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CLanguage Programming for DSP

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CLanguage Programming for DSP. T. he C programming language has. become the language of choice for. many engineering applications ...

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CLanguage Programming for DSPPage 11www.pentek.comOne Park Way Upper Saddle River New Jersey 07458Tel: 201.818.5900Fax: 201.818.5904 Email: info@pentek.comPentek Inc.Continued on next page]Programming in C for digitalsignal processing applicationshas moved into widespread useand many powerful tools havebeen developed to assist theprogrammer. By first understanding some of the basicconcepts and special considerations involved the experiencecan be extremely rewarding.As the software tools striveto keep pace with the rapiddevelopment of powerful newDSP devices the mastery ofspecial programming skills willcontinue to be an exciting anddynamic process.CLanguage Programming for DSPThe C programming language hasbecome the language of choice formany engineering applicationsespecially digital signal processing. The Clanguage is extremely portable compactand lends itself well to structured programming techniques. It has been portedto virtually every major programmingplatform and is the predominant systemprogramming language for the major operating systems used today.Programmers familiar with the C language on PC or UNIX platforms should beaware of some key differences between Cprogramming for generalpurpose workstations and C programming for DSPs.Areas of attention include differencesbetween native and cross compilers simulators I/O library support runtimelibraries linkers and memory modules.The major difference in C compilers forDSP as compared to typical C compilersfound in most workstations is that the objectcode produced does not execute on the hostCPU but rather on the DSPchip in the targetboard. This type of C compiler is called across compiler. The moreconventional Ccompiler which produces code for the hostCPU is known as a native compiler.The reason that cross compilers aresomuch moreappropriate than native compilersfor DSPis that virtually no DSPprocessorenvironment can come close to providing allof the supporting I/O resources available oneven the most modest works ...

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