RFID Access Control System Lucius Knight. General System Design  Microcontroller  PSoC CY8C29466  24MHz Bus Frequency  Memory Available  32kB FLASH.

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Presentation transcript:

RFID Access Control System Lucius Knight

General System Design  Microcontroller  PSoC CY8C29466  24MHz Bus Frequency  Memory Available  32kB FLASH  2kB RAM  Memory Requirements  System Software ~ 5kB FLASH  Activity Log ~ 25kB FLASH  System Data ~ 250B RAM

Kernel Selection  Time Slice Cyclic Scheduler  10ms Period START Initialize Timer Event Key Scan User Interface RFID Update Time Output Data Update Display No Yes

Initialization  System Initialization  LCD  RFID  Keypad  Period  Only run one time  Execution Time  ~ 100 ms

Time Slice  Sleep timer used for periodic interrupt  Period  10 ms

Keypad Task  Scans for key presses  Period  10 ms (Periodic)  Execution Time  ~ 5 us (max)

User Interface Task  Determines menu state based on user input  Period  100 ms (Periodic)  Execution Time  ~ 1 ms (max)

RFID Task  ID validation  Controls  H-bridge/lock  LED  Buzzer  Period  100 ms (Periodic)  Execution Time  ~ 1 ms (max)

Update Time Task  Calculates current date and time  Period  1 s (Periodic)  Execution Time  ~ 1.5 us (max)

Output Data Task  Sends activity log to PC serial port  Period  10 ms (Sporadic)  Execution Time  ~ 2 ms (max after decomposition)

Update Display Task  Displays current information to LCD  Period  100 ms (Periodic)  Execution Time  ~ 2.5 ms (max)

System CPU Load  L(max) = 5µs/10ms + 1ms/100ms + 1ms/100ms +1.5µs/1s + 2ms/10ms + 2.5ms/100ms  L(max) = 24.6%  L(avg) = 4.6%

Module List Module:Task:Public Functions: SeniorProject.cInitialize Key.c (Cypress API) Key ScanKeyType GetKey(void); UserInterface.cUser InterfaceUIStateType GetState(void); RFID.cRFID Time.cUpdate TimeTimeStruct GetTime(void); void SetTime(TimeStruct NewTime); UART.c (Cypress API) Output Data LCD.c (Cypress API) Update Display

Update Display Task Communications Key Scan Update Time User Interface Update Display Key Time Structure State LCD SeniorProject.cLCD ModuleLCD I/O

Update Time Task Communication User Interface Update Display Time Structure UserInterface.cTime Module

User Interface Task Communication Key Scan User Interface Key Key.cUser Interface Module Keypad Keypad I/O

Output Data Task Communication User Interface Output Data State UserInterface.cOutput Data Module DB9 Serial I/O