Re: NULL PNP Serial Driver???
From: Doron Holan [MS] (doronh_at_nospam.microsoft.com)
Date: 04/23/04
- Next message: Doron Holan [MS]: "Re: Is this the correct procedure to a non pnp device when when win 2000 shut down?"
- Previous message: Doron Holan [MS]: "Re: What do ZwXXX and RtlXXX functions link against?"
- In reply to: Frank Schwab: "NULL PNP Serial Driver???"
- Messages sorted by: [ date ] [ thread ]
Date: Thu, 22 Apr 2004 21:57:17 -0700
at least on win2k and beyond, yes you can create an INF which installs a
NULL service/driver on the device. If the driver doesn't explicitly open
the port, someone else, like the application, can still open the port. Just
because the device was enumerated, doesn't mean the port is open. all it
means is that something was found on the port. if your customers can live
with a !'e out device in device manager, you don't have to write an INF at
all...
d
-- This posting is provided "AS IS" with no warranties, and confers no rights. Please reply to newsgroups only. "Frank Schwab" <FSchwab@GTCOCalcomp.com> wrote in message news:9172FB57-5F90-406F-9790-DBBF6FB52215@microsoft.com... > We have been building serial devices for many years. None have been plug-and-play compliant, because many of our customers have written support code into their applications rather than using drivers. Don't laugh, but some of these programs have been continuously supported since the DOS days. In many cases, the code to talk to the tablets was written 10 or 15 years ago, and the programmers who did it have left - and nobody wants to touch it. > > Our next generation devices will have both USB (HID) and Serial interfaces, and the plan is to make the serial interface Plug-N-Play. For about half of our customers, this will work well because they will use our drivers to talk to the devices. For the other half, however, the half that simply opens a COM port and directly controls our devices, we have a problem - the "Found New Hardware Wizard". > > Of course, the dinosaurs who are doing things themselves are using just about every version of Windows you can imagine. When my paycheck relies on shipping product out the door, I can't very well tell them "Well, if you're not going to run a supported OS, and use our supported driver, we're not gonna sell product to you". There are just too many of them. > > So, my question is, > Is it possible to satisfy PNP enumeration (and gets rid of the wizard) using an inf file which doesn't install a driver? > Is it possible to write a driver which satisfies PNP enumeration but leaves the port open, either by exiting immediately or simply closing the port? > > Offers to implement non-trivial solutions will be seriously considered... > > /frank >
- Next message: Doron Holan [MS]: "Re: Is this the correct procedure to a non pnp device when when win 2000 shut down?"
- Previous message: Doron Holan [MS]: "Re: What do ZwXXX and RtlXXX functions link against?"
- In reply to: Frank Schwab: "NULL PNP Serial Driver???"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
