CT107D 開發(fā)板上實現(xiàn)流水燈控制

ID:217409 · 發(fā)表于 2017-7-5 16:49

#include "reg52.h"  //定義51單片機特殊功能寄存器

unsigned char read_key(void);
void key_proc(unsigned char key);
void delay(void);

//
void cls_buzz()
{
P2 = (P2&0x1F|0xA0);
P0 = 0x00;
P2 &= 0x1F;
}

void cls_led()
{
P2 = (P2&0x1F|0x80);
P0 = 0xFF;
P2 &= 0x1F;
}

//主函數(shù)
void main(void)
{
unsigned char temp;

cls_buzz();
cls_led();

while(1)
{
      temp = read_key();
      if(temp != 0xff)
      {
         delay();  //按鍵消抖
         temp = read_key();
         if(temp != 0xff)
         {
            //進入按鍵處理函數(shù)
            key_proc(temp);
            while(P3 != 0xff);  //等待按鍵釋放
         }
      }
}
}

//按鍵掃描函數(shù)
unsigned char read_key(void)
{
unsigned char temp;
unsigned char key_value = 0xff;

temp = P3&0x0f;
switch(temp)
{
      case 0x0e:
         key_value = 1;  //S7
         break;
      case 0x0d:
         key_value = 2;  //S6
         break;
      case 0x0b:
         key_value = 3;  //S5
         break;
      case 0x07:
         key_value = 4;  //S4
         break;
}
return key_value;
}

//按鍵處理函數(shù)
void key_proc(unsigned char key)
{
switch(key)
{
      case 1:
P2 = (P2&0x1f|0x80);
P0++;
P2 &= 0x1f;
         break;
      case 2:
P2 = (P2&0x1f|0x80);
P0--;
P2 &= 0x1f;
      case 3:
P2 = (P2&0x1f|0x80);
P0 += 2;
P2 &= 0x1f;
         break;
      case 4:
P2 = (P2&0x1f|0x80);
P0 -= 2;
P2 &= 0x1f;
         break;
}
}

//延時函數(shù): 10ms@11.0592MHz
void delay(void)
{
unsigned char i, j;

i = 108;
j = 145;
do
{
while (--j);
} while (--i);
}

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