如何获取串口名字

Question

串口操作，如何获取COM4前的串口名字（也就是STM32F10X CDC...这串东西）

Answer 1

上面的函数使用的是setupapi，记得要包含相应的头文件和库文件。还有，
SetupDiGetDeviceRegistryProperty 可以取得设备相关属性，例如设备名可以参考以下一个例子，需要改动一些地方。
#include <setupapi.h>   
#pragma comment(lib, "setupapi.lib")const GUID GUID_DEVINTERFACE_DISPLAY_ADAPTER = { 0x5b45201d, 0xf2f2, 0x4f3b, { 0x85, 0xbb,  0x30,  0xff,  0x1f,  0x95,  0x35,  0x99 } };long GetDisplayDeviceInfo(unsigned long nAdapterIndex, tagI2CDeviceStruct* pobjI2CDevice)
{
    pobjI2CDevice->nDisplayDeviceLength = 0;    HDEVINFO hDevInfoX = SetupDiGetClassDevs(&GUID_DEVINTERFACE_DISPLAY_ADAPTER, NULL, 0, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE); 
    if (hDevInfoX == INVALID_HANDLE_VALUE)   
    {   
        //printf("Failed to get device handle. Error[%d]", GetLastError());   
        return DVDC_ERR_GET_CLASS_DEV;   
    }   
    SP_DEVINFO_DATA DeviceInfoData;   
    //DWORD dwDeviceIndex;       // Enumerate through all devices in Set.   
    DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);   
    if (!SetupDiEnumDeviceInfo(hDevInfoX, nAdapterIndex, &DeviceInfoData))   
    { 
        SetupDiDestroyDeviceInfoList(hDevInfoX); 
        if (GetLastError() == ERROR_NO_MORE_ITEMS) 
            return DVDC_ERR_NOT_FOUND_DISPLAY_ADAPTER; 
        else
            return DVDC_ERR_FIND_DISPLAY_ADAPTER; 
    }     DWORD   DataT = 0;   
    DWORD   buffersize   =   0; 
    LPTSTR   buffer   =   NULL;       while(!SetupDiGetDeviceRegistryProperty(   
        hDevInfoX,   
        &DeviceInfoData,   
        SPDRP_PHYSICAL_DEVICE_OBJECT_NAME,   
        &DataT,   
        (PBYTE)buffer,   
        buffersize,   
        &buffersize))   
    {   
        if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)   
        {   
            //   Change   the   buffer   size.   
            if (buffer)   
                LocalFree(buffer);   
            buffer = (LPTSTR)LocalAlloc(LPTR,buffersize);   
        }   
        else   
        {   
            printf("Failed to get device guid. Error[%d] \n", GetLastError());   
            break;   
        }   
    }       if (buffer)   
    {
#ifdef _UNICODE
        int iMultiBytesLength = WideCharToMultiByte ( 
            CP_ACP,                    // ANSI 代码页                          
            WC_COMPOSITECHECK,        // 检查重音字符                          
            buffer,            // 原Unicode 串                          
            -1,                        // -1 意思是串以0x00结尾                          
            NULL,                    // 目的char字符串                          
            0,                        // 缓冲大小                          
            NULL,                    // 肥缺省字符串                          
            NULL);                    // 忽略这个参数        if (iMultiBytesLength <= 0)
        {
            SetupDiDestroyDeviceInfoList(hDevInfoX); 
            return DVDC_ERR_GET_DEVICE_PATH_LENGTH; 
        }        if (iMultiBytesLength > sizeof(pobjI2CDevice->pcDisplayDevicePath))
        {
            SetupDiDestroyDeviceInfoList(hDevInfoX); 
            return DVDC_ERR_DEVICE_PATH_LENGTH_SMALL; 
        }        WideCharToMultiByte ( 
            CP_ACP,                        // ANSI 代码页                          
            WC_COMPOSITECHECK,            // 检查重音字符                          
            buffer,                // 原Unicode 串                          
            -1,                            // -1 意思是串以0x00结尾                          
            pobjI2CDevice->pcDisplayDevicePath,            // 目的char字符串                          
            iMultiBytesLength,            // 缓冲大小                          
            NULL,                        // 肥缺省字符串                          
            NULL);                        // 忽略这个参数        //printf("  path:[%s]\n", pcResult);   
        pobjI2CDevice->nDisplayDeviceLength = iMultiBytesLength;
#else
        //MessageBox(NULL, "not unicode", "xxxx", MB_OK);
        if ((strlen(buffer) + 1) > sizeof(pobjI2CDevice->pcDisplayDevicePath))
        {
            SetupDiDestroyDeviceInfoList(hDevInfoX); 
            return DVDC_ERR_DEVICE_PATH_LENGTH_SMALL; 
        }        pobjI2CDevice->nDisplayDeviceLength = strlen(buffer) + 1;
        strcpy_s(pobjI2CDevice->pcDisplayDevicePath, sizeof(pobjI2CDevice->pcDisplayDevicePath), buffer);
        pobjI2CDevice->pcDisplayDevicePath[pobjI2CDevice->nDisplayDeviceLength] = 0;
#endif
    }    // Cleanup   
    SetupDiDestroyDeviceInfoList(hDevInfoX);   
    return DVDC_ERR_SUCCESS;
}