RTEMS C User's Guide
This section defines the configuration parameters related
to the automatic generation of a Device Driver Table. As
rtems/confdefs.h only is aware of a small set of
standard device drivers, the generated Device Driver
Table is suitable for simple applications with no
custom device drivers.
CONFIGURE_HAS_OWN_DEVICE_DRIVER_TABLE is defined if
the application wishes to provide their own Device Driver Table.
The table generated is an array of rtems_driver_address_table
entries named Device_drivers. By default, this is not
defined indicating the rtems/confdefs.h is providing the
device driver table.
CONFIGURE_MAXIMUM_DRIVERS is defined
as the number of device drivers per node. By default, this is
set to 10.
CONFIGURE_MAXIMUM_DEVICES is defined
to the number of individual devices that may be registered
in the system. By default, this is set to 20.
CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
is defined
if the application wishes to include the Console Device Driver.
This device driver is responsible for providing standard input
and output using "/dev/console". By default, this is not
defined.
CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
is defined
if the application wishes to include the Clock Device Driver.
This device driver is responsible for providing a regular
interrupt which invokes the rtems_clock_tick directive.
By default, this is not defined.
CONFIGURE_APPLICATION_NEEDS_TIMER_DRIVER
is defined if the application wishes to include the Timer Driver.
This device driver is used to benchmark execution times
by the RTEMS Timing Test Suites. By default, this is not
defined.
CONFIGURE_APPLICATION_DOES_NOT_NEED_CLOCK_DRIVER is defined
when the application does NOT want the Clock Device Driver
and is NOT using the Timer Driver. The inclusion or
exclusion of the Clock Driver must be explicit in typical
user applications. This is intended to prevent the common
user error of using the Hello World example as the baseline
for an application and leaving out a clock tick source.
CONFIGURE_APPLICATION_NEEDS_RTC_DRIVER
is defined if the application wishes to include the Real-Time Clock Driver.
By default, this is not defined.
CONFIGURE_APPLICATION_NEEDS_WATCHDOG_DRIVER
is defined if the application wishes to include the Watchdog Driver.
By default, this is not defined.
CONFIGURE_APPLICATION_NEEDS_STUB_DRIVER
is defined if the application wishes to include the Stub Device Driver.
This device driver simply provides entry points that return
successful and is primarily a test fixture.
By default, this is not defined.
CONFIGURE_BSP_PREREQUISITE_DRIVERS is defined if the
BSP has device drivers it needs to include in the Device Driver
Table. This should be defined to the set of device driver entries that
will be placed in the table at the FRONT of the Device Driver Table
and initialized before any other drivers INCLUDING any application
prerequisite drivers. By default,this is not defined.
CONFIGURE_APPLICATION_PREREQUISITE_DRIVERS is defined if the
application has device drivers it needs to include in the Device Driver
Table. This should be defined to the set of device driver entries that
will be placed in the table at the FRONT of the Device Driver Table
and initialized before any other drivers EXCEPT any BSP prerequisite
drivers. By default,this is not defined.
CONFIGURE_APPLICATION_EXTRA_DRIVERS is defined if the
application has device drivers it needs to include in the Device Driver
Table. This should be defined to the set of device driver entries that
will be placed in the table at the END of the Device Driver Table.
By default,this is not defined.
RTEMS C User's Guide
Copyright © 1988-2008 OAR Corporation