[Wine] Win app under wine that use RS-485
martin at gregorie.org
Wed Mar 9 15:05:28 CST 2011
On Wed, 2011-03-09 at 12:04 -0700, James McKenzie wrote:
> On Wed, Mar 9, 2011 at 11:24 AM, aleroot <wineforum-user at winehq.org> wrote:
> > No, in /dev/ttyS i have only the 4 serial port (rs-232) on the machine ?
> > Should Linux allocate /dev/ttySX for RS-485 ? What device name under /dev should i have ?
> It should. It should by the next ttyS device (ttyS4 if my memory serves me.)
> Are you using a special board/device for RS-485 communications? Does
> this device have a Linux driver? Wine cannot run Windows drivers
> because how and where drivers are loaded in the operating system
Disclaimer. I've never used RS-485 but some quick research shows the
- RS-485 is a way of linking a number of devices on a multi-drop cable,
so the driver must explicitly switch the transmit side of each node
on and off. Devices are referred to as nodes.
- RS-485 is a master/slave setup with the master node controlling
the other (slave) nodes and controlling which node can transmit.
- RS-485 can be full or half duplex. This is a physical choice:
half-duplex uses a single twisted pair while full duplex needs two
- RS-485 can be, and often is, implemented with standard UARTs, e.g.
an 8250 or 16550. The hardware of some RS-232 serial port adapter
cards is switchable to RS-485 with a jumper or you can use RS-485
- Linux *may* set up RS-485 ports as /dev/ttyS[0-9]. What it does would
depend on whether the kernel checks whether a serial port is S-232 or
RS-485: I don't know what it does.
- there is no such thing as an RS-485 transmission protocol. RS-485
only defines the physical link layer.
- each node on a multi-drop line has a unique address and any node can
send data to any other combination of nodes once the master has given
it permission to send.
- Linux RS-485 drivers are available.
Your distro and/or the people who implemented the communication protocol
your app is using should know what adapter cards and drivers are
available, so ask them.
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