Help¶

IAD should not be required for non-composite CDC ACM device, but Windows 7 fails to properly enumerate without it. Enable if you want CDC ACM to work with Windows 7.

Direct dependencies¶

USB_CDC_ACM && USB_DEVICE_STACK

(Includes any dependencies from ifs and menus.)

Default¶

y

Kconfig definition¶

At <Zephyr>/subsys/usb/class/Kconfig:47

Included via <Zephyr>/Kconfig:8 → <Zephyr>/Kconfig.zephyr:34 → <Zephyr>/subsys/Kconfig:45 → <Zephyr>/subsys/usb/Kconfig:144

Menu path: (Top) → Sub Systems and OS Services → USB Device Support → USB CDC ACM Device Class Driver

config CDC_ACM_IAD
    bool "Force using Interface Association Descriptor"
    default y
    depends on USB_CDC_ACM && USB_DEVICE_STACK
    help
      IAD should not be required for non-composite CDC ACM device,
      but Windows 7 fails to properly enumerate without it.
      Enable if you want CDC ACM to work with Windows 7.

(The ‘depends on’ condition includes propagated dependencies from ifs and menus.)