nuttx/Documentation/components/drivers/special/index.rst

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==========================
Specialized Device Drivers
==========================
All device drivers that are accessible to application logic are
either: (1) Character device drivers that can be accessed via the
standard driver operations (``open()``, ``close()``, ``read()``,
``write()``, etc.), or (2) block drivers that can be accessing
only as part of mounting a file system or other special use cases
as described in the preceding paragraph.
In addition to this, there are also specialized "drivers" that can
be used only within the OS logic itself and are not accessible to
application logic. These specialized drivers are discussed in the
following section.
.. note::
While special drivers are *internal*, in some cases there are also
character/block drivers that sit on top of these special drivers
and thus expose them to applications.
.. toctree::
:caption: Supported Drivers
audio.rst
clk.rst
devicetree.rst
dma.rst
framebuffer.rst
i2c.rst
ioexpander.rst
lcd.rst
mtd.rst
regmap.rst
reset.rst
rptun.rst
rwbuffer.rst
sensors.rst
segger.rst
spi.rst
syslog.rst
sdio.rst
usbdev.rst
usbhost.rst
usbmisc.rst
usbmonitor.rst
usrsock.rst
mmcsd.rst
net/index.rst
pipes.rst
power/index.rst
virtio.rst
video.rst
wireless.rst