A Programming Language for Processor Based Embedded Systems

Since embedded software is becoming more and more complex, software reuse is an important issue in processorbased embedded system design. However, many embedded programs can not be reused on various kinds of architectures because the correctness of programs strongly depends on both compilers and processor architectures. In order to overcome the limited reusability, we have proposed an embeddedprogramming language, called Valen-C. In ValenC, programmers can explicitly specify the required bit length of each variable in programs. Valen-C enables programs to be independent of processor architectures and can expand the opportunity of reusing the programs. In this paper, the effectiveness of Valen-C is discussed by clarifying the difference of it from existing languages, and the syntax and semantics of Valen-C are described. The structure of the Valen-C retargetable compiler which we have developed and how to preserve the correctness of programs are also described. 1. Introduction In embed..

Development of an Embedded System LSI for MPEG-2 AAC Decoder: a Case Study

The progress of both digital signal processing technology and LSI process technology are key factors in spreading digital media products in the market. System LSIs which support the function of video and audio data compression are utilized in these systems. This paper presents a case study on the development of an embedded system LSI for MPEG-2 AAC(MPEG-2 Advanced Audio Coding)decoder, based on a soft-core processor and a programming language, called Valen-C. Design results show that we can achieve cost reduction without losing the performance by optimizing the datapath width of the soft-core processor

Development of an Embedded System LSI for MPEG-2 AAC Decoder: a Case Study

The progress of both digital signal processing technology and LSI process technology are key factors in spreading digital media products in the market. System LSIs which support the function of video and audio data compression are utilized in these systems. This paper presents a case study on the development of an embedded system LSI for MPEG-2 AAC(MPEG-2 Advanced Audio Coding)decoder, based on a soft-core processor and a programming language, called Valen-C. Design results show that we can achieve cost reduction without losing the performance by optimizing the datapath width of the soft-core processor