This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

How to make an AT keyboard using 89C51.

Can anyone please help me how can I make a keyboard for my computer using 89C51. I must tell you the I want to make a device that can generate some keycodes itself on PS/2 and that will connect to the PC to perform some specific task for a little time only. i.e. there will be no KEY connected to the 89C51, it will work automatically and will type a few letters and then quit typing. I've seaarched the AT keyboard interfacing, and used the Mode 2 (9-bit UART mode) of 89C51 to implement the protocol, but I am unable to transmit any code to the PC.
Please help.

Parents Reply Children