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By Donald S. Reay

Teaches electronic sign processing options through hands-on examples

The OMAP-L138 eXperimenter is the most recent low-cost DSP improvement procedure to be followed via the Texas tools collage software. The OMAP-L138 processor comprises either ARM and DSP cores and is geared toward moveable and cellular multimedia purposes. This e-book concentrates at the demonstration of real-time DSP algorithms applied on its C6748 DSP middle.

Digital sign Processing and purposes with the OMAP-L138 eXperimenter presents an in depth and entire set of application examples to help teachers in educating DSP in a laboratory utilizing audio frequency signals—making it a great textual content for DSP classes at senior undergraduate and postgraduate degrees.

matters coated contain polling-based, interrupt-based, and DMA-based I/O equipment, and the way real-time courses could be run utilizing the board help library (BSL), the DSP/BIOS real-time working method, or the DSP/BIOS Platform aid package deal.

Chapters contain:

  • Analog enter and output with the OMAP-L138 eXperimenter

  • Finite impulse reaction filters

  • countless impulse reaction filters

  • speedy Fourier remodel

  • Adaptive filters

  • DSP/BIOS and platform aid package deal

each one bankruptcy starts with a assessment of history idea after which offers a couple of real-time software examples to augment figuring out of that concept and to illustrate using the OMAP-L138 eXperimenter and Texas tools Code Composer Studio built-in improvement environment.Content:
Chapter 1 OMAP?L138 improvement approach (pages 1–37):
Chapter 2 Analog enter and Output with the OMAP?L138 eXperimenter (pages 38–102):
Chapter three Finite Impulse reaction Filters (pages 103–158):
Chapter four countless Impulse reaction Filters (pages 159–211):
Chapter five quickly Fourier rework (pages 212–278):
Chapter 6 Adaptive Filters (pages 279–306):
Chapter 7 DSP/BIOS and Platform aid package deal (pages 307–335):

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Additional info for Digital Signal Processing and Applications with the OMAP-L138 eXperimenter

Sample text

5 dB steps, using page 0 control registers 43 and 44. Left and right channel gains and attenuations are independently programmable, but in function L138_initialise_poll() they are set equal. Most of the example programs in this book use 0 dB gain settings which are suitable for line level input signals from sound cards, mp3 players, signal generators, and so on. In order to use a dynamic microphone as an input device, the gain preceding the ADC should be increased from 0 to 24 dB. Although polling is a simple method of I/O, it is inefficient because the processor can spend nearly all of its time repeatedly testing whether the codec is ready to transmit or receive data.

The program may be run again after clicking the Restart toolbar button. If this is unsuccessful, select Target > Reset > System Reset and Target > Reload Program before clicking Run again. c in an Editor window. c there. c can be altered. (1) Change the AIC3106 codec sampling frequency from 48 to 24 kHz by changing the line that reads initialise_intr(FS_48000_HZ, ADC_GAIN_0DB, DAC_ATTEN_0DB); to read initialise_intr(FS_24000_HZ, ADC_GAIN_0DB, DAC_ATTEN_0DB); Select Target > Reset > CPU Reset and then Project > Build Active Project.

In a low-pass system, an effective antialiasing filter is one that allows frequency components below half the sampling frequency to pass but which attenuates greatly, or stops, frequency components equal to or greater than half the sampling frequency. A suitable DAC for a low-pass system is itself a low-pass filter having characteristics similar to the aforementioned antialiasing filter. The term DAC commonly refers to an electronic device that converts sample values represented in digital hardware into an analog electrical signal.

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