蓝桥杯第十二届4t满分

yoyobravery

620人浏览 · 2026-04-05 08:07:26

yoyobravery · 2026-04-05 08:07:26 发布

main.c

#include <STC15F2K60S2.H>
#include <intrins.h>
#include <seg.h>
#include <ds18b20.h>
#include <key.h>
#include <pcf8591.h>
#include <led.h>

unsigned int seg_slow_down;//0-65535
unsigned char key_slow_down;
unsigned char key_down,key_old,key_val;

unsigned char segmode=0;
unsigned char ucled[8]={0,0,0,0,0,0,0,0};

unsigned char seg_pos;
unsigned char seg_buf[8]={10,10,10,10,10,10,10,10};
unsigned char seg_point[8]={0,0,0,0,0,0,0,0};
float temperature;
unsigned char seg_wen=25;//0-255
unsigned char sta_wen=25;
float seg_v=0;
bit mode;
void system_init(void)
{
   P0=0xff;
   P2=P2&0x1f|0x80;
   P2&=0x1f;

   P0=0x00;
   P2=P2&0x1f|0xa0;
   P2&=0x1f;
}
void key_proc()
{
   if(key_slow_down<10)return;
   key_slow_down=0;

   key_val= key_read();
   key_down=key_val&(key_old^key_val);
   key_old=key_val;

   switch(key_down)
   {
       case 4:
       if(++segmode==3)segmode=0;
       if(segmode==1)seg_wen=sta_wen;
       if(segmode==2)sta_wen=seg_wen;

   break;
       case 8:
       if(segmode==1)
       {
           if(--seg_wen==255)seg_wen=0;
       }

   break;
       case 9:
       if(segmode==1)
       {
           if(++seg_wen==100)seg_wen=99;

       }

   break;
       case 5:
           mode^=1;

   break;
   }
}
void working()
{
   if(mode==0)//模式1
   {
       if(temperature<sta_wen)seg_v=0;
       else seg_v=5;
   }
   else//模式2
   {
       if(temperature<20)seg_v=1;
       else if(temperature>40)seg_v=4;
       else
           seg_v=0.15*temperature-2;
   }
   DA_zhuanhua(seg_v*51);

   if(mode==0)ucled[0]=1;
   else ucled[0]=0;

   if(segmode==0)ucled[1]=1;
   else ucled[1]=0;

   if(segmode==1)ucled[2]=1;
   else ucled[2]=0;

   if(segmode==2)ucled[3]=1;
   else ucled[3]=0;

}

void seg_proc()
{
   if(seg_slow_down<500)return;
   seg_slow_down=0;

   temperature=rd_temperature();


   switch(segmode)
   {
       case 0:
           seg_buf[0]=11;
       seg_point[5]=1;

       seg_buf[4]=(unsigned char)temperature/10;
       seg_buf[5]=(unsigned char)temperature%10;
       seg_buf[6]=(unsigned int)(temperature*100)%100/10;
       seg_buf[7]=(unsigned int)(temperature*100)%10;


       break;
       case 1:
           seg_buf[0]=12;
       seg_point[5]=0;

       seg_buf[4]=10;
       seg_buf[5]=10;
       seg_buf[6]=seg_wen/10;
       seg_buf[7]=seg_wen%10;



       break;
       case 2:
           seg_buf[0]=13;
       seg_point[5]=1;
               seg_buf[4]=10;
       seg_buf[5]=(unsigned char)seg_v;
       seg_buf[6]=(unsigned int)(seg_v*100)%100/10;
       seg_buf[7]=(unsigned int)(seg_v*100)%10;


       break;

   }

}
void Timer0Init(void)       //1毫秒@12.000MHz
{
   AUXR &= 0x7F;       //定时器时钟12T模式
   TMOD &= 0xF0;       //设置定时器模式
   TL0 = 0x18;       //设置定时初值
   TH0 = 0xFC;       //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 ServiceT0() interrupt 1
{
   seg_slow_down++;
   key_slow_down++;
   if(++seg_pos==8)seg_pos=0;
   seg_disp(seg_pos,seg_buf[seg_pos],seg_point[seg_pos]);
   led_disp(seg_pos,ucled[seg_pos]);

}

void Delay750ms() //@12.000MHz
{
unsigned char i, j, k;

   _nop_();
   _nop_();
   i = 35;
   j = 51;
   k = 182;
   do
   {
       do
       {
           while (--k);
       } while (--j);
   } while (--i);
}

void main()
{
   Delay750ms();
   rd_temperature();
   Timer0Init();
   system_init();
while(1)
   {
       seg_proc();
       key_proc();
       working();

   }

}

seg.c

#include <seg.h>
unsigned char seg_wei[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};
unsigned char seg_duan[]={0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8, 0x80, 0x90 ,0xff,
0xc6,0x8c,0x88};
void seg_disp(unsigned char wei,duan,point)
{
   P0=0xff;
   P2=P2&0x1f|0xe0;
   P2&=0x1f;

   P0=seg_wei[wei];
   P2=P2&0X1f|0xc0;
   P2&=0x1f;

   P0=seg_duan[duan];
   if(point==1)P0&=0x7f;
   P2=P2&0X1f|0xe0;
   P2&=0x1f;
}

ds18b20.c

#include <ds18b20.h>

sbit DQ=P1^4;
void Delay_OneWire(unsigned int t)
{
   unsigned char i;
   while(t--){
       for(i=0;i<12;i++);
   }
}

//
void Write_DS18B20(unsigned char dat)
{
   unsigned char i;
   for(i=0;i<8;i++)
   {
       DQ = 0;
       DQ = dat&0x01;
       Delay_OneWire(5);
       DQ = 1;
       dat >>= 1;
   }
   Delay_OneWire(5);
}

//
unsigned char Read_DS18B20(void)
{
   unsigned char i;
   unsigned char dat;

   for(i=0;i<8;i++)
   {
       DQ = 0;
       dat >>= 1;
       DQ = 1;
       if(DQ)
       {
           dat |= 0x80;
       }
       Delay_OneWire(5);
   }
   return dat;
}

//
bit init_ds18b20(void)
{
   bit initflag = 0;

   DQ = 1;
   Delay_OneWire(12);
   DQ = 0;
   Delay_OneWire(80);
   DQ = 1;
   Delay_OneWire(10);
initflag = DQ;
   Delay_OneWire(5);

   return initflag;
}

float rd_temperature(void)
{
   unsigned char high;
   unsigned char low;
   init_ds18b20();
   Write_DS18B20(0xcc);
   Write_DS18B20(0x44);

   init_ds18b20();
   Write_DS18B20(0xcc);
   Write_DS18B20(0xbe);
   low=Read_DS18B20();
   high=Read_DS18B20();
   return ((high<<8)|low)/16.0;
}

key.c

#include <key.h>

unsigned char key_read(void)
{
   unsigned char temp=0;
   P44=0;P42=1;P35=1;P34=1;
   if(P30==0)temp=7;
   if(P31==0)temp=6;
   if(P32==0)temp=5;
   if(P33==0)temp=4;
P44=1;P42=0;P35=1;P34=1;
   if(P30==0)temp=11;
   if(P31==0)temp=10;
   if(P32==0)temp=9;
   if(P33==0)temp=8;
   P44=1;P42=1;P35=0;P34=1;
   if(P30==0)temp=15;
   if(P31==0)temp=14;
   if(P32==0)temp=13;
   if(P33==0)temp=12;
   P44=1;P42=1;P35=1;P34=0;
if(P30==0)temp=19;
   if(P31==0)temp=18;
   if(P32==0)temp=17;
   if(P33==0)temp=16;
   return temp;
}

pcf8591.c

#include <pcf8591.h>
#include <intrins.h>

#define DELAY_TIME 5
sbit scl=P2^0;
sbit sda=P2^1;

//
static void I2C_Delay(unsigned char n)
{
do
{
_nop_();_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();_nop_();
}
while(n--);
}

//
void I2CStart(void)
{
sda = 1;
scl = 1;
I2C_Delay(DELAY_TIME);
sda = 0;
I2C_Delay(DELAY_TIME);
scl = 0;
}

//
void I2CStop(void)
{
sda = 0;
scl = 1;
I2C_Delay(DELAY_TIME);
sda = 1;
I2C_Delay(DELAY_TIME);
}

//
void I2CSendByte(unsigned char byt)
{
unsigned char i;

for(i=0; i<8; i++){
scl = 0;
       I2C_Delay(DELAY_TIME);
if(byt & 0x80){
sda = 1;
}
else{
sda = 0;
}
       I2C_Delay(DELAY_TIME);
scl = 1;
byt <<= 1;
       I2C_Delay(DELAY_TIME);
}

scl = 0;
}

//
//unsigned char I2CReceiveByte(void)
//{
//   unsigned char da;
//   unsigned char i;
//   for(i=0;i<8;i++){
//       scl = 1;
//       I2C_Delay(DELAY_TIME);
//       da <<= 1;
//       if(sda)
//           da |= 0x01;
//       scl = 0;
//       I2C_Delay(DELAY_TIME);
//   }
//   return da;
//}

//
unsigned char I2CWaitAck(void)
{
   unsigned char ackbit;

scl = 1;
   I2C_Delay(DELAY_TIME);
ackbit = sda;
scl = 0;
   I2C_Delay(DELAY_TIME);

   return ackbit;
}

//
//void I2CSendAck(unsigned char ackbit)
//{
// scl = 0;
// sda = ackbit;
//   I2C_Delay(DELAY_TIME);
// scl = 1;
//   I2C_Delay(DELAY_TIME);
// scl = 0;
//   sda = 1;
//   I2C_Delay(DELAY_TIME);
//}

void DA_zhuanhua(unsigned char dat)
{
   I2CStart();
   I2CSendByte(0x90);
   I2CWaitAck();

   I2CSendByte(0x41);
   I2CWaitAck();

   I2CSendByte(dat);
   I2CWaitAck();
   I2CStop();
}

led.c

#include <led.h>

void led_disp(unsigned char pos,enable)
{
static unsigned char temp=0x00;
static unsigned char temp_old=0xff;
   if(enable==1)
   {
       temp |=(0x01<<pos);
   }
   else
   {
       temp &=~(0x01<<pos);
   }

   if(temp!=temp_old)
   {
       P0=~temp;
       P2=P2&0X1F|0X80;
       P2&=0X1F;
       temp_old=temp;
   }