Hi,
I would like to be able to construct composite USB device encapsulating N serial ports. Having used CDC/ACM class and some examples from Keil (Keil\ARM\Boards\Keil\MCB2300\USBCDC) for LPC2386 adopted to my target board, it is not a problem to have one port app working.
Also after updating the descriptor to associate Comm and Data classes into single IAD the device still seems to work ok (WinXP SP3, usbser.sys 5.1.2600.5512, uspccgp 5.1.2600.5585).
When I duplicate whole IAD section once more in the config, the device still operates and two IADs are recognized (USBlyzer SW), but only one serial port instance is created.
Is there a need to update also the .inf file (Keil\ARM\Boards\Keil\MCB2300\USBCDC\mcb2300-vcom.inf) to be able to "install multiple drivers" for each function? Regarding one of sources, I appended an MI_00, MI_01 to items on [DeviceList], cleared the device manager, replugged the device, but windows refuses "updated" inf.
Maybe wrong descriptors, maybe wrong inf (any resources to get oriented in this magic?), maybe both.
Any help/advice/tips appreciated. Thanks.
Resources I used: www.usb.org/.../viewtopic.php www.usb.org/.../viewtopic.php www.cygnal.org/.../001050.html www.cygnal.org/.../001572.html www.techtalkz.com/.../265030-implementing-multiple-cdcs.html