RaspiberryPi openCV with wiringPi

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My last post GPIO control for raspberry openCV is use system() function.

This post use wiringpi library.

I forgot wiringPi initialize.

If you added wiringPiSetup(), wiringPi is work.

You can download my changed code.

Backup your camcv_vid1.cpp and CMakeLists.txt files.

Extract zip files

And compile and build(cmake and make.)

RUN

If you see this error

Need a root.

So, you will typing this.

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sudo ./camcv others/csv.txt l 2000

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GPIO control for raspberry openCV

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There are many library for GPIO control.

Usually we use wiringPi.

But difficult compile wiringPi in cmake of camcv. 

Compile is ok but code does not run.

I added CmakeList.txt

CmakeList.txt

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SET(CMAKE_CXX_FLAGS "-pthread -I/usr/local/include -L/usr/local/lib -lwiringPi") include_directories(/usr/local/include/) target_link_libraries(/usr/local/lib/libwiringPi.so /usr/local/lib/libwiringPiDev.so )

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Added  camcv_vid1.cpp

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#include <wiringPi.h>

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Added main() function code

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pinMode(0, OUTPUT);    // output mode     digitalWrite(0, 0);    //output low

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Added in recognize function code

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digitalWrite(0, 1);    //output high

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But doesn't run. So I tried another method.

shell command!!

I referred digipine.com 

system() function is shell command function.

Added main() function code.

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system("gpio mode 0 out");    //ans  system("gpio write 0 0");    //ans

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GPIO 0 -> output

GPIO 0 -> low

Added in recognize function code

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// display name of the guy on the picture string box_text; if (prediction<MAX_PEOPLE) {     box_text = "Id="+people[prediction];     if (prediction == P_NATACHA) //ans         system("gpio write 0 1");    //ans } Colored by Color Scripter

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If recognized natacha, gpio 0 is high.

I referred wiringpi.com 

I use code is

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gpio mode 0 out //gpio 0 output  gpio write 0 0  //gpio 0 low  gpio write 0 1  //gpio 0 high

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