how to communicate simulink with Arduino

I'm trying simulate a simple code but:

### Generating code into build folder: C:\Users\Emerson\Documents\matlab\untitled_grt_rtw
### Invoking Target Language Compiler on untitled.rtw
### Using System Target File: C:\Program Files\MATLAB\R2017a\rtw\c\grt\grt.tlc
### Loading TLC function libraries
### Initial pass through model to cache user defined code
.
### Caching model source code
### Writing header file untitled.h
### Writing header file untitled_types.h
### Writing source file untitled.c
.
### Writing header file rtwtypes.h
### Writing header file builtin_typeid_types.h
### Writing header file multiword_types.h
### Writing header file untitled_private.h
### Writing header file rtmodel.h
### Writing source file untitled_data.c
### Writing header file rt_nonfinite.h
.
### Writing source file rt_nonfinite.c
### Writing header file rtGetInf.h
### Writing source file rtGetInf.c
### Writing header file rtGetNaN.h
### Writing source file rtGetNaN.c
### TLC code generation complete.
### Using toolchain: LCC-win64 v2.4.1 | gmake (64-bit Windows)
### Creating 'C:\Users\Emerson\Documents\matlab\untitled_grt_rtw\untitled.mk' ...
### Building 'untitled': "C:\PROGRA~1\MATLAB\R2017a\bin\win64\gmake"  -f untitled.mk all

C:\Users\Emerson\Documents\matlab\untitled_grt_rtw>set MATLAB=C:\Program Files\MATLAB\R2017a  

C:\Users\Emerson\Documents\matlab\untitled_grt_rtw>cd .  

C:\Users\Emerson\Documents\matlab\untitled_grt_rtw>if "" == "" ("C:\PROGRA~1\MATLAB\R2017a\bin\win64\gmake"  -f untitled.mk all )  else ("C:\PROGRA~1\MATLAB\R2017a\bin\win64\gmake"  -f untitled.mk  )  
"C:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/bin/lcc64" -c -w -noregistrylookup -nodeclspec -IC:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/include64 -DMAT_FILE=1 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DTID01EQ=0 -DMODEL=untitled -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DRT -DUSE_RTMODEL -IC:/Users/Emerson/Documents/matlab -IC:/ProgramData/MATLAB/SupportPackages/R2017a/toolbox/target/supportpackages/arduinobase/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include/sf_runtime -IC:/Users/Emerson/Documents/matlab/untitled_grt_rtw -IC:/PROGRA~1/MATLAB/R2017a/extern/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src/ext_mode/common -Fo"rtGetInf.obj" "rtGetInf.c"
"C:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/bin/lcc64" -c -w -noregistrylookup -nodeclspec -IC:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/include64 -DMAT_FILE=1 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DTID01EQ=0 -DMODEL=untitled -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DRT -DUSE_RTMODEL -IC:/Users/Emerson/Documents/matlab -IC:/ProgramData/MATLAB/SupportPackages/R2017a/toolbox/target/supportpackages/arduinobase/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include/sf_runtime -IC:/Users/Emerson/Documents/matlab/untitled_grt_rtw -IC:/PROGRA~1/MATLAB/R2017a/extern/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src/ext_mode/common -Fo"rtGetNaN.obj" "rtGetNaN.c"
"C:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/bin/lcc64" -c -w -noregistrylookup -nodeclspec -IC:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/include64 -DMAT_FILE=1 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DTID01EQ=0 -DMODEL=untitled -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DRT -DUSE_RTMODEL -IC:/Users/Emerson/Documents/matlab -IC:/ProgramData/MATLAB/SupportPackages/R2017a/toolbox/target/supportpackages/arduinobase/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include/sf_runtime -IC:/Users/Emerson/Documents/matlab/untitled_grt_rtw -IC:/PROGRA~1/MATLAB/R2017a/extern/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src/ext_mode/common -Fo"rt_nonfinite.obj" "rt_nonfinite.c"
"C:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/bin/lcc64" -c -w -noregistrylookup -nodeclspec -IC:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/include64 -DMAT_FILE=1 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DTID01EQ=0 -DMODEL=untitled -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DRT -DUSE_RTMODEL -IC:/Users/Emerson/Documents/matlab -IC:/ProgramData/MATLAB/SupportPackages/R2017a/toolbox/target/supportpackages/arduinobase/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include/sf_runtime -IC:/Users/Emerson/Documents/matlab/untitled_grt_rtw -IC:/PROGRA~1/MATLAB/R2017a/extern/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src/ext_mode/common -Fo"untitled.obj" "untitled.c"
"C:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/bin/lcc64" -c -w -noregistrylookup -nodeclspec -IC:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/include64 -DMAT_FILE=1 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DTID01EQ=0 -DMODEL=untitled -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DRT -DUSE_RTMODEL -IC:/Users/Emerson/Documents/matlab -IC:/ProgramData/MATLAB/SupportPackages/R2017a/toolbox/target/supportpackages/arduinobase/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include/sf_runtime -IC:/Users/Emerson/Documents/matlab/untitled_grt_rtw -IC:/PROGRA~1/MATLAB/R2017a/extern/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src/ext_mode/common -Fo"untitled_data.obj" "untitled_data.c"
"C:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/bin/lcc64" -c -w -noregistrylookup -nodeclspec -IC:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/include64 -DMAT_FILE=1 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DTID01EQ=0 -DMODEL=untitled -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DRT -DUSE_RTMODEL -IC:/Users/Emerson/Documents/matlab -IC:/ProgramData/MATLAB/SupportPackages/R2017a/toolbox/target/supportpackages/arduinobase/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include/sf_runtime -IC:/Users/Emerson/Documents/matlab/untitled_grt_rtw -IC:/PROGRA~1/MATLAB/R2017a/extern/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src/ext_mode/common -Fo"rt_logging.obj" "C:\PROGRA~1\MATLAB\R2017a\rtw\c\src\rt_logging.c"
"C:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/bin/lcc64" -c -w -noregistrylookup -nodeclspec -IC:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/include64 -DMAT_FILE=1 -DINTEGER_CODE=0 -DMT=0 -DCLASSIC_INTERFACE=0 -DALLOCATIONFCN=0 -DONESTEPFCN=1 -DTERMFCN=1 -DMULTI_INSTANCE_CODE=0 -DTID01EQ=0 -DMODEL=untitled -DNUMST=1 -DNCSTATES=0 -DHAVESTDIO -DRT -DUSE_RTMODEL -IC:/Users/Emerson/Documents/matlab -IC:/ProgramData/MATLAB/SupportPackages/R2017a/toolbox/target/supportpackages/arduinobase/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include/sf_runtime -IC:/Users/Emerson/Documents/matlab/untitled_grt_rtw -IC:/PROGRA~1/MATLAB/R2017a/extern/include -IC:/PROGRA~1/MATLAB/R2017a/simulink/include -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src -IC:/PROGRA~1/MATLAB/R2017a/rtw/c/src/ext_mode/common -Fo"rt_main.obj" "C:\PROGRA~1\MATLAB\R2017a\rtw\c\src\common\rt_main.c"
C:/PROGRA~1/MATLAB/R2017a/sys/perl/win32/bin/perl.exe C:/PROGRA~1/MATLAB/R2017a/rtw/c/tools/mkvc_lnk.pl untitled.lnk rtGetInf.obj rtGetNaN.obj rt_nonfinite.obj untitled.obj untitled_data.obj rt_logging.obj
"### Creating standalone executable "../untitled.exe" ..." 
"C:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/bin/lcclnk64" -s -LC:/PROGRA~1/MATLAB/R2017a/sys/lcc64/lcc64/lib64  -o ../untitled.exe @untitled.lnk rt_main.obj
untitled.obj .text: undefined reference to 'writeDigitalPin'
untitled.obj .text: undefined reference to 'digitalIOSetup'
gmake: *** [../untitled.exe] Error 2
C:\Users\Emerson\Documents\matlab\untitled_grt_rtw>echo The make command returned an error of 2
The make command returned an error of 2
C:\Users\Emerson\Documents\matlab\untitled_grt_rtw>An_error_occurred_during_the_call_to_make
'An_error_occurred_during_the_call_to_make' não é reconhecido como um comando interno
ou externo, um programa operável ou um arquivo em lotes.
### Build procedure for model: 'untitled' aborted due to an error.
Error(s) encountered while building "untitled":
### Failed to generate all binary outputs.

[Walter Roberson]

Do you have an MATLAB Function Block that is calling writeDigitalPin ?

[Ronaldo Dantas]

No. The image.png show simulink diagram.

[Walter Roberson]

Could you confirm that the only way you are communicating with the Arduino is through the Digital Output block?

https://www.mathworks.com/help/supportpkg/arduino/ug/open-block-library-for-arduino-hardware.html