Tài liệu Linux Device Drivers-Chapter 10 :Judicious Use of Data Types doc
Tài liệu Linux Device Drivers-Chapter 10 :Judicious Use of Data Types doc
... kernel offers the following data types to use whenever you need to
know the size of your data. All the types are declared in <asm /types. h>,
which in turn is included by < ;linux/ types. h>: ... Chapter 10 :Judicious Use of Data Types
Before we go on to more advanced topics, we need to stop for a quick note
on portability issues. Modern versions of...
Tài liệu Linux Device Drivers-Chapter 6 : Flow of Time pptx
... the value of HZ,
which is an architecture-dependent value defined in < ;linux/ param.h>.
Current Linux versions define HZ to be 100 for most platforms, but some
platforms use 102 4, and ... delays of an integer number of microseconds
and milliseconds. The former should be used to wait for no longer
than one millisecond; the latter should be used with extreme care
becaus...
Tài liệu Linux Device Drivers-Chapter 15 :Overview of Peripheral Buses pdf
... true, this function is
used to scan the list of installed devices looking for a device featuring
a specific signature. The from argument is used to get hold of
multiple devices with the same ... sample code not meant to be of
real use.
Devices appear in /proc/pcidata in the same order used by
/proc/bus/pci/devices (but in the opposite order from the one used by
/proc/pci in ve...
Tài liệu Microsoft PowerPoint - Day 3 Afternoon - Use of charts- V doc
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 10 pptx
... cycle of Daphnia
6.1.2. Nutritional value of Daphnia
6.1.3. Feeding and nutrition of Daphnia
6.1.4. Mass culture of Daphnia
6.1.5. Production and use of resting eggs
6.1.6. Use of Moina ... the order of 20 to 100 animals per litre.
Normally, optimal algal densities for Daphnia culture are about 10
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Tài liệu Linux Device Drivers-Chapter 1 :An Introduction to Device Drivers ppt
... Introduction to Device Drivers
As the popularity of the Linux system continues to grow, the interest in
writing Linux device drivers steadily increases. Most of Linux is
independent of the hardware ... hardware " ;device. " The device is a single
jumper wire that plugs into the parallel port, so we hope this is not a
problem.
Chapter 10, "Judicious Use...
Tài liệu Linux Device Drivers-Chapter 2 : Building and Running Modules pptx
... and earlier
versions of the kernel is in the data types used for the start and len
arguments. Whereas new kernels always use unsigned long, older
kernels used shorter types. This change has ... memory pages, because a user-
space program depends on a lot of library code. mlock, too, is limited
to privileged users.
The most important devices can't be handled in user spac...
Tài liệu Linux Device Drivers-Chapter 3: Char Drivers docx
... of behavior is interesting to look
at anyway, because some devices require types of management like
the ones shown in these scull variations as part of their mechanism.
Each of the scull devices ... of scull
The first step of driver writing is defining the capabilities (the mechanism)
the driver will offer to user programs. Since our " ;device& quot; is part of the...
Tài liệu Linux Device Drivers-Chapter 4 : Debugging Techniques pptx
... number of bytes of data actually placed in
the page buffer, just like the read implementation does for other files.
Other output values are *eof and *start. eof is a simple flag, but the
use of ... with the original implementation of user extensions to the
/proc filesystem was use of a single memory page for data transfer. This
limited the total size of a user file to...
Tài liệu Linux Device Drivers-Chapter 5 : Enhanced Char Driver Operations pptx
...
copies of the device depending on the process opening it.
Clearly this is possible only if the device is not bound to a hardware object;
scull is an example of such a "software'' device. ... internals of /dev/ttyuse
a similar technique in order to give its process a different "view'' of what the
/dev entry point represents. When copies of the...