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CONFIGURE_*_SIMPLE_TASK_CONSOLE_DRIVER

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Update #3320.
This commit is contained in:
Sebastian Huber
2018-03-06 07:38:52 +01:00
parent d078405b9a
commit f6c6c8b274
1 changed files with 84 additions and 13 deletions
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97
c-user/configuring_a_system.rst
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@@ -3854,15 +3854,22 @@ DESCRIPTION:
application wishes to include the Console Device Driver. application wishes to include the Console Device Driver.
NOTES: NOTES:
This device driver is responsible for providing standard input and output This device driver is responsible for providing the :file:`/dev/console`
using */dev/console*. device file. This device is used to initialize the standard input, output,
and error file descriptors.
BSPs should be constructed in a manner that allows ``printk()`` to work BSPs should be constructed in a manner that allows ``printk()`` to work
properly without the need for the console driver to be configured. properly without the need for the console driver to be configured.
The ``CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER`` configuration option is The
mutually exclusive with the
``CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER`` configuration option. * ``CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER``,
* ``CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER``, and
* ``CONFIGURE_APPLICATION_NEEDS_SIMPLE_TASK_CONSOLE_DRIVER``
configuration options are mutually exclusive.
.. index:: CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER .. index:: CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER
@@ -3888,16 +3895,80 @@ DESCRIPTION:
application wishes to include the Simple Console Device Driver. application wishes to include the Simple Console Device Driver.
NOTES: NOTES:
This device driver is responsible for providing standard input and output This device driver is responsible for providing the :file:`/dev/console`
using */dev/console*. device file. This device is used to initialize the standard input, output,
and error file descriptors.
This device driver writes via ``rtems_putc()`` and reads via This device driver reads via ``getchark()``.
``getchark()``. The Termios framework is not used. There is no support to
change device settings, e.g. baud, stop bits, parity, etc.
The ``CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER`` configuration This device driver writes via ``rtems_putc()``.
option is mutually exclusive with the
``CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER`` configuration option. The Termios framework is not used. There is no support to change device
settings, e.g. baud, stop bits, parity, etc.
The
* ``CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER``,
* ``CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER``, and
* ``CONFIGURE_APPLICATION_NEEDS_SIMPLE_TASK_CONSOLE_DRIVER``
configuration options are mutually exclusive.
.. index:: CONFIGURE_APPLICATION_NEEDS_SIMPLE_TASK_CONSOLE_DRIVER
.. _CONFIGURE_APPLICATION_NEEDS_SIMPLE_TASK_CONSOLE_DRIVER:
CONFIGURE_APPLICATION_NEEDS_SIMPLE_TASK_CONSOLE_DRIVER
------------------------------------------------------
CONSTANT:
``CONFIGURE_APPLICATION_NEEDS_SIMPLE_TASK_CONSOLE_DRIVER``
DATA TYPE:
Boolean feature macro.
RANGE:
Defined or undefined.
DEFAULT VALUE:
This is not defined by default.
DESCRIPTION:
``CONFIGURE_APPLICATION_NEEDS_SIMPLE_TASK_CONSOLE_DRIVER`` is defined if
the application wishes to include the Simple Task Console Device Driver.
NOTES:
This device driver is responsible for providing the :file:`/dev/console`
device file. This device is used to initialize the standard input, output,
and error file descriptors.
This device driver reads via ``getchark()``.
This device driver writes into a write buffer. The count of characters
written into the write buffer is returned. It might be less than the
requested count, in case the write buffer is full. The write is
non-blocking and may be called from interrupt context. A dedicated task
reads from the write buffer and outputs the characters via
``rtems_putc()``. This task runs with the least important priority. The
write buffer size is 2047 characters and it is not configurable.
Use ``fsync(STDOUT_FILENO)`` or ``fdatasync(STDOUT_FILENO)`` to drain the
write buffer.
The Termios framework is not used. There is no support to change device
settings, e.g. baud, stop bits, parity, etc.
The
* ``CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER``,
* ``CONFIGURE_APPLICATION_NEEDS_SIMPLE_CONSOLE_DRIVER``, and
* ``CONFIGURE_APPLICATION_NEEDS_SIMPLE_TASK_CONSOLE_DRIVER``
configuration options are mutually exclusive.
.. index:: CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER .. index:: CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER