电子密码锁设计

ID:315926 · 发表于 2018-4-25 09:06

/*****************************************************************************

** 电子密码锁设计

**文件名称：main.c

**by 追梦2011-5-12

**功能：支持3~20位的密码设置，初始密码为123456；若要重设密码，需先输入正确密码开锁。

** 正常显示情况下，按下确认键上锁；按下密码键，开始输入密码。

**接线：PE[0..3]----4*4键盘的行线，均用中断方式，上拉输入，下降沿触发

** PE[4..7]----4*4键盘的列线，下拉输入，在中断内临时改为上拉输入，用于读键值

** PD[0..7]----LCD12864 D0~D7

** PD[13..15]--LCD12864 RS,RW,E

** PA.1 连接继电器，低电平时合上，高电平时断开相当于开锁与上锁

*****************************************************************************/

#include "stm32f10x.h"

#include "LCD12864.h"

extern __IO uint16_t keyval;

extern __IO uint16_t keyflag;

uint16_t password[21]={1,2,3,4,5,6,'

}; //初始密码为123456

uint16_t passwordtmp[21];

#define OPEN_DOOR GPIOA->BRR = GPIO_Pin_1

#define CLOSE_DOOR GPIOA->BSRR = GPIO_Pin_1

//数组中存放各个备份数据寄存器基于BKP基地址的偏移地址,用于存储密码

uint16_t BKPDataReg[21] =

{

BKP_DR2, BKP_DR3, BKP_DR4, BKP_DR5, BKP_DR6, BKP_DR7, BKP_DR8, BKP_DR9,

BKP_DR10,BKP_DR11, BKP_DR12, BKP_DR13, BKP_DR14, BKP_DR15,BKP_DR16,BKP_DR17,

BKP_DR18,BKP_DR19, BKP_DR20, BKP_DR21, BKP_DR22

};

/**

* 写密码到备份寄存器，掉电不丢失，电源复位不丢失

*/

void WritePasswordToBackupReg(uint16_t passwordarray[])

{

uint32_t index = 0;

/* 使能写入BKP */

PWR_BackupAccessCmd(ENABLE);

/* 清除事件挂起位 pin Event(TE) */

BKP_ClearFlag();

for (index = 0;passwordarray[index]!='

; index++)

{ //偏移地址和数据

BKP_WriteBackupRegister(BKPDataReg[index],passwordarray[index]);

}

BKP_WriteBackupRegister(BKPDataReg[index], passwordarray[index]); //写入密码结尾符

}

/**

* 上电或复位后读出备份区里保存的密码

*/

void Load_Password(void)

{

uint32_t index =0;

for(index = 0; BKP_ReadBackupRegister(BKPDataReg[index])!='

; index++)

{

password[index]=BKP_ReadBackupRegister(BKPDataReg[index]);

}

password[index]='

;

}

/*************************************************************

**时钟配置函数系统时钟为72MHz

*************************************************************/

void RCC_Configuration()

{

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |RCC_APB2Periph_GPIOC|\

RCC_APB2Periph_GPIOD| RCC_APB2Periph_GPIOE,ENABLE);//使能所有GPIO的时钟

}

//GPIO配置函数

void GPIO_Configuration(void)

{

GPIO_InitTypeDefGPIO_InitStructure;//定义GPIO的模式设置结构体变量

// PA1 接继电器模拟开锁功能

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;

GPIO_Init(GPIOA,&GPIO_InitStructure);

CLOSE_DOOR; // 初始锁上

}

// 矩阵键盘接口配置

void KeyBoard_Config(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

// 行线上拉输入

GPIO_InitStructure.GPIO_Pin = 0x000f;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOE, &GPIO_InitStructure);

// 列线下拉输入

GPIO_InitStructure.GPIO_Pin = 0x00f0;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;

GPIO_Init(GPIOE, &GPIO_InitStructure);

}

// 列线转换为浮空输入

void KeyBoard_Conv(uint16_t GPIO_Pin)

{

GPIO_InitTypeDefGPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOE, &GPIO_InitStructure);

// 列线浮空输入

GPIO_InitStructure.GPIO_Pin = 0x00f0;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOE, &GPIO_InitStructure);

}

/********************************************************************

*名称: EXTI_Configuration

*功能：外部中断配置函数

*说明：PE.0~PE.3 键盘中断

*********************************************************************/

void EXTI_Configuration(void)

{

EXTI_InitTypeDefEXTI_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); //复用功能使能

GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource0);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource1);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource2);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOE, GPIO_PinSource3);

EXTI_ClearITPendingBit(EXTI_Line0); //清除挂起/请求标志

EXTI_ClearITPendingBit(EXTI_Line1); //清除挂起/请求标志

EXTI_ClearITPendingBit(EXTI_Line2);

EXTI_ClearITPendingBit(EXTI_Line3);

// PE.0

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //中断模式

EXTI_InitStructure.EXTI_Trigger= EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_Line = EXTI_Line0;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

// PE.1

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //中断模式

EXTI_InitStructure.EXTI_Trigger= EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_Line = EXTI_Line1;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

// PE.2

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //中断模式

EXTI_InitStructure.EXTI_Trigger= EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_Line = EXTI_Line2;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

// PE.3

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //中断模式

EXTI_InitStructure.EXTI_Trigger= EXTI_Trigger_Falling;

EXTI_InitStructure.EXTI_Line = EXTI_Line3;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;

EXTI_Init(&EXTI_InitStructure);

}

/********************************************************************

*名称: NVIC_Configuration

*功能：中断配置

*说明：PE.0~PE.3 键盘中断,均为下降沿触发

*********************************************************************/

void NVIC_Configuration(void)

{

NVIC_InitTypeDefNVIC_InitStructure;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

// PE.0

NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

NVIC_Init(&NVIC_InitStructure);

// PE.1

NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

NVIC_Init(&NVIC_InitStructure);

// PE.2

NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority= 1;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;

NVIC_Init(&NVIC_InitStructure);

// PE.3

NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;

NVIC_Init(&NVIC_InitStructure);

}

//延时nus

void delay_nus(unsigned long n)

{

unsigned longj;

while(n--)

{ j=15;

while(j--);

}

//延时nms

void delay_nms(unsigned long n)

{

while(n--)

delay_nus(1075);

}

/********************************************************************

*名称: Change_Password

*功能：更改密码

*说明：直到新密码设定完成才退出此函数

*********************************************************************/

void Change_Password(void)

{

uint16_ti,index=0;

uint16_tflag=0;

uint16_tpasswordtmp2[21]={'

};

LCD_Clear();

delay_nms(2);

for(i=0;i<21;i++)

passwordtmp = '

;

LCD_Setpos_DispString(1,1,"请输入新密码:");

delay_nms(2);

LCD_Setpos(2,1);

delay_nms(1);

while(1)

{

keyflag = 0;

while(keyflag < 1)

{ }

keyflag = 0;

if(keyval<=9)

{

LCD_DispChar(keyval+'0');

delay_nms(1);

if(flag==0)

passwordtmp[index++] = keyval;

elsepasswordtmp2[index++] = keyval;

}

elseif((keyval == 'e')&&(flag == 0))

{

passwordtmp[index] = '

;

LCD_Clear();

delay_nms(1);

LCD_Setpos_DispString(1,1,"请再次输入新密码");

delay_nms(2);

LCD_Setpos(2,1);

delay_nms(1);

flag = 1;

index = 0;

}

elseif((keyval == 'e')&&(flag == 1))

{

for(i=0;passwordtmp!='

;i++)

{

if(passwordtmp != passwordtmp2)

{

LCD_Clear();

delay_nms(1);

LCD_Setpos_DispString(1,1,"两次输入密码不同");

delay_nms(2);

LCD_Setpos_DispString(2,1,"请重新设定密码!");

delay_nms(1000);

LCD_Clear();

delay_nms(1);

LCD_Setpos_DispString(1,1,"请再次输入新密码");

delay_nms(2);

LCD_Setpos(2,1);

delay_nms(1);

flag = 0;

index =0;

break;

}

if(passwordtmp=='

)

{

for(i=0;passwordtmp!='

;i++)

{

password = passwordtmp;

}

password = '

;

LCD_Clear();

delay_nms(1);

LCD_Setpos_DispString(2,1,"新密码设定成功！");

delay_nms(2);

LCD_Setpos_DispString(3,1,"请牢记新密码！");

delay_nms(1);

WritePasswordToBackupReg(password); //保存新密码

delay_nms(3000);

break;

}

/********************************************************************

*名称: Input_Password()

*功能：输入密码

*说明：直到密码输入正确或新密码设定完成才退出此函数

*********************************************************************/

void Input_Password()

{

__IO uint16_ti,index=0;

__IO uint16_tfaultcount = 0;

LCD_Clear();

delay_nms(1);

LCD_Setpos_DispString(1,1,"请输入密码:");

delay_nms(2);

LCD_Setpos(2,1);

delay_nms(1);

while(1)

{

keyflag = 0;

while(keyflag < 1)

{ }

keyflag = 0;

if(keyval<=9)

{

LCD_DispChar(keyval+'0');

delay_nms(1);

passwordtmp[index++] = keyval;

}

elseif(keyval == 'c') //按下取消键

{

index--;

passwordtmp[index]='

;

LCD_Clear();

delay_nms(1);

LCD_Setpos_DispString(1,1,"请输入密码:");

delay_nms(2);

LCD_Setpos(2,1);

delay_nms(1);

for(i=0;passwordtmp!='

;i++)

{

LCD_DispChar(passwordtmp+'0');

}

delay_nms(1);

}

elseif(keyval=='e') //按下确认键

{

passwordtmp[index] = '

; //密码结束标记

for(i=0;password!='

;i++)

{

if(passwordtmp !=password)

{

faultcount ++;

break;

}

if(faultcount == 3)

{

faultcount = 0;

CLOSE_DOOR;

LCD_Clear();

delay_nms(1);

LCD_Setpos_DispString(2,1,"密码已经错误 3次");

delay_nms(2);

LCD_Setpos_DispString(3,1,"等待 1分钟后再试");

delay_nms(60000); //密码错误3次以后，等待1分钟才可再次输入

LCD_Clear();

delay_nms(1);

LCD_Setpos_DispString(1,1,"请再次输入密码:");

delay_nms(2);

LCD_Setpos(2,1);

delay_nms(2);

index = 0;

}

else if((faultcount >0) && (password!='

))

{

CLOSE_DOOR;

LCD_Clear();

delay_nms(2);

LCD_Setpos_DispString(2,2,"密码错误！");

delay_nms(1000);

LCD_Clear();

delay_nms(1);

LCD_Setpos_DispString(1,1,"请再次输入密码:");

delay_nms(2);

LCD_Setpos(2,1);

delay_nms(2);

index = 0;

}

if((password=='

)&&(passwordtmp=='

))//输入密码正确

{

LCD_Clear();

delay_nms(1);

LCD_Setpos_DispString(2,3,"密码正确！");

delay_nms(2);

LCD_Setpos_DispString(3,3,"锁已打开！");

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电子密码锁设计

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