B4R Question NewPing

[Johan Schoeman]

I am referring to @Erel's posting here:
https://www.b4x.com/android/forum/threads/inline-c-c.65714/#post-456033

When compiling the B4R project I get an error due to this line of code:

b4r_main::_us = sonar.ping_median(20,500);

Trying Ole32.dll
Found library 'Ole32' at Ole32.dll
Loading configuration...
Initializing packages...
Preparing boards...
Verifying...
C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\----------2\Documents\Arduino\libraries -fqbn=arduino:avr:uno -ide-version=10805 -build-path C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin -warnings=null -prefs=build.path=C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\src\src.ino
C:\Program Files (x86)\Arduino\arduino-builder -compile -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program Files (x86)\Arduino\hardware\tools\avr -built-in-libraries C:\Program Files (x86)\Arduino\libraries -libraries C:\Users\----------2\Documents\Arduino\libraries -fqbn=arduino:avr:uno -ide-version=10805 -build-path C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin -warnings=null -prefs=build.path=C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avr-gcc.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -prefs=runtime.tools.avrdude.path=C:\Program Files (x86)\Arduino\hardware\tools\avr -verbose C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\src\src.ino
Using board 'uno' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Using core 'arduino' from platform in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr
Detecting libraries used...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10805 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\standard" "C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\src.ino.cpp" -o "nul"
Using cached library dependencies for file: C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\B4RArduino.cpp
Using cached library dependencies for file: C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\B4RCore.cpp
Using cached library dependencies for file: C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\B4RStream.cpp
Using cached library dependencies for file: C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\Scheduler.cpp
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10805 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\standard" "C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\b4r_main.cpp" -o "nul"
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10805 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\standard" "-IC:\Program Files (x86)\Arduino\libraries\NewPing\src" "C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\b4r_main.cpp" -o "nul"
Using cached library dependencies for file: C:\Program Files (x86)\Arduino\libraries\NewPing\src\NewPing.cpp
Generating function prototypes...
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics  -flto -w -x c++ -E -CC -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10805 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\standard" "-IC:\Program Files (x86)\Arduino\libraries\NewPing\src" "C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\src.ino.cpp" -o "C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\preproc\ctags_target_for_gcc_minus_e.cpp"
"C:\Program Files (x86)\Arduino\tools-builder\ctags\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\preproc\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
Using previously compiled file: C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\B4RArduino.cpp.o
Using previously compiled file: C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\B4RCore.cpp.o
Using previously compiled file: C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\B4RStream.cpp.o
Using previously compiled file: C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\Scheduler.cpp.o
"C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avr-g++" -c -g -Os  -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD -flto -mmcu=atmega328p -DF_CPU=16000000L -DARDUINO=10805 -DARDUINO_AVR_UNO -DARDUINO_ARCH_AVR   "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\cores\arduino" "-IC:\Program Files (x86)\Arduino\hardware\arduino\avr\variants\standard" "-IC:\Program Files (x86)\Arduino\libraries\NewPing\src" "C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\b4r_main.cpp" -o "C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\b4r_main.cpp.o"
C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\b4r_main.cpp: In function 'void read_cm(B4R::Object*)':
b4r_main.cpp:28: error: request for member 'ping_median' in 'sonar', which is of pointer type 'NewPing*' (maybe you meant to use '->' ?)
   b4r_main::_us = sonar.ping_median(20,500);
                         ^
Using library NewPing at version 1.9.1 in folder: C:\Program Files (x86)\Arduino\libraries\NewPing
exit status 1
Picked up _JAVA_OPTIONS: -Xmx512M

B4R Version: 2.60
Parsing code.    (0.00s)
Building folders structure.    (0.02s)
Compiling code.    (0.01s)
Building project    (0.04s)
Compiling & deploying Ino project (Arduino/Genuino Uno - COM39)    Error
Loading configuration...
Initializing packages...
Preparing boards...
Verifying...
C:\Users\------~1\DOCUME~1\B4R\B4RNEW~1\Objects\bin\sketch\b4r_main.cpp: In function 'void read_cm(B4R::Object*)':
b4r_main.cpp:28: error: request for member 'ping_median' in 'sonar', which is of pointer type 'NewPing*' (maybe you meant to use '->' ?)
   b4r_main::_us = sonar.ping_median(20,500);
                         ^
exit status 1
Picked up _JAVA_OPTIONS: -Xmx512M

If I change....

b4r_main::_us = sonar.ping_median(20,500);

....to....

b4r_main::_us = sonar->ping_median(20,500);

thus, sonar.ping_median replace with sonar->ping_median

....it is working. Can it be because I am maybe making using of a different NewPing Arduino library as what @Erel's sample code is based on?

 

[Erel]

It is a mistake in the code. I took the code from the post above and fixed one of the lines and missed the previous one (see the comment).