Testing The Board Using The Factory Design - Altera DSP Development Kit User Manual

Getting Started
Testing the
Board Using the
Factory Design
Figure 2–6. Factory Design Functional Block Diagram
NCO
100 MHz
12.5 MHz
Clock Signal
Sine Wave Source
NCO
1.25 MHz
Sine Wave Source
Altera Corporation
May 2005
When you apply power to the board, the Stratix II device is programmed
with the factory design stored in flash memory. After the device is
programmed, LEDs D5 through D8 behave as a binary counter that
counts down to zero. This is a power-up indication that the board is
functional and the device was successfully programmed with the factory
design.
1
If you do not see the LEDs behaving as described above shortly
after power is applied to the board, disconnect power. Make
sure that SW9 is switched to "ON" and switch 4 on SW2 is in the
"OPEN" position, then apply power to the board again.
In the factory design, two sine waves are generated by two blocks of IP
generated by the Altera NCO Compiler. One of these oscillators is
running at 10 times the frequency of the other, but both of them have the
same amplitude, covering 13 bits of dynamic range. The two sine waves
output from these blocks are added together and the output is converted
from a 2's complement representation into unsigned integer format. This
combined sine wave signal of 14-bits dynamic range is sent to a 14-bit
D/A converter. The analog output of a D/A converter is connected, via
the included SMA cable, with the analog input of a 12-bit A/D converter.
The A/D converter's digital output is looped back to the Stratix II device.
The design converts this loopback input from 2's complement format to
unsigned integer format. The converted loopback data is captured by an
instance of the SignalTap
analysis. Figure 2–6 shows a high-level view of the factory design and
how it interacts with the D/A and A/D converters on the board in the
following sections.
EP2S60 Device (U18)
comb[13..0]
Development Kit Version 1.1.0
DSP Development Kit, Stratix II Edition Getting Started User Guide
II logic analyzer in the design for display and
®
comb[13..0]
SignalTap II
a2db[11..0]
DAC904 Device
(U15)
DAC B OUT (J17)
SMA Connector
DAC B
SMA Cable and
SLP-50 Low-pass
AD94338 device
Filter
(U1)
ADC A
ADC A IN (J1)
SMA Connector
2–13