第十三届蓝桥杯单片机省赛程序设计试题

目录

试题

各程序块代码

init.c

main.c

other.h

other.c

key.c

seg.c

onewire.c部分

ds1302.c部分

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试题

 

各程序块代码

init.c

#include "other.h"void init74hc138(unsigned char n){P2=(P2&0x1f)|(n<<5);P2&=0x1f;
}
void init(){P0=0x00;init74hc138(5);P0=0xff;init74hc138(4);
}

main.c

#include "other.h"
void Timer0_Init(void)		//1毫秒@12.000MHz
{AUXR |= 0x80;			//定时器时钟1T模式TMOD &= 0xF0;			//设置定时器模式TL0 = 0x20;				//设置定时初始值TH0 = 0xD1;				//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 Timer1_Init(void)		//1毫秒@12.000MHz
{AUXR |= 0x40;			//定时器时钟1T模式TMOD &= 0x0F;			//设置定时器模式TL1 = 0x20;				//设置定时初始值TH1 = 0xD1;				//设置定时初始值TF1 = 0;				//清除TF1标志TR1 = 1;				//定时器1开始计时ET1 = 1;				//使能定时器1中断EA=1;
}
void  main(){Timer0_Init();Timer1_Init();w_ds1302();temper=getT();while((int)temper==85)temper=getT();//解决初始温度数值为85°C的问题init();while(1){if(flag_seg){flag_seg=0;seg_ui(UI);//界面选择Seg_Loop();}//数码管动态显示if(flag_key){flag_key=0;Key_Loop();}//按键动态刷新if(flag_temper){flag_temper=0;temper=getT();}//获取温度值if(flag_time){flag_time=0;r_ds1302();}//获取时钟信息mod();    //温度/时间模式选择led();    //LED效果函数}
}
//定时器0用于基础模块
void Timer0_Isr(void) interrupt 1
{static unsigned char count1=0,count2=0;static unsigned int count3=0,count4=500;count1++;count2++;count3++;count4++;if(count1==2){count1=0;flag_seg=1;}if(count2==50){count2=0;flag_key=1;}if(count3==500){count3=0;flag_temper=1;}if(count4==1000){count4=500;flag_time=1;}
}
//定时器1用于LED效果和继电器吸合控制
void Timer1_Isr(void) interrupt 3
{static unsigned int count_relay=0,count_led1=0;static unsigned char count_led3=0;if(mod_relay_1){count_relay++;if(count_relay==5000){count_relay=0;no_relay();mod_relay_1=0;}}//时间控制模式下，继电器吸合5sif(led_time){count_led1++;if(count_led1==5000){count_led1=0;P0=0xff;init74hc138(4);}}//整点LED1闪烁5sif(led_relay){if(count_led3==0){P0=0xff;init74hc138(4);}else if(count_led3==100){P0=0xfb;init74hc138(4);P0=0xff;}else if(count_led3==200){count_led3=0;}count_led3++;}else{count_led3=0;}//继电器吸合时，LED3闪烁
}

other.h

#ifndef __OTHER_H__
#define __OTHER_H__#include <STC15F2K60S2.H>
#include "intrins.h"//onewire.c中的I/O口定义
sbit DQ=P1^4;
//ds1302.c中的I/O口定义
sbit SCK=P1^7;
sbit SDA=P2^3;
sbit RST=P1^3;//相关自定义变量
extern unsigned char keyval,keyold,keyup,keydown;//按键
extern unsigned char Seg_Buff[];//数码管缓存
extern unsigned char time[];//时钟数据
extern unsigned char UI;//界面控制字
extern float temper;//温度数据
extern unsigned char temper_max;//设定的温度参数
extern bit time_h_m_s;//时-分/分-秒标志位
extern bit mod_relay_1;//时间控制模式下的继电器吸合标志位
extern bit mod_relay_0;//温度控制模式下的继电器吸合标志位
extern bit led_time;//整点标志位
extern bit led_relay;//继电器吸合时，LED闪烁标志位
extern bit flag_mod;//控制模式转换标志位
extern bit flag_seg;//数码管扫描标志
extern bit flag_key;//按键扫描标志
extern bit flag_time;//时钟值获取标志
extern bit flag_temper;//温度值获取标志//init.c
void init74hc138(unsigned char n);
void init();//other.c
void relay();
void no_relay();
void mod();
void led();//onewire.c
float getT();//key.c
void Key_Loop();//ds1302.c
void w_ds1302();
void r_ds1302();//seg.c
void seg(unsigned char addr,num);
void Seg_Loop();
void seg_ui(unsigned char ui);#endif

other.c

#include "other.h"
unsigned char keyval,keyold,keyup,keydown;
unsigned char temper_max=23;
unsigned char UI=1;
float temper=0;
bit flag_mod=0;
bit time_h_m_s=0; 
bit mod_relay_1=0;
bit mod_relay_0=0;
bit led_time=0;
bit led_relay=0;
bit flag_seg=0;
bit flag_key=0;
bit flag_time=0;
bit flag_temper=0;void relay(){P0=0x10;init74hc138(5);P0=0xff;
}//继电器吸合
void no_relay(){P0=0x00;init74hc138(5);P0=0xff;
}//继电器松开//控制模式转换
void mod(){//时间控制模式if(flag_mod){no_relay();mod_relay_0=0;P0=0xff;init74hc138(4);if(time[0]==0&&time[1]==0){relay();//继电器吸合mod_relay_1=1;//由于需要持续5s//故继电器关闭写在主函数里}}//温度控制模式else{P0=0xfd;init74hc138(4);P0=0xff;if((int)(temper*10)>(temper_max*10)){relay();//继电器吸合mod_relay_0=1;}else{no_relay();//关闭继电器mod_relay_0=0;}}
}//LED效果
void led(){if(time[0]==0&&time[1]==0){P0=0xfe;init74hc138(4);P0=0xff;led_time=1;}if(mod_relay_0||mod_relay_1){if(!led_relay){P0=0xfb;init74hc138(4);P0=0xff;led_relay=1;}}else{P0=0xff;init74hc138(4);led_relay=0;}
}

key.c

#include "other.h"unsigned char Key_Scan(){unsigned char temp=0;P35=0;P34=1;if(P32==0){temp=13;return temp;}if(P33==0){temp=12;return temp;}P34=0;P35=1;if(P32==0){temp=17;return temp;}if(P33==0){temp=16;return temp;}return 0;
}
void Key_Loop(){keyval=Key_Scan();keydown=keyval&(keyold^keyval);keyup=~keyval&(keyold^keyval);if(keyval==12&&keyold!=12){UI++;if(UI==4)UI=1;}if(keyval==13&&keyold!=13){flag_mod=!flag_mod;}if(keyval==16&&keyold!=16&&UI==3){if(temper_max<99)temper_max++;}if(keyval==17&&keyold!=17&&UI==3){if(temper_max>10)temper_max--;}if(keyval==17&&UI==2){time_h_m_s=1;}else{time_h_m_s=0;}keyold=keyval;
}

seg.c

#include "other.h"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
0xbf, //-  10
0xc1, //U  11
0xff //熄灭 12
};
unsigned char Seg_Buff[]={11,12,12,12,12,12,12,12};void seg(unsigned char addr,num){P0=0xff;init74hc138(7);P0=0x01<<addr;init74hc138(6);P0=Seg_Table[num];if(UI==1&&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;
}void seg_u1(){Seg_Buff[7]=(int)((temper+0.05)*10)%10;Seg_Buff[6]=(int)((temper+0.05)*10)/10%10;if((int)temper>=10)Seg_Buff[5]=(int)((temper+0.05)*10)/100%10;elseSeg_Buff[5]=12;Seg_Buff[4]=12;Seg_Buff[3]=12;Seg_Buff[2]=12;Seg_Buff[1]=1;
}void seg_u2(){if(time_h_m_s){//分_秒Seg_Buff[7]=time[0]%10;Seg_Buff[6]=time[0]/10;Seg_Buff[4]=time[1]%10;Seg_Buff[3]=time[1]/10;}else{//时_分Seg_Buff[7]=time[1]%10;Seg_Buff[6]=time[1]/10;Seg_Buff[4]=time[2]%10;Seg_Buff[3]=time[2]/10;}Seg_Buff[5]=10;Seg_Buff[2]=12;Seg_Buff[1]=2;
}void seg_u3(){Seg_Buff[7]=temper_max%10;Seg_Buff[6]=temper_max/10;Seg_Buff[5]=12;Seg_Buff[4]=12;Seg_Buff[3]=12;Seg_Buff[2]=12;Seg_Buff[1]=3;
}//界面选择
void seg_ui(unsigned char ui){switch(ui){case 1:seg_u1();break;case 2:seg_u2();break;case 3:seg_u3();break;}
}

onewire.c部分

#include "other.h"float getT(){unsigned int tH,tL;float temp;EA=0;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;EA=1;return temp;
}

ds1302.c部分

#include "other.h"
unsigned char time[]={0,25,23};void Write_Ds1302_Byte( unsigned char address,unsigned char dat )     
{//......................Write_Ds1302(dat/10*16|dat%10);		//十进制数——>BCD码RST=0; 
}
unsigned char Read_Ds1302_Byte ( unsigned char address )
{unsigned char i,temp=0x00;unsigned char dat1,dat2;//......................dat1=temp/16*10;dat2=temp%16;temp=dat1+dat2;    //BCD码——>十进制数return (temp);		
}void w_ds1302(){unsigned char i,addr=0x80;Write_Ds1302_Byte(0x8e,0x00);for(i=0;i<3;i++){Write_Ds1302_Byte(addr,time[i]);addr+=2;}Write_Ds1302_Byte(0x8e,0x80);
}
void r_ds1302(){unsigned char i,addr=0x81;for(i=0;i<3;i++){time[i]=Read_Ds1302_Byte(addr);addr+=2;}
}