Mikroelektronika MIKROE-350 Fiche De Données

The mikroBasic PRO for AVR provides a library for communication with the common
PS/2 keyboard.

Note: The library does not utilize interrupts for data retrieval, and requires the oscil-
lator clock to be at least 6MHz.

Note: The pins to which a PS/2 keyboard is attached should be connected to the
pull-up resistors.

Note: Although PS/2 is a two-way communication bus, this library does not provide
MCU-to-keyboard communication; e.g. pressing the Caps Lock key will not turn on
the Caps Lock LED.

- Ps2_Config 
- Ps2_Key_Read 

302

- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

dim PS2_Data as sbit
sfr external

PS/2 Data line.

dim PS2_Data as sbit
at PINC.B0

dim PS2_In_Clock as
sbit sfr external

PS/2 Clock line in.

dim PS2_In_Clock as
sbit at PINC.B1

dim PS2_Out_Clock as
sbit sfr external

PS/2 Clock line out.

dim PS2_Out_Clock as
sbit at PORTC.B0

dim
PS2_Data_Direction 

Direction of the PS/2 Data
pin.

dim
PS2_Data_Direction 

sbit at DDRC.B0

dim
PS2_Clock_Direction
as sbit sfr external

Direction of the PS/2
Clock pin.

dim
PS2_Clock_Direction
as sbit at DDRC.B1