蓝桥杯单片机第七届

Posted 2022-12-06 一心向月

全部文件：提取码：azxy
直接看题目吧，这一届主要的考点应该是用定时器控制PWM输出。

#include "STC15F2K60S2.h"
#include "intrins.h"
#include "onewire.h"
typedef unsigned char u8;
typedef unsigned int u16;
sbit S4=P3^3;
sbit S5=P3^2;
sbit S6=P3^1;
sbit S7=P3^0;
//					0	 1	  2	   3    4    5    6    7    8    9  ??  —	//
u8 code duan[12]=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff,0xbf;
u8 model=1;
u8 work_time=0;
u8 temp=0;
u8 temp_flag=0;
u8 count=0;
u16 count1=0;
u8 pwm=0;

void delay(u16 i)

	while(i--);


void Timer0Init(void)		//100us 12.000MHz

	AUXR |= 0x80;		
	TMOD &= 0xF0;		
	TL0 = 0x50;		
	TH0 = 0xFB;		
	TF0 = 0;		
	ET0 = 1;	
	EA = 1;


void Service_T0() interrupt 1

	count++;
	count1++;
	if(count==pwm)
	
		P34=0;
	
	else if(count==10)
	
		P34=1;
		count=0;
	
	if(count1==10000)
	
		work_time--;
		count1=0;
	


void Chan_hc573(chose)

	switch(chose)
	
		case 4:
			P2 = (P2 & 0x1f) | 0x80; break;
		case 5:
			P2 = (P2 & 0x1f) | 0xa0; break;
		case 6:
			P2 = (P2 & 0x1f) | 0xc0; break;
		case 7:
			P2 = (P2 & 0x1f) | 0xe0; break;
	


void Init_system()

	Chan_hc573(5);
	P0=0x00;
	Chan_hc573(4);
	P0=0xff;


void Smg_display(u8 com,u8 dat)

	Chan_hc573(7);
	P0=0xff;
	Chan_hc573(6);
	P0=0x01<<com;
	Chan_hc573(7);
	P0=dat;


void Close_smg()

	Chan_hc573(6);
	P0=0x00;
	Chan_hc573(7);
	P0=0xff;


void Model_display()

	if(temp_flag==0)
	
		Smg_display(0,duan[11]); delay(1000);
		Smg_display(1,duan[model]); delay(1000);
		Smg_display(2,duan[11]); delay(1000);
		Smg_display(3,duan[10]); delay(1000);
		Smg_display(4,duan[work_time/1000]); delay(1000);
		Smg_display(5,duan[(work_time/100)%10]); delay(1000);
		Smg_display(6,duan[(work_time/10)%10]); delay(1000);
		Smg_display(7,duan[work_time%10]); delay(1000);
		Close_smg();
	
	else if(temp_flag==1)
	
		Smg_display(0,duan[11]); delay(1000);
		Smg_display(1,duan[4]); delay(1000);
		Smg_display(2,duan[11]); delay(1000);
		Smg_display(3,duan[10]); delay(1000);
		Smg_display(4,duan[10]); delay(1000);
		Smg_display(5,duan[temp/10]); delay(1000);
		Smg_display(6,duan[temp%10]); delay(1000);
		Smg_display(7,0xc6); delay(1000);
		Close_smg();
	
	

void Key_down()

	if(S4==0)
	
		delay(100);
		if(S4==0)
		
			while(S4==0) Model_display();
			model++; work_time=0; TR0=0; count1=0;
			if(model==4) model=1;
		
	
	if(S5==0)
	
		delay(100);
		if(S5==0)
		
			while(S5==0) Model_display();
			if(work_time==0) work_time=60;TR0=1;
			else if(work_time<=60) work_time=120;
			else if(work_time<=120) work_time=0;TR0=0;
		
	
	if(S6==0)
	
		delay(100);
		if(S6==0)
		
			while(S6==0) Model_display();
			work_time=0;TR0=0;
		
	
	if(S7==0)
	
		delay(100);
		if(S7==0)
		
			while(S7==0) Model_display();
			if(temp_flag==0) temp_flag=1;
			else if(temp_flag==1) temp_flag=0;
		
	


void Rank()

	Chan_hc573(4);
	if(work_time!=0)
	
		if(model==1) pwm=2; P00=0;
		else if(model==2) pwm=3; P01=0;
		else if(model==3) pwm=7; P02=0;
	
	else P34=0;


void main()

	Init_system();
	Timer0Init();
	while(1)
	
		Rank();
		Key_down();
		Model_display();
		temp=DS18B20_Read();