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Implement some details of USBTMC specification - helps to recover from read timeout #50

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wants to merge 3 commits into from
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Implement some details of USBTMC specification - helps to recover from read timeout #50

wants to merge 3 commits into from

Commits on Jan 9, 2019

  1. Read Bulk-IN data during abort_bulk_in sequence 

    The USBTMC specification requires that pending Bulk-IN data
are read during the abort_bulk_in sequence.

Without this change, several tested USBTMC devices become fully
unresponsive after a read timeout. With this change, the device
responds correctly to subsequent commands after a timeout.
    Joris van Rantwijk committed Jan 9, 2019
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  2. Clear Bulk-OUT endpoint after abort_bulk_out 

    The USBTMC specification requires that the Bulk-OUT endpoint is
stalled by the device during abort_bulk_out, then explicitly
cleared by the host.
    Joris van Rantwijk committed Jan 9, 2019
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  3. Ignore EOM flag when device sends partial data 

    The USBTMC specificiation requires that the host ignore the EOM flag
unless the device sends a complete data transfer.
    Joris van Rantwijk committed Jan 9, 2019
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