Arm Keil MDK vs Eric

Arm Keil MDK is a toolchain for embedded software targeting Cortex-M and Ethos-U processors. MDK v6 supports command-line, IDE, and continuous-integration workflows across major operating systems. It includes Keil Studio extensions for Visual Studio Code, Keil μVision, Arm Compiler for Embedded, and Arm Fixed Virtual Platform models. Software packs add device and board support, middleware, components, code templates, and example projects independently of the toolchain. Keil Studio supports CMSIS workflows with an integrated debugger and extensions for creating, building, and testing embedded applications. Listed integrations include CMSIS-FreeRTOS, Keil RTX5, MDK-Middleware, IoT clients, CMSIS-DAP, ULink, and third-party debug adapters. Community is for non-commercial use. The listed MDK v6 Essential plan costs $99 a month per license; Professional costs $199 a month per license and adds Arm Virtual Hardware, functional-safety compiler tools, and legacy tools including Arm Compiler 5. Keil μVision is available only for Windows hosts.

Eric is a Python editor and IDE based on Qt and Scintilla, intended for quick edits as well as project management. Its current stable version, eric7, is based on PyQt6, Qt6 and Python 3. Editing tools include syntax highlighting, autocompletion, calltips, source folding, brace matching, error highlighting and project-wide search and replace. For development, it includes a Python debugger with multi-thread and multiprocessing support, profiling, code coverage, code checking, task management and unittest support. Core plugins provide interfaces for Mercurial, Subversion and Git repositories, and users can load further extensions from its Plugin Repository. Python tools include pip and virtual environment management and an interactive shell; rope refactoring is available as an optional plugin. Eric also lists chat and a shared editor as cooperation functions. It runs on Linux, macOS and Windows, and can be installed through PyPI or a distribution archive. The maker recommends installation in a Python virtual environment, and directs Windows users to a ZIP archive. It is free, with no price or usage limits stated.