PS2 Overview
These routines make it easier to communicate with a PS/2 device, particularly an external keyboard.
Relevant Constants
These constants affect the operation of the PS/2 routines:
| Constant Name | Controls | Default Value |
|---|---|---|
|
|
Pin connected to PS/2 data line |
Must be specified |
|
|
Pin connected to PS/2 clock line. |
Must be specified |
|
|
This constant can be set to a delay, such as 10 ms. If set, a delay will be added at the end of every byte sent or received. |
Not set |
Connections between the Keyboard and the Microcontroller The following diagram show a typical connection between the keyboard and the microcontroller. The value of R1 and R2 is typically 4.7k for a 5v system.
