Leds And Push Buttons - Analog Devices ADSP-21364 EZ-KIT Lite Manual

LEDs and Push Buttons

The EZ-KIT Lite has eight general-purpose user LEDs and four gen-
eral-purpose push buttons.
Two of the general-purpose push buttons are attached to the
the processor, while the other two are attached to the DAI pins. All of the
push buttons connect to the processor through a DIP switch. The DIP
switch allows processor pins, which connect to the push buttons, to be dis-
connected. See
instructions on how to disable the push buttons from driving the corre-
sponding processor pin.
The value of the push buttons connected to the
mined by reading the
DAI pins must be configured as interrupts. It is necessary to set up an
interrupt routine to determine each pin's state.
push button connects to the processor. Refer to the related example pro-
gram shipped with the EZ-KIT Lite for more information.
Table 1-2. Push Button Connections
Push Button Reference Designator
SW1
SW2
SW3
SW4
The LEDs are connected to the parallel port pins,
parallel port of the processor can be set up as a memory bus or as gen-
eral-purpose
FLAG
cases. Information about setting up the latch can be found in
ton Enable Switch (SW9)" on page 2-10
ADSP-21364 EZ-KIT Lite Evaluation System Manual
"Push Button Enable Switch (SW9)" on page 2-10
register. The push buttons connected to the
FLAG
Processor Pin
FLAG1
FLAG2
DAI19
DAI20
pins. The latch allows the LEDs to be written to in both
Using EZ-KIT Lite
pins can be deter-
FLAG
Table 1-2 shows how each
, via a latch. The
AD7–0
.
pins of
FLAG
for
"Push But-
1-9