Posted on July 14, 2013 at 11:30 to make a composite device with STM32_USB-Host-Device_Lib_V2.1.0 for stm32f2 and stm32f4 and stm32f105,107 you must do this stages:
1-make your composite device describtore and pass it in GetConfigDescriptor class callback function
2-config your endpoints with DCD_EP_Open and DCD_EP_Close function in Init and DeInit class callback functions
3-use DCD_EP_Flush function for all new endpoints and make Out endpoits Prepare to recive data with DCD_EP_PrepareRx function in Init class callback function
4-config TXn_FIFO_FS_SIZE in usb_conf.h file
-note that for full speed device sum of RX_FIFO_FS_SIZE + TX0_FIFO_FS_SIZE + TX1_FIFO_FS_SIZE +TX2_FIFO_FS_SIZE can not be more than 320 so for example if you have 2 bidirectional
endpoints(1(in and out) and 2(in and out)) other than endpoint0 correct values for RX_FIFO_FS_SIZE,TX0_FIFO_FS_SIZE,TX1_FIFO_FS_SIZE,TX2_FIFO_FS_SIZE are:
#define RX_FIFO_FS_SIZE 128
#define TX0_FIFO_FS_SIZE 64 //max packet size for endpoint0
#define TX1_FIFO_FS_SIZE 64 //max packet size for endpoint1
#define TX2_FIFO_FS_SIZE 64 //max packet size for endpoint2
#define TX3_FIFO_FS_SIZE 0
5-use your DataOut class callback with epnum parameter to manage which endpoint event callback occure
