MouseDecoder Class Reference

Decoder for mouse codes received from the PS2Controller. More...

#include <machine/mousedecoder.h>

Collaboration diagram for MouseDecoder:

Classes
union	MousePacket
	Structure of first packet. More...
struct	MousePacket.__unnamed58__

Public Member Functions
bool	decode (unsigned char code)
	Decode the mouse packets.

Public Attributes
Pointer	state
	Current position and state of the mouse.

Private Attributes
unsigned	cycle = 0
	Next packet in cycle.
MousePacket	status
	Content of last received status packet.

Detailed Description

Decoder for mouse codes received from the PS2Controller.

Extracts the mouse movements and button events.

Movements are reported with at least a 3-byte packet, depending on the extension (scroll wheel etc) sometimes more (but not handled here).

Bit	7	6	5	4	3	2	1	0
Byte 1	Y ovf	X ovf	Y sgn	X sgn	1	M btn	R btn	L btn
Byte 2	X Movement
Byte 3	Y Movement
Byte 4	(ignored if present)

See also

The PS/2 Mouse Interface

Member Function Documentation

decode()

bool MouseDecoder::decode

(

unsigned char

code

)

Decode the mouse packets.

Parameters

code	Byte from Keyboard to decode

Returns

true if a 3-byte-packet was successfully decoded.

Optional:

Implement method

Member Data Documentation

cycle

unsigned MouseDecoder::cycle = 0

private

Next packet in cycle.

status

MousePacket MouseDecoder::status

private

Content of last received status packet.

state

Pointer MouseDecoder::state

Current position and state of the mouse.

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The documentation for this class was generated from the following files:

• machine/mousedecoder.h
• machine/mousedecoder.cc