µC/OS-II
is a highly portable, ROMable, scalable, preemptive, real-time,
multitasking kernel (RTOS). µC/OS-11 is written in ANSI
C and contains a small portion of assembly language code to
adapt it to different processor architectures. µC/OS-II
is:
- Low
cost: The source code is available for USD $75, but requires
a one-time fee when used in commercial applications (currently
$2750).
- Small
footprint: uC/OS-II requires about 16KB program memory in
ARM mode with most features enabled and can be scaled down
to less than 6 KB in Thumb mode if needed.
- Robust:
Meets the requirements of safety critical systems and is
certifiable according to DO178B level A
- Documentation:
The internals of uC/OS-II are described in Jean J. Labrosse's
book: MicroC/OS-II, The Real-Time Kernel (ISBN 1-57820-103-9)
Some of
the services provided by uC/OS-II:
- Task
Management
- Time
Management
- Memory
Management of Semaphores
- Event
Flags
- Message
Mailboxes and Queues
Included
with EMUL-ARM
EMUL-ARM comes with BSPs, which include µC/OS-II ports
ready to use with selected evaluation boards - both ARM mode
and Thumb mode. However, the MicroC/OS-II book must be purchased
to get the source. Please note that Nohau® supplies the latest
version of µC/OS-II (currently 2.76) and also made minor
modifications. Sites like Amazon.com typically include older
versions of the operating system.
Kernel
Awareness for µC/OS-II
EMUL-ARM has built-in Kernel Awareness for µC/OS-II,
which allows viewing task status, stack usage, etc. Other
viewable items include semaphores (which tasks are waiting
for a semaphore), and memory allocation status.
Ports available for IAR / HI-TECH compilers and following
targets:
- Atmel
E1340, EB40A and EB55 with associated targets
- Philips
LPC2000 series
- Oki
ML764K series
- Oki
ML765K series
- More
soon - ask
|
