Porting

The CWL is a C language, full source code library that is portable to a wide variety of embedded platforms. The following figure highlights the architecture of the CWL:

Open

The blue layers represent the existing firmware capabilities of the Implementor's platform.

The dark green layers represent the core of the CWL.

The light green layers are implementation specific. As depicted in the diagram the CWL core code is insulated from the existing platform interfaces. This means that implementors will not need to alter any code in those modules. Implementors will only modify the Port Layer, and the Equipment Application Layer modules.

The CWL has been ported to Windows, x86 and ARM Linux, and a variety of 16-bit and 32-bit microcontrollers with and without RTOSs. The code should compile cleanly without warnings on all platforms. The compiler must support at least C99 compatibility and a dynamic runtime stack, basic and common requirements supported by most modern toolchains.

Some specific examples in the following sections show a CWL port on a bare metal 16-bit MSP430.