蓝桥杯单片机第十二届国赛题

#include <STC15F2K60S2.H> #include "inithc138.h" #include "delay.h" #include "ds1302.h" #include "intrins.h" #include "iic.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 }; unsigned char ds1302readaddr[3] = {0x81,0x83,0x85}; unsigned char ds1302writeaddr[3] = {0x80,0x82,0x84}; unsigned char time[3] = {0x01,0x20,0x20}; unsigned char mode1 = 0; unsigned char mode2 = 0; bit moshi = 0;//模式标识符 unsigned char jilu = 0;//记录模式选择 unsigned int ustime = 0;//超声波时间 unsigned int distance = 0;//超声波距离 unsigned int dismax = 0;//最大距离 unsigned long disall = 0;//距离总和 unsigned long disavr = 0;//平均距离 unsigned int dismin = 0;//最小距离 unsigned char trigger = 0;//采集次数 unsigned char caijishijian = 2;//采集时间 unsigned char julicanshu = 20;//距离参数 bit show = 0;//显示模式选择 unsigned char voltage = 0;//光敏电阻电压数据 bit light = 0;//亮暗状态 unsigned char secondtmp = 0; unsigned char ledstat = 0xff;//LED状态 unsigned char dacload = 0;//DAC输出量 bit flag = 0;//保证每次进入测距状态只测一次 unsigned char canshufujin = 0;//记录距离在定时模式下位于参数附近的次数 //***********************************DS1302 void ds1302config(){ unsigned char i; Write_Ds1302_Byte(0x8e,0x00); for(i = 0;i < 3;i++){ Write_Ds1302_Byte(ds1302writeaddr[i],time[i]); } Write_Ds1302_Byte(0x8e,0x80); } void ds1302read(){ unsigned char i; for(i = 0;i < 3;i++){ time[i] = Read_Ds1302_Byte(ds1302readaddr[i]); } secondtmp = (time[0] / 16 * 10) + (time[0] % 16); } //*********************************** //***********************************超声波 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 ceju(){ flag = 1;//测了 CMOD = 0x00; //设置定时器模式 CL = 0x00; //设置定时初始值 CH = 0x00; //设置定时初始值 CF = 0; //清除TF0标志 CR = 0; fangbo(); CR = 1; while((RX == 1) && (CH < 0x17)); CR = 0; if(RX == 0){ RX = 1; ustime = (CH << 8) | CL; distance = ustime * 0.017; } } //*********************************** //***********************************数据显示界面 void shijianshuju(){//时间数据显示界面 showsmg(1,Seg_Table[time[2] / 16]); showsmg(2,Seg_Table[time[2] % 16]); showsmg(3,Seg_Table[16]); showsmg(4,Seg_Table[time[1] / 16]); showsmg(5,Seg_Table[time[1] % 16]); showsmg(6,Seg_Table[16]); showsmg(7,Seg_Table[time[0] / 16]); showsmg(8,Seg_Table[time[0] % 16]); } void julishuju(){//距离记录 showsmg(1,0xc7); if(moshi == 0){ showsmg(2,Seg_Table[12]);//触发模式 }else{ showsmg(2,Seg_Table[15]);//定时模式 } showsmg(8,Seg_Table[distance % 10]); if(distance > 9){ showsmg(7,Seg_Table[distance / 10 % 10]); } if(distance > 99){ showsmg(6,Seg_Table[distance / 100]); } } void shujujilu(){ if(jilu == 0){ showsmg(1,0x89); showsmg(2,0xfe); showsmg(7,Seg_Table[dismax / 10]); showsmg(8,Seg_Table[dismax % 10]); } if(jilu == 1){ showsmg(1,0x89); showsmg(2,0xbf); showsmg(6,Seg_Table[disavr / 100]); showsmg(7,Seg_Table[disavr / 10 % 10] & 0x7f); showsmg(8,Seg_Table[disavr % 10]); } if(jilu == 2){ showsmg(1,0x89); showsmg(2,0xf7); showsmg(7,Seg_Table[dismin / 10]); showsmg(8,Seg_Table[dismin % 10]); } } void xianshi(){ switch(mode1){ case 0:shijianshuju();break; case 1:julishuju();break; case 2:shujujilu();break; } } //*********************************** //***********************************参数设置界面 void caijishijianshezhi(){//采集时间设置界面 showsmg(1,0x8c); showsmg(2,Seg_Table[1]); showsmg(7,Seg_Table[caijishijian / 10]); showsmg(8,Seg_Table[caijishijian % 10]); } void julicanshushezhi(){//距离参数设置界面 showsmg(1,0x8c); showsmg(2,Seg_Table[2]); showsmg(7,Seg_Table[julicanshu / 10]); showsmg(8,Seg_Table[julicanshu % 10]); } void canshujiemian(){ switch(mode2){ case 0:caijishijianshezhi();break; case 1:julicanshushezhi();break; } } //*********************************** //*********************************** void showselect(){ if(show == 0){ xianshi();//数据显示界面 }else{ canshujiemian();//参数设置界面 } } //*********************************** //***********************************按键扫描 void scankey(){ P33 = 0;P32 = 1;P44 = 1;P35 = 1; if(P44 == 0){Delay(de);while(P44 == 0){showselect();}//S4 show = ~show; mode1 = 0;mode2 = 0;jilu = 0; } if((show == 0) && (mode1 == 1)){//S13在测距数据显示界面下 if(P35 == 0){Delay(de);while(P35 == 0){showselect();} moshi = ~moshi; } } if((show == 0) && (mode1 == 2)){//S13在数据记录显示界面下 if(P35 == 0){Delay(de);while(P35 == 0){showselect();} jilu++; jilu %= 3; } } P33 = 1;P32 = 0;P44 = 1;P35 = 1; if(show == 0){//S5在数据显示界面下 if(P44 == 0){Delay(de);while(P44 == 0){showselect();} mode1++; mode1 %= 3; } } if(show == 1){//S5在参数设置界面下 if(P44 == 0){Delay(de);while(P44 == 0){showselect();} mode2++; mode2 %= 2; } } if(P35 == 0){Delay(de);while(P35 == 0){showselect();}//S4} if(show == 1){//S13为参数调整按键 if(mode2 == 0){//调整采集时间参数 caijishijian++; if(caijishijian > 9){caijishijian = 2;} } if(mode2 == 1){//调整距离参数 julicanshu += 10; if(julicanshu > 80){julicanshu = 10;} } } } } //*********************************** //***********************************测距模式 void jilumoshi(){//记录数据判断 if(trigger == 1){//最小值的初始化 dismin = distance; } if(dismax < distance){//记录最大值 dismax = distance; } if(dismin > distance){ dismin = distance; } disall = disall + distance; if(trigger > 0){ disavr = disall * 10 / trigger; } if(moshi == 1){ if((distance >= (julicanshu - 5)) && (distance <= julicanshu + 5)){ canshufujin++; }else{ canshufujin = 0; } }else{ canshufujin = 0; } } void lianganpanduan(){ voltage = guangmin(); Delay(1); if(voltage < 20){ light = 1;//暗下来 }else{ light = 0;//亮 } } void dingshimoshi(){//定时模式 if(secondtmp % caijishijian == 0){ if(flag == 0){ ceju(); trigger++; jilumoshi(); } }else{ flag = 0; } } void chufamoshi(){//触发模式 if(light == 1){ if(flag == 0){ ceju(); trigger++; jilumoshi(); } }else{ flag = 0; } } void cejumoshi(){ if(moshi == 0){ chufamoshi(); } if(moshi == 1){ dingshimoshi(); } } //*********************************** //***********************************LED void led(){ if((show == 0) && (mode1 == 0)){ ledstat = ledstat & ~0x01; }else{ ledstat = ledstat | 0x01; } if((show == 0) && (mode1 == 1)){ ledstat = ledstat & ~0x02; }else{ ledstat = ledstat | 0x02; } if((show == 0) && (mode1 == 2)){ ledstat = ledstat & ~0x04; }else{ ledstat = ledstat | 0x04; } if(moshi == 0){//触发模式 ledstat = ledstat & ~0x08; }else{ ledstat = ledstat | 0x08; } if(canshufujin >= 3){//定时模式下附近次数超过三次 ledstat = ledstat & ~0x10; }else{ ledstat = ledstat | 0x10; } if(light){ ledstat = ledstat | 0x20; }else{ ledstat = ledstat & ~0x20; } outputp0(4,ledstat); } //*********************************** //*********************************** void DACshuchu(){ if(distance <= 10){ dacload = 51; }else if(distance >= 80){ dacload = 255; }else{ dacload = 2.91 * distance + 21.86; } DAC(dacload); Delay(1); } //*********************************** //*********************************** void main(){ initsys(); ds1302config