Endpoint status of EZ-USB (AN21xx/FX/FX1/FX2/FX2LP)
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Dec 19, 2008
12:00 AM
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Dec 19, 2008
12:00 AM
Question: How do I find the status of an endpoint of EZ-USB (AN21xx/FX/FX1/FX2/FX2LP) at a given instance of time? What will be status of the endpoint after the device comes out of suspend?
Answer:
The standard endpoint request Get Status can be used to find whether the endpoint has stalled. The device responds with 2 bytes and the least significant bit contains the status of the endpoint (1 = Stalled). When the device wakes up from suspend the endpoint will retain the status it had before the device went to suspend.
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- usb controllers
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