GetCommTimeouts 函数失败，错误代码为 50
当我开发PCIe通信接口时，我使用了CreateFile & Readfile函数来操作设备。但是当我尝试为句柄设置超时时，我遇到了以下问题，这是我的代码，
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 函数工作正常，但是当我想获取其超时设置时，它返回错误代码 50。
有人有想法吗？谢谢！
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!
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最后我通过改变driver中的设置参数解决了这个问题，实现了与SetCommTimeouts()相同的功能
Finally, I solved this problem by changing the setting parameters in driver to achieve the same function as SetCommTimeouts()