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RE: Re: [ntdev] WriteFile, ReadFile to multiple channels

Doron_HolanDoron_Holan Member - All Emails Posts: 10,499
The uart can be a means to an end. If the data is specialized and only consumed by your app, don't try be complicated (reuse the serial driver, multiple device objects). If you want your data to be treated as a serial port by any app, you need to start down a more complicated path

d

Bent from my phone
________________________________
From: Marion Bond
Sent: ?5/?10/?2015 3:28 PM
To: Windows System Software Devs Interest List
Subject: [ntdev] Re: [ntdev] WriteFile, ReadFile to multiple channels

If these channels are unrelated, then typically you expose two COM ports. The in-box driver takes over and in user mode the application opens either COM1 or COM2 (or whatever numbers get assigned)

If the channels are somehow related, then depending on how that relationship works, there are various options

Sent from Surface Pro

From: Zvi Vered
Sent: ?Sunday?, ?May? ?10?, ?2015 ?1?:?58? ?PM
To: Windows System Software Devs Interest List

Hello,

My device driver handles two UART channels.

The user level driver uses WriteFile, ReadFile to write and read buffers to/from those UARTs.

What is the right (and elegant) way to handle more than one I/O channel like the one I have.

How can I use WriteFile,ReadFile to tell the kernel which channel it should use ?

Best regards,
Z.V

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