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1、C0068C0105C0103C0105C0116C0097C0108 C0083C0105C0110C0101C0262C0087C0097C0118C0101 C0071C0101C0110C0101C0114C0097C0116C0105C0111C0110C0085C0115C0105C0110C0103 C0116C0104C0101 C0084C0077C0083C0051C0050C0048C0067C0050C0120C0120ApplicationReport1998 Digital Signal Processing SolutionsPrinted in U.S.A.,
2、July 1998 SPRA1791998ReportApplicationC0085C0115C0105C0110C0103C0032C0116C0104C0101C0032C0084C0077C0083C0051C0050C0048C0067C0050C0120C0120 C0068C0105C0103C0105C0116C0097C0108C0032C0083C0105C0110C0101C0262C0087C0097C0118C0101C0032C0071C0101C0110C0101C0114C0097C0116C0105C0111C0110Digital Sine-Wave Gen
3、erationUsing the TMS320C2xxSPRA179July 1998Printed on Recycled PaperIMPORTANT NOTICETexas Instruments and its subsidiaries (TI) reserve the right to make changes to their productsor to discontinue any product or service without notice, and advise customers to obtain the latestversion of relevant inf
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10、l, warranty or endorsement thereof.Copyright 1998, Texas Instruments Incorporatediii Digital Sine-Wave Generation Using the TMS320C2xxContents1 Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11、2 Direct Look-Up and Linear Interpolation Method 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 C- and Assembly-Compatible Functions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.1 C-Compatible Functions 2. . . . . . . . . . .
12、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.2 Assembly-Compatible Functions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 Interpolation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13、. . . . . . . . . . . . . . . . . . . 2.3 Functions 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 System Utilization 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14、 . . . . . . . . . . . . . . . . . 2.5 Sine-Generation Precision 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5.1 One-Sine-Period Analysis 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5.
15、2 Quarter-Sine-Period Analysis 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Sine/Cosine With Mathematical Series 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1 C- and Assembly-Compatible Functions 10. . .
16、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.1 C-Compatible Functions 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1.2 Assembly-Compatible Functions 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 Sine/Cosine Mathematical Series 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3 Functions 11. . . .
