Starter files used in the design of microcontroller-based
embedded systems
These starter files are used in the embedded systems labs at the University of Texas
at Austin. They are specifically designed for EE319K (assembly language), EE345L
(interfacing in C), EE345M (embedded systems, real-time operating systems, and
robotics), EE385J.17 (biomedical instrumentation) and EE464 (capstone design lab). These files are are Copyright by Jonathan W. Valvano. You may use,
edit, run or distribute these files as long as the copyright notices within the
files remain. No specific warrantee exists concerning the accuracy or
reliability of these examples. I think they work, but history has shown,
sometimes I can be wrong.
Functional
descriptions Data sheets
Go to Home Page
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Link to download |
Course(s) |
Type |
Description of starter file |
Applications |
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EE345L |
Metrowerks C |
9S12C32 ADC input, LCD output |
Sample analog input, display output on LCD. This driver can be used for any application needing the ADC on the 9S12C32. |
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Metrowerks C |
9S12DP512 ADC input, LCD output |
Sample analog input, display output on LCD. This driver can be used for any application needing the ADC on the 9S12DP512. |
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Metrowerks C |
9S12C32 LCD graphics interface, including driver, circuit diagram, and design documents. |
Plot graphics, text on a 128 by 64 bit LCD. This driver can be used for a real-time DAS based on the $10 LCD1030 available at www.bgmicro.com. |
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EE345L/EE345M |
TechArts 9S12C32 board |
Place paper between board and protoboard |
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EE319K |
ExpressSCH |
Circuit drawing file of components used in EE319K |
This file can be used when drawing interface circuits for the Adapt 9S12DP512. |
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ExpressPCB |
PCB layout for connectors |
Use this to connect power, stereo jack, 14-pin LCD, 16-pin LCD, 9S12C32, 9S12DP512, DIN5, and various cables to a PCB |
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EE345M |
Metrowerks C |
9S12C32 project for testing unsigned 10-bit digital filters. The input is simulated and the output is displayed using SCI. |
This project can be used to experimentally determine the gain versus frequency response of an unsigned digital filter based on simulated unsigned 10-bit ADC data. |
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EE345M |
Metrowerks C |
9S12C32 project for testing signed 10-bit digital filters. The input is simulated and the output is displayed using SCI. |
This project can be used to experimentally determine the gain versus frequency response of an unsigned digital filter based on simulated signed 10-bit ADC data. |
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EE319K |
Excel |
4-bit sine wave table |
EE319K students can use this Excel sheet to design the 4-bit sine wave table for Lab 8. |
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EE385J.17 |
Excel |
Digital filter design method |
Use this file to design and analyze digital filters with up to 8 poles and 8 zeros. |
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EE319K |
TechArts 9S12DP512 board |
Place paper between board and protoboard |
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EE345L |
ExpressSCH |
Circuit drawing file of components used in EE345L |
This file can be used when drawing interface circuits for the Adapt 9S12C32. |
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EE385J.17 |
ExpressSCH |
Circuit drawing file of components used in EE385J.17 |
This file can be used when drawing interface circuits for the Adapt 9S12C32. |
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EE345M |
Visual C++ |
Code file for a FFT |
Derived from Numerical Recipes in C, Cambridge University Press |
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EE345M |
Visual C++ |
Header file for a FFT |
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Excel |
Simple 16-bit FFT |
Use this file to explore the FFT, understand the Nyquist Theorem and see the consequences of aliasing. |
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Metrowerks assembly |
Serial monitor for the 9S12C32 |
Using a BDM, you can reflash the serial monitor debugger on your 9S12C32 |
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Machine code |
Serial monitor for the 9S12DP512 |
Using a BDM, you can reflash the serial monitor debugger on your 9S12DP512 |
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EE345M |
Metrowerks C |
Fuzzy logic motor controller |
This example shows how to implement a fuzzy logic motor controller on the 9S12C32. It also shows how to link an assembly program (fuzzy logic engine) to a C project (motor controller). |
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EE345L |
Gnu C |
Open source compiler for the 6811 and example files for EE345L Labs 8, 11, and 12 |
EE345L students can use the Gnu project to compile software for the 6811 embedded system. It also includes a 6811 debugger that runs on a 9S12C32. |
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Metrowerks C |
Allocate and Release. |
This very simple memory manager allows you to allocate and release blocks of a fixed size. It illustrates linked lists |
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EE345L |
Metrowerks C |
Memory manager: malloc, calloc, realloc, and free. |
Jacob Egner wrote this memory manager. This manager can be used in systems needing a dynamic memory allocation. In EE345L we use it as a case study to describe the proper use of header and code files. |
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EE345L |
Metrowerks C |
Keyboard interface for 9S12C32 using input capture interrupts |
This example illustrates how input capture interrupts can be used to interface a 2 by 2 matrix keyboard. Output compare interrupts are used to debounce the keyboard. |
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Metrowerks C |
IR detector interface for the 9S12C32. Period measurement |
A digital waveform from a IR detector is placed on PT2, and input capture interrupts are used to measure a sequence of pulses. |
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ICC12 C |
Three examples, LED, DAS, and output compare interrupts |
These examples illustrate how C programs can be compiled on ICC12 and simulated within TExaS |
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EE345L |
Metrowerks C |
LCD interface to the 9S12C32 |
This is a 4-bit mode interface using 6 pins on Port M of the 9S12C32 for any HD44780-based LCD display |
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Metrowerks C |
64 by 8-bit LED interface |
A 64 by 2 bit, 3-color LED board illustrates concepts of device driver, scanned display, double buffer, and output compare interrupts. |
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EE345L |
Excel |
Design process for a low pass filter |
You can use this spreadsheet to design a Butterworth 2-pole analog filter using one op amp, 3 capacitors of the same value, and 2 resistors of the same value. |
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EE345L |
TExaS |
Microcomputer file to link TExaS |
Allows you to compile on Metrowerks and simulate on TExaS |
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EE345L |
Metrowerks C |
Test file for EE345L Lab 1d |
Contains input/output parameters for testing the fixed-point conversion programs in Lab 1d. It is an example of how to test. |
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EE345L |
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EE345L |
ExpressSCH |
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EE345L |
ExpressSCH |
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EE345L |
ExpressSCH |
SPI connected to a 74HC595 |
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EE345L |
ExpressSCH |
SPI connected to a Max549 |
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EE345L |
ExpressSCH |
74HC595 connected to a speaker |
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EE345L |
Parts available for Lab 8 |
EE345L students use this list as they design Lab 8. It includes part number, price, and source for many components needed for an embedded system. |
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EE345L |
ExpressPCB |
PCB layout file |
6811-based design for Labs 8,11,12 |
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EE345L |
ExpressSCH |
Schematic file |
6811-based design for Labs 8,11,12 |
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EE345L |
ExpressSCH |
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Starter file for Lab 9 keyboard interface |
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EE345L |
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Test of reentrant behavior with various FIFO implementations |
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EE345M |
Metrowerks C |
Fully running project |
Real-time OS kernel for 9S12, spin-lock semaphores |
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EE345M |
Metrowerks C |
Prototype for an OS |
Starter file for real-time OS |
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EE345M |
ExpressSCH |
Schematic file |
Robot parts |
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EE345L |
Metrowerks C |
Simple program that toggles an LED on and off, for the 9S12DP512 |
This example illustrates Port P direction register, Port P data register and 1/2 sec time delay using TCNT timer |
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| LocalDP512_asm.zip | EE319K | TExaS | Simple program illustrating how to create a local variable on the stack | This example uses SP index mode to access the local variables, creates a binding using EQU, and has a STK window to observe the local variables on the stack |
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ExpressSCH |
Dual 8-bit DAC |
Use this file when designing an interface with the Max549 |
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EE345L |
Metrowerks C |
Two input, two output FSM |
Illustrates how to many a ROM-based FSM controller, showing linked lists and the timer for the 9S12C32. |
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EE345L |
Metrowerks C |
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EE319K |
TExaS assembly |
Input from PT7 output to PP7 |
This is a very simple 9S12DP512 assembly example with one input and one output. Can be simulated or run on the real 9S12DP512 |
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EE345L |
Metrowerks C |
Output compare interrupt on the 9S12C32 |
Simple output compare 3 interrupt, used to run a FSM in the background. Also includes the PLL. |
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EE345L |
Metrowerks C | Output compare interrupt on the 9S12C32 |
OC3 interrupt software module. The device driver allows the main program to pass a function and set the interrupt period. The main program spins a stepper motor at a constant speed. |
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EE345L |
Metrowerks C |
Output compare periodic interrupt on the 9S12DP512 |
This example illustrates how to create two periodic interrupts, one at 100 Hz)and one at 1000 Hz. |
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EE345M |
Metrowerks C |
Pulse width modulation on the 9S12C32 |
Port T on the 9S12C32 can be used to generate waves with a fixed period, but with a user programmable duty cycle. PWM is an effective means to adjust power to a DC motor. |
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Metrowerks C |
Pulse accumulator on the 9S12C32 |
This is an example application of the pulse accumulator, which can be used to measure period or frequency on PT7. |
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EE345L |
Metrowerks C |
Real time interrupt on the 9S12C32 |
This example illustrates the RTI interrupt on the 9S12C32 |
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EE345L |
Metrowerks C |
Interrupt driven SCI driver for the 9S12C32 |
This example illustrates interrupt-driven serial I/O using SCI, including two FIFOs. The SCI driver includes a debugging instrument to collect histograms of FIFO sizes during execution. |
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Metrowerks C |
SCI driver using two Port T pins |
Use this driver when a second SCI device is needed on the 9S12C32. It uses one input capture and two output compares to implement a virtual SCI port on PT2 and PT3. |
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EE345L |
Metrowerks C | Busy-wait SCI driver for the 9S12C32 | This example illustrates serial I/O using SCI | |
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EE319K |
TExaS assembly | Busy-wait SCI driver for the 9S12DP512 |
This example illustrates serial I/O using SCI0 |
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EE319K |
TExaS assembly | Busy-wait SCI driver for the 9S12DP512 |
This example illustrates serial I/O using SCI1 |
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EE345M |
Metrowerks C |
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EE319K |
TExaS assembly |
Output to PP7 |
This is a simple 9S12DP512 assembly example, showing a LED output and the delay loop. Can be simulated or run on the real 9S12DP512 |
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EE345L |
Excel |
Shows mixing of two sine waves |
Two 5-bit DAC waves are added into one 6-bit output |
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EE345M |
Encapsulated PS |
Circular template for a tachometer |
To be used with an optical sensor for RPM measurement |
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EE345M |
Freehand |
Circular template for a tachometer |
To be used with an optical sensor for RPM measurement |
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EE345M |
Circular template for a tachometer |
To be used with an optical sensor for RPM measurement |
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EE319K |
TExaS assembly |
Output to PP7 |
This is a simple 9S12DP512 assembly example, showing a LED output and the timer. Can be simulated or run on the real 9S12DP512 |
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EE345L |
Metrowerks C |
Timer overflow periodic interrupt |
This example illustrates the TOF interrupt on the 9S12C32 |
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EE319K |
TExaS assembly |
Output to PP7 |
This is a simple 9S12DP512 assembly example with one output, showing the stack and a subroutine. Can be simulated or run on the real 9S12DP512 |
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Metrowerks C |
9S12C32 board tester |
First checkout the orange platform for the tester, download this program to the 9S12C32, quit the debugger, and run Hyperterm |
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| Tester_9S12DP512.zip | Metrowerks C |
9S12DP512 board tester |
First checkout the silver platform for the tester, place board in H1 socket, apply power, download this program to the 9S12DP512, quit the debugger, and run Hyperterm, disconnect power, move to H2 socket, apply power and run tester again |
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EE345L |
Multisim |