蓝桥杯单片机第十届国赛程序设计题

#include <STC15F2K60S2.H> #include "intrins.h" #include "delay.h" #include "inithc138.h" #include "onewire.h" #include "iic.h" #include "stdio.h" #include "string.h" #define de 5 code unsigned char Seg_Table[17] = { 0xc0, //0 0xf9, //1 0xa4, //2 0xb0, //3 0x99, //4 0x92, //5 0x82, //6 0xf8, //7 0x80, //8 0x90, //9 0x88, //A 0x83, //b 0xc6, //C 0xa1, //d 0x86, //E 0x8e, //F 0xbf }; bit show = 0;//显示功能切换 unsigned char shuju = 0;//数据界面显示切换 bit canshu = 0;//参数界面切换 bit ce = 1; unsigned int temp = 0;//温度 unsigned int time = 0;//超声波传播时间 unsigned int distance = 0;//测距距离 unsigned int cishu = 0;//参数变更次数 char tempcan = 30;//温度参数 char tempcancertain = 30;//温度参数确定值 char discan = 35;//距离参数 char discancertain = 35;//距离参数确定值 bit keystat = 0; unsigned char keycount = 0;//长按计时 bit DACoutput = 1;//DAC输出功能模式 unsigned char zifushu = 0;//命令字符数 unsigned char command[10] = {0};//命令 unsigned char ledstat = 0xff;//LED状态 bit disflag = 0; //***************************************测温模块 void cewen(){ unsigned char MSB,LSB; init_ds18b20(); Write_DS18B20(0xcc); Write_DS18B20(0x44); if(ce){ ce = 0; Delay(550); } init_ds18b20(); Write_DS18B20(0xcc); Write_DS18B20(0xbe); LSB = Read_DS18B20(); MSB = Read_DS18B20(); init_ds18b20(); temp = ((MSB << 8) | LSB) * 6.25; } //*************************************** //***************************************测距模块 sbit TX = P1^0; sbit RX = P1^1; void Delay12us(void) //@12.000MHz { unsigned char data i; _nop_(); _nop_(); i = 33; while (--i); } void fangbo(){ unsigned char i; for(i = 0;i < 8;i++){ TX = 1; Delay12us(); TX = 0; Delay12us(); } } void initpca(){ CMOD = 0x01; CCON = 0X00; } void ceju(){ CH = 0x00; CL = 0x00; CF = 0; CR = 0; fangbo(); CR = 1; while((RX == 1) && (CH < 0x17)); CR = 0; if(RX == 0){ RX = 1; disflag = 1; time = (CH << 8) | CL; distance = time * 0.017; }else{ disflag = 0; } } //*************************************** //***************************************显示功能 void wendushuju(){//温度数据显示 showsmg(1,Seg_Table[12]); showsmg(5,Seg_Table[temp / 1000]); showsmg(6,Seg_Table[temp / 100 % 10] & 0x7f); showsmg(7,Seg_Table[temp / 10 % 10]); showsmg(8,Seg_Table[temp % 10]); } void julishuju(){//距离数据 showsmg(1,0xc7); showsmg(7,Seg_Table[distance / 10]); showsmg(8,Seg_Table[distance % 10]); } void cishubiangeng(){//次数变更 showsmg(1,0xc8); showsmg(8,Seg_Table[cishu % 10]); if(cishu > 9){ showsmg(7,Seg_Table[cishu / 10 % 10]); } if(cishu > 99){ showsmg(6,Seg_Table[cishu / 100 % 10]); } if(cishu > 999){ showsmg(5,Seg_Table[cishu / 1000 % 10]); } if(cishu > 9999){ showsmg(4,Seg_Table[cishu / 10000 % 10]); } } void shujujiemian(){//数据界面模式选择 switch(shuju){ case 0:wendushuju();break; case 1:julishuju();break; case 2:cishubiangeng();break; } } void wenducanshu(){//温度参数 showsmg(1,0x8c); if(canshu == 0){ showsmg(4,Seg_Table[1]); showsmg(7,Seg_Table[tempcan / 10]); showsmg(8,Seg_Table[tempcan % 10]); }else{ showsmg(4,Seg_Table[2]); showsmg(7,Seg_Table[discan / 10]); showsmg(8,Seg_Table[discan % 10]); } } //*************************************** void showselect(){ if(show == 0){ shujujiemian(); }else{ wenducanshu(); } } //*************************************** //***************************************长短按检测 void Timer0_Isr(void) interrupt 1 { if(keystat){ keycount++; } } void Timer0_Init(void) //50毫秒@12.000MHz { AUXR &= 0x7F; //定时器时钟12T模式 TMOD &= 0xF0; //设置定时器模式 TL0 = 0xB0; //设置定时初始值 TH0 = 0x3C; //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; } //*************************************** //***************************************按键扫描 void shujugaibian(){//判断数据是否发生改变 if((discancertain != discan) || (tempcancertain != tempcan)){ cishu++; discancertain = discan; tempcancertain = tempcan; eepromwrite(cishu); Delay(1); }else{ discan = discancertain; tempcan = tempcancertain; } } void scankey(){ P33 = 0;P32 = 1;P35 = 1;P34 = 1; if(P35 == 0){Delay(de);while(P35 == 0){//S12 keystat = 1; showselect(); } keystat = 0; if(keycount < 20){//短按 if(show == 0){ shuju++; shuju %= 3; } if(show == 1){ canshu = ~canshu; } }else if(keycount >= 20){//长按 cishu = 0; eepromwrite(cishu); Delay(1); } keycount = 0; } if(P34 == 0){Delay(de);while(P34 == 0){//S16 showselect(); } if((show == 1) && (canshu == 0)){//温度参数界面 tempcan -= 2; if(tempcan < 0){tempcan = 0;} } if((show == 1) && (canshu == 1)){ discan -= 5; if(discan < 0){discan = 0;} } } P33 = 1;P32 = 0;P35 = 1;P34 = 1; if(P35 == 0){Delay(de);while(P35 == 0){//S13 keystat = 1; showselect(); } keystat = 0; if(keycount < 20){//短按 if(show == 1){ shujugaibian();//判断数据是否发生改变 } show = ~show;canshu = 0;shuju = 0; }else if(keycount >= 20){//长按 DACoutput = ~DACoutput; } keycount = 0; } if(P34 == 0){Delay(de);while(P34 == 0){//S17 showselect(); } if((show == 1) && (canshu == 0)){//温度参数界面 tempcan += 2; if(tempcan > 99){tempcan = 99;} } if((show == 1) && (canshu == 1)){ discan += 5; if(discan > 99){discan = 99;} } } } //***************************************串口通讯 void Uart1_Isr(void) interrupt 4 { if (RI) //检测串口1接收中断 { command[zifushu] = SBUF; zifushu++; RI = 0; //清除串口1接收中断请求位 } } void Uart1_Init(void) //4800bps@12.000MHz { SCON = 0x50; //8位数据,可变波特率 AUXR |= 0x01; //串口1选择定时器2为波特率发生器 AUXR |= 0x04; //定时器时钟1T模式 T2L = 0x8F; //设置定时初始值 T2H = 0xFD; //设置定时初始值 AUXR |= 0x10; //定时器2开始计时 ES = 1; //使能串口1中断 } void sendbyte(unsigned char dat){//串口发送单字节 SBUF = dat; while(TI == 0); TI = 0; } void minglingshibie(){//命令识别 unsigned char i; if(command[zifushu - 1] == '\n'){ if((command[0] == 'S') && (command[1] == 'T') && (command[2] == '\r') && (command[3] == '\n')){ printf("$%d,%d.%d",(int)(distance),(int)(temp / 100),(int)(temp % 100)); }else if((command[0] == 'P') && (command[1] == 'A') && (command[2] == 'R') && (command[3] == 'A')){ printf("#%d,%d\r\n",(int)(tempcancertain),(int)(discancertain)); }else{ printf("ERROR\r\n"); } zifushu = 0; for(i = 0;i < 10;i++){ command[i] = 0; } } } char putchar(char ch){//重定向 sendbyte(ch); return ch; } //*************************************** //***************************************DAC输出模块与LED灯 void DACshuchu(){ if(DACoutput){ if(distance <= discancertain){ DAC(102); }else if(distance > discancertain){ DAC(204); } }else{ DAC(21); } } void led(){ if(temp > (tempcancertain * 100)){ ledstat = ledstat & ~0x01; }else{ ledstat = ledstat | 0x01; } if((distance < discancertain) && (disflag)){ ledstat = ledstat & ~0x02; }else{ ledstat = ledstat | 0x02; } if(DACoutput){ ledstat = ledstat & ~0x04; }else{ ledstat = ledstat | 0x04; } outputp0(4,ledstat); } //*************************************** //*************************************** void main(){ initsys(); initpca(); cewen(); Uart1_Init(); Timer0_Init(); cishu = eepromread(); while(1){ ceju(); showselect(); cewen(); showselect(); scankey(); showselect(); minglingshibie(); DACshuchu(); led(); } }