DEVICE_PROP Device_Property =
{
Joystick_init,
Joystick_Reset,
Joystick_Status_In,
Joystick_Status_Out,
Joystick_Data_Setup,
Joystick_NoData_Setup,
Joystick_Get_Interface_Setting,
Joystick_GetDeviceDescriptor,
Joystick_GetConfigDescriptor,
Joystick_GetStringDescriptor,
0,
0x40 /*MAX PACKET SIZE*/
};
这个里面调用了很多函数
比如Joystick_Data_Setup调用
Joystick_Data_Setup(u8 RequestNo)
{
u8 *(*CopyRoutine)(u16);
CopyRoutine = NULL;
if ((RequestNo == GET_DESCRIPTOR)
&& (Type_Recipient == (STANDARD_REQUEST | INTERFACE_RECIPIENT))
&& (pInformation->USBwIndex0 == 0))
{
if (pInformation->USBwValue1 == REPORT_DESCRIPTOR)
{
CopyRoutine = Joystick_GetReportDescriptor;
}
else if (pInformation->USBwValue1 == HID_DESCRIPTOR_TYPE)
{
CopyRoutine = Joystick_GetHIDDescriptor;
}
} /* End of GET_DESCRIPTOR */
/*** GET_PROTOCOL ***/
else if ((Type_Recipient == (CLASS_REQUEST | INTERFACE_RECIPIENT))
&& RequestNo == GET_PROTOCOL)
{
CopyRoutine = Joystick_GetProtocolValue;
}
if (CopyRoutine == NULL)
{
return USB_UNSUPPORT;
}
pInformation->Ctrl_Info.CopyData = CopyRoutine;
pInformation->Ctrl_Info.Usb_wOffset = 0;
(*CopyRoutine)(0);
return USB_SUCCESS;
}
但是我怎么也不明白 调用的这个函数的参数在哪里给过值
Joystick_Data_Setup(u8 RequestNo)里面的RequestNo
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