在ABAP中从mscomm读取数据 [英] Reading data from mscomm in ABAP

问题描述

我正在尝试 通过MSCOMM32 对象.

I'm trying to read data sent from serial port via MSCOMM32 object.

我得到的是##.

首先我将十六进制转换为字符串并发送到 COMM 端口:

First I convert hex into string and send to COMM port:

DATA : xSTX TYPE xstring VALUE '02'.
DATA : sSTX TYPE string.

CALL FUNCTION 'HR_KR_XSTRING_TO_STRING'
EXPORTING
 in_xstring = xSTX
 IMPORTING
 out_string = sSTX. "this value is now # but still understood by the device

SET PROPERTY OF O_OBJ 'Output' =  sSTX .

然后连接到串口的机器会给出响应.我使用以下代码读取数据:

And then the machine attached to serial port will give a response. I read the data using this code below:

  Data strmsg Type string.
  DO 10 TIMES.
    GET PROPERTY OF o_obj 'InBufferCount' = wa_buffer.
    If wa_buffer > 0.
        GET PROPERTY OF o_obj 'Input' =  strmsg.
    Endif.
  ENDDO.

我可以使用监控设备看到响应，但我得到的输入只有 ##，当我将此 ## 转换为十六进制时，我会得到 0202.

I can see the response using monitoring device but the input that I get was only ##, when I convert this ## into hex then I would get 0202.

我已经正确地进行了所有设置，因为我能够发送数据并激活机器，但我仍然无法翻译响应.

I already did all the settings correctly because I'm able to send the data and activate the machine, but I'm still not able to translate the response.

我有一个使用 .NET 的旧软件，它可以使用相同的响应数据完美读取数据.

I have a legacy software using .NET and it can read the data perfectly, using the same response data.

另一个奇怪的事情是 sSTX 的值是 # 但我并没有太在意它，因为它被设备理解了.

Another strange thing was the value of sSTX is # but I don't bother it too much because it's understood by the device.

预期输出是(取自监视器)

The expected output is (taken from monitor)

<ACK><STX><STX><NUL><SOH>01000000000000000000000000                       P3                                                                                                                                                    <ETX>

但我得到的只是 060202

But all I get was 060202 which is

<ACK><STX><STX> 

不知何故文本正文不在同一个空间中.

somehow the text body is not in the same space.

我知道答案就在那里，但我好几个星期都想不通.很奇怪.

I know the answer is there but I just can't figure it out for weeks. very weird.

推荐答案

我找到了答案.

将 inputlen 属性设置为 4.解决问题.

set the inputlen property to 4. solve the problem.

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