cos2000v2/lib/mouse.c

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#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;");
}