SUPER SWINGIN

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(No Transcript)
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SUPER SWINGIN RADIO CLOCK
A System Software Review
By Toby Dayley April 28, 2005 ETEC 474
Photo courtesy of circuitcity.com Used without
permission
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KERNAL SELECTION
Logo courtesy of Micrium Used without permission
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TASKS PRIORITIES
TASK
PRORITY
Startup
4
Control
5
6
Display
Clock
7
Receiver
8
Logo courtesy of Micrium Used without permission
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STARTUP TASK
Initializes µCOS and creates the other tasks
Priority 4
Period Runs once at startup
Execution Time 50µs
CPU Load Not Considered
6
CONTROL TASK
Controls the swing arm and handles UI
Priority 5
Period 10ms
Execution Time 10µs
CPU Load 0.001
7
DISPLAY TASK
Handle all output to the LEDs
Priority 6
Period 50ms
Execution Time 10ms
CPU Load 0.2
8
CLOCK TASK
Controls the real time clock between
synchronization
Priority 7
Period 1s
Execution Time 100µs
CPU Load 0.0001
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RECEIVER TASK
Decodes the signal from WWVB and controls sync
Priority 8
Period 25ms
Execution Time 100µs
CPU Load 0.004
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TOTAL CPU LOAD
Lmax 0.0010.20.00010.004
Maximum CPU Load 20.51
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MODULES
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DATA FLOW
Switches
S2RC.c
Control Module
TimeDate_key Zone_key Optical_sw
10ms
SwitchInit()
ControlTask()
SW.buffer
SwitchPend()
SW.flag
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DATA FLOW
LED Display
S2RC.c
LED.c
LedZone() LedDate() LedTime() LedMoveCursor() LedD
ispChar() LedClrDisp() LedDispStrg()
LEDs
50ms
DisplayTask()
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DATA FLOW
WWVB Signal
Clock.c
Receiver.c
WWVB Input
25ms
PullTime()
synctime
ReceiverTask()
PullDate()
syncdate
SyncPos.flag
SyncPosPend()