您好，我在使用C#调用WCHBLEDLL库，调用打开设备接口是得不到响应，MFC Demo可以成功。在此寻求帮助，谢谢
DLL 调用：
///
/// 连接状态委托
///
/// 设备句柄
/// 连接状态，0-断开、1-连接
[UnmanagedFunctionPointer(CallingConvention.StdCall)]
public delegate void FunDevConnChangeCallBack(IntPtr hDev, byte ConnectStatus);
///
/// 打开设备
///
/// 设备路径，可通过扫描设备获取
/// 上传设备状态的回调函数
///
[DllImport("WCHBLEDLL.dll", EntryPoint = "WCHBLEOpenDevice", SetLastError = true, CharSet = CharSet.Auto, ExactSpelling = false, CallingConvention = CallingConvention.StdCall)]
public static extern IntPtr WCHBLEOpenDevice(string DevID, FunDevConnChangeCallBack pFunDevConnChange);
逻辑代码：
public void BLEConnect(IntPtr hDev, byte connectState)
{
retInptr = hDev;
string hDevStr, stateStr;
hDevStr = Marshal.PtrToStringAnsi(hDev);
stateStr = connectState.ToString();
Console.WriteLine("设备句柄：" + Marshal.PtrToStringAnsi(hDev));
Console.WriteLine("连接状态：" + connectState);
if (stateStr == "1")
MessageBox.Show("设备句柄：" + hDevStr + ",连接状态：" + connectState);
else
MessageBox.Show("设备句柄：" + hDevStr + ",断开状态：" + connectState);
return;
}
[ThreadStatic]
private static BLE.FunDevConnChangeCallBack ConnChangeCallBack;
///
/// 设备句柄
///
IntPtr retInptr;
//连接蓝牙
private void button3_Click(object sender, EventArgs e)
{
retInptr = Marshal.AllocHGlobal(100);
try
{
//设备路径，可通过扫描设备获取
string devInfo = listBox1.SelectedItem.ToString().Split(',')[1];
ConnChangeCallBack = new BLE.FunDevConnChangeCallBack(BLEConnect);
retInptr = BLE.WCHBLEOpenDevice(devInfo, ConnChangeCallBack);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
不知道是否有C# Demo，或者可以给予帮助，谢谢
热门产品 :
CH592: RISC-V内核BLE5.4无线MCU
