单片机频率检测加PWM调速 lcd1602显示 -

#include<reg52.h>
#include "lcd1602.h"
#define uchar unsigned char//宏定义
#define uint unsigned int//宏定义
sbit ji=P2^1;
sbit jia_key=P3^2;
sbit jian_key=P3^3;
uchar sw,w,q,b,s,g,num=0,gao_num=1;di_num=3;
void timer_init ();
void delay (unsigned int a);
unsigned long fre; //频率
unsigned char time; //时间
unsigned long count=0; //计数
void delay(uint z) //延时子程序
{
uint x,y;
for(x = z;x > 0;x--)
for(y = 125;y > 0;y--);
}
/***********************************************************/
/**************************************************/
void timer_init (void) //定时器初始化
{
TMOD = 0x06; //计数器0工作工作方式2，自动重装初值
TH0 = 0; //计数器初值为0
TL0 = 0;
TR0 = 1; //计数器开始计数
ET0 = 1; //打开计数器0中断
RCAP2H = (65536 - 62500) / 256; //在程序初始化的时候给RCAP2H和RCAP2L赋值
RCAP2L = (65536 - 62500) % 256; //TH2与TL2将会在中断产生时断使TH2 = RCAP2H,TL2 = RCAP2L.
TH2 = RCAP2H; //12M晶振喜爱每次中断 62.5ms
TL2 = RCAP2L;
ET2 = 1; //打开定时器2中断
TR2 = 1; //定时器2开始计时
EA = 1; //打开总中断
}
void timer2 (void) interrupt 5 //定时器2中断62.5ms 服务函
{
time++;
TF2 = 0; //定时器2的中断标志位TF2不能由硬件清零，所有要在中断服务程序中将其清零
if (time == 16) //定时1s时间到
{
time = 0; //计时清零
EA = 0; //关闭中断
fre =((long)count*256 + TL0); //count*256强制转换为long型，否则将不产生进位
TL0 = 0; //清零计数器0计数
TH0 = 0;
count = 0; //清零计数器计数
EA = 1; //打开中断
}
}
/****************************************************/
void timer0 (void) interrupt 1 //计数器0中断
{
count++;
}
/*****************************************************/
void display_frequency(unsigned long fre)
{
unsigned char bai,shi,ge,xiao,xiaoo;
bai=fre/10000;
shi=fre%10000/1000;
ge=fre%1000/100;
xiao=fre%100/10;
xiaoo=fre%10;
LCD1602_write_com(0x80+7); //??????????2??9? ???????1??+8??
LCD1602_write_data(0x30+bai); //bai????2??8? ???????,
LCD1602_write_com(0x80+8);
LCD1602_write_data(0x30+shi); //??????,?????1 ??shi?????
LCD1602_write_com(0x80+9);
LCD1602_write_data(0x30+ge); //ge???shi?
LCD1602_write_com(0x80+10);
LCD1602_write_data(0x30+xiao);
LCD1602_write_com(0x80+11);
LCD1602_write_data(0x30+xiaoo);
LCD1602_write_com(0x80+12);
LCD1602_write_word("hz");
}
void key()
{
if(jia_key==0)
{
delay(5);
if(jia_key==0)
{
num++;
if(num==4)
num=3;
while(jia_key==0);
}
}
if(jian_key==0)
{
delay(5);
if(jian_key==0)
{
if(num!=0)
num--;
else
num=0;
while(jian_key==0);
}
}
}
void dispose()
{
switch(num)
{
case 0:gao_num=1;di_num=3;break;
case 1:gao_num=2;di_num=2;break;
case 2:gao_num=3;di_num=1;break;
case 3:gao_num=4;di_num=0;break;
}
}
void qudong()
{
uchar i;
if(di_num!=0)
{
for(i=0;i<di_num;i++)
{
ji=0;
display_frequency(fre);
// delay(2);
}
}
for(i=0;i<gao_num;i++)
{
ji=1;
display_frequency(fre);
// delay(2);
}
}
void main ()
{
timer_init ();//定时/计数器初始化
Init_LCD1602();
while (1)
{
// ji=0;
// display_frequency(fre);
key();
dispose();
qudong();
}
}

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