Embedded Systems Design - July 2008 - (Page 24) cover feature Visualization of the function call graph, showing functions as boxes and function calls as arrows. CleanC, the variable should be declared locally and passed as a parameter to other functions using it. A code-cleaning transformation tool can move a global variable to a function scope and add parameters to other functions and their calls as required. Listings 3 and 4 show an example and counterexample relating to a practical implementation of CleanC. CLEANC’S ANALYSIS TOOLS IMEC introduces the CleanC analysis tools to assist designers in analyzing the source code and identifying the problematic constructs. For example, with respect to usage of the manifestloop pattern, optimization tools indicate which loops do not follow this pattern. As a result, violations of the CleanC rules are listed. The analysis tools also include various visualizations of function-call graphs, as some types of CleanC violations are easier to convey in a graphical way. User-guided code transformations may then be applied to the source code to make it compliant with the CleanC programming style. To optimize this process, IMEC is currently developing interactive refactoring tools. For example, to distinguish source files from header files, a code-cleaning transformation tool may automatically expand any preprocessing pattern that is not supported by the optimization tools. The analysis and refactoring tools are available as plug-ins for the Eclipse/CDT (C/C++) development platform. These tools are thus integrated in a highly interactive environment where the code may be checked or transformed at any moment while it’s being developed and tested. Figure 2 shows a visualization of the function call graph, showing functions as boxes and function calls as arrows. Once the code has been cleaned into CleanC compliant code, it can be used as source code for IMEC’s mapping tools that assist the designer in mapping the application onto the parallel platform. These tools are responsi- Figure 2 The MPSoC programming model. MPSoC interactive cleaning tool Embedded software designer MPSoC mapping tools Platform services description Hardware system expert Sequential ANSI C Clean-C + hints Predictable platform services MPSoC platform Valley of misery Figure 3 24 JULY 2008 | embedded systems design | www.embedded.com http://www.embedded.com
Table of Contents Feed for the Digital Edition of Embedded Systems Design - July 2008 Embedded Systems Design - July 2008 Contents #Include Parity Bit Programming Pointers Interactive C-code Cleaning Tool Supports Multiprocessor SoC Design Building a Power Supply for Discontinuous Transmission Wireless Networks An Exception Primer Advertising Index Break Points Marketplace Embedded Systems Design - July 2008 Embedded Systems Design - July 2008 - Embedded Systems Design - July 2008 (Page Cover1) Embedded Systems Design - July 2008 - Embedded Systems Design - July 2008 (Page Cover2) Embedded Systems Design - July 2008 - Embedded Systems Design - July 2008 (Page 1) Embedded Systems Design - July 2008 - Embedded Systems Design - July 2008 (Page 2) Embedded Systems Design - July 2008 - Contents (Page 3) Embedded Systems Design - July 2008 - Contents (Page 4) Embedded Systems Design - July 2008 - Contents (Page 5) Embedded Systems Design - July 2008 - Contents (Page 6) Embedded Systems Design - July 2008 - #Include (Page 7) Embedded Systems Design - July 2008 - #Include (Page 8) Embedded Systems Design - July 2008 - Parity Bit (Page 9) Embedded Systems Design - July 2008 - Programming Pointers (Page 10) Embedded Systems Design - July 2008 - Programming Pointers (Page 11) Embedded Systems Design - July 2008 - Programming Pointers (Page 12) Embedded Systems Design - July 2008 - Programming Pointers (Page 13) Embedded Systems Design - July 2008 - Programming Pointers (Page 14) Embedded Systems Design - July 2008 - Programming Pointers (Page 15) Embedded Systems Design - July 2008 - Programming Pointers (Page 16) Embedded Systems Design - July 2008 - Programming Pointers (Page 17) Embedded Systems Design - July 2008 - Interactive C-code Cleaning Tool Supports Multiprocessor SoC Design (Page 18) Embedded Systems Design - July 2008 - Interactive C-code Cleaning Tool Supports Multiprocessor SoC Design (Page 19) Embedded Systems Design - July 2008 - Interactive C-code Cleaning Tool Supports Multiprocessor SoC Design (Page 20) Embedded Systems Design - July 2008 - Interactive C-code Cleaning Tool Supports Multiprocessor SoC Design (Page 21) Embedded Systems Design - July 2008 - Interactive C-code Cleaning Tool Supports Multiprocessor SoC Design (Page 22) Embedded Systems Design - July 2008 - Interactive C-code Cleaning Tool Supports Multiprocessor SoC Design (Page 23) Embedded Systems Design - July 2008 - Interactive C-code Cleaning Tool Supports Multiprocessor SoC Design (Page 24) Embedded Systems Design - July 2008 - Interactive C-code Cleaning Tool Supports Multiprocessor SoC Design (Page 25) Embedded Systems Design - July 2008 - Interactive C-code Cleaning Tool Supports Multiprocessor SoC Design (Page 26) Embedded Systems Design - July 2008 - Building a Power Supply for Discontinuous Transmission Wireless Networks (Page 27) Embedded Systems Design - July 2008 - Building a Power Supply for Discontinuous Transmission Wireless Networks (Page 28) Embedded Systems Design - July 2008 - Building a Power Supply for Discontinuous Transmission Wireless Networks (Page 29) Embedded Systems Design - July 2008 - Building a Power Supply for Discontinuous Transmission Wireless Networks (Page 30) Embedded Systems Design - July 2008 - Building a Power Supply for Discontinuous Transmission Wireless Networks (Page 31) Embedded Systems Design - July 2008 - Building a Power Supply for Discontinuous Transmission Wireless Networks (Page 32) Embedded Systems Design - July 2008 - Building a Power Supply for Discontinuous Transmission Wireless Networks (Page 33) Embedded Systems Design - July 2008 - Building a Power Supply for Discontinuous Transmission Wireless Networks (Page 34) Embedded Systems Design - July 2008 - An Exception Primer (Page 35) Embedded Systems Design - July 2008 - An Exception Primer (Page 36) Embedded Systems Design - July 2008 - An Exception Primer (Page 37) Embedded Systems Design - July 2008 - An Exception Primer (Page 38) Embedded Systems Design - July 2008 - An Exception Primer (Page 39) Embedded Systems Design - July 2008 - An Exception Primer (Page 40) Embedded Systems Design - July 2008 - An Exception Primer (Page 41) Embedded Systems Design - July 2008 - An Exception Primer (Page 42) Embedded Systems Design - July 2008 - An Exception Primer (Page 43) Embedded Systems Design - July 2008 - Advertising Index (Page 44) Embedded Systems Design - July 2008 - Break Points (Page 45) Embedded Systems Design - July 2008 - Break Points (Page 46) Embedded Systems Design - July 2008 - Marketplace (Page 47) Embedded Systems Design - July 2008 - Marketplace (Page 48) Embedded Systems Design - July 2008 - Marketplace (Page Cover3) Embedded Systems Design - July 2008 - Marketplace (Page Cover4)
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