本帖最后由 千年约定 于 2021-3-2 20:35 编辑
就用一个地址存 秒钟就没问题用两个分别存读分钟和秒钟就只能存进去一个
求大佬帮助。
单片机源程序如下:
#include "reg52.h" //此文件中定义了单片机的一些特殊功能寄存器
#include "i2c.h"
#define key_S 15
#define key_L key_S*33
#define key_I key_S*25
sbit k1=P3^0;
sbit k2=P3^1;
sbit k4=P3^3;
sbit k8=P3^7;
bit flag=0;
bit flash=0;
char sec=0,min=0;
unsigned char sec_s=0,min_s=0;
unsigned int Cnt10ms=0;
unsigned char num=0;
unsigned char shu=0;
unsigned char KeyValue=0;
unsigned char DisplayData[8];
unsigned char code dongtai[]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(unsigned int i)
{
while(--i);
}
void Timer0Init()
{
TMOD |= 0x01;
TH0 = 0xD8;
TL0 = 0xF0;
TF0 = 0;
TR0 = 1;
ET0=1;
EA=1;
}
void keyscan()
{
static unsigned int time=0;
if(!k1||!k2||!k4||!k8)
{
time++;
if(time>key_L)
time=key_I;
if(time==key_S)
{
if(!k1 && KeyValue==0)
{
if(shu>=0)
{
flag=1;
// min_s=At24c02Read(1);
sec_s= At24c02Read(2);
min=min_s;
sec=sec_s;
}
}
if(k2!=0xFF)
delay(30000);
if(k2!=0xFF)
KeyValue=++KeyValue%4;
}
if(time==key_S||time==key_L)
{
if(!k4 && KeyValue>0)
{
switch(KeyValue)
{
case 3: if(shu<99)shu++; break;
case 1: if(min_s<99)min_s++; break;
case 2: if(sec_s<59)sec_s++; break;
}
}
if(!k8 && KeyValue>0)
{
switch(KeyValue)
{
case 3: if(shu>0)shu--; break;
case 1: if(min_s>0)min_s--; break;
case 2: if(sec_s>0)sec_s--; break;
}
}
// At24c02Write(1,min_s);
At24c02Write(2,sec_s);
}
}
else time=0;
}
void BufferMemory()
{
if(KeyValue==0)
{
DisplayData[0]=dongtai[shu/10];
DisplayData[1]=dongtai[shu%10];
DisplayData[4]=dongtai[min/10];
DisplayData[5]=dongtai[min%10]+0x80;
DisplayData[6]=dongtai[sec/10];
DisplayData[7]=dongtai[sec%10];
}
else
{
if(KeyValue==3&&flash==1)
{
DisplayData[0]=0;
DisplayData[1]=0;
}
else
{
DisplayData[0]=dongtai[shu/10];
DisplayData[1]=dongtai[shu%10];
}
if(KeyValue==1&&flash==1)
{
DisplayData[4]=0;
DisplayData[5]=0x80;
}
else
{
DisplayData[4]=dongtai[min_s/10];
DisplayData[5]=dongtai[min_s%10]+0x80;
}
if(KeyValue==2&&flash==1)
{
DisplayData[6]=0;
DisplayData[7]=0;
}
else
{
DisplayData[6]=dongtai[sec_s/10];
DisplayData[7]=dongtai[sec_s%10];
}
}
}
void display()
{
static unsigned char t=0;
P0=0x00;
P2&=0xe3;
P2|=(t<<2);
P0=DisplayData[t];
t=++t%8;
}
void main()
{
Timer0Init();
DisplayData[2]=0x80;
DisplayData[3]=0x80;
while(1)
{
keyscan();
BufferMemory();
display();
delay(125);
}
}
void Timer0() interrupt 1
{
TH0 = 0xD8;
TL0 = 0xF0;
if(flag)
{
if(min|sec!=0)
{
Cnt10ms++;
if(Cnt10ms>=100)
{
Cnt10ms=0;
sec--;
if(min==0&&sec==0)
{
flag=0;
shu++;
if(shu>=9)
shu=1;
}
else if(sec<0)
{
min--;
sec=59;
}
}
}
else flag=0;
}
if(++num==20)
{
num=0;
flash=~flash;
}
}
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