Concatenate 2 doubles in Serial output for Arduino

3 次查看(过去 30 天)
I want to concatenate 2 doubles in Serial driver for Arduino, which I created using : http://www.mathworks.com/matlabcentral/fileexchange/39354-device-drivers
The reason is that I want to reduce the time taken by using multiple serial.print commands, and use only one serial.print for all the writing. I used this link as reference: http://letsmakerobots.com/content/arduino-fix-serialprint-used-diagnose-can-adversely-affect-timing
I have been unable to concatenate properly. This is what I want to do.
if true
outData = "";
outData += " Bot_no: "; outData += out_botnumber[0];
outData += " Waypt: "; outData += out_current_waypt[0];
outData += " Dist2Waypt: "; outData += out_dist_2_waypt[0];
Serial1.println(outData);
end
I get the following error:
if true
In file included from ./sfunc_separate_9dof_wrapper.cpp:17:
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/Arduino.h:28:1: warning: this is the location of the previous definition
./sfunc_separate_9dof_wrapper.cpp: In function 'void sfunc_separate_9dof_Update_wrapper(const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, real_T*)':
./sfunc_separate_9dof_wrapper.cpp:247: warning: only initialized variables can be placed into program memory area
./sfunc_separate_9dof_wrapper.cpp:263: warning: only initialized variables can be placed into program memory area
cc1plus.exe: warning: command line option "-Wstrict-prototypes" is valid for Ada/C/ObjC but not for C++
cc1plus.exe: warning: command line option "-std=gnu99" is valid for C/ObjC but not for C++
./sfunc_separate_GPS_V2_wrapper.cpp: In function 'void sfunc_separate_GPS_V2_Update_wrapper(const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, real_T*)':
./sfunc_separate_GPS_V2_wrapper.cpp:237: warning: only initialized variables can be placed into program memory area
cc1plus.exe: warning: command line option "-Wstrict-prototypes" is valid for Ada/C/ObjC but not for C++
cc1plus.exe: warning: command line option "-std=gnu99" is valid for C/ObjC but not for C++
./sfunc_separate_serial_out_wrapper.cpp:20: error: 'long' or 'short' specified with char for 'bufSerialOut'
./sfunc_separate_serial_out_wrapper.cpp: In function 'void sfunc_separate_serial_out_Outputs_wrapper(const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*)':
./sfunc_separate_serial_out_wrapper.cpp:59: error: ambiguous overload for 'operator+=' in 'outData += * out_botnumber'
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:108: note: candidates are: String& String::operator+=(char)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:109: note: String& String::operator+=(unsigned char)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:110: note: String& String::operator+=(int)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:111: note: String& String::operator+=(unsigned int)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:112: note: String& String::operator+=(long int)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:113: note: String& String::operator+=(long unsigned int)
./sfunc_separate_serial_out_wrapper.cpp:60: error: ambiguous overload for 'operator+=' in 'outData += * out_current_waypt'
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:108: note: candidates are: String& String::operator+=(char)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:109: note: String& String::operator+=(unsigned char)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:110: note: String& String::operator+=(int)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:111: note: String& String::operator+=(unsigned int)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:112: note: String& String::operator+=(long int)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:113: note: String& String::operator+=(long unsigned int)
./sfunc_separate_serial_out_wrapper.cpp:61: error: ambiguous overload for 'operator+=' in 'outData += * out_dist_2_waypt'
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:108: note: candidates are: String& String::operator+=(char)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:109: note: String& String::operator+=(unsigned char)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:110: note: String& String::operator+=(int)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:111: note: String& String::operator+=(unsigned int)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:112: note: String& String::operator+=(long int)
C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:113: note: String& String::operator+=(long unsigned int)
./sfunc_separate_serial_out_wrapper.cpp: In function 'void sfunc_separate_serial_out_Update_wrapper(const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, const real_T*, real_T*)':
./sfunc_separate_serial_out_wrapper.cpp:158: warning: only initialized variables can be placed into program memory area
make: *** [HardwareSerial.o] Error 1
end
Can anyone please show me how to concatenate the two doubles as a single string in the device driver. I have attached my S-function driver block along with question.

回答(1 个)

Sreeram Mohan
Sreeram Mohan 2015-4-24
Hi Abhishek,
Just some high level thoughts by just looking at the build logs !
Before this could you please check if the string library is added rightly to the build while you are trying to build ?
Looks like from the error is telling me that something is wrong with the way you are using the string library:
String& String::operator+=(long unsigned int) ./sfunc_separate_serial_out_wrapper.cpp:61: error: ambiguous overload for 'operator+=' in 'outData += * out_dist_2_waypt' C:/MATLAB/SupportPackages/R2014b/arduino-1.0.5/hardware/arduino/cores/arduino/WString.h:108: note: candidates are: String& String::operator+=(char)
Or look at if you have missed to extern the methods on the string class !
Thanks, Sreeram Mohan

类别

Help CenterFile Exchange 中查找有关 Arduino Hardware 的更多信息

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by