Biometric Access Control System y Designed By: Paolo Bruno, Bilal - PowerPoint PPT Presentation

Biometric Access Control System y Designed By: Paolo Bruno, Bilal Ahmed Senior Design Summer 2009

Serial Communication 8 data bits, 1 stop bit, and no parity Uart1 TTL Uart0 RS-232 Uart0 TTL Uart0 TTL Uart1 TTL

Fingerprint Module Serial Protocol *NOT *NOTE * E * Header Checks Header Checksum = = Command Command + + Param1 + Param1 + Param2 + Param2 + Data Size Data Size + + Erro Error Cod Erro Error Cod Code ode

Ex. Communication Between Fingerprint Module and AVR Request Request Connection Comma Connection Command – d – Determines if etermines if you are you are connected to connected to the the FIM3 FIM304 040 Command Command 0x01 Command Command 0x01 Parameter 1 Parameter 1 X Parameter 1 Parameter 1 Result Succeeded Parameter 2 Parameter 2 X Parameter 2 Parameter 2 Fingerprint Count Data Data Size Size 0 Data Data Size Size 0 Error Code Error Code X Error Code Error Code Error Code HDR HDR Checksu HDR HDR Checks Checksum Checksum 0x01 0x01 HDR Checks HDR HDR Checksu HDR Checksum Checksum N / A N / A * NOTE OTE * When When a command ommand packet packet is is sent sent to to the the fingerprint ingerprint module module it it returns returns an acknowledgement cknowledgement packet packet that that informs informs you whether you you you whether whether or whether or or not or not not the not the the command the command command sent command sent sent was sent was was successful was successful successful. successful.

The Structure of a Command Packet Request Request Connection Command onnection Command Start Byte Start Byte Data Data Size i ze 0 00 0x00 0x00 0 00 0x00 0x00 0x00 0x00 0x7E 0x00 Command Command Error Code Error Code 0x00 0x00 0x00 0x00 0x00 0x00 0x01 0x00 Parameter 1 Parameter 1 HDR HDR Checksu Checksum 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x01 Parameter 2 Parameter 2 0x00 0 00 0x00 0x00 0x00

AVR Programming Basic Framework (1) Enable Rx / Tx on Uart1 and Uart0. (2) Set Baud Rate by setting up UBRR registers. (3) Decide between polling and using interrupts? Interrupts Chosen. (4) Decide on terminal interface or GUI using Visual C#. Could not implement a GUI due to shortage of time. (5) (5) Store Fingerprint Module (FIM3040LV) Commands in EEPROM. Store Fingerprint Module (FIM3040LV) Commands in EEPROM. (6) Read and learn FIM3040 communications protocol manual. (7) ( ) Buffer the incoming FIM3040 packets properly! Compare command packet with u e t e co g M30 0 pac ets p ope y Co pa e co a d pac et w t acknowledgement packet before proceeding. (8) Make sure you have an updated version of the communication protocol. The fingerprint module had many quirks that needed to be figured out. Often times the communication protocol had protocol had wrong information and bad English! rong information and bad English!

PCB Advanced Circuits Barebone

Analog Security Breach Alarm An alarm was designed as a security measure, after several l d d l • unsuccessful authentication attempts the alarm becomes active. Oscillator and NE555 timer were used to generate signals at O ill t d NE555 ti d t t i l t • 500MHZ. Mixer Analyzer circuit was designed to select certain output based Mixer Analyzer circuit was designed to select certain output based • on the input voltage using the N-Channel MOSFETs (IRF510). With the use of diodes non ideal OpAmp can produce a steady With the use of diodes non-ideal OpAmp can produce a steady • • state oscillation. Output of the oscillator is fed into a mixer amplifier Output of the oscillator is fed into a mixer amplifier. •

PCB Security Breach Alarm

Finished Product

Possible Improvement Possible Improvement • One of the possible improvement is to design One of the possible improvement is to design the Access system with keypad as an alternate entry solution entry solution • Design GUI to make it easy to use interface