STM32 USB HOST 驱动 ch340

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天臆弄人发布时间：2019-7-4 11:34

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初始化部分，加上CDC 回调，
主要在枚举不通过，CH340是0XFF的类，标准的是CDC 类为0x02,然后就是修改
#define  CH340X_CLASS 0xff
if((pphost->device_prop.Itf_Desc[0].bInterfaceClass  == CH340X_CLASS)&& \
(pphost->device_prop.Itf_Desc[0].bInterfaceSubClass  == 0x01) && \
   (pphost->device_prop.Itf_Desc[0].bInterfaceProtocol == 0x02)){

ret = 0x02;
      /*Collect the notification endpoint address and length*/
CDC_Machine.CDC_CommItf.ep_addr = pphost->device_prop.Ep_Desc[0][2].bEndpointAddress;
CDC_Machine.CDC_CommItf.length  = pphost->device_prop.Ep_Desc[0][2].wMaxPacketSize;

if(pphost->device_prop.Ep_Desc[0][2].bEndpointAddress & 0x80)
{
   CDC_Machine.CDC_CommItf.notificationEp =\
      (pphost->device_prop.Ep_Desc[0][2].bEndpointAddress);
}