Embedded Process Functional Language

Embedded systems represent an important area of computer engineering. Demands on embedded applications are increasing. To address these issues, different agile methodologies are used in traditional desktop applications today. These agile methodologies often try to eliminate development risks in early design phases. Possible solution is to create a working model or a prototype of critical system parts. Then we can use this prototype in negotiation with customer and also to prove technological aspects of our solution. From this perspective functional languages are very attractive. They have excellent abstraction mechanism and they can be used as a tool producing a kind of executable design. In this paper we present our work on a domain specific functional language targeted to embedded systems Embedded process functional language. Created language works on a high level of abstraction and it uses other technologies (even other functional languages) created for embedded systems development on lower levels. It can be used like a modeling or a prototyping language in early development phases

Unified Approach to Environments in a Process Functional Language

A process functional paradigm is based on applications of processes and functions instead of assignments. The imperative computation and the functional evaluation are clearly separated in a well-balanced manner, providing the strong feedback about the implementation to a user. In this paper we present the unified approach to explicit and implicit environments in PFL -- an experimental process functional language, as a uniform basis for approved implementation extensible by additional specification. PFL environmental concept is the generalized implementation substance, which can be found in many programming languages exploiting the large variety of programming paradigms. Environment variables do not occur in expressions, being still visible to a programmer either in PFL textual form or in an equivalent form of control driven data flow graphs