AM6421: AM6421 AND Ethernet-IP Adapter custom explicit message

Hi Narasimha,

Thanks for your query.

I will check on this and get back to you.

Best Regards

Ashwani

Hi Ashwani,

      Can you update for our above query.

Thank You.

Hi Ashwani,

We are at a critical juncture with respect to our delivery and ned your support for the same to clarify. 
Thank you

Hi Avinash,

Narasimha Rao said:

How do we handle Explicit Messages and Implicit messages in the current SDK 9.00.03.

Our stack partner is looking into this. However, to ensure we fully understand your needs, could you please clarify what exactly you mean by "handling custom Explicit Messages"?

Narasimha Rao said:

Do you have any sample code for handling custom Explicit Messages in Ethernet-IP in Industrial Communication SDK 9.00.03.

What kind of "handling" are you trying to achieve? Actually, we think this is the key point so we can fully understand your need.

Narasimha Rao said:

Please Note We could get device Id ,device Slno using explicit message however custom class data could not get.

Typically, you would access “custom class data” in the same way as you access other objects, instances, or attributes. Unless you have not packed your "custom class data" into EIP class attributes. If this is not the case, please provide more details, and we'll assist you accordingly.

Best Regards

Ashwani

Hi Ashwani,

Narasimha Rao said:
How do we handle Explicit Messages and Implicit messages in the current SDK 9.00.03.
Our stack partner is looking into this. However, to ensure we fully understand your needs, could you please clarify what exactly you mean by "handling custom Explicit Messages"?

There are 2 types of messages.  Implicit and Explicit Messages. Implicit messages are for transferring real time data. Explicit messages are for Non-realtime data. 
We are using device profile Discrete_IO_Device.  In our case we are fine with Implicit messages. However with Explicit message like "Get time spent" from device. 
We have more that 100+ such messages. This we are referring to as custom messages. 
This is more like client server like exchange of data between controller and device. 
Please let us know if this brings in clarity.   

Narasimha Rao said:
Do you have any sample code for handling custom Explicit Messages in Ethernet-IP in Industrial Communication SDK 9.00.03.
What kind of "handling" are you trying to achieve? Actually, we think this is the key point so we can fully understand your need.

Explained above.

Narasimha Rao said:
Please Note We could get device Id ,device Slno using explicit message however custom class data could not get.
Typically, you would access “custom class data” in the same way as you access other objects, instances, or attributes. Unless you have not packed your 
"custom class data" into EIP class attributes. If this is not the case, please provide more details, and we'll assist you accordingly.

Explained above.

We would appreciate if you could share a sample code, how Explicit messages can be added so that we can send application specific messages.

 Thank You.

Hi Ashwani,

Hope you are able get in touch with stack partner. Do you have feedback from them.

Appreciate if you can take this up on priority as we need to delivery to end customer.

Thank You 

Hi Narasimha,

Thanks for follow-up.

I have forwarded your message with priority to stack partner. Waiting for response.

Thanks for allowing some time to check and get back to you.

Ashwani

Hi Ashwani,

Hope you are able get in touch with stack partner. Do you have feedback from them.

Appreciate if you can take this up on priority as we need to delivery to end customer.

Thank You 

Hi Ashwani,

Hope you are able get in touch with stack partner. Do you have feedback from them.

Appreciate if you can take this up on priority as we need to delivery to end customer.

Thank You 

Hi Aswani,
Any news from your stack vendor ??

Avinash

Hi Avinash,

For explicit communications, you can access any attribute of custom classes/instances you have set up.

See 'app_generic_device.c', function EI_APP_GENERIC_DEVICE_cipGenerateContent().
There you can see how class (id:0x70), instance (id:0x1) and attributes (120 of various types, starting from id:0x300) are created.

Running the “generic device” example, you can make explicit calls against that class:

Please, let us know if this is helpful or if we are misunderstanding your requirement ?

Thank you very much for your patience.

Best Regards

Ashwani

Hi Ashwani,

   We tried to run the "generic device" example as suggested above using the ind_comms_sdk_am64x_09_00_00_03 on the AM64x EVM, but in the logs we observed an error that that data is corrupted. I have attached the logs below. Can you please clarify this issue.

Thank you.

Thanks Mamatha,

I will check and get back to you.

Best Regards

Ashwani

  Hi Ashwani,

     After detailed analysis we still see Explicit messages are not supported. We are able to fetch the information from the Class/instance/Attribute to controller as static information. However, this is possible only if the Class is updated in  EI_APP_GENERIC_DEVICE_run(). All implicit messages/Cyclic data are handled in this function.

We could not find how the Explicit message are update in the class outside of  EI_APP_GENERIC_DEVICE_run() function.

  Appreciate if you could provide insight into how Explicit message are updated and the API for the same.

Thank You

Mamatha B M said:

logs we observed an error that that data is corrupted

This message “The data is corrupted, write default values.“ comes from non-volatile memory read, where the configuration data are stored. This message we expect on any new board where you run stack for first time. It’s displayed just one time on start to write factory configuration data to non-volatile memory.

This should have no impact to execution, because the default data are used for first time. After reset you should not see this message again because configuration data are already present in non-volatile memory.

If you will see that message after next reset than the issue can be really wrong data, because on read we are making some checks to be sure that data are not incorrect.

On the other hand, it would be helpful if you could you also let me know more details on what we are trying to achieve and what is your approach ?

Best Regards

Ashwani

Hi Ashwani,

Thank you for the clarification.

   Can you also respond to the above query regarding the explicit message.

Thank you.

Hi Ashwani,

  Thanks for the response.

We will go through the above procedure and let you know the outcome.

Thank you,

Mamatha B M

Hi Ashwani

Thanks for helping us on explicit message. 

  We have followed the above instruction and were able to get the data on controller.

Thank you.

Mamatha B M

Hi,

    We are running the generic ethernet-ip adapter application we are getting below error's continuously.

pbuf_alloc failed on receiving nrt frame

pbuf_alloc failed on receiving nrt frame

tcp_err_handler: Connection reset. (-14)

Get Method: Class ID 0x80, Instance ID 0x1, Attribute ID 0x308 attrValue : 0x0

RX non-real-time queue overflows: 959
RX non-real-time queue overflows: 969
RX non-real-time queue overflows: 979
RX non-real-time queue overflows: 988
RX non-real-time queue overflows: 998
RX non-real-time queue overflows: 1008
RX non-real-time queue overflows: 1017
RX non-real-time queue overflows: 1027
RX non-real-time queue overflows: 1036
pbuf_alloc failed on receiving nrt frame

RX non-real-time queue overflows: 1066
pbuf_alloc failed on receiving nrt frame

RX non-real-time queue overflows: 1097
pbuf_alloc failed on receiving nrt frame

RX non-real-time queue overflows: 1128
pbuf_alloc failed on receiving nrt frame

RX non-real-time queue overflows: 1160
pbuf_alloc failed on receiving nrt frame

We would appreciate if you could  help us resolving these errors.

Thank You.

Please 

Hi Ashwani,

    These messages are coming when we try to test the explicit messages.

    Hope we get some recommendations for stopping these errors.

  Thank You.

Hi Narasimha Rao,,

you are getting these messages while debugging or just running the example ?

The warning messages are completely normal in case that you are debugging and you are just stop on breakpoint.

But if you are in runtime it can signalize that the packets are transferred too fast and system is not fast enough to process them.

Best Regards

Ashwani

Hi,

    Ashwani Replied

   But if you are in runtime, it can signalize that the packets are transferred too fast and system is not fast enough to process them.

   At what rate AM64x can process the packets so that we can spec the limitation.

   Is there any queuing mechanism to manage the packets if there are multiple packets coming. 

   Thank You.

Narasimha Rao.

you are getting these messages while debugging or just running the example ?

In case of running example we will need more information to be able to analyze:

• board type on which customer is trying to run example

• SDK version which he is using

• UART + Wireshark log

• information about changes if any on side of application

• appimage file with information how to reproduce

Regards

Ashwani