embOS for Cortex M was developed for and with Atollic TrueStudio for ARM and supports all memory models offered by these compiler. It comes with easy to use make files. Initilization code for different Cortex M starter boards is included. Software development with with JTAG tools like J-Link ARM is possible.

Resources and performance data

Memory usage
Kernel size (ROM)	approx. 1700 bytes
Kernel RAM usage	51 bytes
RAM usage per task control block	36 bytes
RAM usage per resource semaphore	16 bytes
RAM usage per counting semaphore	8 bytes
RAM usage per mailbox	24 bytes
RAM usage per software timer	20 bytes
RAM usage event	0 bytes
Min. stack-size per task (RAM)	72 bytes
Timing
Context switch time	5.4 usec
Interrupt latency time	zero
Kernel CPU usage/TICK	less than .2% of total calculation time at 1000 Interrupts/second (1ms TICK)
Basic time unit (TICK)	typ. 1 ms, min. 20 µs (50 kHz interrupt frequency)
Features
Max. no. of tasks	Unlimited (by available RAM only)
Max. no. of mailboxes	unlimited (by available RAM only)
Max. no. of semaphores (resource/binary/counting)	unlimited (by available RAM only)
Max. no. of software timers	unlimited (by available RAM only)
Max. no. of priorities	255
Stack size idle task (RAM)	0(no memory needed)
Nested interrupts	permitted
Task switches from within ISR	possible

Absolute values given above were measured with embOS release build on an ST SMT32F10 CPU running at 72MHz.

embOSView offers system analysis during runtime

Available Emulators

• J-Link ARM
• ARM

Board support packages

embOS comes with lots of ready to go start projects and support packages for various Cortex M3 CPUs and starterboards.

CPU	Eval board
Fujitsu MB9BF506	Fujitsu SK-FM3-100PMC
NXP LPC1788	Embedded Artists LPC1788-32
ST STM32F103B6 PROTO	IAR STM32-SK
ST STM32F103ZET6	ST STM3210E-EVAL(MB672)
ST STM32F407VG	ST STM32F40G-Eval
Toshiba TMPM369	Toshiba BMSKTOPASM369

 

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Release notes for embOS Version 3.86b for Cortex M and Atollic

1. Tool chain used for build
2. New features
3. Improvements
4. Program corrections
5. Known problems/limitations
6. Release history
7. Miscellaneous

Tool chain used for build

The following tools have been used:

Compiler:  arm-atollic-eabi-gcc V4.6.2 
Assembler: arm-atollic-eabi-as  V2.21.1
Librarian: arm-atollic-eabi-ld  V2.21.1
Workbench: Atollic TrueStudio ARM 3.1.0

New features

Version 3.86b

1. Update to latest embOS generic sources V3.86b.
2. Support for Cortex M4F with floating point unit added.
3. BSPs for ST STM32F103, ST STM32F4 and Embedded Artits LPC1788 added.

Version 3.84c

1. Update to latest embOS generic sources V3.84c.
2. BSPs for Toshiba TMPM369 and Fujitsu MB9BF506 added.

Version 3.84

1. Update to latest embOS generic sources V3.84.
2. Profiling with embOSView via J-Link
   All embOS start projects and the embOS libraries were modified to allow communication with embOSView via J-Link.
   embOSView since version 3.82g allows selection of a communication to a Cortex M3 using J-Link with JTAG or SWD interface.
   The communication to embOSView starts after the call of OS_Start() and can be used in parallel with a debugging session which uses J-Link as debugging probe.
3. Update to Atollic TrueStudio for ARM V2.20.

Version 3.82e

1. Initial version for Cortex M3

Improvements

Version 3.82e

1. NONE, initial version for Cortex M3.

Program corrections

Version 3.84d

1. Queue handling corrected.

Version 3.82e

1. NONE, initial version for Cortex M3.

Known problems/limitations

Version 3.82e

1. NONE.

Release history

Version	Release date	Short explanation
V3.86b	07. May 2012	Update to latest embOS generic sources V3.86b. Support for Cortex M4F with floating point unit added. BSPs for ST STM32F103, ST STM32F4 and Embedded Artits LPC1788 added.
V3.84d	27. Apr 2012	Queue handling corrected.
V3.84c	02. Feb 2012	Update to latest embOS generic sources V3.84c. BSPs for Toshiba TMPM369 and Fujitsu MB9BF506 added.
V3.84	02. Nov 2011	Update to latest embOS generic sources V3.84. embOSView runs via J-Link. Update to Atollic TrueStudio for ARM V2.20.
V3.82e	18. January 2010	Initial version for Cortex M3

Miscellaneous

This document was first released with version 3.82e of the software.
Software released earlier is documented internally. This information is available at request.