20 lines
1.1 KiB
Plaintext
20 lines
1.1 KiB
Plaintext
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-------------------------------------------------------------------------------
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* INFORMATION: *
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-------------------------------------------------------------------------------
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README file for "USBD" USB host controller driver.
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created march-june 2014, JPEmbedded (info@jpembedded.eu)
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-------------------------------------------------------------------------------
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* KNOWN LIMITATIONS: *
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-------------------------------------------------------------------------------
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- Only first configuration can be selected for attached device
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- Only one device can be handled at a time, no hub functionality
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- Driver assumes that there is no preemption for DDEKit threading
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- URBs are enqueued in DDEKit but not in USBD itself
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- DDEKit way of handling interface numbers is not explicitly defined, bitmask
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formatting for it, is therefore hardcoded into USBD
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- Waiting for USB0 clock to leave IDLEST.Disable state, by nanosleep, was
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removed, as this should be implemented for all clocks in clkconf_set
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- Control transfers can only be performed with EP0
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