這是幾年前做的了，一直都不想分享出來，後來想想為了能夠給大家點想法，獻出來了。。。

這是一個電腦讀稱的方法，一般用COMM口連線的電子裝置都可參考。

如果是對串列埠引數不確定的，可以網上找個串列埠測試工具，輕鬆測出串列埠引數

網上搜索MSCOMM32.OCX

1.將上面的MSCOMM32.OCX儲存到系統目錄下C:\Windows\SysWOW64\MSCOMM32.OCX

然後註冊：REGSVR32 C:\Windows\SysWOW64\MSCOMM32.OCX

2．修改登錄檔：

REGEDIT

在HKEY_CLASSES_ROOT\Licenses下建一項：

4250E830-6AC2-11cf-8ADB-00AA00C00905

修改數值資料：kjljvjjjoquqmjjjvpqqkqmqykypoqjquoun

重新啟動電腦，這樣COMM元件就能使用了

以上是在PC上配置的資料。

登陸GUI

T-code: SOLE

新建條目：

OLE 應用程式         MSCOMMLIB.MSCOMM.1

版本號

類標識               {648A5600-2C6E-101B-82B6-000000000014}

CLSID 庫型別

OLE 物件名

型別資訊鍵值

包含程式

語言

檢查許可權

文字

FUNCTION z_bc_get_balance.
*"----------------------------------------------------------------------
 

*"*"本地介面：
*"  IMPORTING
*"     REFERENCE(MODE) TYPE  I DEFAULT 0
*"     REFERENCE(COMMPORT) TYPE  I DEFAULT 1
*"     VALUE(SETTINGS) TYPE  C DEFAULT '1200,N,8,1'
*"     REFERENCE(I_INPUT) TYPE  C OPTIONAL
*"  EXPORTING
*"     REFERENCE(E_OUTPUT) TYPE  C
*"  EXCEPTIONS
*"      NO_CREATE_OBJECT
*"----------------------------------------------------------------------
 


  TYPE-POOLS:sabc.
  INCLUDE ole2incl.
  DATA pos TYPE i.
  CLEAR: pos,balance,value,e_output.
  PERFORM prm_get_settings CHANGING settings.
*  WAIT UP TO 3 SECONDS.
  PERFORM prm_init.
  PERFORM prm_open_port USING commport settings.
  IF mode = 0."讀取串列埠資料
    PERFORM prm_read_port CHANGING e_output.
  ELSEIF mode = 1."寫串列埠資料
    PERFORM prm_write_port USING i_input CHANGING e_output.
  ENDIF.
  PERFORM prm_final.
  SEARCH balance FOR '+'.
  IF sy-subrc = 0.
    pos = sy-fdpos.
    SHIFT balance BY ( pos + 1 ) PLACES.
  ENDIF.
  SEARCH balance FOR 'g'.
  IF sy-subrc = 0.
    pos = sy-fdpos.
    balance = balance+0(pos).
    CONDENSE balance NO-GAPS.
    e_output = balance.
  ENDIF.
  COMMIT WORK
ENDFUNCTION.



此塊為配置介面型別模組(自建表用IP地址來配置相應的comm口引數)
*****************************************************************************
FORM prm_get_settings  CHANGING p_settings.
  DATA addr TYPE ni_nodeaddr.
  CLEAR addr.
  CALL FUNCTION 'TH_USER_INFO'
    IMPORTING
      addrstr = addr.
  SELECT SINGLE setting INTO p_settings FROM zbctaddr WHERE addr = addr.
  IF sy-subrc = 0.
    CLEAR addr.
  ENDIF.
ENDFORM.                    " PRM_GET_SETTINGS



初始化介面物件
******************************************************************************
FORM prm_init .
  DATA:
    wa_repid LIKE sy-repid.
  CLEAR wa_repid.
  wa_repid = sy-repid.
  CALL FUNCTION 'AUTHORITY_CHECK_OLE'
    EXPORTING
      program          = wa_repid
      activity         = sabc_act_call
      application      = 'MSCOMMLIB.MSCOMM.1'
    EXCEPTIONS
      no_authority     = 1
      activity_unknown = 2
      OTHERS           = 3.
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.
  CREATE OBJECT o_obj 'MSCOMMLib.MSComm.1'.
  IF sy-subrc <> 0.
    RAISE no_create_object.
  ENDIF.
ENDFORM.                    " PRM_INIT


介面開啟
***************************************************************************
FORM prm_open_port  USING commport
                           settings.

  SET PROPERTY OF o_obj 'CommPort' = commport.
  SET PROPERTY OF o_obj 'Settings' = settings.
  SET PROPERTY OF o_obj 'InputLen' = 0.
  SET PROPERTY OF o_obj 'PortOpen' = 1.
ENDFORM.                    " PRM_OPEN_PORT



讀取介面資料：因為介面有快取所以每次讀取時都是去掉前面20次的資料
而且每次讀取的資料都是不完整的，所以需要將多次讀取的資料連線起來，然後擷取
****************************************************************************
FORM prm_read_port  CHANGING e_output.
  DATA:
    wa_buffer TYPE i,
    inde      TYPE i.
  DO 70 TIMES.
     inde = inde + 1.
    GET PROPERTY OF o_obj 'InBufferCount' = wa_buffer.
    IF wa_buffer > 0.
      GET PROPERTY OF o_obj 'Input' = e_output.
      IF inde < 20.
        ELSE.
          CONCATENATE balance e_output INTO balance.
      ENDIF.
    ENDIF.
  ENDDO.
  CLEAR:wa_buffer,inde.
ENDFORM.                    " PRM_READ_PORT



往串列埠寫資料，因為沒有需求所以沒做測試
*********************************************************************
FORM prm_write_port  USING    i_input
                     CHANGING e_output.
  DATA:
    wa_buffer TYPE i.
  SET PROPERTY OF o_obj 'Output' = i_input.
  DO 40 TIMES.
    GET PROPERTY OF o_obj 'InBufferCount' = wa_buffer.
    IF wa_buffer > 0.
      GET PROPERTY OF o_obj 'Input' = e_output.
      EXIT.
    ENDIF.
  ENDDO.
ENDFORM.                    " PRM_WRITE_PORT


讀數結束，關閉串列埠，釋放物件，清空變數
************************************************************************
FORM prm_final .
  SET PROPERTY OF o_obj 'PortOpen' = 0.
  FREE OBJECT o_obj.
  CLEAR o_obj.
  COMMIT WORK.
ENDFORM.                    " PRM_FINAL