October 2002
Intermediate to advanced
430 pages
14h 57m
English
Content preview from Embedded Systems Design, 2nd Edition
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220 Embedded systems design
With the LUN, the task can create another parameter block,
containing the data, and ask the I/O services to write the data to
the file. This may require the I/O services to make system calls of
its own. It may need to call the file services for more data or to pass
further information on. The data is then supplied to the device
driver which actually executes the instructions to physically write
the data to the disk. It is generally at this level that the logical
nature of the I/O request is translated into the physical character-
istics associated with the hardware. This translation should lie in
the domain of the device driver ...
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