这是我的代码。err一直是2
int _tmain(int argc, _TCHAR* argv[])
{
HANDLE HandlePort = CreateFile(L"COM5", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
if (HandlePort == INVALID_HANDLE_VALUE)
{
printf("串口打开失败\n");
int err = GetLastError();
printf("%d", err);
}
while (true);
return 0;
}