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STM32F217 - USB FS host mode hub problem

Question asked by flor.greg on Jul 3, 2013
Latest reply on May 18, 2016 by alecs
I'm using STM32F217IGH and I'm stuck on a problem with USB FS in host mode.

When I'm connecting Low Speed devices through Full Speed hub,  during enumeration, the core generates a port disabled interrupt. The reference manual suggests a port babble error, but i don't know why this is happening. The problem does not ocuur with Full Speed devices.

My USB analyzer shows that the last packet send by a host is always PREamble packet (i've attached some screens from analyzer).