| 一种基于DSP的数字振荡器的实现方式 |
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| 引用本文： | 李方健,曾浩.一种基于DSP的数字振荡器的实现方式[J].重庆职业技术学院学报,2008,17(2):151-154. |
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| 作者姓名： | 李方健 曾浩 |
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| 作者单位： | 1. 重庆电子工程职业学院通信工程系,重庆,401331
2. 重庆大学通信学院,400044 |
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| 摘 要： | 常规的产生正弦信号的方法是将某个频率的正弦/余弦值预先计算出来后制成一个表,DSP工作时仅作查表运算即可。利用定时器产生一个2kHz的正弦信号,定时器被设置成每50uS产生一次中断(等效于采样速率为20K),利用该中断,在中断服务程序中用叠代算法计算出一个SIN值,并利用CCS的图形显示功能查看该波形。中断矢量表用汇编语言编辑,主程序和中断服务程序使用C语言编写。
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| 关 键 词： | 定时器 中断 数字振荡器 DSP |
| 文章编号： | 1672-0067(2008)02-0151-04 |
| 修稿时间： | 2008年3月1日 |
A Realization Method of Digital Oscillator Based on DSP |
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| LI Fangjian,ZENG Hao.A Realization Method of Digital Oscillator Based on DSP[J].Journal of Chongqing Vocational& Technical Institute,2008,17(2):151-154. |
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| Authors: | LI Fangjian ZENG Hao |
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| Abstract: | A regular method to produce sinusoidal signal is to make a form after working out sinusoidal quantity and cosine quantity in advance,and then the table look-at and operation is available when DSP works.This essay has briefly introduced the way to produce sinusoidal signal by digital oscillator:Using 2KHz sinusoidal signal produced by timer,which is set at an interrupt per 50us(equaling the sample rate of 20k);Therefore through the interrupt sinusoidal quantity is worked out in the interrupt service program by iteration technique;And waveform can be searched using graphic display feature.Interrupt vector form is edited by assembly language,while main routine and interrupt service routine are edited by C language. |
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| Keywords: | timer interrupt digital oscillator DSP |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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