By Jesse W. Spalding

Microcontroller Choice

Motorola 9S12DP256B

◦ Set to 24 MHz for the Bus Frequency

◦ Memory 256K Bytes of ROM 12K Bytes of RAM 4K Bytes of EEPROM

◦ MicroC/OS Kernel Timeslice Period of 1ms Semaphores to communicate between tasks

MicroC/OS-II Real Time Preemptive Multitasking Kernel

By Jean J. Labrosse

Portable and Reusable Design

4. Start Task5. Setup Task6. Time and Temp Task7. DAA Task8. Key Task

Description◦ Initializes System◦ Creates Other Tasks◦ Priority: 4◦ Period of Task is once at start up◦ Estimated Execution Time is approximately

150ms

Description◦ The task controls and deciphers the different modules. It

does the intertask communication between them all. It interprets user’s inputs both home user and phone user. It controls the DTMF input and the phone line interface over the DAA. Will also control the relays.

Priority: 5 Execution Time: approximately 3.75ms Period: 10ms CPU Load: approximately 0.375

Description◦ It gets information from the RTC (which includes

temperature) and also receives alarm which are set up

Priority: 6 Execution Time: 40us Period: Every Second CPU Load: .00004

Description: This task samples the RING pin (pin 8) on the DAA for a valid ring. If it does it sets a flag.

Priority: 7 Execution Time: 50us Period: 20ms CPU Load: .0025

◦ Code designed by: Leo Wan

Description◦ Scans for a valid key input on Port H. Updates the

keypad buffer if a key is pressed and verified Priority: 8 Execution Time: 50us Period: 10ms CPU Load: 0.005

◦ Code designed by: Todd Morton & Thomas Chia

Max CPU Load: 0.375+0.0004+0.0025+0.005 = 0.3829

Average CPU Load: Approximately 0.3

Modules Tasks Public Functions and Data

Main.c Start Task Control Task

LCD.c written by Todd Morton

LcdInit()LcdClrDisp()LcdMoveCursor()LcdDispStrg()LcdDispChar()LcdDispTime()LcdCursor()

Key.c written by Todd Morton and Thomas Chia

KeyTask KeyInit()KeyPend()

EEProm.c written by Todd Morton

EEPROMInit()EESectModify()

VoiceCtrl.c written by Justin Klumpp

VoiceInit()PlayMSG()

DAA.c written by Leo Wan

DAA Task DAAInit()DAAOffHook()DAAOnHook()

Modules Tasks Public Functions and Data

RTCDriver.c written by Todd Morton

RTCInit()RTCXfr()

VoiceDriver.c written by Jon Peterson

VoiceInit()VoiceXfr()

TimeTemp.c written by Todd Morton

RTC Task Relay()

VoiceCtrl.c written by Justin Klumpp

VoiceStart()PlayMSG()

DTMF.c written by Leo Wan

DTMFInit()DTMFWrite()DTMFRead()

ThermUI.c parts written by Leo Wan

TimeSet() DofWSet() TempSet() SetHys()Alarm1Set() Alarm2Set() PasswordSet() PhoneSet() PhoneTest() UIMain() UIMenu()

KeyTask()

KeyInput.Buffer

Public Functions

KeyInit()

KeyPend()

Keypad Driver

KeyInput.Flag

KeyScan()

Set

Up

Down

10ms

Lcd()

ThermUI.c Public Function(s) LCD I/O

TimeSet()

LcdInit()

LcdDispChar()

LcdDispStrg()

LcdCursor()

LcdMoveCursor()

DofWSet()

TempSet()

SetHys()

Alarm1Set()

Alarm2Set()

PasswordSet()

PhoneSet()

PhoneTest()

UIMenu()

UIMain()

LCD Driver

LcdClrDisp()

LcdDispTime()

Control Task Flow Diagram

ControlTask()

Functions to Call Control Task Flags Pending

10ms

TimeSet()

DofWSet()

TempSet()

SetHys()

TAlarm1Set()

TAlarm2Set()

PasswordSet()

PhoneSet()

PhoneTest()

UIMenu()

UIMain()

KeyPend()

TimePend()

RingPend()

DTMFRing()