[ Please make sure to CC the linux-usb list as well. ] On Tue, Feb 18, 2014 at 02:57:45AM +0100, Magnus wrote: > After plugging in the plexgear adapter into my linux boxes: > Fedora 18, Debian 3.11.0-15-generic #25-Ubuntu and weezy it doesnt > send any commands to the servo controller chip on the other side > of the converter. > > I can open the port /dev/ttyUSB0 and send to it with stty, but not > a beep on the other side. I have also set the tty Baudrate manually to > 2400 but this made no difference. My code does this as well including > setting stopbit parity and so on. First verify that the converter works by connecting it to a serial port on your PC and using a terminal program such as minicom at 115200 baud (and the same port settings including flow control) on both ends. Also make sure you got the wiring right (e.g. use a null-modem cable). > Some data i get from Linux and Plexgear converter follows: > > $ lsmod | grep pl2303 > pl2303 18527 0 > usbserial 38603 1 pl2303 > > > $ lsusb > Bus 005 Device 007: ID 067b:2303 Prolific Technology, Inc. > PL2303 Serial Port > > $ lsusb -v > > Bus 005 Device 007: ID 067b:2303 Prolific Technology, Inc. > PL2303 Serial Port > > Couldn't open device, some information will be missing > (My comment... hmm, but it can read from it ?).. > > Device Descriptor: > bLength 18 > bDescriptorType 1 > bcdUSB 1.10 > bDeviceClass 0 (Defined at Interface level) > bDeviceSubClass 0 > bDeviceProtocol 0 > bMaxPacketSize0 64 > idVendor 0x067b Prolific Technology, Inc. > idProduct 0x2303 PL2303 Serial Port > bcdDevice 3.00 > iManufacturer 1 > iProduct 2 > iSerial 0 > bNumConfigurations 1 > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > wTotalLength 39 > bNumInterfaces 1 > bConfigurationValue 1 > iConfiguration 0 > bmAttributes 0x80 > (Bus Powered) > MaxPower 100mA > Interface Descriptor: > bLength 9 > bDescriptorType 4 > bInterfaceNumber 0 > bAlternateSetting 0 > bNumEndpoints 3 > bInterfaceClass 255 Vendor Specific Class > bInterfaceSubClass 0 > bInterfaceProtocol 0 > iInterface 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x81 EP 1 IN > bmAttributes 3 > Transfer Type Interrupt > Synch Type None > Usage Type Data > wMaxPacketSize 0x000a 1x 10 bytes > bInterval 1 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x02 EP 2 OUT > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 0 > Endpoint Descriptor: > bLength 7 > bDescriptorType 5 > bEndpointAddress 0x83 EP 3 IN > bmAttributes 2 > Transfer Type Bulk > Synch Type None > Usage Type Data > wMaxPacketSize 0x0040 1x 64 bytes > bInterval 0 > > I can code some, but i dont know where to start so any > help on this is highly appreciated. > > When i google to find info on adapters i read that > "bMaxPacketSize0 64" indicates that its a counterfeit product > but i paid 250 Swedish for it and that not very cheap for a > univeristy student i think. This device is likely not a clone, but should be supported by the pl2303 driver either way (at least at 115200 baud). Good luck, Johan -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
