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External
Since: Jun 26, 2006
Posts: 18
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(Msg. 1) Posted: Sun Feb 17, 2008 8:42 pm
Post subject: USB connection via I/O Kit functions
Archived from groups: comp>sys>mac>programmer>help (more info?)
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I want to connect to a USB device via the I/O Kit functions.
Unfortunately, this does not work.
Actually my device has got basically a serial interface with an internal
USB - RS232 converter from Prolific. When using the BSD functions and
the driver /dev/cu.usbserial everything works when I set the
communication parameters correctly. My device needs XON/XOFF handshaking
and a start and stop bit. Furthermore, the data is 8 bit.
How do I tell the IOUSBInterfaceInterface environment that I need the
before mentioned parameters?
Hartwig |
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External
Since: Apr 25, 2004
Posts: 694
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(Msg. 2) Posted: Mon Feb 18, 2008 1:57 pm
Post subject: Re: USB connection via I/O Kit functions [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In article , H
wrote:
> I want to connect to a USB device via the I/O Kit functions.
> Unfortunately, this does not work.
>
> Actually my device has got basically a serial interface with an internal
> USB - RS232 converter from Prolific. When using the BSD functions and
> the driver /dev/cu.usbserial everything works when I set the
> communication parameters correctly. My device needs XON/XOFF handshaking
> and a start and stop bit. Furthermore, the data is 8 bit.
> How do I tell the IOUSBInterfaceInterface environment that I need the
> before mentioned parameters?
Why do you need to use IOKit functions? Why not use the IOKit functions
to get the POSIX name of the device, and manipulate the device from then
on using POSIX calls. Use ioctl() to set the handshaking and bytesize. |
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External
Since: Jun 26, 2006
Posts: 18
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(Msg. 3) Posted: Mon Feb 18, 2008 9:34 pm
Post subject: Re: USB connection via I/O Kit functions [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In article ,
David Phillip Oster wrote:
> In article , H
> wrote:
>
> > I want to connect to a USB device via the I/O Kit functions.
> > Unfortunately, this does not work.
> >
> > Actually my device has got basically a serial interface with an internal
> > USB - RS232 converter from Prolific. When using the BSD functions and
> > the driver /dev/cu.usbserial everything works when I set the
> > communication parameters correctly. My device needs XON/XOFF handshaking
> > and a start and stop bit. Furthermore, the data is 8 bit.
> > How do I tell the IOUSBInterfaceInterface environment that I need the
> > before mentioned parameters?
>
> Why do you need to use IOKit functions? Why not use the IOKit functions
> to get the POSIX name of the device, and manipulate the device from then
> on using POSIX calls. Use ioctl() to set the handshaking and bytesize.
I will have to do so but I prefer the IOKit interface style. In addition
to this - I would call it matter of taste, I get more information about
the attached device from the IOKit functions than from POSIX calls.
OK, I could mix both styles but this is something I personally do not
like at all.
Hartwig >> Stay informed about: USB connection via I/O Kit functions |
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External
Since: Apr 25, 2004
Posts: 694
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(Msg. 4) Posted: Mon Feb 18, 2008 9:34 pm
Post subject: Re: USB connection via I/O Kit functions [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In article , H
wrote:
> In article ,
> David Phillip Oster wrote:
>
> > In article , H
> > wrote:
> >
> > > I want to connect to a USB device via the I/O Kit functions.
> > > Unfortunately, this does not work.
> > >
> > > Actually my device has got basically a serial interface with an internal
> > > USB - RS232 converter from Prolific. When using the BSD functions and
> > > the driver /dev/cu.usbserial everything works when I set the
> > > communication parameters correctly. My device needs XON/XOFF handshaking
> > > and a start and stop bit. Furthermore, the data is 8 bit.
> > > How do I tell the IOUSBInterfaceInterface environment that I need the
> > > before mentioned parameters?
> >
> > Why do you need to use IOKit functions? Why not use the IOKit functions
> > to get the POSIX name of the device, and manipulate the device from then
> > on using POSIX calls. Use ioctl() to set the handshaking and bytesize.
>
> I will have to do so but I prefer the IOKit interface style. In addition
> to this - I would call it matter of taste, I get more information about
> the attached device from the IOKit functions than from POSIX calls.
> OK, I could mix both styles but this is something I personally do not
> like at all.
Quoting:
http://developer.apple.com/documentation/DeviceDrivers/Conceptual/Work...WSerial
"To communicate with a serial device from your Mac OS X application, use I/O Kit functions to obtain a path to the device file for that device. Then, implement traditional UNIX serial port access using the POSIX termios API. Your application can read and write data using the device file." >> Stay informed about: USB connection via I/O Kit functions |
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