WarlockFish/30dayMakeOS
1
0
Fork 0
forked from backup/30dayMakeOS
Code Pull Requests Activity

Add 11 day code

Browse Source
This commit is contained in:
Yourtion
2016-04-15 10:39:45 +08:00
parent 819aa38f4e
commit 005f8bd0c3
18 changed files with 6161 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
11_day/mouse.c Normal file
View File

@@ -0,0 +1,70 @@
/* 鼠标控制代码 */
#include "bootpack.h"
struct FIFO8 mousefifo;
void inthandler2c(int *esp) {
/* 来自PS/2鼠标的中断 */
unsigned char data;
io_out8(PIC1_OCW2, 0x64); /* 通知PIC IRQ-12 已经受理完毕 */
io_out8(PIC0_OCW2, 0x62); /* 通知PIC IRQ-02 已经受理完毕 */
data = io_in8(PORT_KEYDAT);
fifo8_put(&mousefifo, data);
return;
}
#define KEYCMD_SENDTO_MOUSE 0xd4
#define MOUSECMD_ENABLE 0xf4
void enable_mouse(struct MOUSE_DEC *mdec) {
/* 鼠标有效 */
wait_KBC_sendready();
io_out8(PORT_KEYCMD, KEYCMD_SENDTO_MOUSE);
wait_KBC_sendready();
io_out8(PORT_KEYDAT, MOUSECMD_ENABLE);
/* 顺利的话，ACK(0xfa)会被送过来 */
mdec->phase = 0; /* 等待0xfa的阶段 */
return;
}
int mouse_decode(struct MOUSE_DEC *mdec, unsigned char dat) {
if (mdec->phase == 0) {
/* 等待鼠标的0xfa的阶段 */
if (dat == 0xfa) {
mdec->phase = 1;
}
return 0;
}
if (mdec->phase == 1) {
/* 等待鼠标第一字节的阶段 */
mdec->buf[0] = dat;
mdec->phase = 2;
return 0;
}
if (mdec->phase == 2) {
/* 等待鼠标第二字节的阶段 */
mdec->buf[1] = dat;
mdec->phase = 3;
return 0;
}
if (mdec->phase == 3) {
/* 等待鼠标第二字节的阶段 */
mdec->buf[2] = dat;
mdec->phase = 1;
mdec->btn = mdec->buf[0] & 0x07;
mdec->x = mdec->buf[1];
mdec->y = mdec->buf[2];
if ((mdec->buf[0] & 0x10) != 0) {
mdec->x |= 0xffffff00;
}
if ((mdec->buf[0] & 0x20) != 0) {
mdec->y |= 0xffffff00;
}
/* 鼠标的y方向与画面符号相反 */
mdec->y = - mdec->y;
return 1;
}
/* 应该不可能到这里来 */
return -1;
}