diff --git a/bacnet-stack/demo/mstpcap/mstpcap.txt b/bacnet-stack/demo/mstpcap/mstpcap.txt index e6562df2..5d3b306f 100644 --- a/bacnet-stack/demo/mstpcap/mstpcap.txt +++ b/bacnet-stack/demo/mstpcap/mstpcap.txt @@ -74,7 +74,9 @@ required to be less than 250ms. Note that the mstpcap tool may not have that good of resolution on Windows, so timing under 50ms may not be accurate. -Note: If you are using FTDI chip in your RS485 converter, you can +==== FTDI chip RS-485 converter 76800 baud tricks ==== + +If you are using FTDI chip in your RS485 converter, you can alias an existing baud rate on Windows in the FTDIPORT.INF file in order to acheive non-standard 76800 bps: HKR,,"ConfigData",1,11,00,3F,3F,27,C0,00,00,27,00,00,00,C4,09,00,00,E2,04,00,00,71,02,00,00,38,41,00,00,9C,80,00,00,4E,C0,00,00,34,00,00,00,1A,00,00,00,0D,00,00,00,06,40,00,00,03,80,00,00,00,00,00,00,D0,80,00,00 @@ -85,3 +87,50 @@ hex values actual ----------- --------- 27,C0,00,00 - 76923 bps => divisor=39.125 27,00,00,00 - 76677 bps => divisor=39.000 + +Windows XP (from koby3101) +1) Plug in and locate your USB/RSS85 in Device Manager under ports. Right click +on it and select Properties. Click Details tab and from the drop down select +Device Instance Id. + +2) Click Start, Run and then type regedit. +Follow this path in the registry +HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Enum\FTDIBUS + +Locate the folder that has the same name as what you found earlier Device Instance +Id in step 1. Click on 0000 folder and then Device Parameters. On the right +side you will see ConfigData. Right click and select Modify Binary Data. +Locate the 10 27 which in my case were in 5th and 6th position and replace with +27 C0. + +This will make the RS485 go to 76800 baud (76923 baud) baud when you ask it +to be 300 baud. + +So to capture at 76800 baud type: mstpcap.exe COM2 300 + + +Linux (used with Debian Lenny and Fedora 15) +http://www.connecttech.com/KnowledgeDatabase/kdb309.htm +As root: +chmod 777 /dev/ttyUSB0 - so I can use it later as normal user +setserial /dev/ttyUSB0 –a - this prints current info about the device +/dev/ttyUSB0, Line 0, UART: unknown, Port: 0x0000, IRQ: 0 + Baud_base: 24000000, close_delay: 0, divisor: 0 + closing_wait: infinte + Flags: spd_normal low_latency + +setserial /dev/ttyUSB0 spd_cust - to make custom speed +setserial /dev/ttyUSB0 divisor 312 - 24000000/312 gives 76923 baudrate +setserial /dev/ttyUSB0 –a - just to make sure changes got applied +/dev/ttyUSB0, Line 0, UART: unknown, Port: 0x0000, IRQ: 0 + Baud_base: 24000000, close_delay: 0, divisor: 312 + closing_wait: infinte + Flags: spd_cust low_latency + +Now as normal user running the mstpcap which uses the default 38400 baud it +will actually capture at 76800 baud. (76923) + +Just navigate to bin folder in the project and type: + +./mstpcap +