scmRTOS有没人用过？
scmRTOS有没人用过？好像很不错的样子。
http://scmrtos.sourceforge.net/
scmRTOS is a free tiny preemptive Real-Time Operating System intended for use with Single-Chip Microcontrollers.
scmRTOS is capable to run on small uCs with as little amount of RAM as 512 bytes. The RTOS is written on C++. All source code is available. Five target platforms are supported for now:
MSP430 (Texas Instruments);
AVR (Atmel);
Blackfin (Analog Devices);
ARM7;
FR (Fujitsu).
Features:
Preemptive multitasking.
Up to 31 user processes (tasks).
Fast interprocess program control flow transfer:
MSP430: 45-50 us @5MHz.
AVR: 38-42 us @8MHz.
Blackfin: 1.5 us @200 MHz.
ARM7: 5us @50 MHz (ARM mode), 8 us @50 MHz (Thumb mode).
FR: 10 us @32MHz.
Low Resource Requirements:
Code: from about 1 kilobyte (depend on application and target platform).
Kernel Data: 8 + 2*Process Count.
Process Data: 5 bytes.
Supports separate return stack (required for IAR EW AVR).
Two methods of program control flow passing:
Direct context switcher call.
Software Interrupt context switch.
Interprocess communication:
Fast Event Flags (binary semaphores).
Mutual Exclusion Semaphores (Mutexes).
Byte-wide Channels (queues of "raw" data).
Arbitrary-type Channels (queues of arbitrary-type objects).
Messages.
Optional software switch on separate ISR stack on some platforms.
Support of various target hardware features such as hardware shifters etc., for more efficiency.
See User's Manual and other documentation for more details. 没用过，看看去:-) 我倒，帮助文件是俄文的，我只会讲三个俄文单词：我，你还有铅笔.
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