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📄 中华电脑书库--delphi实现串口通信的常用的方法--在线教程,电脑教程,电脑文摘。.htm

📁 Delphi是一种具有功能强大、简便易用和代码执行速度快等优点的可视化快速应用开发工具
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                <TD class=a14>procedure TFCOMM.FormClose(Sender: TObject; var 
                  Action: TCloseAction); </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>begin </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>comm1.StopComm; </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>end; </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>//自定义发送数据过程 </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>procedure senddata; </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>var </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>i:integer; </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>commflg:boolean; </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>begin </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>viewstring:=‘’ ; </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>commflg:=true; </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>for i:=1 to 6 do </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>begin </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>if not fcomm.comm1.writecommdata(@sbuf[i],1) 
                  then </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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              <TR>
                <TD class=a14>begin </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>commflg:=false; </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
            <TABLE width=620 align=center>
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                <TD class=a14>break; </TD></TR></TBODY></TABLE>
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              <TR>
                <TD class=a14></TD></TR></TBODY></TABLE>
            <TABLE width=620 align=center>
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              <TR>
                <TD class=a14>end; </TD></TR></TBODY></TABLE>
            <TABLE width=620 align=center>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>//发送时字节间的延时 </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>sleep(2); </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>viewstring:=viewstring＋ inttohex(sbuf[i],2)＋‘’ ; 
                  end; </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>viewstring:=‘发送’＋ viewstring; 
            </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>fcomm.memo1.lines.add(viewstring); 
            </TD></TR></TBODY></TABLE>
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              <TR>
                <TD class=a14></TD></TR></TBODY></TABLE>
            <TABLE width=620 align=center>
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                <TD class=a14>fcomm.memo1.lines.add(‘’ ); </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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              <TR>
                <TD class=a14>if not commflg then messagedlg(‘发送失败 !’ 
                  ,mterror,[mbyes],0); </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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              <TR>
                <TD class=a14>end; </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>//发送按钮的点击事件 </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>procedure TFCOMM.Btn_sendClick(Sender: TObject); 
                </TD></TR></TBODY></TABLE>
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              <TBODY>
              <TR>
                <TD class=a14></TD></TR></TBODY></TABLE>
            <TABLE width=620 align=center>
              <TBODY>
              <TR>
                <TD class=a14>begin </TD></TR></TBODY></TABLE>
            <TABLE width=620 align=center>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>sbuf[1]:=byte(＄ f0); //帧头 </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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                <TD class=a14>sbuf[2]:=byte(＄ 01); //命令号 </TD></TR></TBODY></TABLE>
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                <TD class=a14></TD></TR></TBODY></TABLE>
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              <TR>
                <TD class=a14>sbuf[3]:=byte(＄ ff); </TD></TR></TBODY></TABLE>
            <TABLE width=620 align=center>
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