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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