117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
#include <stdio.h>
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#include <debugio.h>
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#include "mouse.h"
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#include "../keyboard/keyboard.h"
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uint8 MouseCycle = 0;
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uint8 MouseCycleExpected = 3;
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uint8 Packets[4];
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Point MousePosition = {0,0};
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Point MouseMinimumPosition = {0,0}, MouseMaximumPosition = {80, 25};
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Point Prev = {0,0};
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#define SpeedLimit 0x8
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// IRQ12
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void MouseHandler (_RegsStack32* UNUSED(r))
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{
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uint8 data = inportb(0x60);
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Point delta;
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if (MouseCycle == 0 && (data == 0 || data == 0xFA || data == 0xFF || data == 0xAA)) return;
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Packets[MouseCycle++] = data;
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// Cycle ended
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if (MouseCycle >= MouseCycleExpected)
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{
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MouseCycle = 0;
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if (Packets[0] & 0xC0) return; // Discard packet
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// Update X position
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if (Packets[0] & 0x10) delta.X = (int32) (Packets[1] | 0xFFFFFF00);
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else delta.X = (int32) Packets[1];
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// Update Y position
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if (Packets[0] & 0x20) delta.Y = -1 * (int32) (Packets[2] | 0xFFFFFF00);
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else delta.Y = -1 * (int32)Packets[2];
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if (delta.X >= SpeedLimit) delta.X = SpeedLimit;
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if (delta.X <= -SpeedLimit) delta.X = -SpeedLimit;
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if (delta.Y >= SpeedLimit) delta.Y = SpeedLimit;
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if (delta.Y <= -SpeedLimit) delta.Y = -SpeedLimit;
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MousePosition.X += delta.X;
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MousePosition.Y += delta.Y;
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// Check limits
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if (MousePosition.X < MouseMinimumPosition.X) MousePosition.X = MouseMinimumPosition.X;
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if (MousePosition.Y < MouseMinimumPosition.Y) MousePosition.Y = MouseMinimumPosition.Y;
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if (MousePosition.X >= MouseMaximumPosition.X) MousePosition.X = MouseMaximumPosition.X - 1;
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if (MousePosition.Y >= MouseMaximumPosition.Y) MousePosition.Y = MouseMaximumPosition.Y - 1;
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/* TESTING ONLY */
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ConsoleSetColor(Prev, 0xFF - ConsoleGetColor(Prev));
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ConsoleSetColor(MousePosition, 0xFF - ConsoleGetColor(MousePosition));
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Prev = MousePosition;
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}
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}
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void MouseSendCommand(uint8 command)
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{
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KeyboardWaitOutport();
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outportb(0x64, 0xD4);
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KeyboardWaitOutport();
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outportb(0x60, command);
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}
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uint8 MouseReadData ()
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{
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KeyboardWaitInport();
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return inportb(0x60);
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}
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void MouseInstall()
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{
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KeyboardWaitOutport();
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outportb(0x64, 0xA8);
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// Enable interrupts
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KeyboardWaitOutport();
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outportb(0x64, 0x20);
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KeyboardWaitInport();
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uint8 temp = inportb(0x60) | 2;
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temp &= ~0x20;
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KeyboardWaitOutport();
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outportb(0x64, 0x60);
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KeyboardWaitOutport();
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outportb(0x60, temp);
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// Reset mouse, and enable it
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MouseSendCommand(MouseCommandReset);
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MouseReadData(); MouseReadData();
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MouseSendCommand(MouseCommandSetDefaults);
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MouseReadData(); // Read ack
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MouseSendCommand(MouseCommandEnableDataReporting);
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MouseReadData(); // Read ack
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}
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void MouseSetLimits (Point min_pos, Point max_pos)
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{
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MouseMinimumPosition = min_pos;
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MouseMaximumPosition = max_pos;
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}
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MouseState MouseGetState()
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{
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MouseState ret = { Packets[0] & 0x7, MousePosition};
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return ret;
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}
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