Analog Devices ADSP-2189M EZ-KIT Lite, Manual

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ADSP-2189M EZ-KIT Lite Evaluation System Manual 2-7
Using EZ-KIT LITE Software
On power up, the EZ-KIT Lite board defaults to a baud rate of 57600
baud with 8 data bits, 1 stop bit, and no parity. To change this rate, wait
for the
POST
routine to complete and then use the Settings , Baud Rate
command in the Vi+. Note that setting the baud rate to a lower
number can significantly slow the board’s response to all debug activities.
Different baud rates depend upon your application’s type: for real-time
interrupt driven programs, a lower baud rate setting slows performance,
but the timer interrupt occurs less frequently. This gives your program a
larger share of the processor’s resources.
AD73322 Codec Check and Initialization
On reset, the AD73322 codec is inactive. An initialization routine initial-
izes the codec by sending a series of command words through the
SPORT0 TX
interrupt. Once the commands have been sent and the
AD73322 initialized, it begins transmitting the clock, which synchronizes
data transfers to and from the DSP. Once this bit goes “
High
”, the
AD73322 is ready for standard communication over
SPORT0
.
Monitor Program Operations
The monitor program runs on the EZ-KIT Lite board as part of the DSP
executable and provides the ability to download, debug, and run user pro-
grams. The Vi+ debugger is the interface for the monitor
program. Using the EZ-KIT Lite as a target with the debugger lets you
operate the board remotely.
There are three main components of the monitor program:
• “Halt loop”
• “UART ISR”
• “Command Processing”