IAR Embedded Workbench for Renesas M16C and R8C

The complete development toolchain IAR Embedded Workbench for Renesas M16C/R8C provides one toolbox in one view, giving you one uninterrupted workflow.

01

User-friendly IDE

Integrated development environment with project management tools and editor. Included is automatic checking of MISRA C rules (MISRA-C:2004), configuration files for all M16C/1X–3X, 5X–6X and R8C series of CPU cores, linker and library tools as well as example projects and code templates.

02

Powerful build tools

The IAR C/C++ Compiler is a highly optimizing C and C++ compiler for M16C and R8C. Included is also run-time libraries and a relocating M16C assembler.

03

Comprehensive debugger

The C-SPY Debugger is a comprehensive debugger providing support for RTOS-aware debugging on hardware and extensive HW debugger support for various Renesas emulators.

Latest releases

We are constantly updating and refining our tools with new features, new device support and extended capabilities.

Version 3.71

Parallel build

IAR Embedded Workbench can now build projects using multiple parallel processes. This can improve build performance significantly on multi-core or multiple processor computers. 

C-SPY debugger improvements

  • There is now a search box in the C-SPY Register window for finding a specific register.
  • It is now possible to sort the entries in the C-SPY Statics window by clicking on the respective column header.
  • If a selection is made in the C-SPY Memory window, then the Find and Replace context menu commands now operate just on this selection.
  • The new C-SPY macro __MessageBoxYesNo displays a Yes/Cancel dialog box and returns the user input. Typically, this can be useful for creating macros that require user interaction.

Building all configurations with iarbuild

By specifying a wildcard character (*) as the configuration name, it is now possible to clean/build/make all configurations defined in the project file by calling iarbuild.exe only once.

Read complete release notes

What type of license do you need?

Our tools are available in a flexible license model to suit your company needs. Together with our support and update agreements, you get the support you need in multiple time zones and multiple languages. Send a request for quote or contact sales to get started.

Read more about Licenses

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User guides and documentation

Hardware debugging and RTOS support

Hardware debugging support

  • Renesas E1/E20 emulator
  • Renesas E8a emulator
  • Renesas E100 emulator

RTOS support

  • Support for the OSEK ORTI protocol
  • Segger embOS plugin
  • Micrium µC/OS-II plugin

Languages and standards

The IAR C/C++ compilers offer different dialects of the C and C++ programming languages, as well as different extensions specific for embedded programming (please note that not all language standards are supported for all target implementations). The compiler can be instructed to disable extensions for strict conformance to the standards. 

A wide range of industry-standard debug and image formats compatible with most popular debuggers and emulators are supported. This includes ELF/DWARF where applicable.

ISO/ANSI C/C++ Compliance

The IAR C/C++ compilers adhere to a freestanding implementation of the following C programming language standards:

  • INCITS/ISO/IEC 9899:2018, known as C18 (Latest version only).
  • The compiler supports all C++17 features. The C++ library supports C++14 with no C++17 additions.  (Latest version only).
  • ISO/IEC 14882:2015, known as C++14
  • INCITS/ISO/IEC 9899:2012, known as C11
  • ANSI X3.159-1989, known as C89

The ISO/ANSI C/C++ Compliance level varies between the different compilers. For complete information, please refer to the IAR C/C++ Compiler user documentation in your chosen product.

IEEE 754 standard

IAR Embedded Workbench supports the IEEE 754 standard for floating-point arithmetic.

MISRA C

MISRA C is a software development standard for the C programming language developed by MISRA, The Motor Industry Software Reliability Association. Its aims are to facilitate code safety, portability and reliability in the context of embedded systems, specifically those systems programmed in ISO C.

The first edition of the MISRA C standard, "Guidelines for the use of the C language in vehicle based software", was produced in 1998. In 2004, a second edition was produced with many substantial changes to the guidelines, including a complete renumbering of the rules. Additionally MISRA C:2012 with extended support and MISRA C++:2008 for identifying unsafe code constructs in the C++ standard have also been added to the standards.

IAR Embedded Workbench features an add-on product C-STAT so you can check compliance with rules as defined by MISRA C:2004, MISRA C++:2008 and MISRA C:2012.

Test validation

We use the following commercial test suites to test conformance of our tools to the standards:

  • Plum Hall Validation test suite for ISO/IEC C conformance
  • Perennial EC++ Validation Suite for C++ conformance
  • Dinkum C++ Proofer to test how our libraries conform to the C and C++ standard as well as test our STL implementation against the C++ standard.

In addition to the commercial suites, we use several in-house test suites for testing new features, regression testing, corrected errors, etc.

Download free trial

IAR Embedded Workbench for M16C/R8C - Free trial version

The evaluation license is completely free of charge and allows you to try the software to evaluate its efficiency and ease of use. You can choose either a 14-days trial version or a size-limited version.

When you click download, you will be asked to register to get your license.

Please note the following for the 14-day time-limited version:

  • Time limit for evaluation license is 14 days
  • Source code for runtime libraries is not included
  • No support for MISRA C
  • Limited technical support
  • Not allowed to be used for product development or any kind of commercial use

Please note the following for the Kickstart, size-limited version:

  • A 16 Kbyte code size limitation.
  • Source code for runtime libraries is not included.
  • No support for MISRA C.
  • Limited technical support.
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