C# C++；DLL函数在C中似乎不起作用#

我用C#和

bird.dll

开发了一个小程序，但是

birdrs32wakeup（）

函数似乎不起作用

<>当我在C++中调用<代码> BRDRS22WAKEUP（）/Cuff>函数时，程序将暂停一段时间（8-10秒）。看起来它正在开始与硬件（鸟群）连接

但在C#中，调用

birdRS232WakeUp（）

时它不会停止。如何解决此问题

C代码如下所示

[DllImport(@"Bird.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern bool birdRS232WakeUp(int nGroupID, Boolean  bStandAlone, int nNumDevices,
                                          ref ushort[] pwComport, uint dwBaudRate,
                                          uint dwReadTimeout, uint dwWriteTimeout);

ushort[] COM_port = new ushort[]{0,16,0,0,0};
if ((!birdRS232WakeUp(GROUP_ID, false, DEVCOUNT, ref COM_port, BAUD_RATE, READ_TIMEOUT, WRITE_TIMEOUT)))
{
    LWakeUpStatus.Text = "Failde to wake up FOB";
}

WORD COM_port[5] = {0,15,0,0,0}

if ((!birdRS232WakeUp(GROUP_ID,
    FALSE, // Not stand-alone
    DEVCOUNT, // Number of Devices
    COM_port, // COM Port
    BAUD_RATE, // BAUD
    READ_TIMEOUT,WRITE_TIMEOUT, // Reponses timeouts
    GMS_GROUP_MODE_ALWAYS)))
{
    printf("Can't Wake Up Flock!\n");
    Sleep(3000);
    exit(-1);}

public  static extern bool birdRS232WakeUp(int nGroupID, Boolean  bStandAlone, int nNumDevices,
                           ushort[] pwComport, uint dwBaudRate, uint dwReadTimeout,
                           uint dwWriteTimeout,int nGroupMode);

if ((!birdRS232WakeUp(GROUP_ID, false, DEVCOUNT, COM_port, BAUD_RATE, READ_TIMEOUT, WRITE_TIMEOUT,2)))
{
    LWakeUpStatus.Text = "Failde to wake up FOB";
}

和C++代码看起来如下：

[DllImport(@"Bird.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern bool birdRS232WakeUp(int nGroupID, Boolean  bStandAlone, int nNumDevices,
                                          ref ushort[] pwComport, uint dwBaudRate,
                                          uint dwReadTimeout, uint dwWriteTimeout);

ushort[] COM_port = new ushort[]{0,16,0,0,0};
if ((!birdRS232WakeUp(GROUP_ID, false, DEVCOUNT, ref COM_port, BAUD_RATE, READ_TIMEOUT, WRITE_TIMEOUT)))
{
    LWakeUpStatus.Text = "Failde to wake up FOB";
}

WORD COM_port[5] = {0,15,0,0,0}

if ((!birdRS232WakeUp(GROUP_ID,
    FALSE, // Not stand-alone
    DEVCOUNT, // Number of Devices
    COM_port, // COM Port
    BAUD_RATE, // BAUD
    READ_TIMEOUT,WRITE_TIMEOUT, // Reponses timeouts
    GMS_GROUP_MODE_ALWAYS)))
{
    printf("Can't Wake Up Flock!\n");
    Sleep(3000);
    exit(-1);}

public  static extern bool birdRS232WakeUp(int nGroupID, Boolean  bStandAlone, int nNumDevices,
                           ushort[] pwComport, uint dwBaudRate, uint dwReadTimeout,
                           uint dwWriteTimeout,int nGroupMode);

if ((!birdRS232WakeUp(GROUP_ID, false, DEVCOUNT, COM_port, BAUD_RATE, READ_TIMEOUT, WRITE_TIMEOUT,2)))
{
    LWakeUpStatus.Text = "Failde to wake up FOB";
}

此函数的C++头文件：

birdRS232WakeUp(int nGroupID, BOOL bStandAlone, int nNumDevices,
                WORD *pwComport, DWORD dwBaudRate, DWORD dwReadTimeout,
                DWORD dwWriteTimeout, int nGroupMode = GMS_GROUP_MODE_ALWAYS);

手册指出“pwComport”指向一个单词数组，每个单词都是连接到其中一只鸟的COM端口的编号（例如，COM1=1、COM2=2等）

更新1：

我采纳了乔治老人的建议，但问题仍然存在。我不得不将C代码更改为以下代码

[DllImport(@"Bird.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern bool birdRS232WakeUp(int nGroupID, Boolean  bStandAlone, int nNumDevices,
                                          ref ushort[] pwComport, uint dwBaudRate,
                                          uint dwReadTimeout, uint dwWriteTimeout);

ushort[] COM_port = new ushort[]{0,16,0,0,0};
if ((!birdRS232WakeUp(GROUP_ID, false, DEVCOUNT, ref COM_port, BAUD_RATE, READ_TIMEOUT, WRITE_TIMEOUT)))
{
    LWakeUpStatus.Text = "Failde to wake up FOB";
}

WORD COM_port[5] = {0,15,0,0,0}

if ((!birdRS232WakeUp(GROUP_ID,
    FALSE, // Not stand-alone
    DEVCOUNT, // Number of Devices
    COM_port, // COM Port
    BAUD_RATE, // BAUD
    READ_TIMEOUT,WRITE_TIMEOUT, // Reponses timeouts
    GMS_GROUP_MODE_ALWAYS)))
{
    printf("Can't Wake Up Flock!\n");
    Sleep(3000);
    exit(-1);}

public  static extern bool birdRS232WakeUp(int nGroupID, Boolean  bStandAlone, int nNumDevices,
                           ushort[] pwComport, uint dwBaudRate, uint dwReadTimeout,
                           uint dwWriteTimeout,int nGroupMode);

if ((!birdRS232WakeUp(GROUP_ID, false, DEVCOUNT, COM_port, BAUD_RATE, READ_TIMEOUT, WRITE_TIMEOUT,2)))
{
    LWakeUpStatus.Text = "Failde to wake up FOB";
}

顺便说一句，根据下面的枚举类型，int nGroupMode等于2

enum GroupModeSettings
{
    //    GMS_DEFAULT,         // Driver will determine whether or not to use RS232 group mode.
    GMS_GROUP_MODE_NEVER,      // RS232 group mode will never be used
    GMS_GROUP_MODE_ALWAYS,     // RS232 group mode will always be used
    NUM_GROUP_MODE_SETTINGS
};

---

不确定这些要点是否能解决您的问题，但：

1）

pwComport

应声明为

ushort[]pwComport

，而不是

ref-ushort[]pwComport

---

2） 您需要从C#传递

nGroupMode

参数。如果使用C#4，可以将其设置为默认值，但不要忽略它。

双方都同意。另外，确保<代码> DeCuth< /Cord>具有正确的价值。对于初学者，是否有任何适当的网站或教程将C++的DLL导入到C Spple中？你能和我分享吗？很抱歉我很无力处理这类问题。好吧，首先，有。它有很多标准函数签名和一些文章的链接。此外，考虑使用可以生成C语言和C++语言的包装器，包括C语言。在我接受El DeldGyg建议之后，它工作了，但是最后我遇到了其他问题。如果你不介意，请再帮我进去。谢谢。（）如果连接混合模式或本机调试器并在birdRS232WakeUp上设置bkpt，是否会调用它？参数是否符合预期？