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Diffstat (limited to 'spec/acfg/if/appl-needs-simple-task-console-driver.yml')
| -rw-r--r-- | spec/acfg/if/appl-needs-simple-task-console-driver.yml | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/spec/acfg/if/appl-needs-simple-task-console-driver.yml b/spec/acfg/if/appl-needs-simple-task-console-driver.yml new file mode 100644 index 00000000..8f3f4325 --- /dev/null +++ b/spec/acfg/if/appl-needs-simple-task-console-driver.yml @@ -0,0 +1,46 @@ +SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause +appl-config-option-type: feature-enable +copyrights: +- Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR) +description: | + In case this configuration option is defined, then the Simple Task Console + Driver is initialized during system initialization. +enabled-by: true +index-entries: [] +interface-type: appl-config-option +links: +- role: appl-config-group-member + uid: group-devdrv +name: CONFIGURE_APPLICATION_NEEDS_SIMPLE_TASK_CONSOLE_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 ${/rtems/io/if/getchark:/name}. + + 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/io/if/putc:/name}. 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 + + * ${appl-needs-console-driver:/name}, + + * ${appl-needs-simple-console-driver:/name}, and + + * ``CONFIGURE_APPLICATION_NEEDS_SIMPLE_TASK_CONSOLE_DRIVER`` + + configuration options are mutually exclusive. +text: '' +type: interface |