This week’s lab covers two areas, conversion of digital HCS12 

signals to an analog format, and the use of a Serial Peripheral Interface (SPI) 

to transfer data, and commands between the HCS12, and the DAC 



For this lab, the deliverables include the cover sheet, 

filled-in sections of the lab report, photographs (online), or instructor 

sign-offs (onsite), and answers to the questions. The cover sheet must be 

completed in typed format. 

Lab Steps

STEP 1: Download the 


Download Lab 5 located in DocSharing and save it to your PC. 

STEP 2: Predict the Results of Waveform 

Generation Program

Study the 340_lab5_1 program and predict the performance, and 

outputs of the code. Answer the questions in Part A, Step 2. 

STEP 3: Run the Waveform Generation 


Use the 340_lab5_1 program to load the Dragon12 board and verify 

the operation. Photograph your circuit with an oscilloscope attached (online), 

or obtain your instructor’s sign-off (onsite). 

STEP 4: Design Project 

Modify the software to produce, either a square wave, or 

sawtooth wave based on user input. Photograph your circuit with an oscilloscope 

attached to show both waveforms (online), or obtain your instructor’s sign-off 


STEP 5: Answer the Questions 

There are two questions that must be answered in this lab. 

STEP 6: Complete the Cover 


Type the required information onto the cover sheet. 

STEP 7: Submit Your Deliverables 

See Syllabus/Due Dates for Assignments & Exams for due date 


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