:new: 实现简单的读取键盘数据的功能

kernel/common/printk.c

@@ -346,21 +346,20 @@ static int vsprintf(char *buf, const char *fmt, va_list args)
             if (qualifier == 'l')
                 ip = va_arg(args, long long *);
             else
-                ip = (ll*)va_arg(args, int *);
+                ip = (ll *)va_arg(args, int *);
 
             *ip = str - buf;
             break;
         case 'f':
             // 默认精度为3
-                //printk("1111\n");
-                //va_arg(args, double);
-                //printk("222\n");
-                
+            //printk("1111\n");
+            //va_arg(args, double);
+            //printk("222\n");
+
             if (precision < 0)
                 precision = 3;
-                str = write_float_point_num(str, va_arg(args, double), field_width, precision, flags);
-               
-            
+            str = write_float_point_num(str, va_arg(args, double), field_width, precision, flags);
+
             break;
 
         //对于不识别的控制符，直接输出
@@ -402,12 +401,11 @@ static char *write_num(char *str, ull num, int base, int field_width, int precis
     if (flags & SMALL)
         digits = "0123456789abcdefghijklmnopqrstuvwxyz";
 
-    if(flags&LEFT)
+    if (flags & LEFT)
         flags &= ~PAD_ZERO;
     // 设置填充元素
     pad = (flags & PAD_ZERO) ? '0' : ' ';
 
-
     sign = 0;
     if (flags & SIGN && num < 0)
     {
@@ -451,7 +449,7 @@ static char *write_num(char *str, ull num, int base, int field_width, int precis
     field_width -= precision;
 
     // 靠右对齐
-    if (!(flags & (LEFT+PAD_ZERO)))
+    if (!(flags & (LEFT + PAD_ZERO)))
         while (field_width-- > 0)
             *str++ = ' ';
 
@@ -465,8 +463,8 @@ static char *write_num(char *str, ull num, int base, int field_width, int precis
         }
         else if (base == 8)
             *str++ = digits[24]; //注意这里是英文字母O或者o
-    if(!(flags&LEFT))
-        while(field_width-->0)
+    if (!(flags & LEFT))
+        while (field_width-- > 0)
             *str++ = pad;
     while (js_num < precision)
     {

kernel/exception/irq.c

@@ -126,6 +126,20 @@ void init_irq()
  */
 void do_IRQ(ul rsp, ul number)
 {
+    unsigned char x;
+    switch (number)
+    {
+    case 0x20:  // 时钟中断信号
+        
+        break;
+    case 0x21:  // 键盘中断
+        
+        x = io_in8(0x60);
+        printk_color(ORANGE, BLACK, "Received key irq, key code:%#018lx\n", x);
+        break;
+    default:
+        break;
+    }
     if(number!=0x20)
     printk_color(ORANGE, BLACK, "Received irq:%#018x\n", number);
 

kernel/main.c

@@ -116,7 +116,6 @@ void Start_Kernel(void)
     test_mm();
 
     //test_printk();
-
     //int t = 1 / 0; // 测试异常处理模块能否正常工作 触发除法错误
     // int t = *(int *)0xffff80000aa00000; // 触发页故障