Pascal

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Pascal is a classical procedural programming language that facilitates structured programming. It advantages include english-like elegant source code style, a plethora of data types and a broad basis of implementations on both virtual and physical machines. Most modern Pascal compilers implement ObjectPascal, an extension for object-oriented programming that has first been proposed by Apple and that was later augmented by Borland.

There are numerous Pascal dialects available for embedded systems:

Overview of Pascal compilers for embedded systems
Compiler / IDE Company License Development platform Target platform Comments
Free Pascal Free Pascal team wikipedia:GPL, wikipedia:LGPL Linux, Mac OS X, Win32 Multiple ARM Linux embedeed systems,
including Android and Raspberry Pi
Mature, stable version
Free Pascal Free Pascal team wikipedia:GPL, wikipedia:LGPL Linux, Mac OS X, Win32 x86-based Linux embedded systems Mature, stable version
Free Pascal Free Pascal team wikipedia:GPL, wikipedia:LGPL Linux, Mac OS X, Win32 PPC-based Linux embedded systems Mature, stable version
Free Pascal Free Pascal team wikipedia:GPL, wikipedia:LGPL Linux, Mac OS X, Win32 Atmel AVR Experimental
Lazarus for Free Pascal Lazarus team wikipedia:GPL, wikipedia:LGPL Linux, Mac OS X, Win32 Multiple ARM Linux embedeed systems,
including Android and Raspberry Pi
GUI-based IDE for Free Pascal
Pascal-scm E-LAB Computers proprietary Win32 Atmel AVR Demo version available, standard version for ATMega8/88 free
MikroPascal for AVR Mikroelektronika proprietary Win32 Atmel AVR 2K Demo version available
PasAVR Vogelaar Electronics proprietary Win32 DelphiStamp Cross-Compiler for Object Pascal