Skip to content Skip to navigation

Connexions

You are here: Home » Content » Audio Processing Board for the TMS320F2812 DSP

Navigation

Content Actions
  • Download module PDF
  • Add to ...
    Add the module to:
    • My Favorites
    • A lens
    • An external social bookmarking service
    • My Favorites (What is 'My Favorites'?)
      'My Favorites' is a special kind of lens which you can use to bookmark modules and collections directly in Connexions. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need a Connexions account to use 'My Favorites'.
    • A lens (What is a lens?)

      Definition of a lens

      Lenses

      A lens is a custom view of Connexions content. You can think of it as a fancy kind of list that will let you see Connexions through the eyes of organizations and people you trust.

      What is in a lens?

      Lens makers point to Connexions materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

      Who can create a lens?

      Any individual Connexions member, a community, or a respected organization.

      What are tags? tag icon

      Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

    • External bookmarks
  • E-mail the author
  • Rate this module (How does the rating system work?)

    Rating system

    Ratings

    Ratings allow you to judge the quality of modules. If other users have ranked the module then its average rating is displayed below. Ratings are calculated on a scale from one star (Poor) to five stars (Excellent).

    How to rate a module

    Hover over the star that corresponds to the rating you wish to assign. Click on the star to add your rating. Your rating should be based on the quality of the content. You must have an account and be logged in to rate content.

    		(0 ratings)

Recently Viewed

This feature requires Javascript to be enabled.

Audio Processing Board for the TMS320F2812 DSP

Module by: Patrick Frantz

Summary: This module gives a technical description for an audio processing daughterboard intended for use with the TMS320F2812 eZdsp kit from Spectrum Digital.

Note: Your browser may not currently support MathML. See our browser support page for additional details. You can always view the correct math in the PDF version.

Overview

This module describes an audio signal processing daughtercard that has been designed for use with a Texas Instruments TMS320F2812 DSP. The daughtercard is meant to be used with the corresponding eZdsp kit from Spectrum Digital. This card was designed to teach students about various functions of the TMS320C2000 series of DSPs in a practical setting, and to allow them to perform basic audio experiments. The figure below shows a simplified block diagram of the audio daughtercard, the features of which will be discussed in the next section.

Figure 1: A simplified system block diagram for the audio daughtercard.
System Block Diagram
System Block Diagram (audio_card.jpg)

Technical Description

System Features

The audio daghtercard has the following features and functionality:

Audio Daughtercard Features List

  • Stereo analog input with maximum input voltage of 500mVpp.
  • Amplification to 0 to 3V range of TMS320F2812 12-bit ADC.
  • Programmable pre-ADC anti-alias filtering using the MAX7414, a 5th order lowpass Butterworth filter with a tunable f c f c from 1 to 15kHz.
  • 2 12-bit DAC Channels using the TLV5638.
  • Programmable post-DAC filtering using the MAX7414.
  • Output power amplification capabale of driving 0.7W into an 8 Ohm load, using the TPA721.
  • 2 Potentiometers connected to ADC inputs.
  • Pushbutton input capable of interrupting the DSP.
  • Pushbuttons to shutdown power amplification
  • 8 element LED array
  • DSP control over the following: pre-ADC and post-DAC filter shutdown, pre-ADC and post-DAC filter f c f c , and power amplifier shutdown.

Comments, questions, feedback, criticisms?

Send feedback