General USB question

christian_greni — Wed, 10 Jan 2018 17:00:48 GMT

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

Re: General USB question

soledad — Thu, 11 Jan 2018 20:25:18 GMT

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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LPC MicrocontrollersのトピックGeneral USB question

General USB question

Re: General USB question