有一个约3ms的低电平

2万 · 2018-8-9 16:02

我买了个JET51仿真器+SH79F166板，用C写了个很简单程序，用P0.0为输出，驱动一个LED，P0.1口为按键输入，设置了P0CR和P0PCR两个寄存器。奇怪的是，P0.1-P0.7的脚会有一个约3ms的低电平出了，系统复位。请指教。谢谢！

2万 · 2018-8-9 16:05

/*4MHZ¾§Õñ*/
#include<SH79F166.h>
#define uchar unsigned char
#define uint unsigned int
sbit key=P0^1;       //°´¼ü¶¨Òå
sbit led=P0^0;       //ledÊä³ö¿Ú¶¨Òå
uchar b;             //¶¨ÒåÒ»¸ö×´Ì¬±êÖ¾

void delay(uint ms)//ÑÓÊ±º¯Êý
{
      uint i,j;
      for(i=ms;i>0;i--)
               for(j=21;j>0;j--);
}

void ledflash()//ledÏÔÊ¾º¯Êý
{
      if(b==1) //0.5ÃëÉÁÁÁ
      {
               led=~led;
               delay(500);
      }
      if(b==2)  //50mSÉÁÁÁ
      {
               led=~led;
               delay(50);
      }
      if(b==3)  //5mSÉÁÁÁ
      {
               led=~led;
               delay(5);
      }
      if(b==0)  //¹Ø±Õled
      {
               led=1;
      }
      if(b>3)       //»Øµ½ledÃð×´Ì¬
      {
               b=0;
      }
}

void main()
{
      P0CR=0x01;       //0000 0001 ÉèP0.0ÎªÊä³ö£¬P0.1ÎªÊäÈë
      P0PCR=0xFE;       //1111 1110 ÉèP0.1-0.7ÉÏÀµç×è
      led=1;                //¹ØLED
      b=0;
      while(1)
      {
               if(key==0)
               {
                        delay(1);
                        if(key==0)
                        {
                              b++;
                              while(key==0);
                        }
               }
               ledflash();       //ledÏÔÊ¾º¯Êý
      }
}

2万 · 2018-8-9 16:08

#include<SH79F166.h>
#define uchar unsigned char
#define uint unsigned int
sbit key=P0^1;       //°´¼ü¶¨Òå
sbit led=P0^0;       //ledÊä³ö¿Ú¶¨Òå
uchar b;             //¶¨ÒåÒ»¸ö×´Ì¬±êÖ¾

void delay(uint ms)//ÑÓÊ±º¯Êý
{
      uint i,j;
      for(i=ms;i>0;i--)
               for(j=21;j>0;j--)
                        RSTSTAT = 0;
}

void ledflash()//ledÏÔÊ¾º¯Êý
{
      if(b==1) //0.5ÃëÉÁÁÁ
      {
               led=~led;
               delay(500);
      }
      if(b==2)  //50mSÉÁÁÁ
      {
               led=~led;
               delay(50);
      }
      if(b==3)  //5mSÉÁÁÁ
      {
               led=~led;
               delay(5);
      }
      if(b==0)  //¹Ø±Õled
      {
               led=1;
      }
      if(b>3)       //»Øµ½ledÃð×´Ì¬
      {
               b=0;
      }
}

void main()
{
      P0CR=0x01;       //0000 0001 ÉèP0.0ÎªÊä³ö£¬P0.1ÎªÊäÈë
      P0PCR=0xFE;       //1111 1110 ÉèP0.1-0.7ÉÏÀ µç×è
      led=1;                //¹ØLED
      b=0;
      while(1)
      {
               if(key==0)
               {
                        delay(1);
                        if(key==0)
                        {
                              b++;
                              while(key==0) RSTSTAT = 0;
                        }
               }
               ledflash();       //ledÏÔÊ¾º¯Êý
               RSTSTAT = 0;
      }
}

2万 · 2018-8-9 16:18

唉，还是没有什么结果，算了，先结贴吧，多谢大家啦