Re: Serial port through USB help
Re: Serial port through USB help
- Subject: Re: Serial port through USB help
- From: Vince Ackerman <email@hidden>
- Date: Mon, 7 May 2007 20:04:02 -0700
My apologies for my question not being Cocoa specific. I'm writing
it in Cocoa but didn't know there was a specific group for this.
Despite that, several of you have offered me insight as to where to
look. Thanks all for the help in getting me started in the right
direction.
Vince
On May 7, 2007, at 18:01, Jeffrey J. Early wrote:
You probably just need to write code to access a serial port. The
drivers
for the USB to Serial device typically just make it look like an
ordinary
serial port.
Check out the sample code here:
http://developer.apple.com/samplecode/SerialPortSample/index.html
You should see the serial port show up in your "/dev" folder -- it
will
either be labeled with the prefix "cu." or "tty.". I think the
sample code I
linked to above actually runs through this.
on 5/7/07 5:48 PM, Vince Ackerman at email@hidden wrote:
My project in a nutshell: I need to control a Pan Tilt Zoom camera
through the USB port. I've got a USB to Serial RS485 device with a
software driver. I plan on controlling the device with 2 wire Pelco
D protocol. I'm a Newbie so pardon the dumb questions.
I've been doing a lot of reading of the Apple Doc's but seem to be
going around in a circle. I'm a bit unclear on where to start: Do I
need to look into writing code that accesses the USB port or since
the USB to serial device is handling the conversion to serial, do I
stay with just coding to write out a serial port and pretend the
serial port is already there...
I'm serial, I don't know where to start.
Could one of you kind sirs please give me a direction to look to get
started? I have some C code to do the Pelco-D protocol but not sure
how to access the pipe out the USB/Serial port.
Thanks
Vince
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