參考

準備

在樹莓派上用Qt寫串列埠傳送資料的程式

serialTEST.pro

QT += core
QT -= gui

TARGET = test
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += main.cpp



INCLUDEPATH +=/usr/local/include \
               /usr/local/include/opencv \
               /usr/local/include/opencv2

LIBS +=/usr/local/lib/libopencv_highgui.so \
        /usr/local
 
/lib/libopencv_core.so \
        /usr/local/lib/libopencv_imgproc.so \
        /usr/local/lib/libopencv_imgcodecs.so\
        /usr/local/lib/libopencv_videoio.so \
        /usr/local/lib/libopencv_video.so \
        /usr/local/lib/libopencv_videostab.so \
        /usr/local/lib/libopencv_calib3d.so \
        /usr/local/lib/libopencv_features2d.so\
        /usr/local
 
/lib/libopencv_flann.so \
        /usr/local/lib/libopencv_ml.so \
        /usr/local/lib/libopencv_objdetect.so \
        /usr/local/lib/libopencv_photo.so \
        /usr/local/lib/libopencv_shape.so \
        /usr/local/lib/libopencv_stitching.so \
        /usr/local/lib/libopencv_superres.so   #這些是opencv的庫
LIBS +=-lwiringPi    #這個是wiringPi的庫
 

main.cpp

#include "opencv2/opencv.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <wiringPi.h>
#include <wiringSerial.h>
#include <iostream>
#include<sys/stat.h>
#include<unistd.h>
using namespace std;
using namespace cv;
int main(void)
{
     int fd;
     char str[6],str1[6];
     if(wiringPiSetupSys()<0)return 1; //初始化wiringPi

     sprintf(str,"%s%s%s","X","110","R");
     sprintf(str1,"%s%s%s","Y","220","R");//字串拼接，%s可替換成int/float變數
while(1)
{
    delay(10);
    /*開啟串列埠裝置ttyS0，波特率9600*/
    if((fd=serialOpen("/dev/ttyS0",9600))<0)
       {
        int time = millis();//計時函式，從wiringPi初始化開始至今
        printf("serial doesn't open,return -1,time is %d",time);
        return 1;
         }
    serialPrintf(fd,str); //向串列埠裝置傳送資料，整個str字串
    serialPrintf(fd,str1);
    serialClose(fd);//傳送完之後關閉串列埠，不然會出現程式執行一段時間後串列埠自動關閉的情況（serialOpen()返回-1）。
    int c = waitKey(10);
    if ((char)c == 27) { break; } // escape
}
    serialClose(fd);
    return 0;
}

測試

電腦接收到 “X110RY220R”