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c-user: Fix use of getchark() and rtems_putc()

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Sebastian Huber 2020-09-28 09:11:03 +02:00
parent 2fb86e27ce
commit 647bfdd728
1 changed files with 4 additions and 4 deletions
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c-user/config/device-driver.rst
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@ -318,9 +318,9 @@ NOTES:
device file. This device is used to initialize the standard input, output, device file. This device is used to initialize the standard input, output,
and error file descriptors. and error file descriptors.
This device driver reads via :c:func:`rtems_putc`. This device driver reads via :c:func:`getchark`.
This device driver writes via :c:func:`getchark`. This device driver writes via :c:func:`rtems_putc`.
The Termios framework is not used. There is no support to change device The Termios framework is not used. There is no support to change device
settings, e.g. baud, stop bits, parity, etc. settings, e.g. baud, stop bits, parity, etc.
@ -361,14 +361,14 @@ NOTES:
device file. This device is used to initialize the standard input, output, device file. This device is used to initialize the standard input, output,
and error file descriptors. and error file descriptors.
This device driver reads via :c:func:`rtems_putc`. This device driver reads via :c:func:`getchark`.
This device driver writes into a write buffer. The count of characters 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 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 requested count, in case the write buffer is full. The write is
non-blocking and may be called from interrupt context. A dedicated task non-blocking and may be called from interrupt context. A dedicated task
reads from the write buffer and outputs the characters via reads from the write buffer and outputs the characters via
:c:func:`getchark`. This task runs with the least important priority. :c:func:`rtems_putc`. This task runs with the least important priority.
The write buffer size is 2047 characters and it is not configurable. The write buffer size is 2047 characters and it is not configurable.
Use ``fsync( STDOUT_FILENO )`` or ``fdatasync( STDOUT_FILENO )`` to drain the Use ``fsync( STDOUT_FILENO )`` or ``fdatasync( STDOUT_FILENO )`` to drain the