昨晚老大出个题目，让10分钟做完，结果我想了半个小时……

只看该作者 · 2013-9-6 17:18

时间问题，相信LZ会搞出来的

1万 · 2013-9-6 23:16

本帖最后由 yklstudent 于 2013-9-6 23:18 编辑

不知道有没有理解楼主的意思
我就是先开的灯  关也是先关
后开的灯也是后关

typedef struct
{
INT8U led_state0:1;
INT8U led_state1:1;
INT8U led_state2:1;
INT8U led_state3:1;
INT8U led_state4:1;
INT8U led_state5:1;
INT8U led_state6:1;
INT8U led_state7:1;
}LED_BIT;
typedef union
{
LED_BIT led_bit;
INT8U led_state;
}LED_STATE;
typedef struct
{
INT8U left_count;
INT8U right_count;
INT8U length;
LED_STATE led_value;
}FUN_STATE;

void Task1(void)
{
switch ( Key_Value )
{
  case KV_UP:
  {
   fun_state.led_value.led_bit.led_state0 ^= 1;
if ( !fun_state.led_value.led_bit.led_state0 )
{
fun_state.led_value.led_state &= 0xF0;
fun_state.left_count = 0;
fun_state.right_count = 0;
}
break;
  }
  case KV_DN:
  {
if ( fun_state.led_value.led_bit.led_state0 )
{
if( (fun_state.left_count < 3) )
{
   fun_state.length ++;
   fun_state.left_count ++;
   fun_state.led_value.led_state |= _BV(fun_state.left_count);
   if ( fun_state.left_count == 3 )
   {
   fun_state.left_count = 0;
   }
}
}
break;
  }
  case KV_LF:
  {
if ( (fun_state.led_value.led_bit.led_state0) && (fun_state.length!=0) )
{
if( (fun_state.right_count <= fun_state.length+1) )
{
   if (fun_state.length!=0)
   fun_state.length --;
   fun_state.right_count ++;
   fun_state.led_value.led_state &= ~_BV(fun_state.right_count);
   if ( fun_state.right_count == 3 )
   {
   fun_state.right_count = 0;
   }
}
}
break;
  }
  case KV_MD:
  {
break;
  }
  default:
break;
}
Key_Value = KV_NO;
}

void Task2(void)
{
LedPort = fun_state.led_value.led_state;
}