IAR Embedded Workbench for AVR

• New linker
  A new AVR-specific linker is introduced with this release. It is based on the previous (generic) XLINK linker, but the new version can automatically select runtime libraries based on the object file attributes. 

• Support for the C18 and C++17 language standards
  The compiler and libraries add support for the language standards known as C18 and C++17. 

• Additional GNU C language extensions
  In extended language mode, the IAR C/C++ Compiler supports a number of new GCC-style operators, attributes, and expressions. See the compiler release notes for details.

• Unicode support
  The Unicode standard for consistent encoding, representation, and handling of text is now supported. This means that you can use Unicode characters (alphabetic, numeric, symbols, emoji, etc) in the source code.

• Editor and IDE enhancements

  • Editor themes - a new way to set up the colors and fonts in the text editor
  • Syntax feedback - instant syntax suggestions while typing
  • Improved parameter hints
  • Window color themes - dark mode
  • Gray out inactive code support

   

• Iarbuild enhancements
  The iarbuild command line build utility now supports:

  • Generating a Ninja build file based on the IAR Embedded Workbench project format
  • Generating a JSON description of the Embedded Workbench project
  • More C-STAT reporting and configuration methods

   

• 64-bit Windows application
  IAR Embedded Workbench now runs as a 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.

   

• C-STAT enhancements

  • MISRA C:2012 Amendment 1
    The static analysis tool C-STAT has extended its coverage of the MISRA C:2012 Coding Standard and now fully supports MISRA C:2012 Amendment 1. This amendment adds 14 additional rules to MISRA C:2012 with a focus on security concerns highlighted by the ISO C Secure Guidelines. Several of these address specific issues pertaining to the use of untrustworthy data, a well-known security vulnerability.

  • Improved performance
    Depending on the project, the analysis can be up to 40% faster and memory consumption reduced by up to 20%, compared to the previous version of C-STAT.

   

• Updated device support
  The device support files have been updated to the most recent version from Microchip.

• Updated user documentation
  The user documentation has been updated to reflect the product changes.

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

Support for new devices

Support for ATtiny1624, ATtiny1626, and ATtiny1627 has been added.

• IDE Project Management and Building Guide
• C-SPY® Debugging Guide
• IAR C/C++ Compiler Reference Guide
• IAR Assembler Reference Guide
• IAR Embedded Workbench IDE Migration Guide v4
• IAR Embedded Workbench IDE Migration Guide v6
• IAR Linker and Library Tools Reference Guide
• IAR Embedded Workbench® MISRA C:1998 Reference Guide
• IAR Embedded Workbench® MISRA C:2004 Reference Guide

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。

C-SPY target system support

• Simulator
• AVR JTAGICE mkII
• AVR JTAGICE3
• AVR® ONE!
• AVR Dragon
• Atmel-ICE
• AVR Crypto Controller ROM-monitor for the Atmel Smart Card Development Board (SCDB) and the Voyager development system (optional add-ons, order separately)
• AVR Studio via compatible output format (full support for Atmel ICE via the Atmel debugger interface)

RTOS support

• OSEK Run Time Interface (ORTI) support included
• Micrium µC/OS-II Kernel Awareness Plugin included

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.