设定多个定时器

12_day/bootpack.c

@@ -8,7 +8,9 @@ void make_window8(unsigned char *buf, int xsize, int ysize, char *title);
 void HariMain(void)
 {
 	struct BOOTINFO *binfo = (struct BOOTINFO *) ADR_BOOTINFO;
-	char s[40], keybuf[32], mousebuf[128];
+	struct FIFO8 timerfifo, timerfifo2, timerfifo3;
+	char s[40], keybuf[32], mousebuf[128], timerbuf[8], timerbuf2[8], timerbuf3[8];
+	struct TIMER *timer, *timer2, *timer3;
 	int mx, my, i;
 	unsigned int memtotal;
 	struct MOUSE_DEC mdec;
@@ -20,13 +22,25 @@ void HariMain(void)
 	init_gdtidt();
 	init_pic();
 	io_sti(); /* IDT/PIC的初始化已经完成，于是开放CPU的中断 */
-
 	fifo8_init(&keyfifo, 32, keybuf);
 	fifo8_init(&mousefifo, 128, mousebuf);
 	init_pit();
 	io_out8(PIC0_IMR, 0xf8); /* PIT和PIC1和键盘设置为许可(11111000) */
 	io_out8(PIC1_IMR, 0xef); /* 开放鼠标中断(11101111) */
 
+	fifo8_init(&timerfifo, 8, timerbuf);
+	timer = timer_alloc();
+	timer_init(timer, &timerfifo, 1);
+	timer_settime(timer, 1000);
+	fifo8_init(&timerfifo2, 8, timerbuf2);
+	timer2 = timer_alloc();
+	timer_init(timer2, &timerfifo2, 1);
+	timer_settime(timer2, 300);
+	fifo8_init(&timerfifo3, 8, timerbuf3);
+	timer3 = timer_alloc();
+	timer_init(timer3, &timerfifo3, 1);
+	timer_settime(timer3, 50);
+
 	init_keyboard();
 	enable_mouse(&mdec);
 	memtotal = memtest(0x00400000, 0xbfffffff);
@@ -68,7 +82,7 @@ void HariMain(void)
 		sheet_refresh(sht_win, 40, 28, 120, 44); /* 到这里结束 */
 
 		io_cli();
-		if (fifo8_status(&keyfifo) + fifo8_status(&mousefifo) == 0) {
+		if (fifo8_status(&keyfifo) + fifo8_status(&mousefifo) + fifo8_status(&timerfifo) + fifo8_status(&timerfifo2) + fifo8_status(&timerfifo3)== 0) {
 			io_sti(); /* 不做HLT */
 		} else {
 			if (fifo8_status(&keyfifo) != 0) {
@@ -117,6 +131,28 @@ void HariMain(void)
 					sheet_refresh(sht_back, 0, 0, 80, 16); /* 刷新文字 */
 					sheet_slide(sht_mouse, mx, my); /* 包含sheet_refresh含sheet_refresh */
 				}
+			} else if (fifo8_status(&timerfifo) != 0) {
+				i = fifo8_get(&timerfifo); /* 首先读入（为了设定起始点） */
+				io_sti();
+				putfonts8_asc(buf_back, binfo->scrnx, 0, 64, COL8_FFFFFF, "10[sec]");
+				sheet_refresh(sht_back, 0, 64, 56, 80);
+			} else if (fifo8_status(&timerfifo2) != 0) {
+				i = fifo8_get(&timerfifo2); /* 首先读入（为了设定起始点） */
+				io_sti();
+				putfonts8_asc(buf_back, binfo->scrnx, 0, 80, COL8_FFFFFF, "3[sec]");
+				sheet_refresh(sht_back, 0, 80, 48, 96);
+			} else if (fifo8_status(&timerfifo3) != 0) {
+				i = fifo8_get(&timerfifo3); /* 首先读入（为了设定起始点） */
+				io_sti();
+				if (i != 0) {
+					timer_init(timer3, &timerfifo3, 0); /* 然后设置0 */
+					boxfill8(buf_back, binfo->scrnx, COL8_FFFFFF, 8, 96, 15, 111);
+				} else {
+					timer_init(timer3, &timerfifo3, 1); /* 然后设置1 */
+					boxfill8(buf_back, binfo->scrnx, COL8_008484, 8, 96, 15, 111);
+				}
+				timer_settime(timer3, 50);
+				sheet_refresh(sht_back, 8, 96, 16, 112);
 			}
 		}
 	}

12_day/bootpack.h

@@ -169,10 +169,22 @@ void sheet_slide(struct SHEET *sht, int vx0, int vy0);
 void sheet_free(struct SHEET *sht);
 
 /* timer.c */
+#define MAX_TIMER 500
+struct TIMER {
+	unsigned int timeout, flags;
+	struct FIFO8 *fifo;
+	unsigned char data;
+};
 struct TIMERCTL {
 	unsigned int count;
+	struct TIMER timer[MAX_TIMER];
 };
 extern struct TIMERCTL timerctl;
 
 void init_pit(void);
+struct TIMER *timer_alloc(void);
+void timer_free(struct TIMER *timer);
+void timer_init(struct TIMER *timer, struct FIFO8 *fifo, unsigned char data);
+void timer_settime(struct TIMER *timer, unsigned int timeout);
 void inthandler20(int *esp);
+

12_day/timer.c

@@ -4,21 +4,69 @@
 
 #define PIT_CTRL 0x0043
 #define PIT_CNT0 0x0040
+#define TIMER_FLAGS_ALLOC 1 /* 已配置状态 */
+#define TIMER_FLAGS_USING 2 /* 定时器运行中 */
 
 struct TIMERCTL timerctl;
 
 void init_pit(void)
 {
-	io_out8(PIT_CTRL, 0x43);
+	int i;
+	io_out8(PIT_CTRL, 0x34);
 	io_out8(PIT_CNT0, 0x9c);
 	io_out8(PIT_CNT0, 0x2e);
 	timerctl.count = 0;
+	for (i = 0; i < MAX_TIMER; i++) {
+		timerctl.timer[i].flags = 0; /* 未使用 */
+	}
+	return;
+}
+
+struct TIMER *timer_alloc(void)
+{
+	int i;
+	for (i = 0; i < MAX_TIMER; i++) {
+		if (timerctl.timer[i].flags == 0) {
+			timerctl.timer[i].flags = TIMER_FLAGS_ALLOC;
+			return &timerctl.timer[i];
+		}
+	}
+	return 0; /* 没找到 */
+}
+
+void timer_free(struct TIMER *timer)
+{
+	timer->flags = 0; /* 未使用 */
+	return;
+}
+
+void timer_init(struct TIMER *timer, struct FIFO8 *fifo, unsigned char data)
+{
+	timer->fifo = fifo;
+	timer->data = data;
+	return;
+}
+
+void timer_settime(struct TIMER *timer, unsigned int timeout)
+{
+	timer->timeout = timeout;
+	timer->flags = TIMER_FLAGS_USING;
 	return;
 }
 
 void inthandler20(int *esp)
 {
+	int i;
 	io_out8(PIC0_OCW2, 0x60); /* 把IRQ-00信号接收完了的信息通知给PIC */
 	timerctl.count++;
+	for (i = 0; i < MAX_TIMER; i++) {
+		if (timerctl.timer[i].flags == TIMER_FLAGS_USING) {
+			timerctl.timer[i].timeout--;
+			if (timerctl.timer[i].timeout == 0) {
+				timerctl.timer[i].flags = TIMER_FLAGS_ALLOC;
+				fifo8_put(timerctl.timer[i].fifo, timerctl.timer[i].data);
+			}
+		}
+	}
 	return;
 }