我一直在尝试超过一个星期通过串行端口从树莓派(QT C++)到Arduino(Arduino IDE C++)进行通信,但我保持失败。Raspberry pi(QT C++)和Arduino(Arduino IDE)之间的通信
我在谷歌上做了一些搜索,看了一个例子......但仍然没有成功。好,所以基本的事情是我需要不断地将Raspberry pi的串口发送命令与Arduino进行通信。我尽量保持代码尽可能简单。
最初,我从树莓派(QT C++)发送“J”字符到Arduino(Arduino IDE C++)并等待J,使LED在Arduino上闪烁。但它不工作..即使我没有得到任何接口&通信&发送数据树莓pi(QT C++)到Arduino(Arduino IDE C++)的示例。我不知道究竟是什么问题。请帮助我解决问题。
在显示器,9600波特率
我重视程序是什么我已经在两侧尝试。
的main.cpp
#include <iostream>
#include <QIODevice>
#include <QtSerialPort/QSerialPort>
#include <QtSerialPort/QSerialPortInfo>
#include <QString>
using namespace std;
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Dialog w;
w.show();
QSerialPort serialPort;
serialPort.setBaudRate(QSerialPort::Baud9600);
QSerialPortInfo info("ttyUSB0");
qDebug() << "Name : " << info.portName();
qDebug() << "Description : " << info.description();
qDebug() << "Busy:" << info.isBusy();
QSerialPort serial;
serial.setPortName("ttyUSB0");
serial.open(QIODevice::ReadWrite);
serial.setBaudRate(QSerialPort::Baud9600);
serial.setDataBits(QSerialPort::Data8);
serial.setParity(QSerialPort::NoParity);
serial.setStopBits(QSerialPort::OneStop);
serial.setFlowControl(QSerialPort::NoFlowControl);
serial.open(QSerialPort::ReadWrite);
cout<<"Readable :"<<serial.isReadable()<<endl;
cout<<"Writable :"<<serial.isWritable()<<endl<<endl;
if (serial.isOpen() && serial.isWritable())
{
qDebug() << "Is open : " << serial.isOpen() << endl;
qDebug() << "Is writable : " << serial.isWritable() << endl;
qDebug() << "Ready..." << endl;
serial.write("J");
QByteArray ba("J\n");
serial.write(ba);
{
QByteArray ba("J");
serial.write(ba);
serial.flush();
qDebug() << "data has been send" << endl;
serial.close();
}
if (serial.bytesToWrite() > 0)
{
serial.flush();
if(serial.waitForBytesWritten(1000))
{
qDebug() << "data has been send" << endl;
}
}
if(serial.flush())
{
qDebug() << "ok" << endl;
}
qDebug() <<"value sent "<< endl;
serial.close();
}
else
{
qDebug() << "An error occured" << endl;
}
return a.exec();
}
Arduino的代码:
int led = 13, avlb = 0;
void setup()
{
Serial.begin(9600);
pinMode(led, OUTPUT);
Serial.println("started");
}
void loop()
{
if (Serial.available() > 0)
{
Serial.println("available");
Serial.println(Serial.available());
delay(2000);
digitalWrite(led, HIGH);
delay(5000);
if(Serial.read() == 'J')
{
Serial.println("read");
Serial.println(Serial.read());
delay(2000);
digitalWrite(led, LOW);
delay(1000);
}
}
else
{
Serial.println("not available");
delay(1000);
}
}
输出显示:
树莓Qt创建者IDE O/P:
Name : "ttyUSB0"
Description : "FT232R USB UART"
Busy: false
Readable :1
Writable :1
Is open : true
Is writable : true
Ready...
data has been send
bool QSerialPort::flush(): device not open
value sent
Arduino的Ide的输出显示:
started
not available
not available
not available
not available
not available
not available
not available
not available
not available