ReAl

At April, 4 (04.04.2012) scmRTOS 4.0 has been released.

Previous version (3.10 + fixes for known bugs) is saved in scmrtos/tags/3.11.

New version is fixed in scmrtos/tags/4.00 and will be developed further in scmrtos/trunk.

Waht’s new in scmRTOS 4.0 over version 3.11:

• Type aliases byte, word, dword replaced by uint8_t, uint16_t, uint32_t from stdint.h. In some cases “fast” types like uint_fast8_t used for optimal compilation. stdint.h header included in scmRTOS.h
• New naming conventions. The user has to rename appropriate functions and type names in his code for using 3.xx-style sources with new OS (see below).
• architecture/compiler/family hierarchy now used for samples’s repository directories and archive names on scmRTOS download page.
• Process restart functionality added.
• Program debug and profiling features added:
  • determining the amount of process’s free stack space,
  • profiling of process execution time,
  • determining the address of service object that the process is waiting for.
• 4-Debug sample is added for new features demonstration.
• Class TKernelAgent and OS extensions mechanism. Class TProfiler as extension example.
• OS class hierarchy changed. All OS services are descendents of the class TService which is descendant of the class TKernelAgent. OS user is able to create it’s own services.
• STM8/IAR port and STM8/IAR/STM8S samples added.
• CortexM3/GCC/LPC17xx samples 1-EventFlag and 4-Debug added.
• Support for devices with more than 128K flash (ATmega256x) added in AVR/GCC and AVR/IAR ports for megaAVR.
• CortexM3/IAR examples removed from OS because a lack of contributors.
• Fujitsu MB91 port no longer supported.
• ARM7/IAR port is currently not supported.

To simplify the scmRTOS 3.xx to 4.xx migration process the special header file is offered: scmRTOS_310_compat.h. The file contains some aliases for old type names and enables compatibility mode in all OS sources. In compatibility mode two types of inline adapter functions defined:

• For user code: from old-style names to new-style names like from Sleep() to sleep() in new OS code.
• For OS code: from new-style names to old-style names like from system_timer_user_hook() to SystemTimerUserHook() in old user’s code.

Because of the adapter functions the user just should change process’s Exec() function name to еxec() and old code will work.

scmRTOS_310_compat.h must be included in project-level configuration file scmRTOS_CONFIG.h. Also, add there two typedef definitions — for system tick counter tick_count_t and for timeouts and sleep time timeout_t.

See 3-Channel sample in AVR/GCC and AVR/IAR ports as example of using scmRTOS v3.xx oriented code with scmRTOS v4.00 in compatibility mode.