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CS+ vs Eclipse IDE

CS+

renesas.com

Eclipse IDE

eclipse.org

Side by side

FigureCS+Eclipse IDE
Price fromFreeFree
Free planYesYes
Free trial——
Open source——
WindowsYesYes
macOSYesYes
LinuxYesYes
Plans published21
Spec score · Embedded Development IDEs8.0 (#6)7.9 (#7)
Spec score · C++ IDEs7.9 (#11)7.8 (#15)
Founded20022001
HeadquartersTokyo, JapanBrussels, Belgium
IntegrationsCS+ can interoperate with Smart Configurator for the RX family, and Renesas offers a co-simulation tool linking CS+ with MATLAB and Simulink.The Java Developers package includes a Java IDE, Git client, XML editor, and Maven and Gradle integration.
PurposeCS+ is an integrated development environment and coding tool for developing software for Renesas MCUs.The Eclipse Top-Level Project provides a platform for developing integrated tools and rich client applications.

Plans

CS+

  • CS+ for CA,CXFree
  • CS+ for CCFree

CS+ pricing →

Eclipse IDE

  • Eclipse IDEFree

Eclipse IDE pricing →

In their own words

CS+

CS+ is Renesas’s integrated development environment for creating software for Renesas microcontrollers. The free IDE is available for development and production, while evaluation compiler packages may impose limits. CS+ for CC targets the RL78, RH850, and RX families; CS+ for CA,CX targets RL78, 78K, and V850. Its installer includes compiler packages for target products, and compatible Renesas emulators provide debugging functions. The graphical interface can generate C device-driver programs for MCU peripherals, although generation is unavailable for some MCUs. Modified or saved source files build automatically in the background, and action events can show variable values at a specified address. Smart Browser for CS+ for CC presents device information, hardware manual content, sample code, and related FAQs. CS+ can interoperate with Smart Configurator for RX, and Renesas offers a co-simulation tool linking it with MATLAB and Simulink. Current listed versions run on Windows 10 64-bit and Windows 11; 32-bit use requires CS+ IDE V8.06 or earlier. Debugging emulators are sold separately.

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Eclipse IDE

Eclipse IDE is a free development platform for building integrated tools and rich client applications, available for Windows, macOS, and Linux. Its Java Developers package combines a Java IDE with a Git client, XML editor, and Maven and Gradle integration. The 2026-09 release supports Java 26 and includes a compact source file wizard for Java 25 and later projects, plus a quick assist for converting enhanced for loops to forEach statements. Other platform features include regular expression content assistance in find and replace, console zoom controls, and search filters in Problems, Tasks, and Bookmarks views. Packages cover Java, Enterprise Java and web, C/C++, embedded C/C++, PHP, DSLs, and other development areas. Eclipse Marketplace plugins can extend the platform. The Eclipse Foundation provides project security support, and users can seek community help through its chat space or report issues through its problem reporting process. The Foundation’s default project license is the Eclipse Public License unless project documentation says otherwise. The Eclipse Foundation is an international non-profit association based in Brussels.

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