General USB question

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General USB question

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Contributor I

Hello,

I have a question that I need to answer.  I have a USB device which I installed a mass storage class.  When I connect the device on the computer, it detects the drive and I can access to driver correctly.  I don't know how to handle the USB interface when the device is busy to do an other critical task.  For example, I don't want to copy a file in the drive if the device is presently busy in a critical task.   Actually,  I disabled the USB interrupts in the lpc microcontroller during the critical task... but after 1 or 2 minutes, the computer will not recognize the drive and I need to do unplug/replug the usb device to continue to work on the PC.  So It's not a good practice to disable USB interrupts... 

Thanks

Christian

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NXP Employee
NXP Employee

Hi,

Maybe you could try, without removing the interruptions, assigning higher priority to your critical process and a lower priority to USB.

Which device and USB Stack are you using?


Have a great day,
Sol

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