Mikroelektronika MIKROE-742 데이터 시트

The mikroPascal PRO for AVR provides a library for communication with the com-
mon 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 

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- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 6

var PS2_Data : sbit;
sfr; external;

PS/2 Data line.

var PS2_Data : sbit
at PINC.B0;

var PS2_In_Clock :
sbit; sfr; external;

PS/2 Clock line in.

var PS2_In_Clock :
sbit at PINC.B1;

var PS2_Out_Clock :
sbit; sfr; external;

PS/2 Clock line out.

var PS2_Out_Clock :
sbit at PORTC.B1;

var
PS2_Data_Direction :
sbit; sfr; external;

Direction of the PS/2 Data
pin.

var
PS2_Data_Direction :
sbit at DDRC.B0;

var
PS2_Clock_Direction :
sbit; sfr; external;

Direction of the PS/2
Clock pin.

var
PS2_Clock_Direction :
sbit at DDRC.B1;