USB Stack Continuous Interrupt

[aniketmarkande]

Hi,

I am using KSDK 1.3 USB host(hub) Stack for MSD. Whenever hub is connected, it gives interrupt continuously, causing all time spent in ISR only.

Is this correct behavior? or is there any way to have interrupt only when status on the USB is changed (like USB stick is attached or detached)?

Help needed, URGENT.

Thank you :smileyhappy:

Regards,

Aniket

[jorge_a_vazquez]

Hi Aniket Markande

This is an expected behavior. When you are going to use a hub in Host mode, host need to keep checking all the devices to locate any change in the status, so, in order to do this, it will continuously trigger interrupts to check all connections and detect any change. Unfortunately there is no way to change a USB Host to have Asynchronous interrupts when you are using a Hub.

Hope it helps, sorry for the inconveniences that this may cause you.

Best Regards

Jorge Alcala

[vicentegomez]

Can you tell us the device that you are using?

regards

Vicente Gomez

[aniketmarkande]

TWR-K22F120M