蓝桥杯单片机12届第二场

这是第三次写了，都挺顺畅的，就是长按键那里卡了一下，就是发现还可以把按键写在定时器里，这样就方便多了，我之前写的长按键确实麻烦了些。

 

 

 

 

 

 

 

main.c

#include "sys.h"
#include "iic.h"

uint volt1,volt3;
//void Led();
void main()
{
	InitSystem();
	InitTimer0();
	Timer1Init();
	while(1)
	{
		KeyScans();
		if(t200ms)
		{
			t200ms = 0;
			Operate_key_val();
		}
		ReadAIN1();
		ReadAIN3();
		volt1 = rd1*1.96;
		volt3 = rb2*1.96;
		DisplaySMG();
		if((puse == 0))
			Led();
	}
}

void Led()
{
	if(volt3_p != 0)
	{
		if(volt3 > volt3_p)
			OperateLed(1,0);
		else
			OperateLed(1,1);
	}
	if(freq_p != 0)
	{
		if(freq > freq_p)
			OperateLed(2,0);
		else
			OperateLed(2,1);
	}
	if(interface == 0)
		OperateLed(3,0);
	else
		OperateLed(3,1);
	if(interface == 1)
		OperateLed(4,0);
	else
		OperateLed(4,1);
	if(interface == 2)
		OperateLed(5,0);
	else
		OperateLed(5,1);
}

sys.c

#include "sys.h"

void Select_74HC138(uchar channel)
{
	switch(channel)
	{
		case 0: P2 = P2 & 0X1F; break;
		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 InitSystem()
{
	Select_74HC138(4);
	P0 = 0XFF;
	Select_74HC138(5);
	P0 = 0X00;
	Select_74HC138(0);
}

void Delay(uint ms)
{
	uint i;
	for(ms; ms > 0; ms--)
		for(i = 921; i > 0; i--);
}

void OperateLed(uchar who,status)
{
	static uchar temp;
	uchar zt;
	switch(status)
	{
		case 0: 
			temp = temp | _crol_(0x01,who-1);
			P0 = ~temp;
			break;
		case 1:
			if(who == 0xff)
			{
				P0 = 0XFF;
				temp = 0;
			}
			else
			{
				zt = (~temp) | _crol_(0x01,who-1);
				if(temp != (~zt))
					temp = ~zt;
				P0 = ~temp;
			}
			break;
		case 2: 
			P0 = ~who;
			temp = who;
			break;
		default: break;
	}
	Select_74HC138(4);
	Select_74HC138(0);
}

uint freq_count;

void InitTimer0()
{
	AUXR |= 0X80;
	TMOD &= 0XF0;
	TMOD |= 0X04;
	TH0 = 0XFF;
	TL0 = 0XFF;
	TF0 = 0;
	TR0 = 1;
	ET0 = 1;
	EA = 1;
}

void ServiceTimer0() interrupt 1
{
	freq_count++;
}

uchar t1 = 0;
uchar count = 0;
uchar puse = 0;
uchar t200ms = 0;

void Timer1Init()		//50毫秒@12.000MHz
{
	AUXR &= 0xBF;		//定时器时钟12T模式
	TMOD &= 0x0F;		//设置定时器模式
	TL1 = 0xB0;		//设置定时初值
	TH1 = 0x3C;		//设置定时初值
	TF1 = 0;		//清除TF1标志
	TR1 = 1;		//定时器1开始计时
	ET1 = 1;
	EA = 1;
}

void ServiceTimer1() interrupt 3
{
	t1++;
	if(t1 % 4 == 0)
	{
		t200ms = 1;
	}
	
	if(t1 == 20)
	{
		t1 = 0;
		freq = freq_count;
		freq_count = 0;
	}
	if(puse == 0)
	{
		if(s7 == 0)
		{
			count++;
			if(count == 40)
			{
				count = 0;
				Select_74HC138(4);
				P0 = 0XFF;
				Select_74HC138(0);
				puse = 1;
			}
		}
	}
	
	if(puse == 1)
	{
		if(s7 == 0)
		{
			count++;
			if(count == 40)
			{
				count = 0;
				
				puse = 0;
				if(puse == 0)
					Led();
			}
		}
	}
}

nixie.c

#include "sys.h"

uchar code nixie[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x8e,0xc8,0xc1,0xbf,0xff};

uint freq;
uint cycle;
uchar channel = 1;
uchar interface;


void DisplayBit(uchar pos,value,bit k)
{
	P0 = 0X00;
	Select_74HC138(6);
	Select_74HC138(0);
	
	if(k)
		P0 = nixie[value] & 0x7f;
	else
		P0 = nixie[value];
	Select_74HC138(7);
	Select_74HC138(0);
	
	P0 = _crol_(0x01,pos);
	Select_74HC138(6);
	Select_74HC138(0);
	
	Delay(1);
}

void DisplayFreq()
{
	DisplayBit(0,10,0);
	if(freq > 999999)
		DisplayBit(1,freq / 1000000,0);
	if(freq > 99999)
		DisplayBit(2,freq / 100000 % 10,0);
	if(freq > 9999)
		DisplayBit(3,freq / 10000 % 10,0);
	if(freq > 999)
		DisplayBit(4,freq / 1000 % 10,0);
	if(freq > 99)
		DisplayBit(5,freq / 100 % 10,0);
	if(freq > 9)
		DisplayBit(6,freq / 10 % 10,0);
	DisplayBit(7,freq % 10,0);
}

void DisplayCycle()
{
	cycle = 1000000 / freq;
	DisplayBit(0,11,0);
	if(cycle > 999999)
		DisplayBit(1,cycle / 1000000,0);
	if(cycle > 99999)
		DisplayBit(2,cycle / 100000 % 10,0);
	if(cycle > 9999)
		DisplayBit(3,cycle / 10000 % 10,0);
	if(cycle > 999)
		DisplayBit(4,cycle / 1000 % 10,0);
	if(cycle > 99)
		DisplayBit(5,cycle / 100 % 10,0);
	if(cycle > 9)
		DisplayBit(6,cycle / 10 % 10,0);
	DisplayBit(7,cycle % 10,0);
}

void DisplayVolt()
{
	DisplayBit(0,12,0);
	DisplayBit(1,13,0);
	DisplayBit(2,channel,0);
	if(channel == 1)
	{
		DisplayBit(5,volt1 / 100,1);
		DisplayBit(6,volt1 / 10 % 10,0);
		DisplayBit(7,volt1 % 10,0);
	}
	else if(channel == 3)
	{
		DisplayBit(5,volt3 / 100,1);
		DisplayBit(6,volt3 / 10 % 10,0);
		DisplayBit(7,volt3 % 10,0);
	}
}

void DisplaySMG()
{
	switch(interface)
	{
		case 0: DisplayFreq(); break;
		case 1: DisplayCycle(); break;
		case 2: DisplayVolt(); break;
	}
}

 key.c

#include "sys.h"

uchar key_val = 20;
uint freq_p;
uint volt3_p;

void KeyScans()
{
	if(key_val == 20)
	{
		if(s4 == 0)
		{
			Delay(10);
			key_val = 4;
			while(s4 == 0)
			{
				DisplaySMG();
			}
		}
		if(s5 == 0)
		{
			Delay(10);
			key_val = 5;
			while(s5 == 0)
			{
				DisplaySMG();
			}
		}
		if(s6 == 0)
		{
			Delay(10);
			key_val = 6;
			while(s6 == 0)
			{
				DisplaySMG();
			}
		}
		if(s7 == 0)
		{
			Delay(10);
			key_val = 7;
			while(s7 == 0)
			{
				DisplaySMG();
					
			}
		}
	}
}

void Operate_key_val()
{
	if(key_val != 20)
	{
		switch(key_val)
		{
			case 4:
				interface = (interface + 1) % 3;
				if(interface == 0)
					channel = 1;
				break;
			case 5:
				if(interface == 2)
				{
					if(channel == 1)
						channel = 3;
					else if(channel == 3)
						channel = 1;
				}
				break;
			case 6: 
				volt3_p = volt3;
				break;
			case 7:
				freq_p = freq;
				break;
		}
	}
	key_val = 20;
}