从鼠标接收数据

07_day/bootpack.c

@@ -3,12 +3,14 @@
 #include "bootpack.h"
 #include <stdio.h>
 
-extern struct FIFO8 keyfifo;
+extern struct FIFO8 keyfifo, mousefifo;
+void enable_mouse(void);
+void init_keyboard(void);
 
 void HariMain(void)
 {
 	struct BOOTINFO *binfo = (struct BOOTINFO *) ADR_BOOTINFO;
-	char s[40], mcursor[256], keybuf[32];
+	char s[40], mcursor[256], keybuf[32], mousebuf[128];
 	int mx, my, i;
 
 	init_gdtidt();
@@ -16,9 +18,12 @@ void HariMain(void)
 	io_sti(); /* IDT/PICの初期化が終わったのでCPUの割り込み禁止を解除 */
 
 	fifo8_init(&keyfifo, 32, keybuf);
+	fifo8_init(&mousefifo, 128, mousebuf);
 	io_out8(PIC0_IMR, 0xf9); /* PIC1とキーボードを許可(11111001) */
 	io_out8(PIC1_IMR, 0xef); /* マウスを許可(11101111) */
 
+	init_keyboard();
+
 	init_palette();
 	init_screen8(binfo->vram, binfo->scrnx, binfo->scrny);
 	mx = (binfo->scrnx - 16) / 2; /* 计算画面中心坐标 */
@@ -28,16 +33,67 @@ void HariMain(void)
 	sprintf(s, "(%d, %d)", mx, my);
 	putfonts8_asc(binfo->vram, binfo->scrnx, 0, 0, COL8_FFFFFF, s);
 
+	enable_mouse();
+
 	for (;;) {
 		io_cli();
-		if (fifo8_status(&keyfifo) == 0) {
+		if (fifo8_status(&keyfifo) + fifo8_status(&mousefifo) == 0) {
 			io_stihlt();
 		} else {
-			i = fifo8_get(&keyfifo);
-			io_sti();
-			sprintf(s, "%02X", i);
-			boxfill8(binfo->vram, binfo->scrnx, COL8_008484, 0, 16, 15, 31);
-			putfonts8_asc(binfo->vram, binfo->scrnx, 0, 16, COL8_FFFFFF, s);
+			if (fifo8_status(&keyfifo) != 0) {
+				i = fifo8_get(&keyfifo);
+				io_sti();
+				sprintf(s, "%02X", i);
+				boxfill8(binfo->vram, binfo->scrnx, COL8_008484,  0, 16, 15, 31);
+				putfonts8_asc(binfo->vram, binfo->scrnx, 0, 16, COL8_FFFFFF, s);
+			} else if (fifo8_status(&mousefifo) != 0) {
+				i = fifo8_get(&mousefifo);
+				io_sti();
+				sprintf(s, "%02X", i);
+				boxfill8(binfo->vram, binfo->scrnx, COL8_008484, 32, 16, 47, 31);
+				putfonts8_asc(binfo->vram, binfo->scrnx, 32, 16, COL8_FFFFFF, s);
+			}
 		}
 	}
 }
+
+#define PORT_KEYDAT				0x0060
+#define PORT_KEYSTA				0x0064
+#define PORT_KEYCMD				0x0064
+#define KEYSTA_SEND_NOTREADY	0x02
+#define KEYCMD_WRITE_MODE		0x60
+#define KBC_MODE				0x47
+
+void wait_KBC_sendready(void)
+{
+	/* 等待键盘控制电路准备完毕 */
+	for (;;) {
+		if ((io_in8(PORT_KEYSTA) & KEYSTA_SEND_NOTREADY) == 0) {
+			break;
+		}
+	}
+	return;
+}
+
+void init_keyboard(void)
+{
+	/* 初始化键盘控制电路 */
+	wait_KBC_sendready();
+	io_out8(PORT_KEYCMD, KEYCMD_WRITE_MODE);
+	wait_KBC_sendready();
+	io_out8(PORT_KEYDAT, KBC_MODE);
+	return;
+}
+
+#define KEYCMD_SENDTO_MOUSE		0xd4
+#define MOUSECMD_ENABLE			0xf4
+
+void enable_mouse(void)
+{
+	/* 激活鼠标 */
+	wait_KBC_sendready();
+	io_out8(PORT_KEYCMD, KEYCMD_SENDTO_MOUSE);
+	wait_KBC_sendready();
+	io_out8(PORT_KEYDAT, MOUSECMD_ENABLE);
+	return; /* 顺利的话，键盘控制器会返回ACK(0xfa) */
+}

07_day/int.c

@@ -39,15 +39,17 @@ void inthandler21(int *esp)
 	return;
 }
 
+struct FIFO8 mousefifo;
+
 void inthandler2c(int *esp)
 /* 来自PS/2鼠标的中断 */
 {
-	struct BOOTINFO *binfo = (struct BOOTINFO *) ADR_BOOTINFO;
-	boxfill8(binfo->vram, binfo->scrnx, COL8_000000, 0, 0, 32 * 8 - 1, 15);
-	putfonts8_asc(binfo->vram, binfo->scrnx, 0, 0, COL8_FFFFFF, "INT 2C (IRQ-12) : PS/2 mouse");
-	for (;;) {
-		io_hlt();
-	}
+	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;
 }
 
 void inthandler27(int *esp)