DEMO90121LR
RFID Long Range Demo User Manual
9 Firmware
9.1 Structure
The firmware of the DEMO90121LR handles the RS232 serial communication with a computer as well as the
communication with the MLX90121 RFID reader. It can be illustrated by the following flow chart.
UART
Data reception and
Bios
( Bios.c )
transmission, data
buffering
Common level
USART & Parser
Set of routines to
facilitate parsing of
Library
Protocol oriented command
( Comm.c )
1 st level Parser
( Exec.c )
Device
received data and
sending of data
Application
Application-specific parsers
( Parser.c )
Protocol specific parsers
( Iso15par.c )
direct
command
Library
Inventory
( Iso15ac.c )
Protocol level
Error code interpretation
( ErrorCodes.c )
Common level
Protocol basic
( Iso15.c )
TAG recv. buffer
( IsoX.c )
Platform level
Mlx90121 direct access
( MLX90121.c )
TAG
ATmega8 direct access
( Crt8.c )
390129012104
Rev 003
Page 12 of 19
User Manual
Dec. 2009
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