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Surround Sound Emulation Program on Blackfin BF533 with Dynamic Source Movement

This project involves creating a surround sound emulation program using the Blackfin BF533 processor. Users can "move" the source of input sound across six speakers: Front Left, Front Right, Front Center, Back Center, Back Left, and Back Right. The program implements TDM for audio output and uses switch/case statements for user interactions, allowing the movement of sound to the left, center, and right. The system is enhanced with visual feedback through indicator lights and incorporates an interrupt-driven design for responsive button handling.

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Surround Sound Emulation Program on Blackfin BF533 with Dynamic Source Movement

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  1. Aaron Worob Surround Sound Emulation

  2. Abstract • Create a program using the Blackfin BF533 that allows the user to “move” the source of input sound.

  3. Specifications • PF9: Move Left Direction • PF10: Return to Center • PF11: Move Right Direction • Lights indicate which of the 6 speakers are “on.” • 1:Front Left • 2:Front Right • 3:Front Center • 4:Back Center • 5:Back Left • 6:Back Right

  4. Implementation • TWI vs TDM • TDM is used as TWI does not allow all 3 output channels to be used. • SW9 pins 5 and 6 MUST be switched off to allow TDM mode

  5. Implementation • 9 Total “Zones” • Switch/Case statements used

  6. Implementation • Light Address Table

  7. Implementation • Modified TDM Talkthrough Example • Initialize • Init_Flash • Added *pFlashA_PortB_Dir = 0x3f; to initialize the Flash Memory for the lights • Init_Interrupts • Modified SIC values to allow buttons and sound • Added register handler for Button Flags • Init_Flags • Added entire function to initialize flags for buttons

  8. Implementation • ISR • Added variables for Channel 2 Left and Right Out. • Added Interrupt Handler for FlagA • Created algorithm to handle button presses • Included switch/case for lights in FlagA interrupt handler • Main • Added Init_Flags(); • Added variables for counter, and Channel 2 Left and Right out

  9. Implementation • Process_Data • Created Switch/Case algorithm to change zones when buttons are pressed • Added Prototype Functions and Variables to header “Talkthrough.h”

  10. Thank You • Thank you for your time and consideration.

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