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| Author | Topic:em50 and linux | 1085 Views |
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em50 and linux
26 October 2011 at 11:10am
Hello,
I'm trying to install the em50 under Linux.
I managed to load the ftdi_sio module with the folowing parameters:
# modprobe ftdi_sio vendor=0x10c4 product=0x8414The ftdi driver version is 1.6.0.
The output when I connect the device is:
Oct 26 14:42:48 vaio-nrj kernel: [ 727.419434] USB Serial support registered for FTDI USB Serial Device
Oct 26 14:42:48 vaio-nrj kernel: [ 727.419820] ftdi_sio 5-1:1.0: FTDI USB Serial Device converter detected
Oct 26 14:42:48 vaio-nrj kernel: [ 727.419997] usb 5-1: Detected SIO
Oct 26 14:42:48 vaio-nrj kernel: [ 727.420044] usb 5-1: Number of endpoints 2
Oct 26 14:42:48 vaio-nrj kernel: [ 727.420051] usb 5-1: Endpoint 1 MaxPacketSize 64
Oct 26 14:42:48 vaio-nrj kernel: [ 727.420056] usb 5-1: Endpoint 2 MaxPacketSize 64
Oct 26 14:42:48 vaio-nrj kernel: [ 727.420061] usb 5-1: Setting MaxPacketSize 64
Oct 26 14:42:53 vaio-nrj kernel: [ 732.422600] ftdi_sio ttyUSB0: Unable to read latency timer: -110
Oct 26 14:42:53 vaio-nrj kernel: [ 732.427485] usb 5-1: FTDI USB Serial Device converter now attached to ttyUSB0
Oct 26 14:42:53 vaio-nrj kernel: [ 732.427532] usbcore: registered new interface driver ftdi_sio
Oct 26 14:42:53 vaio-nrj kernel: [ 732.427537] ftdi_sio: v1.6.0:USB FTDI Serial Converters DriverAnd when I try to open the serial ttyUSB0 for example with minicom, the output is:
Oct 26 14:42:53 vaio-nrj kernel: [ 732.516269] ftdi_sio ttyUSB0: ftdi_set_termios urb failed to set baudrate
Oct 26 14:42:53 vaio-nrj kernel: [ 732.520312] ftdi_sio ttyUSB0: ftdi_set_termios FAILED to set databits/stopbits/parity
Oct 26 14:42:53 vaio-nrj kernel: [ 732.523280] ftdi_sio ttyUSB0: ftdi_set_termios urb failed to set baudrate
Oct 26 14:42:53 vaio-nrj kernel: [ 732.526275] ftdi_sio ttyUSB0: urb failed to set to xon/xoff flow control
Oct 26 14:42:53 vaio-nrj kernel: [ 732.529260] ftdi_sio ttyUSB0: Unable to write latency timer: -71
Oct 26 14:42:53 vaio-nrj kernel: [ 732.532280] ftdi_sio ttyUSB0: ftdi_set_termios FAILED to set databits/stopbits/parity
Oct 26 14:42:53 vaio-nrj kernel: [ 732.535283] ftdi_sio ttyUSB0: ftdi_set_termios error from disable flowcontrol urb
Oct 26 14:42:53 vaio-nrj kernel: [ 732.539259] ftdi_sio ttyUSB0: urb failed to set to xon/xoff flow control
Oct 26 14:42:53 vaio-nrj kernel: [ 732.540214] hub 5-0:1.0: port 1 disabled by hub (EMI?), re-enabling...
Oct 26 14:42:53 vaio-nrj kernel: [ 732.540222] usb 5-1: USB disconnect, address 3
Oct 26 14:42:53 vaio-nrj kernel: [ 732.545046] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
Oct 26 14:42:53 vaio-nrj kernel: [ 732.545071] ftdi_sio 5-1:1.0: device disconnectedI tried with Ubuntu, Centos, Slack, Suse ... no success.
Is there any way for talking to the device in serial mode under Linux ?
Thank you,
Alex -
Re: em50 and linux
27 October 2011 at 4:26am
Solved, at least the serial communication problem.
The driver is not ftdi_sio. It is cp210x.
The standard Linux kernel does include this driver but it does not recognize the device.
After trying with the latest driver from: http://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx , http://www.silabs.com/Support%20Documents/Software/cp210x-3.1.0.tar.gz wich is full of bugs, I returned to the one installed in the kernel.
The one in the kernel is version 0.9 but after modifing the source of cp210x.c and adding:
{ USB_DEVICE(0x10C4, 0x8414) }, /* Decagon EM50 serial */
on line 105, and recompiled the module, it started working.I can communicate with the device on port /dev/ttyUSB0.
The OS that I use is CentOS 6.0 with kernel 2.6.32.Have fun,
Alex
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