一、题目
历届的省赛和国赛的题目我已经在前面的文章（点击查看）里给大家分享了（网盘资源），需要的话，直接去下载，我在这里就不再赘述了。
二、hex文件
读者下载这个文件然后用烧录软件直接烧入单片机就可以用了！
链接：https://pan.baidu.com/s/1i4PEk_tmAWgtt1tPJH2rGQ
提取码：clcl
三、主函数实现
提示：比赛过程中，仅仅主函数修改可能不够，有的时候需要注意，比赛官方给的各个驱动的代码是否写完整了，比如有时候，它的.h文件中就没有把这些写全，故意注释掉，你需要去对应的.c文件里找都需要一些什么函数，一个个都补全了才行。
另外，我的代码都是完全在一个文件中写完的，所以各位读者大大用起来就比较方便，可以直接拷贝我的.c文件也可以把内容复制粘贴走，放到你想要的地方去。
上代码：
# include "reg52.h"
# include "ds1302.h"
# include "onewire.h"
typedef unsigned char uchar;
typedef unsigned int uint;
sbit S7 = P3^0;
sbit S6 = P3^1;
sbit S5 = P3^2;
sbit S4 = P3^3;
sbit L1 = P0^0;
uchar duanma[18] = {
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x80,0xc6,0xc0,0x86,0x8e,0xbf,0x7f};
uchar Write_addr[3] = {
0x80,0x82,0x84}; //DS1302时钟每一位写入的地址
uchar Read_addr[3] = {
0x81,0x83,0x85}; //DS1302时钟每一位读取的地址
uchar Timer[3] = {
87,89,35}; //用来存储读取的时间，初始化为23时59分50秒
uchar Clock[3] = {
0,0,0}; //用来存储闹钟的时间，初始化为00时00分00秒
uint temp = 0; //用来存储读取的温度
uint count = 0; //定时器的计数变量
bit smg_f = 1; //控制数码管闪烁的标志变量
uint led_c = 0; //控制LED的计数变量变量
bit led_f = 0; //控制LED闪烁的标志变量
bit led_k = 0; //控制led的开关变量,0为关
uchar k7 = 0; //记录S7的当前状态，0为时钟显示，1为设置时钟的时
uchar k6 = 0; //记录S6的当前状态，0为S6未按下，1为设置闹钟的时
void LEDRunning (); //对LED显示函数进行声明
//=======================锁存器的控制===========================
void SelectHC573 (uchar n)
{
switch (n)
{
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;
case 0:
P2 = (P2 & 0x1f) | 0x00;break;
}
}
//==============================================================
/*========================普通延时函数==========================
void Delay (uint t)
{
while (t--);
}
==============================================================*/
//========================BCD转十进制===========================
uchar BCDtoTEN (uchar dat)
{
dat = (dat /16) * 10 + (dat % 16);
return dat;
}
//==============================================================
//========================Timer[i]BCD的加减 ====================
uchar Timeradd(uchar dat)
{
dat = dat + 1;
switch(dat)
{
case 10:
dat = 16;break; //BCD的10
case 26:
dat = 32;break; //BCD的20
case 42:
dat = 48;break; //BCD的30
case 58:
dat = 64;break; //BCD的40
case 74:
dat = 80;break; //BCD的50
case 90:
dat = 96;break; //BCD的60
}
return dat;
}
uchar Timerminus(uchar dat)
{
dat = dat - 1;
switch(dat)
{
case 79:
dat = 73;break;
case 63:
dat = 57;break;
case 47:
dat = 41;break;
case 31:
dat = 25;break;
case 15:
dat = 9;break;
case -1:
dat = 89;break;
}
return dat;
}
//==============================================================
//========================系统初始化============================
void InitSystem ()
{
SelectHC573(4);
P0 = 0xff;
SelectHC573(5);
P0 = 0x00;
SelectHC573(0);
}
//==============================================================
//=====================定时器T0 - 10ms =========================
void InitTime0 ()
{
TMOD = 0x01;
TH0 = (65535 - 10000) / 256;
TL0 = (65535 - 10000) % 256;
TR0 = 1;
ET0 = 1;
EA = 1;
}
void ServiceT0 () interrupt 1
{
TH0 = (65535 - 10000) / 256;
TL0 = (65535 - 10000) % 256;
count++;
if (count == 100)
{
smg_f = ~smg_f;
count = 0;
}
if (led_k == 1)
{
led_c ++;
if (led_c % 20 == 0)
{
led_f = ~led_f;
if (led_c >= 500)
{
led_k = 0;
led_c = 0;
led_f = 0;
}
}
}
}
//==============================================================
//===================DS1302实时时钟的配置与读取=================
void SetDS1302 ()
{
uchar i;
Write_Ds1302_Byte(0x8e,0x00);
for (i = 0;i<=2;i++)
{
Write_Ds1302_Byte(Write_addr[i],Timer[i]);
}
Write_Ds1302_Byte(0x8e,0x80);
}
void ReadDS1302 ()
{
uchar i;
for (i = 0;i<=2;i++)
{
Timer[i] = Read_Ds1302_Byte(Read_addr[i]);
}
}
//==============================================================
//=====================DS18B20温度读取==========================
void Read_Temp ()
{
uchar LSB;
uchar MSB;
init_ds18b20();
Write_DS18B20(0xcc);
Write_DS18B20(0x44);
init_ds18b20();
Write_DS18B20(0xcc);
Write_DS18B20(0xbe);
LSB = Read_DS18B20();
MSB = Read_DS18B20();
temp = (MSB << 8) | LSB;
if ((temp & 0xf800) == 0x0000)
{
temp = temp >> 4;
}
}
//==============================================================
//====================数码管相关显示函数========================
void Delay_SMG(uint t)
{
while (t--);
}
void ShowSMG_Bit (uchar pos,uchar dat)
{
SelectHC573(7);
P0 = 0xff;
SelectHC573(6);
P0 = 0x01 << pos - 1;
SelectHC573(7);
P0 = dat;
SelectHC573(0);
}
void AllSMG (uchar dat)
{
SelectHC573(6);
P0 = 0xff;
SelectHC573(7);
P0 = dat;
SelectHC573(0);
}
void ShowSMG_Time ()
{
if (k6 == 0)
{
if (((k7 == 1) & (smg_f == 1)) | (k7 == 0) | (k7 == 2) | (k7 == 3))
{
ShowSMG_Bit(1,duanma[Timer[2] / 16]);
Delay_SMG(500);
ShowSMG_Bit(2,duanma[Timer[2] % 16]);
Delay_SMG(500);
}
ShowSMG_Bit(3,duanma[16]);
Delay_SMG(500);
if (((k7 == 2) & (smg_f == 1)) | (k7 == 0) | (k7 == 1) | (k7 == 3))
{
ShowSMG_Bit(4,duanma[Timer[1] / 16]);
Delay_SMG(500);
ShowSMG_Bit(5,duanma[Timer[1] % 16]);
Delay_SMG(500);
}
ShowSMG_Bit(6,duanma[16]);
Delay_SMG(500);
if (((k7 == 3) & (smg_f == 1)) | (k7 == 0) | (k7 == 2) | (k7 == 1))
{
ShowSMG_Bit(7,duanma[Timer[0] / 16]);
Delay_SMG(500);
ShowSMG_Bit(8,duanma[Timer[0] % 16]);
Delay_SMG(500);
}
AllSMG(0xff);
}
else if (k6 != 0)
{
if (((k6 == 1) & (smg_f == 1)) | (k6 == 0) | (k6 == 2) | (k6 == 3))
{
ShowSMG_Bit(1,duanma[Clock[2] / 10]);
Delay_SMG(500);
ShowSMG_Bit(2,duanma[Clock[2] % 10]);
Delay_SMG(500);
}
ShowSMG_Bit(3,duanma[16]);
Delay_SMG(500);
if (((k6 == 2) & (smg_f == 1)) | (k6 == 0) | (k6 == 1) | (k6 == 3))
{
ShowSMG_Bit(4,duanma[Clock[1] / 10]);
Delay_SMG(500);
ShowSMG_Bit(5,duanma[Clock[1] % 10]);
Delay_SMG(500);
}
ShowSMG_Bit(6,duanma[16]);
Delay_SMG(500);
if (((k6 == 3) & (smg_f == 1)) | (k6 == 0) | (k6 == 2) | (k6 == 1))
{
ShowSMG_Bit(7,duanma[Clock[0] / 10]);
Delay_SMG(500);
ShowSMG_Bit(8,duanma[Clock[0] % 10]);
Delay_SMG(500);
}
AllSMG(0xff);
}
}
void ShowSMG_Temp ()
{
ShowSMG_Bit(6,duanma[temp / 10]);
Delay_SMG(500);
ShowSMG_Bit(7,duanma[temp % 10]);
Delay_SMG(500);
ShowSMG_Bit(8,duanma[12]);
Delay_SMG(500);
AllSMG(0xff);
}
//==============================================================
//======================浏览按键================================
void Delay_Key (uchar t)
{
while (t--);
}
void ScanKey ()
{
if (S7 == 0)
{
Delay_Key(100);
if (S7 == 0)
{
while (S7 == 0)
{
ShowSMG_Time ();
LEDRunning ();
ReadDS1302 ();
}
if (led_k == 1)
{
led_k = 0;
led_c = 0;
led_f = 0;
}
k7++;
if (k7 >= 4)
{
k7 = 0;
}
}
}
if (S6 == 0)
{
Delay_Key(100);
if (S6 == 0)
{
while (S6 == 0)
{
ShowSMG_Time ();
LEDRunning ();
ReadDS1302 ();
}
if (led_k == 1)
{
led_k = 0;
led_c = 0;
led_f = 0;
}
k6++;
if (k6 >= 4)
{
k6 = 0;
}
}
}
if (S5 == 0)
{
Delay_Key(100);
if (S5 == 0)
{
while (S5 == 0)
{
ShowSMG_Time ();
LEDRunning ();
ReadDS1302 ();
}
if (led_k == 1)
{
led_k = 0;
led_c = 0;
led_f = 0;
}
if (k7 == 1)
{
Timer[2] = Timeradd(Timer[2]);
if (Timer[2] >= 96)
{
Timer[2] = 0;
}
}
else if (k7 == 2)
{
Timer[1] = Timeradd(Timer[1]);
if (Timer[1] >= 96)
{
Timer[1] = 0;
}
}
else if (k7 == 3)
{
Timer[0
] = Timeradd(Timer[0]);
if (Timer[0] >= 96)
{
Timer[0] = 0;
}
}
if (k6 == 1)
{
Clock[2] = Clock[2] + 1;
if (Clock[2] >= 24)
{
Clock[2] = 0;
}
}
if (k6 == 2)
{
Clock[1] = Clock[1] + 1;
if (Clock[1] >= 60)
{
Clock[1] = 0;
}
}
if (k6 == 3)
{
Clock[0] = Clock[0] + 1;
if (Clock[0] >= 60)
{
Clock[0] = 0;
}
}
SetDS1302 ();
}
}
if (S4 == 0)
{
Delay_Key(100);
if (S4 == 0)
{
while (S4 == 0)
{
if ((k6 == 0) & (k7 == 0))
{
Read_Temp ();
ShowSMG_Temp ();
}
else
{
ShowSMG_Time ();
LEDRunning ();
}
ReadDS1302 ();
}
if (led_k == 1)
{
led_k = 0;
led_c = 0;
led_f = 0;
}
if (k7 == 1)
{
Timer[2] = Timerminus(Timer[2]);
if (Timer[2] == 89)
{
Timer[2] = 35;
}
}
else if (k7 == 2)
{
Timer[1] = Timerminus(Timer[1]);
}
else if (k7 == 3)
{
Timer[0] = Timerminus(Timer[0]);
}
if (k6 == 1)
{
Clock[2] = Clock[2] - 1;
if (Clock[2] == -1)
{
Clock[2] = 23;
}
}
else if (k6 == 2)
{
Clock[1] = Clock[1] - 1;
if (Clock[1] == -1)
{
Clock[1] = 59;
}
}
else if (k6 == 3)
{
Clock[0] = Clock[0] - 1;
if (Clock[0] == -1)
{
Clock[0] = 59;
}
}
SetDS1302 ();
}
}
}
//==============================================================
//======================LED显示函数=============================
void LEDRunning ()
{
if ((BCDtoTEN(Timer[0]) == Clock[0]) & (BCDtoTEN(Timer[1]) == Clock[1]) & (BCDtoTEN(Timer[2]) == Clock[2]))
{
led_k = 1;
}
if (led_f == 1)
{
SelectHC573(4);
L1 = 0;
SelectHC573(0);
}
else if (led_f == 0)
{
SelectHC573(4);
L1 = 1;
SelectHC573(0);
}
}
//==============================================================
//=========================主函数===============================
void main (void)
{
InitSystem ();
SetDS1302 ();
InitTime0 ();
while (1)
{
ReadDS1302 ();
ScanKey ();
ShowSMG_Time ();
LEDRunning ();
}
}
//==============================================================
四、整个工程文件
链接：https://pan.baidu.com/s/15Dsvznn9-74dQubN2pW7bA
提取码：bigo
直接打开这项目如果失败的话，可能是因为keil使用版本问题，我用的是keil3，出现问题的话，可以直接拷贝.c文件的内容，前面我也说了，我的实现过程我在一个.c文件中实现的，方便读者大大取用！
最后
有需要的小伙伴可以随时评论或者私信我，讨论学习过程中的问题，我会尽我所能提供一些帮助的
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蓝桥杯比赛 单片机组 历届省赛题目解答（代码加注释）剩余参见——https://blog.csdn.net/weixin_45386875/article/details/114136549