原创 基于SP1010-LPC213X-ARM实验板的键按键加减计数实验

发布时间:2010-10-14 来 源:西谱电子(www.supermcu.com)

/*
      实验目的：掌握LPC213X对两个按键识别的编程方法
      实验内容：通过连接在LPC2132引脚上的P0.16和P0.14引脚上的按键实现对计数值的加1和减1操作
      实验平台：SP1010-LPC213X-ARM实验开发板,FOSC=12MHZ->CCLK=60MHZ,PCLK=CCLK/4
      更多内容：www.supermcu.com (西谱电子)
*/
#include <LPC213X.H>

#define ADD_KEY 16
#define SUB_KEY 14

int main(void)
{
  long i;
  unsigned char KeyCounter = 0x80;

  IO1DIR |= (0xFF << 16);
  IO1CLR |= (0xFF << 16);
  IO1SET |= (~KeyCounter << 16);

  while(1)
    {
      if(0 == (IO0PIN & (1 << ADD_KEY)))
        {
          for(i=0;i<5000;i++)
          if(0 == (IO0PIN & (1 << ADD_KEY)))
            {
              KeyCounter ++;
              IO1CLR |= (0xFF << 16);
              IO1SET |= (~KeyCounter << 16);
              while(0 == (IO0PIN & (1 << ADD_KEY)));
            }
        }
      if(0 == (IO0PIN & (1 << SUB_KEY)))
        {
          for(i=0;i<5000;i++)
          if(0 == (IO0PIN & (1 << SUB_KEY)))
            {
              KeyCounter --;
              IO1CLR |= (0xFF << 16);
              IO1SET |= (~KeyCounter << 16);
              while(0 == (IO0PIN & (1 << SUB_KEY)));
            }
        }
    }
}
/*
      更多内容：www.supermcu.com (西谱电子)
*/