Did you hear something?

The moment of truth has finally arrived; FLAC playback! After going through all the trouble of switching over to a Cortex-M3 controller and SDIO, this is a pretty gratifying moment :D

On the right you’re seeing SD card access reading 512 byte sectors (yellow) and the DREQ signal of the decoder requesting more data (blue). Playing is a 886kpbs FLAC file and just look at the space in between. That means there’s a lot of room for additional functionality.

Some quick notes about clocks;

  • SPI is running at 9 MHz
  • SDIO running at 7.2 MHz
  • Decoder running with recommended 3.5x multiplier and 1.0x addition

Well I’m off listening to some test tracks :)

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