2020. 3. 22. 18:28ㆍ카테고리 없음
I have about 8 different usb - serial adapters that I have bought over the years, all of them are from different manufacturers. Some work with Windows 7 32/64 some don't. By looking inside the adapters I found out that they all contain one of these 3 processor chips: FTDI, Prolific and Silicon Labs. The FTDI chip works perfectly with all versions of Windows, the Silicon Labs works mostly fine too. No serious troubles, only sometimes Windows can't open the port in the first try and I have to restart. Prolific is the one that is most unreliable. Sometimes it works with Windows 7 sometimes not.
I have never been able to find out why. It simply just don't respond sometimes.
I never had an adapter with the WCH processor mentioned earlier in this thread, but that will probably be the next I will buy and test. Hard Drives WDC WD3200BEVT-22A23T0 3 partitions S/N W -DXW167AM03248 Size 298.09 GB Internet Speed 6690 Antivirus Avast Pro Browser Firefox 28 Other Info Sound: Card 1 - Microsoft High Definition Audio Device Card 2 - High Definition Audio Device Card 3 - High Definition Audio Device Card 4 - NVIDIA Virtual Audio Device (Wave Extensible) (WDM) Card 5 - NVIDIA High Definition Audio Card 6 - NVIDIA High Definition Audio VideoController1 - NVIDIA GeForce GT 425M Video Processor - GeForce GT 425M Video Driver Version - 9. Okay, I have had a living nightmare trying to get a Prolific USB-RS232 Serial adapter working with my Labview program. I just solved the problem and thought I would share my experience in case it may help others.
The story begins when I bought a Trendnet TU-S9 USB adapter that uses the Prolific PL2303 driver. When I first installed the USB-Serial adapter, it showed up as COM3 an everything worked great. My labview program was able to communicate properly with a syringe pump I was controlling. I made the silly mistake of unplugging the USB to serial adapter and plugging it back in.
This is when everything went to hell. Everytime I would plug in the adapter the COM port number changed. My Labview program could no longer access the device, even when I programatically entered the correct COM number. I kept getting an error in labview indicating that the VISA resource is valid but the program cannot access the resource. I was not aware of any other programs utilizing the COM ports. I tried connecting to the COM using hyperterminal and kept getting an error stating ' Another program is using the selected telephony device.
Try again after the program completes '. I was not able to open the COM port with Hyperterminal. After some intense web searching, I came across a lot of posts about how these drivers are complete crap and they are very finicky about how they are installed. I tried every version of the driver I could find and still no luck. Fustrated, I ended up buying a FTDI based USB-Serial adapter cable (Model USA-FTDI-A12). Still no luck.
I got the same error in Hyperterminal. Clearly this was not a hardware or driver issue.
I even downloaded a different emulator program (Teraterm) which was unable connect to the COM ports (prolific or FTDI adapters). I downloaded another program called Portmon ( a serial port monitoring program). This program was not able to open the COM ports either, indicating they are in use. I started to suspect that there actually was another program that was disrupting the USB communications or hogging the COM port. Next, I downloaded a program called Process Explorer to try and find out what was using my COM port.
At first I could not find the specific virtual COM ports or Devices when searching handles in process explorer. Out of curiosity, i searched simply for 'USB'.
Process explorer brought up a process called SacReminder.exe that seemed to be utilizing almost 10 of the USB ports. This process is for a Clickfree backup hard drive that I use. I killed the process and tried Portmon and Teraterm again. It finally worked and I can use my syringe pump.
Everything is back to normal and I have a newfound hatred for Clickfree. Unfortunatley, i do not know enough about computers to understand why things suddenly went wrong, but this might give some idea to others about how to approach problems with these USB-serial adapters. Anyone else having problems with their USB-Serial, I would definetly figure out how to use Portman and Process explorer to determine what 3rd party programs might be interfering with your adapters. Thanks to many numerous people on the internet for their suggestions (too many to name). Similar help and support threads Thread Forum Hardware ID = USB VID067B&PID2303 I have been all over the internet looking for a driver that works with this device.
I am running Windows 7 Ultimate RTM 64-Bit. Every driver that I have found that will 'work' absolutely does not work. Any ideas on a working driver? Drivers I have researched the Prolific USB-to-Serial driver issues.
There's loads of information and mis-information regarding the Prolific chips, the counterfeit chips, and various driver versions. I've installed several different versions including 3.2.0.0 (7/31/2007), 3.3.2.105 , 3.3.11.152. Drivers Hello Some time ago I started to get BSOD.
I am almost sure part of them related to Prolific USB to serial i start to use. But i am afraid latest 2 are of some other origin. I tried different Prolific drivers, some of them do not start to work at all.
SFvadim7ti.zip (840.4 KB) Any. BSOD Help and Support Hi there I have 2 cables witch is ”usb to seriel” One of the cables installes fine with the “prolific” driver.
The other cable does not work. According to the manufactor both of the cables should work on that prolific driver. Drivers I have just finished a new build Intel i3 on a Gigabyte GA-H55M-UD2H mobo running Windows 7. Both the PCI slots are vacant and I have no need of them. However, I have a device identified as 'Prolific USB to COMM port (COM 6)' which infuriatingly loads no driver. I tried downloading the Prolific. Hardware & Devices Our Sites Site Links About Us Find Us.
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