51单片机数字频率计仿真(可按键切换量程)含源码 -

#include <reg52.h >
#include <intrins.h >
#define uint unsigned int
#define uchar unsigned char
sbit k1=P3^0;
sbit k2=P2^0;
sbit LED=P2^1;
unsigned char code dispbit[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};//共阴数码管
unsigned char code dispcode[11]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00};//显示0-9 /修改新增0x00
unsigned char count [8]={0, 0, 0, 0, 0, 0, 0, 0};//定义数组存放显示数据的各位
unsigned int T0count =0;
unsigned char time1tick =0;
unsigned char i =0,a=0,j=0,y=0;
unsigned int x ;//int最大是65536
void pulse_init (void)
{
TMOD =0x16;//T0工作在方式2,计数器模式,T1工作方式为方式1,定时器模式
TH0=0x00;
TL0=0x00;
TH1=(65536-50000)/256;//50ms中断一次,中断20次完成1秒定时,计算初值
TL1=(65536-50000)%256;
ET0=1;
ET1=1;
//EX0=1;
//EX1=1;
EA=1;
}
void delay (uint ms)
{
unsigned char i,j;
for(i =0; i<ms; i ++)
for(j =0; j<250;j ++)
{
_nop_();
_nop_();
_nop_();
}
}
static void time0_int (void) interrupt 1 using 0
{
T0count ++;
}
void t1(void) interrupt 3 using 0
{
time1tick++;
TH1=(65536-50000)/256;//50ms中断一次，中断50次完成1秒定时，计算初值
TL1=(65536-50000)%256;
if (time1tick==10*a)
{
time1tick=0;
TR0=0;
TR1=0;
ET0=0;
ET1=0;
}
}
void display (void)
{
x=256*T0count+TL0;//转换成10进制
i=7; //数码管的显示高位为数据的低位
while(x)//赋值
{
count[i]=x%10;
x=x/10;
i--;
}
while(i--)
{
count[i]=10;//修改
}
for(i=0;i<8;i++)
{
if(i==7&&j==1)
{
P1=0x80;
delay(1);
}
P0=dispbit[i];
P1=dispcode[count[i]];
delay(1);
}
}
//void int0_int(void) interrupt 0
//{
// j=1;
//}
//void int1_int(void) interrupt 3
//{
// j=0;
//}
void main()
{
if(!k2)
{delay(5);
if(!k2)
j=0;
else
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