Why do I encounter "Error using raspi.inte​rnal.updat​eServer (line 90) Error executing command "make -C /opt/MATLA​B/server_v​16.2.0 -f Makefile"." error message while creating a Raspberry pi object?

I have the MATLAB Support Package for Raspberry Pi and when I try to create a raspi object for the Raspberry Pi 3B using the below command, I encounter the error message that follows:

>> mypi = raspi ('192.168.137.11','pi','raspberry')

### Updating Raspberry Pi I/O server...

### Connecting to board...

### Connected to 192.168.137.11...

### Creating server folder...

### Transferring source files...

### Building MATLAB I/O server...

Error using raspi.internal.updateServer (line 90)

Error executing command "make -C /opt/MATLAB/server_v16.2.0 -f Makefile". Details:

STDERR: I2C.c: In function ‘I2C_open’:

I2C.c:28:19: warning: unused variable ‘i2c_funcs’ [-Wunused-variable]

unsigned long i2c_funcs = 0;

^

I2C.c: In function ‘EXT_I2C_readRegister’:

I2C.c:73:20: error: array type has incomplete element type

struct i2c_msg msg[2];

^

I2C.c:82:20: error: ‘I2C_M_RD’ undeclared (first use in this function)

msg[1].flags = I2C_M_RD | I2C_M_NOSTART; // Read

^

I2C.c:82:20: note: each undeclared identifier is reported only once for each function it appears in

I2C.c:82:31: error: ‘I2C_M_NOSTART’ undeclared (first use in this function)

msg[1].flags = I2C_M_RD | I2C_M_NOSTART; // Read

^

I2C.c:73:20: warning: unused variable ‘msg’ [-Wunused-variable]

struct i2c_msg msg[2];

^

I2C.c: In function ‘EXT_I2C_writeRegister’:

I2C.c:109:20: error: array type has incomplete element type

struct i2c_msg msg[2];

^

I2C.c:121:20: error: ‘I2C_M_NOSTART’ undeclared (first use in this function)

msg[1].flags = I2C_M_NOSTART; // Write

^

I2C.c:109:20: warning: unused variable ‘msg’ [-Wunused-variable]

struct i2c_msg msg[2];

^

I2C.c: In function ‘EXT_I2C_write’:

I2C.c:147:20: error: storage size of ‘msg’ isn’t known

struct i2c_msg msg;

^

I2C.c:147:20: warning: unused variable ‘msg’ [-Wunused-variable]

I2C.c: In function ‘EXT_I2C_read’:

I2C.c:177:20: error: storage size of ‘msg’ isn’t known

struct i2c_msg msg;

^

I2C.c:181:17: error: ‘I2C_M_RD’ undeclared (first use in this function)

msg.flags = I2C_M_RD;

^

I2C.c:177:20: warning: unused variable ‘msg’ [-Wunused-variable]

struct i2c_msg msg;

^

make: * [obj/I2C.o] Error 1

STDOUT: make: Entering directory '/opt/MATLAB/server_v16.2.0'

[Compiling] auth.c

gcc -c -O2 -Wall -I/opt/userland -I/opt/userland/host_applications/linux/libs/bcm_host/include

-I/opt/userland/interface/vcos -I/opt/userland/interface/vcos/pthreads -I/opt/userland/interface/vmcs_host/linux

-I/opt/userland/host_applications/linux/apps/raspicam -Winline -pipe -D_DEBUG -D_MATLABIO_ auth.c -o obj/auth.o

[Compiling] server.c

gcc -c -O2 -Wall -I/opt/userland -I/opt/userland/host_applications/linux/libs/bcm_host/include

-I/opt/userland/interface/vcos -I/opt/userland/interface/vcos/pthreads -I/opt/userland/interface/vmcs_host/linux

-I/opt/userland/host_applications/linux/apps/raspicam -Winline -pipe -D_DEBUG -D_MATLABIO_ server.c -o obj/server.o

[Compiling] handler.c

gcc -c -O2 -Wall -I/opt/userland -I/opt/userland/host_applications/linux/libs/bcm_host/include

-I/opt/userland/interface/vcos -I/opt/userland/interface/vcos/pthreads -I/opt/userland/interface/vmcs_host/linux

-I/opt/userland/host_applications/linux/apps/raspicam -Winline -pipe -D_DEBUG -D_MATLABIO_ handler.c -o obj/handler.o

[Compiling] devices.c

gcc -c -O2 -Wall -I/opt/userland -I/opt/userland/host_applications/linux/libs/bcm_host/include

-I/opt/userland/interface/vcos -I/opt/userland/interface/vcos/pthreads -I/opt/userland/interface/vmcs_host/linux

-I/opt/userland/host_applications/linux/apps/raspicam -Winline -pipe -D_DEBUG -D_MATLABIO_ devices.c -o obj/devices.o

[Compiling] LED.c

gcc -c -O2 -Wall -I/opt/userland -I/opt/userland/host_applications/linux/libs/bcm_host/include

-I/opt/userland/interface/vcos -I/opt/userland/interface/vcos/pthreads -I/opt/userland/interface/vmcs_host/linux

-I/opt/userland/host_applications/linux/apps/raspicam -Winline -pipe -D_DEBUG -D_MATLABIO_ LED.c -o obj/LED.o

[Compiling] GPIO.c

gcc -c -O2 -Wall -I/opt/userland -I/opt/userland/host_applications/linux/libs/bcm_host/include

-I/opt/userland/interface/vcos -I/opt/userland/interface/vcos/pthreads -I/opt/userland/interface/vmcs_host/linux

-I/opt/userland/host_applications/linux/apps/raspicam -Winline -pipe -D_DEBUG -D_MATLABIO_ GPIO.c -o obj/GPIO.o

[Compiling] I2C.c

gcc -c -O2 -Wall -I/opt/userland -I/opt/userland/host_applications/linux/libs/bcm_host/include

-I/opt/userland/interface/vcos -I/opt/userland/interface/vcos/pthreads -I/opt/userland/interface/vmcs_host/linux

-I/opt/userland/host_applications/linux/apps/raspicam -Winline -pipe -D_DEBUG -D_MATLABIO_ I2C.c -o obj/I2C.o

Makefile:46: recipe for target 'obj/I2C.o' failed

make: Leaving directory '/opt/MATLAB/server_v16.2.0'

Error in raspi.updateServer (line 1192)

raspi.internal.updateServer(varargin{:});

Error in raspi/launchServer (line 792)

raspi.updateServer(obj.DeviceAddress,...

Error in raspi (line 203)

launchServer(obj);

=======================================================================

Answer 1

[MathWorks Support Team]

The issue is due to missing the library "libi2c-dev". 

1.If MathWorks custom raspbian image is used on the Raspberry Pi, then do the following:

Go through targetupdater and install our custom image on the Raspberry Pi as all the required libraries(including libi2c-dev) are included in this image. To do that, execute the following in MATLAB:

>> targetupdater

and follow the instructions.

2.If you have disabled i2c from raspi-config, then do the following to enable it:

1. Execute the below command in the linux shell of Raspberry pi: 

$ sudo raspi-config

2. Go to "Advanced options"

3. Select "I2C" and enable it.

3.If you have removed "libi2c-dev" from the MathWorks custom raspbian image, try to reinstall it by executing the below command in linux shell of Raspberry pi:

$ sudo apt-get install libi2c-dev