IAR Embedded Workbench for Renesas RH850

• Library support for the C++17 language standard
• Additional GNU C language extensions
• Editor and IDE enhancements including Dark Mode
• Iarbuild enhancements
• 64-bit Windows application
• Visual Studio Code support
  The IAR Build and IAR C-SPY Debug extensions available on Microsoft Marketplace enable you to work in Visual Studio Code (with IAR Embedded Workbench installed) to:
• Build IAR Embedded Workbench projects
• Run the C-STAT static analysis tool
• Debug applications using the same range of hardware/debug probes as in IAR Embedded Workbench
• Updated device support
• Updated user documentation

Support for position-independent code and ready-only data (ROPI)

When using position-independent code and ROPI, the compiler in IAR Embedded Workbench for RH850 will generate code that uses PC-relative references for addressing code and read-only data.

Updated device support

The device support files have been updated to the most recent version from Renesas.

Updated user documentation

The C/C++ Development Guide, and IDE Project Management and Building Guide have been updated to reflect the product changes.

• Updated device support
  Support has been added for the RH850/U2A, C1x, D1x, E1x and E2x series of microcontrollers.
• C18 support
  The default Standard C is now C18 (ISO/IEC 9899:2018).
• C++17 support
  The compiler now supports almost all C++17 features. The C++ library supports C++14 with no C++17 additions.
• Extended coverage of CERT C
  The static analysis tool C-STAT has extended its coverage of the SEI CERT C Coding Standard. The SEI CERT C Coding Standard's goal is to provide rules for developing safe, reliable and secure systems in the C programming language, with support for C11 constructs.
• Improved Source Browser
  The following improvements have been made to the Source Browser:
  - The source browser data is generated faster as it is now running as a separate thread.
  - New Source Browser Log window.
  - Status indicator in the status bar.
  - Enhanced feedback in case source browsing data cannot be generated.

• Documentation Comments support in the editor
  The editor can distinguish comments that start with /**, /*!, /// or //! as Documentation Comments. Inside a Documentation Comment, the editor can recognize keywords that begin with \ or @. If the keyword is recognized as a doxygen keyword, the Documentation Comment will appear in tooltips and parameter hints for variables and functions. See IAR Embedded Workbench IDE Project Management and Building Guide for more information.

• IAR Embedded Workbench IDE Project Management and Building Guide
• IAR C/C++ Development Guide
• IAR Assembler Reference Guide
• C-SPY Debugging Guide
• IAR Embedded Workbench MISRA C:2004 Reference Guide
• IAR Embedded Workbench MISRA C:1998 Reference Guide
• C-STAT Static analysis guide

Emulator support

• Renesas E1 emulator
• Renesas E20 emulator
• C-SPY Debugger simulator
• C-SPY Debugger plugin SDK available for 3rd party debuggers

RTOS support

• RTOS-aware debugging with built-in plugins.
• Micrium µC/OS-II
• OSEK Run Time Interface (ORTI)
• Segger embOS
• Express Logic
• FreeRTOS
• CMX

Each RTOS plugin installs a number of new windows in C-SPY, most importantly the task or thread list windows where task-specific breakpoints can be specified and task-specific steps executed. Different inspector windows display the contents of the internal data structures of the RTOS such as timers, queues, semaphores, resources and mailboxes.

IAR C/C++ 编译器提供 C 和 C++ 编程语言的不同方言，以及针对嵌入式编程的不同扩展（请注意，并非所有语言标准都支持所有目标实现）。编译器可以被指示禁用扩展，以严格遵守标准。

支持多种行业标准的调试和映像格式，与大多数流行的调试器和模拟器兼容。其中包括 ELF/DWARF（如适用）。

符合 ISO/ANSI C/C++ 标准

IAR C/C++ 编译器遵守以下 C 语言编程标准的独立实现：

• INCITS/ISO/IEC 9899:2018，即 C18（仅限最新版本）

• 编译器支持所有 C++17 功能。C++ 库支持 C++14，没有补充 C++17（仅限最新版本）

• ISO/IEC 14882:2015，即 C++14

• INCITS/ISO/IEC 9899:2012，即 C11

• ANSI X3.159-1989，即 C89

不同编译器的 ISO/ANSI C/C++ 兼容性水平存在差异。如需了解完整信息，请参考您所选产品中的 IAR C/C++ 编译器用户文档。

IEEE 754 标准

IAR Embedded Workbench 支持 IEEE 754 标准的浮点运算。

MISRA C

MISRA C 是由 MISRA（汽车工业软件可靠性协会）制定的 C 编程语言的软件开发标准。它的目的是促进嵌入式系统中的代码安全、可移植性和可靠性，特别是那些用 ISO C 语言编程的系统。

MISRA C 标准的第一版是《汽车软件中 C 语言的使用指南》，诞生于 1998 年。2004 年该协会发布了第二版指南，其中进行了许多重大修改，包括对规则进行了全面的重新编号。此外，MISRA C:2012 的扩展支持和 MISRA C++:2008 用于识别 C++ 标准中的不安全代码结构也被添加到标准中。

IAR Embedded Workbench 包含一个插件产品 C-STAT，因此您可以检查应用是否符合 MISRA C:2004、MISRA C++:2008 和 MISRA C:2012 定义的规则。

测试验证

我们使用以下商业测试套件来测试我们的工具是否符合标准：

• 适于 ISO/IEC C 标准一致性的 Plum Hall 验证测试套件

• 适于测试 C++ 标准一致性的 Perennial EC++ 验证套件

• Dinkum C++ Proofer 测试我们的库是否符合 C 和 C++ 标准，并根据 C++ 标准测试我们的 STL 实现

除商业套件外，我们还使用一些内部测试套件来测试新功能、执行回归测试、纠正错误等。