On Sun, Dec 11, 2005 at 12:10:26AM +0100, Joachim Buermann wrote: > Hello, > > I have a problem to detect the right ttyUSBx device, if I connect more than > one of the same type of USB to Serial adapters. > One is a FT232BM (serial uart), the other one a FT245BM (parallel fifo). Both > have the same Vendor (0403) and ProdId (6001) and will be used via the > ftdi_sio module. They differ in their Producer, Manufactor and SerialNumber > information. > > Our compay is using the FT245BM chip to connect our serial dataflow analyser > to a PC via USB. Before starting the analyser, we must transfer 'it's' > firmware to it through the right ttyUSBx. > > To detect the ttyUSBx behind our analyser, I must realize which ttyUSBx is > joined to it. > > A 'cat /proc/bus/usb/devices' shows this: > > T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0 > D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 > P: Vendor=0403 ProdID=6001 Rev= 4.00 > S: Manufacturer=FTDI > S: Product=USB <-> Serial > C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr= 90mA > I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=ftdi_sio > E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms > > T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 3 Spd=12 MxCh= 0 > D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 > P: Vendor=0403 ProdID=6001 Rev= 4.00 > S: Manufacturer=IFTOOLS > S: Product=US232B > S: SerialNumber=0016e10a > C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr= 44mA > I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=ftdi_sio > E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms > E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms > > A 'cat /proc/tty/driver/usbserial' give me this: > > usbserinfo:1.0 driver:v2.0 > 0: module:ftdi_sio name:"FTDI USB Serial Device" vendor:0403 product:6001 > num_ports:1 port:1 path:usb-0000:00:04.2-1 > 1: module:ftdi_sio name:"FTDI USB Serial Device" vendor:0403 product:6001 > num_ports:1 port:1 path:usb-0000:00:04.2-2 > > Here I can see the connected device number 0: or 1: (first column), but > because there exists no informations like producer, manufactor or > serialnumber, I couldn't use it to distinguish between both. > Also '/proc/tty/driver/usbserial' only can read by root and my application > runs with normal user rights. > > I have read the usbdoc and some other usb manuals but found nothing to solve > the problem. > > Is there any libusb call, with it I can detect the joined ttyUSBx. Or some > ioctl command to read the producer and/or manufactor of the USB device behind > it. > > BTW: I'm using debian with a 2.6.13.4 kernel.
Use udev to uniquely name each of the devices, that way you will not have to worry about the order in which they are found. Hope this helps, greg k-h ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ Linux-usb-users@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
