第十一届蓝桥杯单片机模拟题
个人自己写的程序，为当届比赛的一员，放在这里 ，希望能够检查出不足，或程序的优化，有更多的想法，希望评论（理性）
程序代码
- 库函数（include）
- iic协议
- AT24C02
- 主程序
- ENABLE138代码
- 矩阵键盘
- 数码管显示
试题主要内容 跳跃键-试题内容. 主要时判断输入6个密码是否正确以及修改密码的操作，和AT24c02的编写。（个人理解）下面代码走起！
库函数（include）
#ifndef _INCLUDE_H_
#define _INCLUDE_H_
#define u16 unsigned int
#define u8 unsigned char
#define LED 4
#define ULN 5
#define WEI 6
#define DUAN 7
#include iic协议
#include "iic.h"
#define DELAY_TIME 5
#define SlaveAddrW 0xA0
#define SlaveAddrR 0xA1
sbit SDA = P2^1; /* 数据线 */
sbit SCL = P2^0; /* 时钟线 */
void IIC_Delay(unsigned char i)
{
do{
_nop_();}
while(i--);
}
void IIC_Start(void)
{
SDA = 1;
SCL = 1;
IIC_Delay(DELAY_TIME);
SDA = 0;
IIC_Delay(DELAY_TIME);
SCL = 0;
}
void IIC_Stop(void)
{
SDA = 0;
SCL = 1;
IIC_Delay(DELAY_TIME);
SDA = 1;
IIC_Delay(DELAY_TIME);
}
void IIC_SendAck(bit ackbit)
{
SCL = 0;
SDA = ackbit; // 0应答，1非应答
IIC_Delay(DELAY_TIME);
SCL = 1;
IIC_Delay(DELAY_TIME);
SCL = 0;
SDA = 1;
IIC_Delay(DELAY_TIME);
}
bit IIC_WaitAck(void)
{
bit ackbit;
SCL = 1;
IIC_Delay(DELAY_TIME);
ackbit = SDA;
SCL = 0;
IIC_Delay(DELAY_TIME);
return ackbit;
}
void IIC_SendByte(unsigned char byt)
{
unsigned char i;
for(i=0; i<8; i++)
{
SCL = 0;
IIC_Delay(DELAY_TIME);
if(byt & 0x80) SDA = 1;
else SDA = 0;
IIC_Delay(DELAY_TIME);
SCL = 1;
byt <<= 1;
IIC_Delay(DELAY_TIME);
}
SCL = 0;
}
unsigned char IIC_RecByte(void)
{
unsigned char i, da;
for(i=0; i<8; i++)
{
SCL = 1;
IIC_Delay(DELAY_TIME);
da <<= 1;
if(SDA) da |= 1;
SCL = 0;
IIC_Delay(DELAY_TIME);
}
return da;
}
AT24C02
#include "at24c02.h"
void Delay5ms() //@12.000MHz
{
unsigned char i, j;
i = 59;
j = 90;
do
{
while (--j);
} while (--i);
}
void at24c02_write(u8 add, u8 dat) //add为地址 dat为数据
{
EA = 0;
IIC_Start();
IIC_SendByte(0xa0);
IIC_WaitAck();
IIC_SendByte(add);
IIC_WaitAck();
IIC_SendByte(dat);
IIC_WaitAck();
IIC_Stop();
EA = 1;
Delay5ms();
}
u8 at24c02_read(u8 add)
{
u8 dat;
EA = 0;
IIC_Start();
IIC_SendByte(0xa0);
IIC_WaitAck();
IIC_SendByte(add);
IIC_WaitAck();
IIC_Start();
IIC_SendByte(0xa1);
IIC_WaitAck();
dat = IIC_RecByte();
IIC_SendAck(1);
EA = 1;
return dat;
}
//写入多个数据
void at24c02_writestr(u8 start,u8 *pbuff, u8 num)
{
while(num)
{
at24c02_write(start,*pbuff);
start++;
pbuff++;
num--;
}
}
//读出多个数据
void at24c02_readstr(u8 start, u8 *pbuff, u8 num)
{
while(num)
{
*pbuff = at24c02_read(start);
start++;
pbuff++;
num--;
}
}
主程序
#include "include.h"
u16 timer = 0;
u8 led = 0xff;
u8 nkey;
bit door = 0; //0¹ØÃÅ 1¹ØÃÅ
u16 count = 0;
void Timer0Init(void)
{
AUXR &= 0x7F;
TMOD &= 0xF0;
TL0 = 0x30;
TH0 = 0xF8;
TF0 = 0;
TR0 = 1;
ET0 = 1;
EA = 1; //打开总开关
}
void allint() //初始化
{
P0 = 0xff; //led全熄灭
enable(LED);
P0 = 0x00; //继电器，蜂鸣器关闭
enable(ULN);
P0 = 0x00;
enable(WEI);
P0 = 0xff;
enable(DUAN);
}
void led_run() //led显示
{
P0 = led;
enable(LED);
}
void main()
{
Timer0Init();
allint();
at24c02_writestr(0x00,mima,6); //将密码写入EEROM
buff_change(32,32,32,32,32,32,32,32); //将数码管熄灭
while(1)
{
nkey = jp_buff(); //判断键值
_nop_();
_nop_();
if (nkey != 0) //存在按下 nkey不为0
jp_choose(nkey); //进行选择
if (scan) //输入密码时的显示
{
if (nnum == 0)
{
buff_change(36,32,32,32,32,32,32,32);
}
else if(nnum == 1)
{
buff_change(36,32,32,32,32,32,32,nmima[0]);
}
else if (nnum == 2)
{
buff_change(36,32,32,32,32,32,nmima[0],nmima[1]);
}
else if (nnum == 3)
{
buff_change(36,32,32,32,32,nmima[0],nmima[1],nmima[2]);
}
else if (nnum == 4)
{
buff_change(36,32,32,32,nmima[0],nmima[1],nmima[2],nmima[3]);
}
else if (nnum == 5)
{
buff_change(36,32,32,nmima[0],nmima[1],nmima[2],nmima[3],nmima[4]);
}
else if (nnum == 6 && tf == 2)
{
scan = 0;
buff_change(36,32,nmima[0],nmima[1],nmima[2],nmima[3],nmima[4],nmima[5]);
nnum = 0;
}
}
else if (mscan) // 修改密码时的显示
{
if (nnum == 0)
{
buff_change(12,32,32,32,32,32,32,32);
}
if(nnum == 1)
{
buff_change(12,32,32,32,32,32,32,nmima[0]);
}
else if (nnum == 2)
{
buff_change(12,32,32,32,32,32,nmima[0],nmima[1]);
}
else if (nnum == 3)
{
buff_change(12,32,32,32,32,nmima[0],nmima[1],nmima[2]);
}
else if (nnum == 4)
{
buff_change(12,32,32,32,nmima[0],nmima[1],nmima[2],nmima[3]);
}
else if (nnum == 5)
{
buff_change(12,32,32,nmima[0],nmima[1],nmima[2],nmima[3],nmima[4]);
}
else if (nnum == 6 )
{
buff_change(12,32,nmima[0],nmima[1],nmima[2],nmima[3],nmima[4],nmima[5]);
}
}
}
}
void Tint0() interrupt 1 //2ms
{
smg_display();
led_run();
if(timer++ == 500) // 1s
{
timer = 0;
if (count++ == 5) // 5s
{
count = 0;
if (door == 0) // 门关 进入初始化状态
{
led = 0xff;
buff_change(32,32,32,32,32,32,32,32);
}
else if (door && notdo) // 门开启状态下 5秒没有操作
{
door = 0;
mscan = 0;
P0 = 0x00;
enable(ULN);
buff_change(32,32,32,32,32,32,32,32);
}
}
}
}
ENABLE138代码
库文件就简单地声明
#include "enable138.h"
void enable(u8 x)
{
P2&= 0x1f;
P2|=(x << 5);
_nop_();
_nop_();
P2&= 0x1f;
}
矩阵键盘
包括键值操作
#include "jp.h"
u8 KEY_UP=1;
u16 tf = 0; //0δÅÐ¶Ï 1 ¶Ô 2 ´í
u16 nnum = 0;
bit notdo = 1; //0 Óа´¼ü²Ù×÷£¬1ûÓÐ
bit mscan = 0; // 0 ÐÞ¸ÄδÆô¶¯£¬ 1 ÐÞ¸ÄÆô¶¯
bit scan = 0; // 0δÊäÈ룬1ÊäÈë
u8 mima[6]= {
8,8,8,8,8,8};
u8 nmima[6] = {
0};
void Delay7ms() //@12.000MHz
{
unsigned char i, j;
i = 82;
j = 179;
do
{
while (--j);
} while (--i);
}
//额外操作
void tf_true()
{
P0 = 0x10;
enable(ULN);
door = 1;
notdo = 1;
scan = 0;
nnum = 0;
buff_change(0,32,32,32,0,34,14,35); // open
}
void mima_buff()
{
u16 i;
timer = 0;
count = 0;
//判断对错
for (i = 0;i<6;i++)
{
if(mima[i]!= nmima[i])
{
tf = 2;
break;
}
else
{
tf =1;
}
}
if(tf == 1)
{
tf_true();
}
else if (tf == 2)
{
led = 0xfe;
}
}
//输入存储，只计入前6位
void nmima_scan(u8 key1)
{
nmima[nnum] = key1;
nnum++;
if (nnum == 6)
mima_buff();
}
//密码修改 只计入前6位
void mima_scan(u8 key1)
{
nmima[nnum] = key1;
nnum++;
if (nnum == 6)
{
door = 1;
timer = 0;
count = 0;
}
}
void jp_choose(u8 keys)
{
switch(keys)
{
case 1: //s7
case 2: //s11
case 3: //s15
case 4: //s19
case 5: //s6
case 6: //s10
case 7: //s14
case 8: //s18
case 9: //s5
case 10: //s9
if (scan)
nmima_scan(keys - 1);
else if (mscan)
mima_scan(keys - 1);
break;
case 14: //s8
nnum = 0;
break;
case 15: //s12
timer =0;
count = 0;
if(mscan && nnum >= 6) //确认修改的密码
{
mscan = 0;
buff_change(12,32,32,32,32,32,32,32);
scan = 0;
nnum = 0;
at24c02_writestr(0x00,nmima,6);//将密码写入EEROM
at24c02_readstr(0x00, mima,6);//读取密码存入密码数组
}
else if (door == 1) //进入修改模式 前提 门开
{
nnum = 0;
mscan = 1;
scan = 0;
}
break;
case 16: //s16
//进入输入密码模式
scan = 1;
door =0;
mscan =0;
P0 = 0x00;
enable(ULN);
break;
default:
break;
}
}
u8 jp_buff()
{
u8 keyvalue= 0;//1~16
u8 cache=0;
u8 Hang=0;
u8 Lie=0;
P3&=0xc0;
P3|=0x0f;
P42=0;
P44=0;
if(((P3&0x0f)!=0x0f)&&(KEY_UP))
{
Delay7ms();
P3&=0xc0;
P3|=0x0f;
P42=0;
P44=0;
if(((P3&0x0f)!=0x0f)&&(KEY_UP))
{
KEY_UP=0;
notdo = 0;
cache=P3&0x0f;
switch(cache)
{
case 0x0e:Hang=1; break;
case 0x0d:Hang=2; break;
case 0x0b:Hang=3; break;
case 0x07:Hang=4; break;
}
P3&=0xf0;
P3|=0x30;
P42=1;
P44=1;
if(P44==0) Lie=1;
else if(P42==0) Lie=2;
else if(P35==0) Lie=3;
else if(P34==0) Lie=4;
keyvalue=Hang*4+Lie - 4;
}
}
P3&=0xc0;//bit5 bit4¸´Î»
P3|=0x0f;//bit3~bit0ÖÃλ
P42=0;
P44=0;
if(((P3&0x0f)==0x0f)&&(!KEY_UP))
{
KEY_UP=1;
if (door)
notdo = 1;
}
return keyvalue;
}
数码管显示
#include "smg.h"
u8 code smgDU[37] ={
0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E,
// 0 1 2 3 4 5 6 7 8 9 A B C D E F
0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10,0x08,0x03,0x46,0x21,0x06,0x0E,
// 0. 1. 2. 3. 4. 5. 6. 7. 8. 9. A. B. C. D. E. F.
0xff,0xbf,0x8c,0xc8,0xf7};
// Ãð - p n _
u8 smgWE[8]={
0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};//λѡ
static u16 num =0;
u16 smgbuff[8] = {
32};
void buff_change(u16 d1,d2,d3,d4,d5,d6,d7,d8)//显示内容转换
{
smgbuff[0] = d1;
smgbuff[1] = d2;
smgbuff[2] = d3;
smgbuff[3] = d4;
smgbuff[4] = d5;
smgbuff[5] = d6;
smgbuff[6] = d7;
smgbuff[7] = d8;
}
void smg_display() //将数码管显示
{
P0 = 0xff;
enable(DUAN);
P0 = smgWE[num];
enable(WEI);
P0 = smgDU[smgbuff[num]];
enable(DUAN);
num++;
num &= 7;
}
部分变量为全局变量 如 timer,count,notdo,scan,mscan,led,door,KEY_UP,mima[6],nmima[6],nnum.
因为在库文件中声明，嫌代码太多没有放上。同时 库文件中的部分函数声明同理，请自己声明。不懂可参考我的 模板.
谢谢。