Tan, L., & Jiang, J. (2011, June), Teaching Digital Filter Implementations Using the 68HC12 Microcontroller  Paper presented at 2011 ASEE Annual Conference & Exposition, Vancouver, BC. 10.18260/1-2--18681

\bibitem{asee_peer_18681}
  Tan, L., \& Jiang, J. (2011, June), \emph{Teaching Digital Filter Implementations Using the 68HC12 Microcontroller}
  Paper presented at 2011 ASEE Annual Conference \& Exposition, Vancouver, BC.
  10.18260/1-2--18681

Li Tan and Jean Jiang.  "Teaching Digital Filter Implementations Using the 68HC12 Microcontroller".  2011 ASEE Annual Conference & Exposition, Vancouver, BC, 2011, June.  ASEE Conferences, 2011.  https://peer.asee.org/18681 Internet.  29 Jun, 2024

\bibitem{asee_peer_18681}
  Li Tan and Jean Jiang.
  "Teaching Digital Filter Implementations Using the 68HC12 Microcontroller".
  \emph{2011 ASEE Annual Conference \& Exposition, Vancouver, BC, 2011, June}.
  ASEE Conferences, 2011.
  https://peer.asee.org/18681 Internet.  29 Jun, 2024

@INPROCEEDINGS{asee_peer_18681
author = "Li Tan and Jean Jiang"
title = "Teaching Digital Filter Implementations Using the 68HC12 Microcontroller"
booktitle = "2011 ASEE Annual Conference \& Exposition"
year = "2011"
month = "June"
address = "Vancouver, BC"
publisher = "ASEE Conferences"
note = {https://peer.asee.org/18681}
number = {10.18260/1-2--18681}
}

TY  - CPAPER
AB  -       Teaching Digital Filter Implementations Using the 68HC12                            MicrocontrollerAbstractIn this paper, we present our pedagogies for teaching digital filter implementations using the68HC12 microcontroller. In the Electrical and Computer Engineering Technology (ECET)curriculum, the microcontroller has been used as a popular platform for teaching the embeddedsystem course in the sophomore year. After completing the embedded system course, studentsbecome familiar with the microcontroller software development tools, and are able to performassembly and C programming and apply necessary hardware for hands-on applications. Inaddition, most microcontrollers have a capability to perform basic digital signal processing(DSP) tasks such as digital filtering. Considering these facts, using the microcontroller in thelater DSP course in the junior year could offer the following benefits to ECET students: (1) themicrocontroller can be used as an alternative and cost effective solution when a DSP processorsuch as TMS320C67xx is not available; (2) students can save a significant amount of time forlearning and familiarizing with the new system architecture, corresponding development toolsand assembly instructions. Instead, they can focus on learning the implementation of digitalfilters and DSP applications; (3) the microcontroller is flexible when it is used to develop variousapplications including signal processing.     We instruct the digital filter implementations based on a platform as shown in Figure 1,where it consists of the signal condition circuit, low-cost 68HC12 microcontroller and digital-to-analog converter device (AD557). A simple program to flexibly set up the sampling rate is firstdeveloped and the key assembly instructions for digital filtering are reviewed. Next, we illustratethe fixed-point data format, finite impulse response (FIR) filter and (infinite impulse response)IIR filter structures with the direct form I and form II. After the digital filters are designed byusing MATLAB, real-time FIR and IIR filter implementations are then developed using a linearbuffering technique. Furthermore, we also illustrate filter implementations for tone generation,sampling rate conversion and FIR filter with a circular buffering technique.     Finally, we will examine the course assessment according to our collected data from courseevaluation, student surveys and student course work, and address the course improvement basedon our assessment.                                                                             Output:                                                                             Sample and hold signal                                                                             Range: 0-2.55 volts                      ADC channel 6                                 P-Port                      Range: 0-5 volts                                           x(t)             Analog input               signal         Signal                 68HC12                      AD557                            conditioning          Microcontroller                                                    Figure 1Partial list of References[1] D. J. Pack, S. F. Barrett, 68HC12 Microcontroller: Theory and Applications. Prentice Hall,2002.[2] L. Tan, Digital Signal Processing: Fundamentals and Applications. Elsevier/Academics,2007.[3] T. B. Welch, C. H.G. Wright, M. G. Morrow, Real-Time Digital Signal Processing. CRCPress, 2006.[4] D. Crover, J. R. Deller, Digital Signal Processing and the Microcontroller. Prentice Hall,1999.[5] Axiom Manufacturing: http://www.axman.com/
AU  - Li Tan
AU  - Jean Jiang
CY  - Vancouver, BC
DA  - 2011/06/26
PB  - ASEE Conferences
TI  - Teaching Digital Filter Implementations Using the 68HC12 Microcontroller
UR  - https://peer.asee.org/18681
DO  - 10.18260/1-2--18681
ER  -