Action
Configures the PS2 mouse data and clock pins.
Syntax
CONFIG PS2EMU= int , DATA = data, CLOCK=clock
Remarks
Int |
The interrupt used such as INT0 or INT1. |
DATA |
The pin that is connected to the DATA line. This must be the same pin as the used interrupt. |
CLOCK |
The pin that is connected to the CLOCK line. |
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5-pin DIN (AT/XT):
1 - Clock 2 - Data 3 - Not Implemented 4 - Ground 5 - +5v |
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6-pin Mini-DIN (PS/2):
1 - Data 2 - Not Implemented 3 - Ground 4 - +5v 5 - Clock 6 - Not Implemented |
Old PC’s are equipped with a 5-pin DIN female connector. Newer PC’s have a 6-pin mini DIN female connector.
The male sockets must be used for the connection with the micro.
Besides the DATA and CLOCK you need to connect from the PC to the micro, you need to connect ground. You can use the +5V from the PC to power your microprocessor.
The config statement will setup an ISR that is triggered when the INT pin goes low. This routine you can find in the library.
The ISR will retrieve a byte from the PC and will send the proper commands back to the PC.
The SENDSCAN and PS2MOUSEXY statements allow you to send mouse commands.
Note that the mouse emulator is only recognized after you have booted your PC. Mouse devices can not be plugged into your PC once it has booted. Inserting a mouse or mouse device when the PC is already booted, may damage your PC.
See also
Example
'-----------------------------------------------------------------------------------------
'name : ps2_emul.bas
'copyright : (c) 1995-2021, MCS Electronics
'purpose : PS2 Mouse emulator
'micro : 90S2313
'suited for demo : NO, commercial addon needed
'commercial addon needed : yes
'-----------------------------------------------------------------------------------------
$regfile = "2313def.dat" ' specify the used micro
$crystal = 4000000 ' used crystal frequency
$baud = 19200 ' use baud rate
$hwstack = 32 ' default use 32 for the hardware stack
$swstack = 10 ' default use 10 for the SW stack
$framesize = 40 ' default use 40 for the frame space
$lib "mcsbyteint.lbx" ' use optional lib since we use only bytes
'configure PS2 pins
Config Ps2emu = Int1 , Data = Pind.3 , Clock = Pinb.0
' ^------------------------ used interrupt
' ^----------- pin connected to DATA
' ^-- pin connected to clock
'Note that the DATA must be connected to the used interrupt pin
Waitms 500 ' optional delay
Enable Interrupts ' you need to turn on interrupts yourself since an INT is used
Print "Press u,d,l,r,b, or t"
Dim Key As Byte
Do
Key = Waitkey() ' get key from terminal
Select Case Key
Case "u" : Ps2mousexy 0 , 10 , 0 ' up
Case "d" : Ps2mousexy 0 , -10 , 0 ' down
Case "l" : Ps2mousexy -10 , 0 , 0 ' left
Case "r" : Ps2mousexy 10 , 0 , 0 ' right
Case "b" : Ps2mousexy 0 , 0 , 1 ' left button pressed
Ps2mousexy 0 , 0 , 0 ' left button released
Case "t" : Sendscan Mouseup ' send a scan code
Case Else
End Select
Loop
Mouseup:
Data 3 , &H08 , &H00 , &H01 ' mouse up by 1 unit