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Open topic with navigation CAPL Functions » System Variables » sysSetVariableData

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sysSetVariableData

Valid for: CANoe DE • CANoe:lite DE • CANoe4SW DE • CANoe4SW:lite DE

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Function Syntax

  • long sysSetVariableData(char namespace[], char variable[], byte data[], long size); // form 1
  • long sysSetVariableData(SysVarName, byte data[], long size); // form 2

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Description

Sets the value of a variable of the type data, string, struct or generic array. Note
  • The function can also be used for specific elements of a system variable of type struct or generic array. For this, add the element to the name of the variable. If you directly give the element name to the function instead of using strings, precede the name by sysvarMember:: instead of sysvar::. Example: sysvarMember::SomeNamespace::SomeStructVariable.SomeArrayMember[0]
  • For variables of type string, the raw bytes of the string are set. The string value must either be encoded in UTF-8 or in the current active codepage of the computer, depending on the setting in the Options dialog (String Encoding). A terminating 0 is optional.
  • For variables of type struct that contain a member of type data, a maximum length must be specified when defining this structure member.

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Parameters

  • namespace: Name of the namespace.
  • variable: Name of the variable.
  • data: New values for the variable.
  • size: New size for the variable. Must not exceed the length of the data array.
  • SysVarName: Name of the fully qualified name of the system variable, including all namespaces, separated by ”::”. The name must be preceded by “sysVar::”.

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Return Values

  • 0: no error, function successful
  • 1: namespace was not found or second try to define the same namespace
  • 2: variable was not found or second try to define the same variable
  • 3: no writing right for the namespace available
  • 4: the variable has no suitable type for the function

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Example

This example shows the use of system variable types as a return value of functions and as a local variable. The user-defined CAPL function getSysVarData returns any system variable of type Data. The function is therefore defined with the system variable type sysvarData as the return value. The system variable sv1 (defined with system variable type Data) represents any system variable depending on the counter of the getSysVarData function. The value of a system variable is set with the CAPL function sysSetVariableData. The value of the system variable is get with the CAPL function sysGetVariableData and output in the Write Window. Note You must define the system variables FMW1::KeyData, DCM::SpeedSignalData, and Engine::EngineData in the System Variables Configuration dialog first. 
on key 'e'
{
  sysvarData * svData1;
  char valueSysVarData[100];
  byte buf[2];
  long size = 2;
  long copiedBytes;
  byte data[2] = {0xAF, 0xEF};
  svData1 = getSysVarData(0);
  sysGetVariableData(svData1, buf, copiedBytes);
  write("Variable is %s, Value is %x", svData1.name, buf[0]);
  sysSetVariableData(svData1, data, size);
  sysGetVariableData(svData1, buf, copiedBytes);
  write("Variable is %s, Value is now: %x", svData1.name, buf[0]);
  svData1 = getSysVarData(1);
  sysGetVariableData(svData1, buf, copiedBytes);
  write("Variable is %s, Value is %x", svData1.name, buf[0]);
  svData1 = getSysVarData(2);
  sysGetVariableData(svData1, buf, copiedBytes);
  write("Variable is %s, Value is %x", svData1.name, buf[0]);
}

sysvarData * getSysVarData(int eKey)
{
  switch (eKey)
  {
    case 0:
      return sysvar::FMW1::KeyData;
    case 1:
      return sysvar::DCM::SpeedSignalData;
    default:
      return sysvar::Engine::EngineStateData;
  }
}
sysGetVariableData