Device Driver Block Build Error: digitalio_raspi.h not found

I have no problem with model "raspberrypi_gettingstarted" and the PI3.I am following "Create a Digital Write Block" and created a directory with files, and a simulink model yz_ddblk_test.slx. When build, the error message reads,

"D:/Users/YZ/Documents/MATLAB/yz_ddblk/yz_ddblk_test_ert_rtw/yz_ddblk_test.c" D:/Users/YZ/Documents/MATLAB/yz_ddblk/yz_ddblk_test_ert_rtw/yz_ddblk_test.c: In function 'yz_ddblk_test_initialize': D:/Users/YZ/Documents/MATLAB/yz_ddblk/yz_ddblk_test_ert_rtw/yz_ddblk_test.c:82:46: fatal error: yz_ddblk/include/digitalio_raspi.h: No such file or directory #include "yz_ddblk/include/digitalio_raspi.h" ^ compilation terminated. gmake: *** [yz_ddblk_test.c.o] Error 1 D:\Users\YZ\Documents\MATLAB\yz_ddblk\yz_ddblk_test_ert_rtw>echo The make command returned an error of 2 The make command returned an error of 2 D:\Users\YZ\Documents\MATLAB\yz_ddblk\yz_ddblk_test_ert_rtw>exit /B 1

I have installed Matlab HSP for RPi and Simulink HSP for RPi. It seems no suitable cross compiler, so I installed Embedded Coder for ARM Cortex-A.

The configuration parameters:

Hardware Implementation: Raspberry Pi, ert.tlc

Simuliation Target Language: C, (insert custom C code: None, additional build information: None)

Code Generation: Target ert.tlc, Toolchain: Linaro Toolchain v4.8, Custom Code: None.

Did I miss anything? Thanks for any tips.

FYI.

Regards,

Yongzhi