2020. 3. 18. 22:08ㆍ카테고리 없음
You aren't using the same file handle for read/write/select, which is somewhat strange.You are not resetting your fdsets, which are modified by select and would have all of your fds unset in the case of a timeout, making the next call timeout by default (as you are asking for no fds).you are also using buffered IO, which is bound to create headaches in this case. Fgets waits for either EOF (which won't occur), or a newline, reading all the while.
It will block until it gets its newline, so may keep you hanging indefinitely if that never occurs.It may also read more than it needs into the buffer, messing up your select read signal (you have data in the buffer, but select will time out, since there's nothing to read on the filehandle).Bottom line is this:. use FDSET in the loop to set/reset your fd sets, also reset your timeout, as select may modify it. use a single handle for read/write/select, instead of multiple handles, eg. Open file with fopen(., 'w+') or open(., ORDWR). if still using fopen, try disabling buffering using setvbuf with the IONBF buffering option.
Please Connect Sigmakey/box
otherwise, use open/ read/ write instead of fopen etc.I will note that part of this was mentioned in to your previous question.
Sigmakey Download
In Windows XP, you will need to open the Control Panel, open System, go to the Hardware tab, and click the button for Device Manager.In Device Manager, I'm guessing that Logic will show up right away as an unknown device with a warning icon next to it. Right-click this and select Update Driver.Select the second option for 'Browse my computer for driver software.' Use the Browse button to direct the driver wizard to the Drivers folder, which is located where the Logic software was installed. Make sure the 'Include Subfolders' checkbox is checked. It's VERY important to select the correct product. Selecting the wrong product will cause our software to download the wrong firmware image, causing undefined behavior.There is some naming confusion here that I would like to clear up.If you purchased the Logic 4, the Logic Pro 8, or the Logic Pro 16, please select the driver that matches the product name.If you purchased the new Logic 8, our logic 8 channel logic analyzer with digital and analog, released in September 2014, please use the driver 'Saleae Logic 8 USB Logic Analyzer' and NOT the driver 'Saleae Logic USB Logic Analyzer.' If you have the original Logic unit, 8 channel, digital only, discontinued in mid-2014, please select 'Saleae Logic USB Logic Analyzer' and not the one with the number 8.The original Logic 16, also discontinued in 2014, uses the 'Saleae Logic 16 USB Logic Analyzer' driver and NOT the pro version.