mirror of
https://github.com/stargieg/bacnet-stack
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46 lines
1.5 KiB
Plaintext
46 lines
1.5 KiB
Plaintext
This port was originally done with the Atmel ATmega168
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I used the following tools:
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1. The WinAVR compiler avr-gcc (GCC) 4.1.2 (WinAVR 20070525)
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and tools from <http://winavr.sourceforge.net/>, hints and
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sample code from <http://www.avrfreaks.net/> and
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<http://savannah.gnu.org/projects/avr-libc/>.
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"avr-binutils, avr-gcc, and avr-libc form the heart of the
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Free Software toolchain for the Atmel AVR microcontrollers."
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2. AVR Studio 4 from Atmel <http://atmel.com/>
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The hardware is expected to utilize the signals as defined
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in the spreadsheet hardware.ods (OpenOffice.org calc).
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Attach a DS75176 RS-485 transceiver (or similar) to the USART.
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DS75176 ATmega168
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------ ---------
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RO RXD
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/RE --choice of I/O
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DE --choice of I/O
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DI TXD
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GND GND
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DO --to RS-485 wire
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DO --to RS-485 wire
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+5V From 5V Regulator
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The makefile allows you to build a simple server.
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dlmstp is the datalink layer for MS/TP over RS-485.
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This project uses an MS/TP Slave Node.
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I used the makefile from the command line on Windows:
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C:\code\bacnet-stack\ports\atmega168> make clean all
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The BACnet Capabilities include ReadProperty support.
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The BACnet objects include only a Device object.
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All required object properties can be retrieved using ReadProperty.
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With full optimization, the statistics on the demo are:
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avr-gcc (GCC) 4.2.2 (WinAVR 20071221rc1)
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Device: atmega168
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Program: 8734 bytes (53.3% Full)
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Data: 254 bytes (24.8% Full) (does not include CStack)
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Hopefully you find this code useful!
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Steve Karg <skarg@users.sourceforge.net>
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