Issue with Inlining S-Functions with TLC wrapper
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Hello!
I have some troubles to reproduce the exemple described in the https://nl.mathworks.com/help/rtw/tlc/inlining-s-functions.html
I've wrote the TCL wrapper for my S-Function but I still get the error during building:
Error using tlc_c
Block 'test_lib/sfunc_calcCRC32/S-Function' is a
non-inlined S-function, which is not supported with the current configuration. Select Support non-inlined
I could not change the configuration by internal rools so I need to deal with inlined s-function.
I've made a simple exemple that reproduce the error (see mode.zip).
To sum up, I have a main file:
sfunc_calcCRC32.c
#define S_FUNCTION_NAME sfunc_calcCRC32
#define S_FUNCTION_LEVEL 2
#include "simstruc.h"
#include "calcCRC32.h"
/******
inspired by
github.com/vedderb/FaultCheck_QuickCheck/tree/master/Examples/AUTOSAR_E2E_QuickCheck
The CRC module shall implement the CRC32 routine based on the
IEEE- 802.3 CRC32 Ethernet Standard:
CRC result width : 32 bits
Polynomial : 04C11DB7h
Initial value : FFFFFFFFh
Input data reflected : Yes
Result data reflected : Yes
XOR value : FFFFFFFFh
Check : CBF43926h
Magic check : DEBB20E3h (Reflection must be considered!)
******/
static void mdlInitializeSizes(SimStruct *S)
{
ssSetNumSFcnParams(S, 0); // Number of expected parameters
if (ssGetNumSFcnParams(S) != ssGetSFcnParamsCount(S)) {
return; // Parameter mismatch will be reported by Simulink
}
if (!ssSetNumInputPorts(S, 1)) return;
ssSetInputPortWidth(S, 0, DYNAMICALLY_SIZED);
ssSetInputPortDataType(S, 0, SS_UINT32);
ssSetInputPortDirectFeedThrough(S, 0, 1);
if (!ssSetNumOutputPorts(S, 1)) return;
ssSetOutputPortWidth(S, 0, 1);
ssSetOutputPortDataType(S, 0, SS_UINT32);
ssSetNumSampleTimes(S, 1);
ssSetOptions(S, 0);
}
static void mdlInitializeSampleTimes(SimStruct *S)
{
ssSetSampleTime(S, 0, INHERITED_SAMPLE_TIME);
ssSetOffsetTime(S, 0, 0.0);
}
static void mdlOutputs(SimStruct *S, int_T tid)
{
InputUInt32PtrsType uPtrs = (InputUInt32PtrsType)ssGetInputPortSignalPtrs(S, 0);
const int_T len = ssGetInputPortWidth(S, 0);
uint32_T *y = (uint32_T *)ssGetOutputPortSignal(S, 0);
y[0] = calcCRC32(uPtrs, len);
}
static void mdlTerminate(SimStruct *S)
{
// No termination needed
}
#ifdef MATLAB_MEX_FILE
#include "simulink.c"
#else
#include "cg_sfun.h"
#endif
it calls the function calcCRC32(uPtrs, len), described in calcCRC32.c and calcCRC32.h (see in zip)
and the TLC-wrapper sfunc_calcCRC32.tlc
%%This code is the TLC file sfunc_calcCRC32.tlc that inlines sfunc_calcCRC32.c:
%% File : sfunc_calcCRC32.tlc
%% Abstract:
%% Example inlined tlc file for S-function sfunc_calcCRC32.c
%%
%implements "sfunc_calcCRC32" "C"
%% Function: BlockTypeSetup ====================================================
%% Abstract:
%% Create function prototype in model.h as:
%% "extern uint32_T calcCRC32(uint32_T *inPtr, uint32_T numEls);"
%%
%% Function: Start ======================================================
%function Start(block, system) Output
%<LibAddToCommonIncludes("calcCRC32.h")>
%endfunction
%function BlockTypeSetup(block, system) void
%openfile buffer
extern uint32_T calcCRC32(uint32_T *inPtr, uint32_T numEls); /* This line is placed in calcCRC32.h */
%closefile buffer
%<LibCacheFunctionPrototype(buffer)>
%endfunction %% BlockTypeSetup
%% Function: Outputs ===========================================================
%% Abstract:
%% %<y> = calcCRC32( %<inPtr>, %<numEls> );
%%
%function Outputs(block, system) Output
/* %<Type> Block: %<Name> */
%assign y = LibBlockInputSignal(0, "", "", 0)
%assign inPtr = LibBlockInputSignalAddr(0, "", "",0)
%assign numEls = LibBlockOutputSignalWidth(0)
%% PROVIDE THE CALLING STATEMENT FOR "algorithm"
%% The following line is expanded and placed in mdlOutputs within sfunc_calcCRC32.c
{
%<y> = calcCRC32( %<inPtr>, %<numEls> );
}
%endfunction %% Outputs
Thanks in advance for any suggestion!
采纳的回答
Satyam
2026-3-13
1 个投票
Hi Dimitri,
This error usually indicates that the TLC file for the S-Function is not being detected or used during code generation, so the block is treated as a non-inlined S-Function. You can try the following general troubleshooting steps:
- Ensure the TLC file name matches the S-Function name exactly. Simulink uses this naming convention to automatically associate the wrapper during code generation.
- Verify that the TLC file and related source/header files are on the MATLAB path before building the model so the code generator can locate them.
- Clear any previous build artifacts (slprj, rtw, etc.) and rebuild the model to ensure the updated TLC file is used.
- Confirm that the %implements statement in the TLC file matches the S-Function name and that required includes or function prototypes are added correctly so the generated code can call the external function.
- Make sure any external C source files used by the S-Function are included in the build, either through the S-Function implementation or via Simulation Target / Custom Code settings in the model configuration.
- Check the generated code or build report to verify that the block is being expanded inline rather than referenced as a separate S-Function call.
More details on how Simulink associates TLC files with S-Functions and how to implement inlining are described here:
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