AM62X: Can M4F access Ethernet device (CPSW)?

Hello 

We do not expect customers to be able to use CPSW from M4. This is not a use-case we support in hardware (as you noted based on interrupt connectivity) and there is no support for m4 based RTOS drivers on M4 for CPSW. For this device family we expect customers to use CPSW from A53 

Hope this helps. Let us know if you have more questions 

Regards

Mukul 

If we can write the M4's CPSW RTOS driver by ourselves, is it possible let M4 use CPSW?

Hello Ted Juan, 

Thank you for checking.

As observed above, CPSW does not seem to have access to M4F.

I am reassigning thread.

Regards,

Sreenivasa

Hi Ted,

What is the performance number (speed, latency) you are expecting using M4 <=> CPSW ?

Can you please share some details about use case for my understanding to help you better.

Means why did you choose M4 is the only option to communicate with CPSW  ?

What exactly you are trying to achieve ?

why you cannot go with R5 <=> ICSS or R5 <=> CPSW or A53 <=> ICSS or A53 <=> CPSW ?

Best Regards

Ashwani

Hi Ashwani,

Thank you for your reply.

Here is the link to our product datasheet: https://dl.weintek.com/public/cMT/eng/Datasheet/cMT_CODESYS_Datasheet_ENG_20230504.pdf

It appears that even after resolving the CPSW ISR connection problem, M4/R5 still have performance issues. The internal memory (SRAM) of M4/R5 is too small for our requirements, and accessing external DDR from M4/R5 takes longer than expected.

We will still use one A53 core to run the RTOS and achieve our goal. However, it is unfortunate that we cannot use M4 in this product.

Best regards,
Ted