Indeed, /usr/share/doc/linux-doc-2.6.*/Documentation/usb/usb-serial.txt.gz: The hid->com adapter can run at a maximum baud of 115200bps. Please note that the device has trouble or is incapable of raising line voltage properly. It will be fine with null modem links, as long as you do not try to link two together without hacking the adapter to set the line high. And I find that lsusb -v idVendor 0x04b4 Cypress Semiconductor Corp. idProduct 0x5500 HID->COM RS232 Adapter ...this device has only a fraction of a volt detectable, and only on one of its nine pins. Nowhere near the +12V and -12V I found on three of the nine pins of a real ttyS0. So maybe there is no hope short of some external power hack, and one should instead see http://pfranc.com/usb/usb.mhtml#Linux ...
Looking at the CDROM sold with the cable, $ strings HidCom.sys|grep ... HIDCOM IOCTL SetRTS HIDCOM IOCTL ClrRTS HIDCOM IOCTL GetDTR-RTS So all along there must be a way to put voltage on the pins, but only on MSWindows, not Linux? The files, if somebody wants me to send them, are CCPORT.SYS HIDCOM.INF HidCom.sys HidComInst.exe RS232????.txt WDMMDMLD.VXD statserial(1) reports a lot of voltages that aren't really there. ...All pointing fingers at the cable. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
