Set the data types of ports whose data types cannot be determined from block connectivity
No
C, C++
#define MDL_SET_DEFAULT_PORT_DATA_TYPESvoid mdlSetDefaultPortDataTypes(SimStruct *S)
S
SimStruct representing an S-Function block.
The Simulink®engine invokes this method if the block has ports whose data types cannot be determined from block connectivity. (This usually happens when the block is unconnected or is part of a feedback loop.) This method must set the data types of all ports whose data types are not set. This method is only valid for simulation, and must be enclosed in a#if defined(MATLAB_MEX_FILE)
statement.
If the block does not implement this method and the engine cannot determine the data types of any of its ports, the engine sets the data types of all the ports todouble
. If the block does not implement this method and the engine cannot determine the data types of some, but not all, of its ports, the engine sets the unknown ports to the data type of the port whose data type has the largest size.
The engine invokes an error if themdlSetDefaultPortDataType
method attempts to modify the data type of a port when the data type was previously specified bymdlSetInputPortDataType
ormdlSetOutputPortDataType
. If an S-function has multiple input or output ports,mdlSetDefaultPortDataType
should check if the data type of a port is still dynamic before attempting to set the type. For example, themdlSetDefaultPortDataType
uses the following lines to check if the data type of the second input port is still unknown.
if (ssGetInputPortDataType(S, 1) == DYNAMICALLY_TYPED) { ssSetInputPortDataType(S, 1, SS_UINT8 ); }