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[USB] Document composite device with IAD class/subclass/protocol #761

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[USB] Document composite device with IAD class/subclass/protocol #761

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1 change: 1 addition & 0 deletions teensy4/usb_desc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -73,6 +73,7 @@
#define MSB(n) (((n) >> 8) & 255)

#ifdef CDC_IAD_DESCRIPTOR
// DEVICE_CLASS=0xEF, DEVICE_SUBCLASS=0x02 & DEVICE_PROTOCOL=0x01 means composite device with IAD
#ifndef DEVICE_CLASS
#define DEVICE_CLASS 0xEF
#endif
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