蓝桥杯之单片机学习（二十九）——第十三届蓝桥杯单片机第二场（超声波未实现）

#include <STC15F2K60S2.h>
#include "iic.h"
#define uchar unsigned char
#define uint unsigned int
uchar SMG_duanma[10] = {0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8, 0x80, 0x90};
uchar yi,er,san,si,wu,liu,qi,ba;
float real_high_limit_dianya = 4.5;
float real_low_limit_dianya = 0.5;
float low_limit_dianya = 0.5;
float high_limit_dianya = 4.5;
sbit L1 = P0^0;
sbit L2 = P0^1;
sbit L3 = P0^2;
sbit L8 = P0^7;
uchar tt = 0;
uchar t = 0;
uchar miao = 0;
//界面参数
uchar Mode = 0;
//上限下限切换
uchar Mode_limit_high_low = 0;
//连续测距
uchar continue_check_juli = 0;
//超声波距离参数（固定）
uchar juli = 45;
//138译码器
void SelectHC138(uchar channel);
//初始化
void Initsys();
void SMG_Bit(uchar pos, uchar value);
void Delay_one_ms();
//SMG展示
void SMG_Display();
void Delay_five_ms();
void Alone_Key();
//电压界面
void Display_Mode_dianya();
//参数界面
void Display_Mode_canshu();
//测距界面
void Display_Mode_ceju();
//LED显示
void LED_Display();
void Timer0Init(void);  //5毫秒@12.000MHz
void L8_light();
void main()
{
  Initsys();
  Timer0Init();
  while(1)
  {
  if(Mode == 0)
  {
    Display_Mode_dianya();
  }
  else if(Mode == 1)
  {
    Display_Mode_canshu();
  }
  else if(Mode == 2)
  {
    Display_Mode_ceju();
  }
  SMG_Display();
  Alone_Key();
  LED_Display();
  L8_light();
  }
}
void L8_light()
{
  float Rb2_dianya;
  Rb2_dianya = Read_ADC_Rb2() * 0.01963;
  if(Rb2_dianya >= real_low_limit_dianya && real_high_limit_dianya >= Rb2_dianya)
  {
  continue_check_juli = 1;
  Write_DAC(136);
  }
  else
  {
  continue_check_juli = 0;
  Write_DAC(0);
  }
}
//LED显示
void LED_Display()
{
  P0 = 0XFF;
  if(Mode == 0)
  {
  SelectHC138(4);
  L1 = 0;
  L2 = 1;
  L3 = 1;
  }
  else if(Mode == 1)
  {
  SelectHC138(4);
  L1 = 1;
  L2 = 0;
  L3 = 1;
  }
  else if(Mode == 2)
  {
  SelectHC138(4);
  L1 = 1;
  L2 = 1;
  L3 = 0;
  }
}
//电压界面
void Display_Mode_dianya()
{
  unsigned long Rb2_dianya;
  Rb2_dianya = Read_ADC_Rb2() * 0.01963 * 100;
  yi = 0XC1;
  er = san = si = wu = 0XFF;
  liu = SMG_duanma[Rb2_dianya / 100] - 0X80;
  qi = SMG_duanma[Rb2_dianya % 100 / 10];
  ba = SMG_duanma[Rb2_dianya % 10];
}
//参数界面
void Display_Mode_canshu()
{
  if(Mode_limit_high_low == 0)
  {
  yi = 0X8C;
  er = san = liu = 0XFF;
  if(miao == 0)
  {
    si = SMG_duanma[(uint)high_limit_dianya] - 0X80;
    wu = SMG_duanma[(uint)(high_limit_dianya * 10) % 10];
  }
  else if(miao != 0)
  {
    si = 0XFF;
    wu = 0XFF;
  }
  qi = SMG_duanma[(uint)low_limit_dianya] - 0X80;
  ba = SMG_duanma[(uint)(low_limit_dianya * 10) % 10];
  }
  else if(Mode_limit_high_low == 1)
  {
  yi = 0X8C;
  er = san = liu = 0XFF;
  si = SMG_duanma[(uint)high_limit_dianya] - 0X80;
  wu = SMG_duanma[(uint)(high_limit_dianya * 10) % 10];
  if(miao == 0)
  {
  qi = SMG_duanma[(uint)low_limit_dianya] - 0X80;
  ba = SMG_duanma[(uint)(low_limit_dianya * 10) % 10];
  }
  else if(miao != 0)
  {
    qi = ba = 0XFF;
  }
  }
}
//测距界面
void Display_Mode_ceju()
{
  float Rb2_dianya;
  Rb2_dianya = Read_ADC_Rb2() * 0.01963;
  if(Rb2_dianya >= real_low_limit_dianya && real_high_limit_dianya >= Rb2_dianya)
  {
  yi = 0XC3;
  er = san = si = wu = liu = 0XFF;
  qi = SMG_duanma[juli / 10];
  ba = SMG_duanma[juli % 10];
  continue_check_juli = 1;
  Write_DAC(136);
  }
  else
  {
  yi = 0XC3;
  er = san = si = wu = 0XFF;
  liu = qi = ba = 0X88;
  continue_check_juli = 0;
  Write_DAC(0);
  }
}
//138译码器
void SelectHC138(uchar channel)
{
  switch(channel)
  {
  case 4:
    P2 = (P2 & 0X1F) | 0X80;
  break;
  case 5:
    P2 = (P2 & 0X1F) | 0XA0;
  break;
  case 6:
    P2 = (P2 & 0X1F) | 0XC0;
  break;
  case 7:
    P2 = (P2 & 0X1F) | 0XE0;
  break;
  }
}
//初始化
void Initsys()
{
  SelectHC138(4);
  P0 = 0XFF;
  SelectHC138(5);
  P0 = 0X00;
  SelectHC138(6);
  P0 = 0XFF;
  SelectHC138(7);
  P0 = 0XFF;
}
void SMG_Bit(uchar pos, uchar value)
{
  SelectHC138(6);
  P0 = 0X01 << pos;
  SelectHC138(7);
  P0 = value;
}
void Delay_one_ms()
{
  uint i;
  for(i = 845; i > 0; i--);
}
//SMG展示
void SMG_Display()
{
  SMG_Bit(0,yi);
  Delay_one_ms();
  SMG_Bit(1,er);
  Delay_one_ms();
  SMG_Bit(2,san);
  Delay_one_ms();
  SMG_Bit(3,si);
  Delay_one_ms();
  SMG_Bit(4,wu);
  Delay_one_ms();
  SMG_Bit(5,liu);
  Delay_one_ms();
  SMG_Bit(6,qi);
  Delay_one_ms();
  SMG_Bit(7,ba);
  Delay_one_ms();
}
void Delay_five_ms()
{
  uint i,j;
  for(j = 0; j < 5; j++)
  for(i = 845; i > 0; i--);
}
void Alone_Key()
{
  //S7
  if(P30 == 0)
  {
  Delay_five_ms();
  if(P30 == 0)
  {
    if(Mode == 1 && Mode_limit_high_low == 0 && high_limit_dianya != 0.5)
    {
    high_limit_dianya = high_limit_dianya - 0.5;
    }
    else if(Mode == 1 && Mode_limit_high_low == 1 && low_limit_dianya != 0.5)
    {
    low_limit_dianya = low_limit_dianya - 0.5;
    }
  }
  while(!P30);
  }
  //S6
  if(P31 == 0)
  {
  Delay_five_ms();
  if(P31 == 0)
  {
    if(Mode == 1 && Mode_limit_high_low == 0 && (uint)high_limit_dianya != 5)
    {
    high_limit_dianya = high_limit_dianya + 0.5;
    }
    else if(Mode == 1 && Mode_limit_high_low == 1 && (uint)low_limit_dianya != 5)
    {
    low_limit_dianya = low_limit_dianya + 0.5;
    }
  }
  while(!P31);
  }
  //S5
  if(P32 == 0)
  {
  Delay_five_ms();
  if(P32 == 0)
  {
    if(Mode == 1)
    {
    if(Mode_limit_high_low == 0)Mode_limit_high_low = 1;
    else if(Mode_limit_high_low == 1)Mode_limit_high_low = 0;
    }
  }
  while(!P32);
  }
  //S4
  if(P33 == 0)
  {
  Delay_five_ms();
  if(P33 == 0)
  {
    if(Mode == 0){Mode = 1;Mode_limit_high_low = 0;high_limit_dianya = real_high_limit_dianya;low_limit_dianya = real_low_limit_dianya;}
    else if(Mode == 1){Mode = 2;real_high_limit_dianya = high_limit_dianya;real_low_limit_dianya = low_limit_dianya;}
    else if(Mode == 2){Mode = 0;continue_check_juli = 0;}
  }
  while(!P33);
  }
}
void Timer0Init(void)  //5毫秒@12.000MHz
{
  AUXR |= 0x80;  //定时器时钟1T模式
  TMOD &= 0xF0;  //设置定时器模式
  TL0 = 0xA0;  //设置定时初值
  TH0 = 0x15;  //设置定时初值
  TF0 = 0;  //清除TF0标志
  TR0 = 1;  //定时器0开始计时
  ET0 = 1;
  EA = 1;
}
void Timer0Server() interrupt 1
{
  tt++;
  t++;
  if(tt == 20)
  {
  if(continue_check_juli == 1)
  {
    P0 = 0XFF;
    SelectHC138(4);
    L8 = ~L8;
  }
  tt = 0;
  }
  if(t == 90)
  {
  if(Mode == 1)
  {
    miao = ~miao;
  }
  t = 0;
  }
}

#include "iic.h"
#define DELAY_TIME 5
//I2C总线内部延时函数
void IIC_Delay(unsigned char i)
{
    do{_nop_();}
    while(i--);        
}
//I2C总线启动信号
void IIC_Start(void)
{
    SDA = 1;
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SDA = 0;
    IIC_Delay(DELAY_TIME);
    SCL = 0;  
}
//I2C总线停止信号
void IIC_Stop(void)
{
    SDA = 0;
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SDA = 1;
    IIC_Delay(DELAY_TIME);
}
//发送应答或非应答信号
void IIC_SendAck(bit ackbit)
{
    SCL = 0;
    SDA = ackbit;       
    IIC_Delay(DELAY_TIME);
    SCL = 1;
    IIC_Delay(DELAY_TIME);
    SCL = 0; 
    SDA = 1;
    IIC_Delay(DELAY_TIME);
}
//等待应答
bit IIC_WaitAck(void)
{
    bit ackbit;
    SCL  = 1;
    IIC_Delay(DELAY_TIME);
    ackbit = SDA;
    SCL = 0;
    IIC_Delay(DELAY_TIME);
    return ackbit;
}
//I2C总线发送一个字节数据
void IIC_SendByte(unsigned char byt)
{
    unsigned char i;
    for(i=0; i<8; i++)
    {
        SCL  = 0;
        IIC_Delay(DELAY_TIME);
        if(byt & 0x80) SDA  = 1;
        else SDA  = 0;
        IIC_Delay(DELAY_TIME);
        SCL = 1;
        byt <<= 1;
        IIC_Delay(DELAY_TIME);
    }
    SCL  = 0;  
}
//I2C总线接收一个字节数据
unsigned char IIC_RecByte(void)
{
    unsigned char i, da;
    for(i=0; i<8; i++)
    {   
      SCL = 1;
  IIC_Delay(DELAY_TIME);
  da <<= 1;
  if(SDA) da |= 1;
  SCL = 0;
  IIC_Delay(DELAY_TIME);
    }
    return da;    
}
float Read_ADC_Rb2()
{
  float dat;
  IIC_Start();
  IIC_SendByte(0X90);
  IIC_WaitAck();
  IIC_SendByte(0X03); //进入Rb2
  IIC_WaitAck();
  IIC_Start();
  IIC_SendByte(0X91);
  IIC_WaitAck();
  dat = IIC_RecByte();
  IIC_SendAck(1);
  IIC_Stop();
  return dat;
}
void Write_DAC(unsigned char dat)
{
  IIC_Start();
  IIC_SendByte(0X90);
  IIC_WaitAck();
  IIC_SendByte(0X40);
  IIC_WaitAck();
  IIC_SendByte(dat);
  IIC_WaitAck();
  IIC_Stop();
}

#ifndef __IIC_H__
#define __IIC_H__
#include <STC15F2K60S2.h>
#include "intrins.h"
sbit SDA = P2^1;
sbit SCL = P2^0;
void IIC_Start(void); 
void IIC_Stop(void);  
bit IIC_WaitAck(void);  
void IIC_SendAck(bit ackbit); 
void IIC_SendByte(unsigned char byt); 
unsigned char IIC_RecByte(void); 
float Read_ADC_Rb2();
void Write_DAC(unsigned char dat);
#endif