通过采用c RS232 PC和Arduino的串行通信++ [英] Serial communication between pc and arduino via RS232 using c++

问题描述

我想通过RS232线与Arduino的我要duemilanove沟通。我只是希望能够一个字节（或字符）从桌面应用程序发送到我的Arduino。在Arduino是插到USB COM5我的电脑上。我有RS232插入COM1，然后我对连接到Arduino的引脚RS232的另一端引脚2 3和5 TX，RX和GND，分别为。

I am trying to communicate with my arduino duemilanove via an RS232 cord. I simply want to be able to send a byte (or char) to my arduino from a desktop application. The Arduino is plugging into USB COM5 on my computer. I have the RS232 plugged into COM1, and then I have pins 2 3 and 5 on the other end of the RS232 connected to arduino pins TX, RX, and GND, respectively.

我找到了c进行串口通信类++以下链接：

I found a serial comm class for c++ at the following link:

http://playground.arduino.cc/Interfacing/CPP​​Windows

我已经加入从上面的例子Serial.h和Serial.cpp h和.cpp文件（我认为示例使用SerialClass.h和SerialClass.cpp，我只是改变了名称）。

I have added the .h and .cpp files from the above example as Serial.h and Serial.cpp (i think the example uses SerialClass.h and SerialClass.cpp, I just changes the names).

在我的Arduino，我有以下的code运行：

On my arduino, I have the following code running:

// ARDUINO
char incomingByte = 0;

void setup() {
        Serial.begin(9600);
}

void loop() {

        // send data only when you receive data:
        if (Serial.available() > 0) {
                // read the incoming byte:
                incomingByte = Serial.read();

                // say what you got:
                Serial.print("I received: ");
                Serial.println(incomingByte, HEX);
        }
}

---

和我的C ++程序如下：

---

And my c++ program is the following:

// C++
#include <iostream>
#include <Windows.h>
#include "Serial.h"

using namespace std;

int main(void)
{
    Serial port("COM1");

    char* msg = "Hello Arduino!";
    int msgLen = strlen(msg);
    bool writeSuccess = port.WriteData(msg, msgLen);

    cout << "\n\n";
    system("PAUSE");
}

---

当我使用的Arduino的串行端口观众看到的只是把打印的内容，我越来越不符合我送什么（只要我可以告诉）很奇怪的值。

---

When I use the Arduino's serial port viewer to see what is bring printed, I'm getting very strange values that don't match what I'm sending (as far as I can tell).

当我送你好Arduino的！，Arduino的打印以下内容：

When I send "Hello Arduino!", the arduino prints the following:

I received: FFFFFFAB
I received: 3A
I received: 3A
I received: A
I received: FFFFFFFA
I received: FFFFFFEB
I received: 6D
I received: 37
I received: 15
I received: 2D
I received: 23
I received: 21
I received: FFFFFFBD
I received: 0

这似乎并不为你好Arduino的！正确的十六进制，但我不知道为什么它是不正确的。没有人有任何线索，我做错了什么？

This does not appear to be the correct hex for "Hello Arduino!", but I have no idea why it's not correct. Does anyone have any clue what I'm doing wrong?

推荐答案

Arduino的使用TTL逻辑串行连接。它在0和5V预计值。 RS232使用不同的电压-V到+ V。您可能需要一个转换器。

Arduino used TTL logic for Serial connection. It expects values at 0 and 5V. RS232 used a different voltage -V to +V. You may need a converter.

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