十二届蓝桥杯单片机真题的代码

#include <STC15F2K60S2.H> #include "intrins.H" #include "main.h" #include "onewire.h" #include "iic.h" unsigned char tab[]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90,0XBF,0XFF,0xc6,0x8c,0x88};//0~9,关闭,C,P A unsigned char yi,er,san,si,wu,liu,qi,ba; unsigned char jie=1; unsigned int wendu=1900; unsigned char k=0; unsigned char wendu_self=25;//温度参数 unsigned char moshi=1; unsigned char LED_selg=0xff; unsigned d; float DAC; void moshi_x(); void key(); void display(); void jiemian(); void Timer0_Init(void); void LED_dis(); void Delay100us() //@11.0592MHz { unsigned char i; _nop_(); i = 23; while (--i); } void Delayms(unsigned char k) //@11.0592MHz { unsigned char i, j; while(k--) { _nop_(); _nop_(); _nop_(); i = 11; j = 190; do { while (--j); } while (--i); } } void main() { P0=0x00; Y5C;Y0C; P0=0xff; Y4C; Y0C; yi=er=wu=san=si=wu=liu=qi=ba=11; Timer0_Init(); wendu=read_temp(); while(1) { jiemian(); key(); moshi_x(); LED_dis(); } } void LED_dis() { P0=LED_selg; Y4C; if(moshi==1) { LED_selg&=0xfe; } else LED_selg|=~0xfe; if(jie==1) { LED_selg&=0xfd; } else LED_selg|=~0xfd; if(jie==2) { LED_selg&=0xfb; } else LED_selg|=~0xfb; if(jie==3) { LED_selg&=0xf7; } else LED_selg|=~0xf7; Y0C; } void moshi_x() { float t; unsigned char a; if(k>=250) { wendu=read_temp(); k=0; } t=(float)wendu/100; if(moshi==1) { if(t<wendu_self) DAC=0; else DAC=5; }else if(moshi==2) { if(t<=20) DAC=1; else if(t>=40) DAC=4; else DAC=1+(t-20)*0.15; } a=DAC*51; d=DAC*100; write_DAC(a); jiemian(); } void time1() interrupt 1 { k++; } void Timer0_Init(void) //1毫秒@11.0592MHz { AUXR |= 0x80; //定时器时钟1T模式 TMOD &= 0xF0; //设置定时器模式 TL0 = 0xCD; //设置定时初始值 TH0 = 0xD4; //设置定时初始值 TF0 = 0; //清除TF0标志 TR0 = 1; //定时器0开始计时 EA=1; ET0=1; } void jiemian() { if(jie==1) { if(k>=250) { wendu=read_temp(); k=0; } yi=12; wu=wendu/1000; liu=(wendu/100)%10; qi=(wendu/10)%10; ba=wendu%10; }else if(jie==2) { yi=13; wu=11; liu=11; qi=wendu_self/10;//十位 ba=wendu_self%10; }else if(jie==3) { yi=14; wu=11; liu=d/100; qi=(d/10)%10; ba=d%10; } display(); } void display() { P0=0x01;Y6C;Y0C; P0=tab[yi];Y7C;Delay100us();P0=0xff;Y0C; P0=0x02;Y6C;Y0C; P0=tab[er];Y7C;Delay100us();P0=0xff;Y0C; P0=0x04;Y6C;Y0C; P0=tab[san];Y7C;Delay100us();P0=0xff;Y0C; P0=0x08;Y6C;Y0C; P0=tab[si];Y7C;Delay100us();P0=0xff;Y0C; P0=0x10;Y6C;Y0C; P0=tab[wu];Y7C;Delay100us();P0=0xff;Y0C; P0=0x20;Y6C;Y0C; if(jie==1||jie==3) P0=tab[liu]&0x7f; else P0=tab[liu];Y7C;Delay100us();P0=0xff;Y0C; P0=0x40;Y6C;Y0C; P0=tab[qi];Y7C;Delay100us();P0=0xff;Y0C; P0=0x80;Y6C;Y0C; P0=tab[ba];Y7C;Delay100us();P0=0xff;Y0C; } void key() { P3=0xff; P44=1; P42=1; P44=0; if(P32==0||P33==0) { Delayms(7); if(P32==0)//S5 { if(moshi==1) moshi=2;else if(moshi==2) moshi=1; } if(P33==0)//S4 { if(jie==1) jie=2; else if(jie==2) jie=3; else if(jie==3) jie=1; } }while(P32==0||P33==0) display(); P3=0xff; P44=1; P42=1; P42=0; if(P32==0||P33==0) { Delayms(7); if(P32==0)//S9 { if(jie==2) wendu_self+=1; } if(P33==0)//S8 { if(jie==2) wendu_self-=1; } }while(P32==0||P33==0) display(); }