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42 lines
1.9 KiB
42 lines
1.9 KiB
From focum information on NI hardware: https://forums.ni.com/t5/Automotive-and-Embedded-Networks/15765-2-with-NI-products/td-p/1454256
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Timeout Diag Command is the timeout in milliseconds the master
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waits for the response to a diagnostic request message. The default is
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1000 ms.
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Timeout FC (Bs) is the timeout in milliseconds the master waits
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for a Flow Control frame after sending a First Frame or the last
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Consecutive Frame of a block. The default is 250 ms.
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Timeout CF (Cr) is the timeout in milliseconds the master waits
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for a Consecutive Frame in a multiframe response. The default is
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250 ms.
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Receive Block Size (BS) is the number of Consecutive Frames the
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slave sends in one block before waiting for the next Flow Control
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frame. A value of 0 (default) means all Consecutive Frames are sent
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in one run without interruption.
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Wait Time CF (STmin) defines the minimum time for the slave to
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wait between sending two Consecutive Frames of a block. Values
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from 0 to 127 are wait times in milliseconds. Values 241 to 249
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(Hex F1 to F9) mean wait times of 100 μs to 900 μs, respectively.
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All other values are reserved. The default is 5 ms.
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Max Wait Frames (N_WFTmax) is the maximum number of WAIT
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frames the master accepts before terminating the connection. The
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default is 10.
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There are no defined lower limits for these values; you can specify any
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value down to 0. However, as you correctly pointed out, the timing is
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done by Windows, and will be subject to the jitter introduced by the OS
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which can easily be in the order of 10s of milliseconds. It is however
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hard to give more accurate numbers as the actual jitter is dependent on
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the workload of the computer
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J2534 04.04 does not appear to have default adjustable parameters for
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the timeout related fields. For now, these default values shall be used
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in the Panda J2534 implementation.
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