蓝桥杯之单片机学习（二十）——自创模板（最少省三，实现初始化、数码管显示、HC138独立按键（或矩阵键盘））

#include <STC15F2K60S2.h>
#define uchar unsigned char
#define uint unsigned int
uchar code SMG_duanma[18] = 
  {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,
  0x88,0x80,0xc6,0xc0,0x86,0x8e,
  0xbf,0x7f};//分别是0-9（对应下标），A-F，“-”，“.”
//分别是“0.-9.”
uchar code SMG_Dot_AC[10] = 
  {0X40,0X79,0X24,0X30,0X19,0X12,0X02,0X78,0X00,0X10};
//系统初始化
void Initsys();
//配置HC138
void SelectHC138(uchar channel);
//在pos位码上，显示value段码
void DisplaySMG_Bit(uchar pos, uchar value);
//数码管8位码显示
void SMG_Display();
//数码管的延时
void Delay_one_ms_SMG();
//独立按键(BTN)
void Alone_Key();
//按键消抖延时
void Delay_five_ms_Key();
//矩阵键盘(KBD)
void Matrix_Key();
void main()
{
  Initsys();
  while(1)
  {
  Matrix_Key();
  //Alone_Key();
  //SMG_Display();
  }
}
//矩阵键盘(KBD)
void Matrix_Key()
{
  uchar temp;
  //第一列
  P3 = 0X7F;P44 = 0; P42 = 1;
  temp = P3;
  temp = temp & 0X0F;
  if(temp != 0X0F)
  {
  Delay_five_ms_Key();
  temp = P3;
  temp = temp & 0X0F;
  if(temp != 0X0F)
  {
    temp = P3;
    switch(temp)
    {
    case 0X7E:
      DisplaySMG_Bit(0, SMG_duanma[1]);
    break;
    case 0X7D:
      DisplaySMG_Bit(1, SMG_duanma[1]);
    break;
    case 0X7B:
      DisplaySMG_Bit(2, SMG_duanma[1]);
    break;
    case 0X77:
      DisplaySMG_Bit(3, SMG_duanma[1]);
    break;
    }
    while(temp != 0X0F)
    {
    temp = P3;
    temp = temp & 0X0F;
    }
  }
  }
  //第二列
  P3 = 0XBF;P44 = 1; P42 = 0;
  temp = P3;
  temp = temp & 0X0F;
  if(temp != 0X0F)
  {
  Delay_five_ms_Key();
  temp = P3;
  temp = temp & 0X0F;
  if(temp != 0X0F)
  {
    temp = P3;
    switch(temp)
    {
    case 0XBE:
      DisplaySMG_Bit(0, SMG_duanma[2]);
    break;
    case 0XBD:
      DisplaySMG_Bit(1, SMG_duanma[2]);
    break;
    case 0XBB:
      DisplaySMG_Bit(2, SMG_duanma[2]);
    break;
    case 0XB7:
      DisplaySMG_Bit(3, SMG_duanma[2]);
    break;
    }
    while(temp != 0X0F)
    {
    temp = P3;
    temp = temp & 0X0F;
    }
  }
  }
  //第三列
  P3 = 0XDF;P44 = 1; P42 = 1;
  temp = P3;
  temp = temp & 0X0F;
  if(temp != 0X0F)
  {
  Delay_five_ms_Key();
  temp = P3;
  temp = temp & 0X0F;
  if(temp != 0X0F)
  {
    temp = P3;
    switch(temp)
    {
    case 0XDE:
      DisplaySMG_Bit(0, SMG_duanma[3]);
    break;
    case 0XDD:
      DisplaySMG_Bit(1, SMG_duanma[3]);
    break;
    case 0XDB:
      DisplaySMG_Bit(2, SMG_duanma[3]);
    break;
    case 0XD7:
      DisplaySMG_Bit(3, SMG_duanma[3]);
    break;
    }
    while(temp != 0X0F)
    {
    temp = P3;
    temp = temp & 0X0F;
    }
  }
  }
  //第四列
  P3 = 0XEF;P44 = 1; P42 = 1;
  temp = P3;
  temp = temp & 0X0F;
  if(temp != 0X0F)
  {
  Delay_five_ms_Key();
  temp = P3;
  temp = temp & 0X0F;
  if(temp != 0X0F)
  {
    temp = P3;
    switch(temp)
    {
    case 0XEE:
      DisplaySMG_Bit(0, SMG_duanma[4]);
    break;
    case 0XED:
      DisplaySMG_Bit(1, SMG_duanma[4]);
    break;
    case 0XEB:
      DisplaySMG_Bit(2, SMG_duanma[4]);
    break;
    case 0XE7:
      DisplaySMG_Bit(3, SMG_duanma[4]);
    break;
    }
    while(temp != 0X0F)
    {
    temp = P3;
    temp = temp & 0X0F;
    }
  }
  }
}
//按键消抖延时
void Delay_five_ms_Key()
{
  uint i,j;
  for(i = 0; i < 5; i++)
  for(j = 845; j > 0; j--);
}
//独立按键(BTN)
void Alone_Key()
{
  //S7按键
  if(P30 == 0)
  {
  Delay_five_ms_Key();
  if(P30 == 0)
  {
    DisplaySMG_Bit(0, SMG_duanma[0]);
  }
  while(!P30);
  }
  //S6按键
  else if(P31 == 0)
  {
  Delay_five_ms_Key();
  if(P31 == 0)
  {
    DisplaySMG_Bit(1, SMG_duanma[1]);
  }
  while(!P31);
  }
  //S5按键
  else if(P32 == 0)
  {
  Delay_five_ms_Key();
  if(P32 == 0)
  {
    DisplaySMG_Bit(2, SMG_duanma[2]);
  }
  while(!P32);
  }
  //S4按键
  else if(P33 == 0)
  {
  Delay_five_ms_Key();
  if(P33 == 0)
  {
    DisplaySMG_Bit(3, SMG_duanma[3]);
  }
  while(!P33);
  }
}
//配置HC138
void SelectHC138(uchar channel)
{
  switch(channel)
  {
  case 4:    //LED
    P2 = (P2 & 0X1F) | 0X80;
  break;
  case 5:    //蜂鸣器和继电器
    P2 = (P2 & 0X1F) | 0Xa0;
  break;
  case 6:    //位码
    P2 = (P2 & 0X1F) | 0Xc0;
  break;
  case 7:    //段码
    P2 = (P2 & 0X1F) | 0Xe0;
  break;
  case 0:    //锁住所有寄存器
    P2 = (P2 & 0X1F) | 0X00;
  break;
  }
}
//系统初始化
void Initsys()
{
  SelectHC138(5);
  P0 = 0X00;//关闭蜂鸣器和继电器
  SelectHC138(4);
  P0 = 0XFF;//关闭LED
  SelectHC138(6);
  P0 = 0XFF; //选择所有数码管
  SelectHC138(7);
  P0 = 0XFF; //关闭所有数码管
}
//在pos位码上，显示value段码
void DisplaySMG_Bit(uchar pos, uchar value)
{
  SelectHC138(6);
  P0 = 0X01 << pos;
  SelectHC138(7);
  P0 = value;
}
//数码管8位码显示
void SMG_Display()
{
  DisplaySMG_Bit(0, SMG_duanma[0]);
  Delay_one_ms_SMG();
  DisplaySMG_Bit(1, SMG_duanma[1]);
  Delay_one_ms_SMG();
  DisplaySMG_Bit(2, SMG_duanma[2]);
  Delay_one_ms_SMG();
  DisplaySMG_Bit(3, SMG_duanma[3]);
  Delay_one_ms_SMG();
  DisplaySMG_Bit(4, SMG_duanma[4]);
  Delay_one_ms_SMG();
  DisplaySMG_Bit(5, SMG_duanma[5]);
  Delay_one_ms_SMG();
  DisplaySMG_Bit(6, SMG_duanma[6]);
  Delay_one_ms_SMG();
  DisplaySMG_Bit(7, SMG_duanma[7]);
  Delay_one_ms_SMG();
}
//数码管的延时
void Delay_one_ms_SMG()
{
  uint j;
  for(j = 845; j > 0; j--);
}