Analog Devices ADSP-BF537 EZ-KIT Lite Getting Started page 72

Part 1: Creating an Audio Pass-Through Application with VDK
to service the audio stream, which receives around 24,000 samples (or data
points) per second, than to service the Ethernet stack, which is operating
on a "human" scale and perhaps a few keystrokes (data points) per second.
Furthermore, considerably more processing is done per data point within
the Ethernet software. If the Ethernet stack is given a higher priority, the
keystroke processing may take too much time, leaving the audio stream
un-serviced for an appreciable amount of time. Ultimately, this can result
in audible clicks in the final audio output whenever a key is pressed,
degrading the user experience.
The software interface to the DAC (AD1854) and ADC (AD1871) con-
verters is managed by device drivers written specifically for these devices
(Figure 3-3).
Figure 3-3. AD1854 and AD1871 Device Drivers
3-6
www.BDTIC.com/ADI
Getting Started with ADSP-BF537 EZ-KIT Lite