Memory,
After this command is executed, the data (128 bytes) will be stored in EDD Memory,
and the information will be acquired from EDD Memory after a certain period of time has elapsed.
(I thought it would be the same operation as when measuring ultrasound results, and 128 bytes would be sent together.)

I apologize if my understanding is wrong.

Best Regards,

Toru

Hi Toru,

K.Toru said:

Get Echo Data Dump Profile
First of all, could you tell me what information can be read out when this command is executed?

The Echo Data Dump function allows for the data at the output of the digital data path to be extracted in a raw digital format. For more detailed information please see section 7.3.7 Echo Data Dump in the datasheet. This function can be used for any of the 4 BURST/LISTEN or LISTEN ONLY commands which are described in section 7.3.6.1.1 RUN Commands of the datasheet.

Regarding what occurs after an Echo Data Dump is executed, please see below snippet from the datasheet:

Hopefully this helps.

Best,

~Alicia

Hi Alicia,

Thank you for the information.
First, I would like to confirm the on-board memory data storage functionality.

I obtained the data based on the example implementation of the data dump for on-board memory data storage.
After executing DATADUMP_EN=1, P1_REC set, burst/listen (preset 1),
I was able to read 128 bytes of data by reading from EDD Memory,
How can I judge the validity of the data read out?
(I am able to read out something, but I am not sure if it is a normal value or not.)
Also, is the data you were able to read the maximum peak value (Amplitude) out of 64 samples correct?

Best Regards,

Toru

Hello Toru-san,

Alicia is currently out of the office today. She will review your response when she is back on Monday, thank you for your patience!

Best,

Isaac

Hi Toru,

One of the things that you can do to help ensure that your data is valid is by checking the Diagnostic Field (described in section 7.3.6.2.1.7 Diagnostic Field of the datasheet) to ensure that no error has occurred.

K.Toru said:

Also, is the data you were able to read the maximum peak value (Amplitude) out of 64 samples correct?

To clarify, is this in reference to the highlighted below?

Best,

~Alicia

Hi Alicia,

Sorry for the delay in getting back to you.
I understood that the decision will be made in the diagnostic field.

Best Regards,

Toru

Hi Toru,

Thanks for letting me know! Was this able to answer all of your questions? Are there any other questions that you have regarding this topic? Please feel free to let me know.

If your questions have been answered, please mark this thread as resolved.

Best,

~Alicia

Hi Alicia,

Let me also check on direct data bursting.

・Direct Data Burst
When a UART command is used after setting the DP_MUX parameter, it is recognized that data can be received in response to the UART command,
I am aware that data can be received according to the UART command after setting the DP_MUX parameter,
Is this correct?
(This applies to send/receive, receive only, and temperature reading commands.)

Data stream
+--------------+---------------+-----+----------------+-----------------+
| Diag Data | Data-1[0:7] |  ...  | data-N[0:7] | chksum[0:7] |
+--------------+---------------+-----+----------------+-----------------+

Also, by setting DP_MUX=0x1-0x4,
The source signal to be bursted from the device can be selected.
　DP_MUX=0x0: Disable
　DP_MUX=0x1: LPF output
　DP_MUX=0x2: Rectifier output
　DP_MUX=0x3: BPF output
　DP_MUX=0x4: ADC output
※When data burst is enabled, object detection and measurement are disabled.

Set DP_MUX based on the information you want to obtain, and then execute the command,
Is it correct to say that information can be acquired by setting DP_MUX based on the information to be acquired and then executing the command?

We would appreciate an answer by 6/30.

Best Regards,

Toru

Hi Alicia,

What do you mean by a send/receive, receive only, or temperature reading command?
Is the following correct?
　The command that is marked "PGA460 response available" in the command list of the UART interface.

Please expand the information if there is any discrepancy in the above recognition.

Best Regards,

Toru

Hi Alicia,

Sorry for the delay in responding.

Regarding the echo data dump,
I would like to use it for different purposes.
I will contact you if I have any further questions or concerns.

Best Regards,

Toru