tests/python/plc.xml
author Edouard Tisserant
Wed, 02 Apr 2014 21:07:35 +0200
changeset 1405 0b9cd761a356
parent 1401 611fded24ce4
child 1419 d6adca8b6697
permissions -rw-r--r--
xmlclass : Ensured precedence of newly defined class in case of conflicting declaration
<?xml version='1.0' encoding='utf-8'?>
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  <contentHeader name="Beremiz Python Support Tests" modificationDateTime="2014-03-27T09:15:55">
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            <comment localId="16" height="90" width="680">
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                <xhtml:p><![CDATA[This example test that, despite of 2T period clock stimulating TRIG pin of pyth_eval blocks, blocks keep executing one after the other, in respect of execution order.]]></xhtml:p>
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                <xhtml:p><![CDATA[You will be ready to use beremiz with C and Python when you will understand why "FromInput" is equal  to 75.
Enjoy. ]]></xhtml:p>
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            </comment>
            <comment localId="31" height="60" width="345">
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                <xhtml:p><![CDATA[Sleep here is bad. It blocks other py_eval instances. Whith a wxGlade GUI, GUI freeze for a second.]]></xhtml:p>
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            </comment>
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                <xhtml:p><![CDATA[Prints FBID to stdout of PLC runtime. FBID is a unique reference to py_eval instance.]]></xhtml:p>
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            </comment>
            <comment localId="10" height="60" width="345">
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                <xhtml:p><![CDATA[Simple_C_Call is declared in C_File "1.x:c_code". See python ctypes manual for details on typing.]]></xhtml:p>
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            </comment>
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              <content>
                <xhtml:p><![CDATA[Fast clock, at least faster that sleep(1). See what happens when python takes time to answer : PLC continues.]]></xhtml:p>
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            <comment localId="60" height="40" width="500">
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              <content>
                <xhtml:p><![CDATA[Test for access to Gobal FB variables is disabled, as broken in matiec]]></xhtml:p>
              </content>
            </comment>
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      </pou>
      <pou name="C_Pragma" pouType="functionBlock">
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            <variable name="IN">
              <type>
                <SINT/>
              </type>
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          <localVars>
            <variable name="COORDS">
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            <xhtml:p><![CDATA[(* hereafter is a C pragma accessing FB interface in a clean way *)
{{
  char toPLC;
  char fromPLC = GetFbVar(IN);
  extern int PLC_C_Call(char, char *);
  if(PLC_C_Call(fromPLC, &toPLC)){
    SetFbVar(OUT, toPLC);
  }
  if(0){
    /* that code demonstrate C access to complex types */
    char somebyte = GetFbVar(COORDS, .table[3]);
    SetFbVar(SMURF, somebyte, .FIRSTBYTE);
    SetFbVar(COORDS, somebyte, .table[4]);
  }
}}
(* If you do not use __GET_VAR and _SET_VAR macro, expect unexpected *)
Global_RS();
]]></xhtml:p>
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            <variable name="TOTO">
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        <globalVars>
          <variable name="Global_RS">
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          <variable name="TUTU">
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</project>