Kinetis Software Development Kit中的主题 USB Stack Continuous Interrupt

USB Stack Continuous Interrupt

aniketmarkande — Thu, 08 Jun 2017 14:23:35 GMT

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

Re: USB Stack Continuous Interrupt

vicentegomez — Mon, 12 Jun 2017 20:14:03 GMT

Can you tell us the device that you are using?

regards

Vicente Gomez

Re: USB Stack Continuous Interrupt

aniketmarkande — Wed, 14 Jun 2017 17:47:51 GMT

TWR-K22F120M

Re: USB Stack Continuous Interrupt

jorge_a_vazquez — Mon, 19 Jun 2017 23:26:39 GMT

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