cos2000v2/lib/mouse.c

#include "types.h"
#include "asm.h"
#include "mouse.h"
#include "keyboard.h"
#include "vga.h"
#include "video.h"

bool initmouse()
{
u16 i=1024;

outkbd(0x64,0xA8);         /* autoris<69> Aux */

outmseack(0xf3);         /*sample*/ 
outmseack(100);          /*sample donn<6E>e*/ 

outmseack(0xe8);         /*resolution*/ 
outmseack(3);           /*resolution donn<6E>e*/ 

outmseack(0xe7);         /* echelle 2:1*/ 

outmseack(0xf4);         /* Autorise peripherique */ 

outmsecmd(0x47);         /* Autorise interruption */ 

while(i-->0) if (inb(0x60)==250) return 1;
return 0;
}

static  u8  bytepos=0,mousereplies=0;
static  u8  mpacket[3];
static  s32 mousex=40, mousey=12;
static  u16 oldx=0, oldy=0;
static  u8  oldchar=0x00,oldattr=0x07;
static  bool mousebut1=0,mousebut2=0,mousebut3=0;
static  u8  speed=6;


void outmseack(u8 value)
{
outkbd(0x64,0xD4);         /* ecriture vers souris */
outb(0x60,value);
mousereplies++;
}

void outmsecmd(u8 command)
{
outkbd(0x64,0x60);         /* ecriture vers mode */
outb(0x60,command);
}

void mouse()
{
u8 mbyte=inb(0x60);
s8 changex,changey;
cli();

  if (mousereplies > 0) 
  {
    if (mbyte == 0xFA) 
    {
      mousereplies--;
      goto endofint;
    }
    mousereplies = 0;
  }

        mpacket[bytepos]=mbyte;
        bytepos++;
        
if(bytepos==3) {     
bytepos=0;
if ( mpacket[1] == 0)
    {
      changex = 0;
    }
    else
    {
      changex = (mpacket[0] & 0x10) ?
        mpacket[1] - 256 :
        mpacket[1];
    }
    if (mpacket[2] == 0)
    {
      changey = 0;
    }
    else
    {
      changey = -((mpacket[0] & 0x20) ?
                    mpacket[2] - 256 :
                    mpacket[2]);
    }

    mousex+= (changex<<speed);
    mousey+= (changey<<speed);    
    
    if(mousex<0) { mousex=0; }
    if(mousex>=65535) { mousex=65535; }
    if(mousey<0) { mousey=0; }
    if(mousey>=65535) { mousey=65535; }
       
   u16 newx=(u32)mousex*getxres()/65536;
   u16 newy=(u32)mousey*getyres()/65536;         

    // Retrieve mouse button status from packet
    mousebut1=mpacket[0] & 1;
    mousebut2=mpacket[0] & 2;
    mousebut3=mpacket[0] & 4;
    
// printf("RX:%d\tRY:%d\tX:%d\tY:%d\tB1:%d\tB2:%d\tB3:%d\t\r\n",changex,changey,mousex,mousey,mousebut1,mousebut2,mousebut3);

if ((newx!=oldx)||(newy!=oldy))
{
 showchar(oldx,oldy,oldchar,oldattr); 
 oldx=newx;
 oldy=newy; 
 oldchar=getchar(oldx,oldy);
 oldattr=getattrib(oldx,oldy);
 showchar(newx,newy,0xDB,0x0F);
}
}
endofint:
irqendmaster();
irqendslave();
sti();
//asm("movl 0x2C(%esp), %ebx;movl 0x30(%esp), %esi;movl 0x34(%esp), %edi;movl 0x38(%esp), %ebp;addl  $0x3C, %esp;iret;");
asm(
"addl  $0x18,%esp;\
popl %bx;\
iret;");
}