第16届蓝桥杯单片机模拟试题Ⅰ

试题

代码

 sys.h

#ifndef __SYS_H__
#define __SYS_H__#include <STC15F2K60S2.H>
//onewire.c
float getT();
//sys.c
extern unsigned char UI;
extern bit touch_mode;
extern float jiaozhun;
extern float canshu;
extern float temper;
void init74hc138(unsigned char n);
void init();
void get_temper();
void led_ui_touch_c();
//seg_key.c
extern unsigned char Seg_Buff[8];
void Seg_Loop();
void Key_Loop();
void seg_ui();
#endif

main.c

 

#include "sys.h"
bit flag_seg=0;
bit flag_key=0;
bit flag_temper=0;
void Timer0_Init(void)		//100微秒@12.000MHz
{AUXR |= 0x80;			//定时器时钟1T模式TMOD &= 0xF0;			//设置定时器模式TL0 = 0x50;				//设置定时初始值TH0 = 0xFB;				//设置定时初始值TF0 = 0;				//清除TF0标志TR0 = 1;				//定时器0开始计时ET0 = 1;				//使能定时器0中断EA = 1;
}
void main(){init();Timer0_Init();while(getT()==85.0);while(1){led_ui_touch_c();if(flag_seg){flag_seg=0;Seg_Loop();}if(flag_key){flag_key=0;Key_Loop();seg_ui();}if(flag_temper){flag_temper=0;get_temper();seg_ui();}}
}
void Timer0_Isr(void) interrupt 1
{static unsigned char count1=0;static unsigned char count2=0;static unsigned int count3=0;count1++;count2++;count3++;if(count1==2){count1=0;flag_seg=1;}if(count2==50){count2=0;flag_key=1;}if(count3==1000){count3=0;flag_temper=1;}
}

sys.c

#include "sys.h"
unsigned char UI=0;//0为温度界面，1为校准值界面，2为参数界面
bit touch_mode=0;//0为上触发模式，1为下触发模式
float jiaozhun=0.0;//校准值
float canshu=26.0;//参数
float temper;
void init74hc138(unsigned char n){P2=(P2&0x1f)|(n<<5);P2&=0x1f;
}
void init(){P0=0x00;init74hc138(5);P0=0xff;init74hc138(4);
}
void get_temper(){temper=getT()+jiaozhun;
}
void led(unsigned char addr){P0=~(0x01<<(addr-1));init74hc138(4);
}
void led_ui_touch_c(){switch(UI){case 0:led(1);break;case 1:led(2);break;case 2:led(3);break;}if(!touch_mode){led(4);if(temper>canshu) led(8);}else{led(5);if(temper<canshu) led(8);}
}

seg_key.c

#include "sys.h"
sbit COL1=P4^4;
sbit COL2=P4^2;
sbit ROW3=P3^2;
sbit ROW4=P3^3;
code unsigned char Seg_Table[] = 
{
0xc0, //0
0xf9, //1
0xa4, //2
0xb0, //3
0x99, //4
0x92, //5
0x82, //6
0xf8, //7
0x80, //8
0x90, //9
0xc6, //C 10
0x86, //E 11
0x89, //H 12
0xbf, //- 13
0xff  //熄灭 14
};
unsigned char Seg_Buff[8]={14,14,14,14,14,14,14,14};
unsigned char keyval,keyold,keyup,keydown;
void seg(unsigned char addr,unsigned char num){P0=0xff;init74hc138(7);P0=0x01<<addr;init74hc138(6);P0=Seg_Table[num];if(UI==0&&addr==6) P0&=0x7f;init74hc138(7);
}
void Seg_Loop(){static unsigned char i=0;seg(i,Seg_Buff[i]);i++;if(i==8) i=0;
}
unsigned char key_scan(){COL1=0;COL2=1;if(ROW4==0) return 4;if(ROW3==0) return 5;COL1=1;COL2=0;if(ROW4==0) return 8;if(ROW3==0) return 9;return 0;
}
void Key_Loop(){keyval=key_scan();keydown=keyval&(keyold^keyval);keyup=~keyval&(keyold^keyval);//s4负责切换界面if(keyval==4&&keyold!=4){UI++;if(UI==3) UI=0;}//s5负责切换触发模式if(keyval==5&&keyold!=5){touch_mode=~touch_mode;}//s8负责减if(keyval==8&&keyold!=8){if(UI==1){if(jiaozhun>-99) jiaozhun--;}if(UI==2){if(canshu>-99) canshu--;}}//s9负责加if(keyval==9&&keyold!=9){if(UI==1){if(jiaozhun<99) jiaozhun++;}if(UI==2){if(canshu<99) canshu++;}}keyold=keyval;keyval=0;
}
void ui0(){//温度界面Seg_Buff[7]=(unsigned char)((temper+0.05)*10)%10;Seg_Buff[6]=(unsigned char)(temper+0.05)%10;Seg_Buff[5]=(unsigned char)temper/10;Seg_Buff[4]=14;Seg_Buff[3]=14;Seg_Buff[2]=14;Seg_Buff[1]=14;Seg_Buff[0]=10; //C
}
void ui1(){//校准值界面float temp=jiaozhun;if(jiaozhun<0) temp=-jiaozhun;Seg_Buff[7]=(unsigned char)temp%10;if((unsigned char)temp>=10){Seg_Buff[6]=(unsigned char)temp/10;Seg_Buff[5]=14;if(jiaozhun<0)Seg_Buff[5]=13;}else{Seg_Buff[6]=14;Seg_Buff[5]=14;if(jiaozhun<0)Seg_Buff[6]=13;}Seg_Buff[4]=14;Seg_Buff[3]=14;Seg_Buff[2]=14;Seg_Buff[1]=14;Seg_Buff[0]=11; //E
}
void ui2(){//参数界面float temp=canshu;if(canshu<0) temp=-canshu;Seg_Buff[7]=(unsigned char)temp%10;if((unsigned char)temp>=10){Seg_Buff[6]=(unsigned char)temp/10;Seg_Buff[5]=14;if(canshu<0)Seg_Buff[5]=13;}else{Seg_Buff[6]=14;Seg_Buff[5]=14;if(canshu<0)Seg_Buff[6]=13;}Seg_Buff[4]=14;Seg_Buff[3]=14;Seg_Buff[2]=14;Seg_Buff[1]=14;Seg_Buff[0]=12; //H
}
void seg_ui(){switch(UI){case 0:ui0();break;case 1:ui1();break;case 2:ui2();break;}
}

onewire.c

#include "sys.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 getT(){unsigned char tH,tL;float temp;init_ds18b20();Write_DS18B20(0xcc);Write_DS18B20(0x44);init_ds18b20();Write_DS18B20(0xcc);Write_DS18B20(0xbe);tL=Read_DS18B20();tH=Read_DS18B20();temp=(float)(tH<<8|tL)*0.0625;return temp;
}