'GetCommTimeouts function failed with error code 50

when I develop a PCIe communication interface, I used CreateFile & Readfile function to operate the device. But when I tried to set timeout to the handle, I met the following problem and this is my code,

    HANDLE* device;
    char device_path_process[MAX_PATH+1] = "";
    ...
    
    *device = CreateFile(device_path_process, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);
    if (*device == INVALID_HANDLE_VALUE) {
        std::cout<< std::to_string(GetLastError()) << std::endl;
        status = 2;
        goto Exit;
    }
    COMMTIMEOUTS cto;
    if(!GetCommTimeouts(*device, &cto)) {
        std::cout<< std::to_string(GetLastError()) << std::endl;
        status = 3;
        goto Exit;
    }

CreateFile function worked normally, but when I want to get its timeout setting, it return error code 50.

Does anyone has ideas? Thanks!

c++winapiserial-porttimeoutcreatefile


Solution 1:[1]

Finally, I solved this problem by changing the setting parameters in driver to achieve the same function as SetCommTimeouts()

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Lyon

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