Re: Connection to FTDI UM245R chip

Hi Tim,

On Friday 03 August 2007 09:40, Thaens Tim wrote:
> Hi all,
>
> I'm trying to write an application to send and receive data from a PC
> through a FTDI UM245R chip to a hardware board.
> When plug the USB-cable with the chip into my PC, dmesg gives me the
> following information:
>
> usb 1-2: new full speed USB device using ohci_hcd and address 6
> usb 1-2: configuration #1 chosen from 1 choice
> ftdi_sio 1-2:1.0: FTDI USB Serial Device converter detected
> drivers/usb/serial/ftdi_sio.c: Detected FT232BM
> usb 1-2: FTDI USB Serial Device converter now attached to ttyUSB0
> usb 1-2: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets
> config #1
> ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from
> ttyUSB0
> ftdi_sio 1-2:1.0: device disconnected
>
> I have searched the device description on the internet and found this:
>
> Device is used to communicate with 8-bit MCU. it provides serial
> interface to the MCU via USB bus. From the OSes side USB device is seen
> as serail port (/dev/ttyUSB0). You need USB support, usb serial
> converter support and ftdi serial conv. support.
>
> So I think I should connect to /dev/ttyUSB0, but that 'file' doesn't
> exist. When I use USBview, I get the following information:

[snip]

Your problem comes from brltty which somehow takes control of the device. I 
can't remember exactly how to solve it though, but googling should help.

Laurent Pinchart

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