Share on Facebook. Pin Configuration of Serial Port: Serial port have total 9 pins. The purpose of pin 1 is Data Carrier Detect. It is used to detect the data stream which is being carried bu the buses for sending to other devices or for receiving. The purpose of this pin is to monitor the data which is received by serial port from some external means. The purpose of this pin is to transmit data from serial port to the external module, where we wish to send data.
Remember that serial port only transmit data at the rate of one bit per second. The purpose of this pin is to see the data which is to transmit but it has not been sent yet. The data is available at the sending port of serial port and it needs the go signal from micro processor. This pin is used to determine the data transmission rate. Data is available at the port but it has not been sent yet. This pin is the signal for sending the data to external means.
When data is available at pin 3 of the serial port and to send this data you have to get permission from control circuit and pin 7 which is in fact RTS pin does this job. It is known as Clear to send. When pin 7 gets requests to send the data and if it gets the permission then data is now ready to send and pin 8 sends it in serial manner. Applications and Usage of Serial Port: Serial port possess a large no of practical applications and usage.
Biggest application of serial ports is that they are used to connect to modems. LCD and flat screen monitors are used to connect to the computers through this serial port device. Some devices which are used for network sharing are also connected through this serial port.
Some networking devices are like firewalls and rotors etc. Serial port is also used in special applications of GPS global positioning system and they are used either to send data or to receive data in serial manner. Also used for scanning bar codes of different products. Mostly serial port is used in some big shops and markets to detect which product you are selling. Serial port sends or receive data in a serial manner, so they are also used in some applications where you wish to display some text on a particular LCD.
It works, but it still has some flaws. Timing is really important in this project and sometimes mouse drivers seem not to get a response in time from the adapter. Usually just executing the driver once again will initialize the mouse. If you test the adapter with a mouse, which is not in this list please consider to submit a report to improve the compatibility of the adapter.
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View code. How to use? How does it work? Jumper Settings There are two jumpers, which can be used to set different modes. Tested Mice If you test the adapter with a mouse, which is not in this list please consider to submit a report to improve the compatibility of the adapter. The adapters are passive, they rely on the uC in the mouse to detect if it is on a PS2 or serial connection.
If it is a newer PS2 mouse that does not support it then you might need something. Though at that point I would probably just use a Teensy with USB bus master to convert to serial instead of relying on a almost as obsolete PS2 mouse. They behave differently, and so a mouse can detect what it is connected to based on the initial behavior of the three interfaces. For example, if both lines are high for over uS, then it is not USB. The host will respond to a query.
Anyway, yes, a microcontroller in the mouse that knows this and that can reconfigure its data pins is certainly capable of talking to any such host, as long as the appropriate mechanical connector adapters are used. In some cases, the adapter might have resistors to serve as pullups or pulldowns PS2 to USB, for example but in general are passive.
Once it gets one, it knows without a doubt what it is connected to. Thus requires a transceiver. Yes, agreed, the PHY signaling is different between the three interfaces. Internal resistor network I would venture to guess. Which indicates a failure to set an industry standard, like so many things built on top of USB. There are patents in this space I hold a couple of them. Incompatible adapters that solve the same problem differently for no good reason other than to avoid infringement. Using that scheme, you can use the IP for free but must do it in the same way for the license to apply.
Any takers? Oh well. I have the same username there. Came here to say this. I also have a few of those weird Apple mice. My mice always end up broken eventually, either the plastic or the PCB. The cable too but those I just fix. If I look hard enough I still have my first mouse.
A Microsoft serial mouse with two green buttons and a DB25 connector. A none of those wimpy optical or rubber balls. Solid steel nothing less. Pre Windows 3. It came a package deal with MS Word. I have a green eyed mouse. At DPI, though, it requires only a full meter of desk space to travel across my 4K monitor…. Did this with a keyboard. Had an old mechanical keyboard that I loved and used for years.
Back in the old days ? HTM Cant locate any video from that keynote, maybe Microsoft enforced no filming rule after their Comdex BSOD live on stage performance : I even have one of the original Intellimouse Explorers, sadly unusable, 17 year old scroll wheel rubber is seeping elastomer?
I built such a converter around an Attiny about 4 or 5 years ago. I thought I was a hoarder. I guess not. I have long since disposed of all those mouse adapter dongles. I do however still have one of the very first Microsoft Optical Wheel mice pre-Intellimouse from and it still works perfectly. However, other than retro-computing or a museum, why would you still be rocking Win 3. No, wait.
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