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How to implement a class-specific request with data out stage with USB device lib v3.4?

Question asked by chen.yu.004 on Jan 2, 2013
I was using the stm32f10x USB device lib 3.4, and with the callback function Class_Data_Setup, class-specific requests with data in stage(from MCU to PC) can be implemented, but how to implement class-specific requests with data out stage, such as Set_Report request of HID?

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