0
niccodemi

orangepipc limit usb speed

Recommended Posts

Hi,

 

I would like to know if it is possible to limit USB speed to 1.1 standard on orangepipc and how to do it? I know it is doable on raspbian but I couldn't find info about doing this on armbian 

Share this post


Link to post
Share on other sites
Want Armbian t-shirt or a cup?

The only good reason in my opinion is for usb protocol reverse engineering with a low cost usb packet analyser (usb 12mbit).

Share this post


Link to post
Share on other sites

@chwe to increase reliability of certain usb adapters.

 

On raspbian this is accomplished fairly easy just by adding parameter  "dwc_otg.speed=1" to file /boot/cmdline.txt

 

Is there really no such option in armbian?

Share this post


Link to post
Share on other sites
7 hours ago, niccodemi said:

Is there really no such option in armbian?

No, since

  • the main reason is that this isn't related to Armbian but to the kernel you use. With mainline kernel and H3 boards most probably disabling the respective ehci1 node while leaving ohci1 as "okay" might work. With legacy kernel... no idea and will never check
  • Providing this as configurable option (eg. an overlay) would be weird, just throw away broken USB peripherals
15 hours ago, niccodemi said:

I know it is doable on raspbian

 

Wrong. It's doable this way on Raspberry Pis regardless of the distribution used with RPi standard kernel. It's not related to Raspbian at all (and therefore also won't work on Chinese boards that are advertised being capable to 'run Raspberry Pi image' -- I have not checked whether Xunlong provides a Raspbian image for OPi PC but even if they do it won't work there as with RPi kernel)

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
0