Analog Devices ADSP-BF506F EZ-KIT Lite Manual page 34

Power-On-Self Test
Power-On-Self Test
The power-on-self-test program (POST) tests all EZ-KIT Lite peripherals
and validates functionality as well as connectivity to the processor. Once
assembled, each EZ-KIT Lite if fully tested for an extended period of time
with a POST. All EZ-KIT Lite boards are shipped with a POST
pre-loaded into one of their on-board flash memories. The POST is exe-
cuted by resetting the board and pressing the proper push button(s). The
POST also can be used for reference for a custom software design or hard-
ware troubleshooting. Note that the source code for the POST program is
included in the installation directory along with the readme file, which
describes how the board is configured to run a POST.

The POST program is only available when using VisualDSP++.
LEDs and Push Buttons
The EZ-KIT Lite provides two push buttons and three LEDs for gen-
eral-purpose I/O.
The three LEDs, labeled
GPIO ports of the processor. For information on how to program the flag
pins, refer to the ADSP-BF50x Blackfin Processor Hardware Reference
Manual.
The two general-purpose push buttons are labeled
of each individual button can be read through programmable flag inputs
and . The flag reads a '1' when a corresponding switch is being
PF3 PF4
pressed. When the switch is released, the flag reads a '0'. A connection
between the push buttons and processor inputs is established through
a DIP switch,
SW3
driving the signals.
An example program is included in the ADSP-BF506F installation direc-
tory to demonstrate functionality of the LEDs and push buttons.
1-14
through
LED2
. The switch should be turned off when another source is
ADSP-BF506F EZ-KIT Lite Evaluation System Manual
, are accessed via the
LED4
and
PB0
PF0–2
. The status
PB1