有關(guān)IOCTL_CHANGER_MOVE_MEDIUM參數(shù)的問(wèn)題

wangzaixieshi

Windows平臺(tái)下，操作機(jī)械臂。

我用DeviceIoControl函數(shù)，選dwIoControlCode為IOCTL_CHANGER_MOVE_MEDIUM。

當(dāng)中涉及到多個(gè)CHANGER_ELEMENT結(jié)構(gòu)體，該結(jié)構(gòu)體中又包含一個(gè)ELEMENT_TYPE結(jié)構(gòu)體。
我想問(wèn)下如何對(duì)這個(gè)ELEMENT_TYPE結(jié)構(gòu)體初始化或者用什么方法能給這個(gè)結(jié)構(gòu)體賦初始值？

sun_up

Here is the elemenet type list:
typedef enum _ELEMENT_TYPE {
  AllElements,
  ChangerTransport,
  ChangerSlot,
  ChangerIEPort,
  ChangerDrive,
  ChangerDoor,
  ChangerKeypad
} ELEMENT_TYPE, *PELEMENT_TYPE;

How to set the element type up to the tape library setup.
For example, transport(robot) address is 0, 1, 2. You can pick up any one from 0 to 2.
  CHANGER_MOVE_MEDIUM ch_mm;

  ch_mm.Transport.ElementAddress = 0;
  ch_mm.Transport.ElementType = ChangerTransport;

The storage slot addresses are in the range of 1024h -- 3000h.
The Import/export slot addresses are from 301h -- 316h.

You want to move the cartridge from 301h to 1024h
  ch_mm.Source.ElementAddress = 0x301;
  ch_mm.Source.ElementType = ChangerIEPort;

  ch_mm.Destination.ElementAddress = 0x1024;
  ch_mm.Destination.ElementType = ChangerSlot;

So, your programer must have the library inventory data first so that you can determine the address is belonged to what element type.