--- /dev/null
+/*
+ * sfuntmpl_basic.c: Basic 'C' template for a level 2 S-function.
+ *
+ * -------------------------------------------------------------------------
+ * | See matlabroot/simulink/src/sfuntmpl_doc.c for a more detailed template |
+ * -------------------------------------------------------------------------
+ *
+ * Copyright 1990-2002 The MathWorks, Inc.
+ * $Revision: 1.27.4.2 $
+ */
+
+
+/*
+ * You must specify the S_FUNCTION_NAME as the name of your S-function
+ * (i.e. replace sfuntmpl_basic with the name of your S-function).
+ */
+
+#define S_FUNCTION_NAME sfDigitalInput
+#define S_FUNCTION_LEVEL 2
+
+#define CHNL_PRM(S) (mxGetScalar(ssGetSFcnParam(S, 0)))
+
+/*
+ * Need to include simstruc.h for the definition of the SimStruct and
+ * its associated macro definitions.
+ */
+#include "simstruc.h"
+#include "mf624_SIMULINK.h"
+
+/* Error handling
+ * --------------
+ *
+ * You should use the following technique to report errors encountered within
+ * an S-function:
+ *
+ * ssSetErrorStatus(S,"Error encountered due to ...");
+ * return;
+ *
+ * Note that the 2nd argument to ssSetErrorStatus must be persistent memory.
+ * It cannot be a local variable. For example the following will cause
+ * unpredictable errors:
+ *
+ * mdlOutputs()
+ * {
+ * char msg[256]; {ILLEGAL: to fix use "static char msg[256];"}
+ * sprintf(msg,"Error due to %s", string);
+ * ssSetErrorStatus(S,msg);
+ * return;
+ * }
+ *
+ * See matlabroot/simulink/src/sfuntmpl_doc.c for more details.
+ */
+
+/*====================*
+ * S-function methods *
+ *====================*/
+
+/* Function: mdlInitializeSizes ===============================================
+ * Abstract:
+ * The sizes information is used by Simulink to determine the S-function
+ * block's characteristics (number of inputs, outputs, states, etc.).
+ */
+static void mdlInitializeSizes(SimStruct *S)
+{
+ /* See sfuntmpl_doc.c for more details on the macros below */
+
+ ssSetNumSFcnParams(S, 1); /* Number of expected parameters */
+ if (ssGetNumSFcnParams(S) != ssGetSFcnParamsCount(S)) {
+ /* Return if number of expected != number of actual parameters */
+ ssSetErrorStatus(S,"Parameter count mismatch");
+ return;
+ }
+
+ ssSetNumContStates(S, 0);
+ ssSetNumDiscStates(S, 0);
+
+ if (!ssSetNumInputPorts(S, 0)) return;
+
+ if (!ssSetNumOutputPorts(S, 1)) return;
+ ssSetOutputPortWidth(S, 0, 1);
+
+ ssSetNumSampleTimes(S, 1);
+ ssSetNumRWork(S, 0);
+ ssSetNumIWork(S, 0);
+ ssSetNumPWork(S, 0);
+ ssSetNumModes(S, 0);
+ ssSetNumNonsampledZCs(S, 0);
+
+ /* Specify the sim state compliance to be same as a built-in block */
+ ssSetSimStateCompliance(S, USE_DEFAULT_SIM_STATE);
+
+ ssSetOptions(S, 0);
+}
+
+
+
+/* Function: mdlInitializeSampleTimes =========================================
+ * Abstract:
+ * This function is used to specify the sample time(s) for your
+ * S-function. You must register the same number of sample times as
+ * specified in ssSetNumSampleTimes.
+ */
+static void mdlInitializeSampleTimes(SimStruct *S)
+{
+ ssSetSampleTime(S, 0, CONTINUOUS_SAMPLE_TIME);
+ ssSetOffsetTime(S, 0, 0.0);
+}
+
+
+
+#undef MDL_INITIALIZE_CONDITIONS /* Change to #undef to remove function */
+#if defined(MDL_INITIALIZE_CONDITIONS)
+ /* Function: mdlInitializeConditions ========================================
+ * Abstract:
+ * In this function, you should initialize the continuous and discrete
+ * states for your S-function block. The initial states are placed
+ * in the state vector, ssGetContStates(S) or ssGetRealDiscStates(S).
+ * You can also perform any other initialization activities that your
+ * S-function may require. Note, this routine will be called at the
+ * start of simulation and if it is present in an enabled subsystem
+ * configured to reset states, it will be call when the enabled subsystem
+ * restarts execution to reset the states.
+ */
+ static void mdlInitializeConditions(SimStruct *S)
+ {
+ }
+#endif /* MDL_INITIALIZE_CONDITIONS */
+
+
+
+#define MDL_START /* Change to #undef to remove function */
+#if defined(MDL_START)
+ /* Function: mdlStart =======================================================
+ * Abstract:
+ * This function is called once at start of model execution. If you
+ * have states that should be initialized once, this is the place
+ * to do it.
+ */
+ static void mdlStart(SimStruct *S)
+ {
+ if (mf624_init(NULL) != 0)
+ return;
+ }
+#endif /* MDL_START */
+
+
+
+/* Function: mdlOutputs =======================================================
+ * Abstract:
+ * In this function, you compute the outputs of your S-function
+ * block.
+ */
+static void mdlOutputs(SimStruct *S, int_T tid)
+{
+ real_T *y;
+ uint16_t din;
+
+ if (mf624_check(S) != 0)
+ return;
+
+ y = (real_T *)ssGetOutputPortSignal(S, 0);
+
+ din = mf624_read16(MFST2REG(mfst, 2, DIN_reg));
+
+ *y = din & (1 << (int)(CHNL_PRM(S)-1)) ? 0.0 : 1.0;
+}
+
+
+
+#undef MDL_UPDATE /* Change to #undef to remove function */
+#if defined(MDL_UPDATE)
+ /* Function: mdlUpdate ======================================================
+ * Abstract:
+ * This function is called once for every major integration time step.
+ * Discrete states are typically updated here, but this function is useful
+ * for performing any tasks that should only take place once per
+ * integration step.
+ */
+ static void mdlUpdate(SimStruct *S, int_T tid)
+ {
+ }
+#endif /* MDL_UPDATE */
+
+
+
+#undef MDL_DERIVATIVES /* Change to #undef to remove function */
+#if defined(MDL_DERIVATIVES)
+ /* Function: mdlDerivatives =================================================
+ * Abstract:
+ * In this function, you compute the S-function block's derivatives.
+ * The derivatives are placed in the derivative vector, ssGetdX(S).
+ */
+ static void mdlDerivatives(SimStruct *S)
+ {
+ }
+#endif /* MDL_DERIVATIVES */
+
+
+
+/* Function: mdlTerminate =====================================================
+ * Abstract:
+ * In this function, you should perform any actions that are necessary
+ * at the termination of a simulation. For example, if memory was
+ * allocated in mdlStart, this is the place to free it.
+ */
+static void mdlTerminate(SimStruct *S)
+{
+ mf624_done();
+}
+
+
+/*======================================================*
+ * See sfuntmpl_doc.c for the optional S-function methods *
+ *======================================================*/
+
+/*=============================*
+ * Required S-function trailer *
+ *=============================*/
+
+#ifdef MATLAB_MEX_FILE /* Is this file being compiled as a MEX-file? */
+#include "simulink.c" /* MEX-file interface mechanism */
+#else
+#include "cg_sfun.h" /* Code generation registration function */
+#endif
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