Get a block's discrete states
real_T *ssGetDiscStates(SimStruct *S)
A pointer (real_T *) to the discrete state vector as an array of length ssGetNumDiscStates(S). Returns NULL if the S-function does not have any discrete states.
Use to obtain the block's discrete states. Typically, the state vector is initialized in mdlInitializeConditions, updated in mdlUpdate, and used in mdlOutputs. You can use this macro in the simulation loop, mdlInitializeConditions, or mdlStart routines.