AM2432: CAN-FD Example Code Issue in AM2432

Hi Nilesh,

For external communication, you would also need to enable the transceiver, could you confirm if this was done. 

You can check mcan_external_loopback_interrupt as an example where we enable the transceiver using mcan_enableTransceiver in the Rx application: https://github.com/TexasInstruments/mcupsdk-core/blob/next/examples/drivers/mcan/mcan_external_loopback_interrupt/mcan_rx_only_interrupt.c#L144 

This function is defined in mcan_transceiver.c file: https://github.com/TexasInstruments/mcupsdk-core/blob/next/examples/drivers/mcan/mcan_external_loopback_interrupt/am243x-evm/mcan_transceiver.c#L67

Best Regards,

Meet.

Hello,

External Transceiver is not connected yet. We are just monitoring on the CAN TTL Signals on MCU CAN TX & RX. (Directly from MCU)

We have also tested with the transceiver but did not get success. Because of that reason, we are testing without the external transceiver.

Can we test it without transceiver?

Nilesh Parmar said:

Can we test it without transceiver?

Yes, it is required if you want to test it for external communication.

Nilesh Parmar said:

External Transceiver is not connected yet

If you are using a am243x-evm then you don't need to connect an external transceiver, the evm has an on-board transceiver.

I just want to test it with a logic analyser. 

So, I connected my logic analyser with MCAN TX and RX Terminal of Microcontroller.

Will it work?

Hi Nilesh,

Nilesh Parmar said:

I just want to test it with a logic analyser. 

So, I connected my logic analyser with MCAN TX and RX Terminal of Microcontroller.

No, you won't be able to test the Signals on Tx and Rx lines without using a transceiver. 

Thanks for Update.

I am using the custom board which has TCAN Tranceiver. However, it is not working with it.

Moreover, I have tried to build the example which you have shared but it fails to build and showing the memory linking error.

Can I modify the loopback example from SDK and use the same code?

Could you check this FAQ:  [FAQ] SK-AM62X/SK-AM62A-LP: Testing MCAN External Loopback example using external transceiver TCAN1042D and see if you are able to make it work using the steps mentioned here.

Thanks for sharing.

I have gone through this article.

Meet Thakar said:

You can check mcan_external_loopback_interrupt as an example where we enable the transceiver using mcan_enableTransceiver in the Rx application: https://github.com/TexasInstruments/mcupsdk-core/blob/next/examples/drivers/mcan/mcan_external_loopback_interrupt/mcan_rx_only_interrupt.c#L144 

I'm getting error during building the external loopback interrupt example.

If you have AM2432 EVM then you validate the functionality at your end?

I am attaching the modified firmware with you. Please review and test at your end and let us know that what changes are required.

canfd_loopback_polling_am243x-evm_r5fss0-0_nortos_ti-arm-clang.zip

Hi Nilesh,

Please allow me some time to check the application shared by you and test it at my end.

Best Regards,

Meet.

Hi Meet,

Please update me once you validate it at your end.

Kindly make it as soon as possible because it becomes the speed breaker for our development.

Hi Nilesh,

Apologies for the delay, I am working on this, please allow me till end of this week to get to some results.

Best Regards,

Meet.

Hi Meet,

Ok.

Hi Meet, 

Kindly update on the posted query as we have to resolve the issue as soon as possible.

Hi Meet, 

Is there any update?

Hi Nilesh,

The concerned expert is out of office. Please expect a delay in response.

Thanking you

Yashraj

Hi

Please inform me the exact time when I will get the response.

I have been waiting for a long time. He told me that I will get the response by the end of last week. However, I have not get any response yet.

I understand that the response has been pending since last week. Please expect Meet to reply as soon as he is back.

Hi,

Is there any update on our query.

I have been waiting for the long time but have not get any update.

I already mentioned that we have an urgent requirement for the issue resolution. 

Hi Meet, 

Kindly update on the same.

It's a bed experience from the support team. I have been waiting for more than 15days, but still my issue is not resolved, and nobody is providing the response. Because of this reason, we are not able to move forward with the development.

Hi Nilesh,

Nilesh Parmar said:

I'm getting error during building the external loopback interrupt example.

For the build related issue on MCAN example, it looks like the linker.cmd is missing few memory sections.

Please use the below example.syscfg file in the example and update the results.

file - example.syscfg

For the CAN related issue, Meet is working and will provide response by this week.

Regards,

Tushar

Hi, Is there any update on the provided CAN Firmware?

Hi Nilesh,

I am trying to enable the external transmission by modifying the CANFD internal loopback example, but facing some issue while doing the same. I will let you know once there is any progress on this.

Best Regards,

Meet.

Hi Meet,

Thanks for Update.

I have tested the shared firmware on our board. It is working as expected. 

However, the concern is that why i require to comment rx object constructor and reading APIs. What's the reason behind it?

In addition to this, what shall I do to read data on CAN if I disable the rx objects / Read APIs in the code.

Kindly clarify on the same.