ECE445 Assignment 1 (due 21 Jan 1999)
You can do the assignment as groups. Each group should submit one
set of documentation. Do the exercises corresponding to
your group's hardware. Be prepared to demonstrate your accomplishments
in class on the due date.
TMS320C3x DSP Starter Kit
Download the zip archive dskhw1.zip to obtain
files needed for this assignment.
oscope.exe to capture sine waves of various frequencies from
the signal generator. Fit an ideal sine wave to the captured signal and use this information
to determine the amplitude, frequency, and effective input resolution (in bits).
Try this for different sampling rates. Plot the effective resolution versus frequency.
Also plot the transfer function (amplitude out / amplitude in) versus frequency.
- Write a new version of SG_USER.ASM. Submit an oscilloscope trace of the output and
a printed listing of your program.
- Use the DSK3D debugger on TOGGLE.ASM. Find the address for PRD0. Change this
value in memory so that the LED changes every 2 seconds (instead of every 0.5 sec).
- Connect the switch and LED to I/O pins on the BASIC stamp. Remember to use a
current-limiting resistor in series with the LED. Write a program to cycle the LED on and
off at a selected rate, e.g. 1 second on/ 1 second off.
- Write a program to measure reaction time. Program a random pause of several sections,
turn the LED on and measure the time before the subject activates the switch. Display this
time on the PC.
- Use the PWM command in BASIC to generate a triangular waveform. Measure the fundamental
frequency of the modulated signal. Insert a simple RC low-pass filter to eliminate the modulation.
Display the result on an oscillosope.
You should submit documentation of your hardware (breadboard circuit) and software, including
Maintained by John
Loomis, last updated 15 Jan 1999