TUSB9261: Question about the source code of the firmware

Chongyu Long

Part Number: TUSB9261
Other Parts Discussed in Thread: TUSB9260

Hello, I have now obtained the source code of TUSB9261 firmware.

In the tusb9260.h file, the DISABLE_WRAP_WINDOW variable is used to control to use store-and-forward or Wrap Window memory function".

I've learned that in store-and-forward mode, the array wrap_window_memory_placeholder holds the data transferred by the chip, and we can manipulate it in that array. For example, let each element in the array increment by 1. However, this mode greatly reduces the overall data transfer speed.

Now, I don't quite understand how the Wrap Window memory function works, and I haven't been able to find any reference documentation.

But I know that this mode has a fast transfer rate, and I like this feature.

If I still need to do something with the transferred data, such as increment each element in the array by 1. Can I do this in Wrap Window memory function mode? What can I do if I can?

Thank you in advance for any help you might be able to provide.

Sincerely.

over 1 year ago

0 Ryan Kitto over 1 year ago

TI__Mastermind 39975 points

Hi Chongyu,

I can look internally for more information, unfortunately, I am unaware of the exact functionality and workings of this function. The TUSB9261 currently is limited in terms of software support, which is why we provide the FW and FW source code, so that customers can look at the code and modify it to their needs.

I will reach out, and see if I can find more information,

Thanks,

Ryan

0 Chongyu Long over 1 year ago in reply to Ryan Kitto

Prodigy 160 points

Thanks！

0 Chongyu Long over 1 year ago in reply to Ryan Kitto

Prodigy 160 points

As a side note, I think one of the key points above is to figure out how the mww.h and mww.c files in the source code work. That is, figure out what the Memory Wrap Window is. Do you have a reference for Memory Wrap Window?

0 Ryan Kitto over 1 year ago in reply to Chongyu Long

TI__Mastermind 39975 points

Hi Chongyu,

I've reached out to the person who made this firmware, as it has been quite a while since this firmware was released. I asked them if they had any references for explanation or could provide one, and will let you know what response I get.

Thanks,

Ryan

0 Ryan Kitto over 1 year ago in reply to Ryan Kitto

TI__Mastermind 39975 points

Hi Chongyu,

The explanation that I received back was that the Memory Wrap Window function essentially reduces the amount of commands needed between USB and SATA, reducing the overhead head and in general boosting how fast the device functions.

I will see if I can also find any documents or any other in-depth explanations.

Thanks,

Ryan

0 Chongyu Long over 1 year ago in reply to Ryan Kitto

Prodigy 160 points

Thanks！ It would be nice to have more in-depth explanations.

0 Ryan Kitto over 1 year ago in reply to Chongyu Long

TI__Mastermind 39975 points

Hi Chongyu.

Still looking on my side, I will let you know if I find anything.

Thanks,

Ryan

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TUSB9261: Question about the source code of the firmware