智能门禁的项目

项目需求

矩阵键盘输入密码，正确开锁，错误提示，三次错误后蜂鸣器响三秒；
按下#号确认输入，按下*号修改密码；
密码保存在W25Q128里；
OLED屏幕显示信息。

硬件清单

矩阵键盘	OLED显示屏	继电器	蜂鸣器	W25Q128存储器
开发板	ST-Link	USB转TTL	杜邦线	------

其中，OLED显示器利用的是I2C的通信协议，W25Q128用的是SPI的通信协议；

矩阵键盘这节课进行介绍。

硬件接线

简图：

模块：矩阵键盘（原理+驱动）

学了了独立按键之后，发现使用一个按键就要浪费一个IO口。那有没有一种节约GPIO的方法，比如要用16个按键，怎么样才能节省IO口？那我们就可以用矩阵键盘。16个按键，只需8个IO口。

矩阵键盘介绍

我们矩阵键盘的型号多种多样，有 1x4、3x3、3x4、4x4，甚至是 8x8 的；有薄膜的，有按键的。

矩阵键盘常见用途：

1. 电子密码锁

2. ATM 的键盘

3. POS机的键盘

4. 家用电器的控制面板（微波炉、洗衣机等）

工作参数及引脚介绍

引脚介绍：

按键式的有的有引脚标识，R 是行，C 是列。有的没有引脚标识，可以找商家问下，或者自己看原理图。

薄膜式的都没有引脚标识。键盘正对自己，引脚是先行后列，从小到大。

矩阵键盘工作原理

这是矩阵键盘（4x4）内部电路示意图：

矩阵键盘识别常用——逐行逐列扫描法

使列线连接的I/O引脚输出低电平，四条行线所连接的I/O引脚输出高电平，当没有按键按下时，四条行线所连接的I/O引脚读取的将全部是高电平；当按键按下时，由于按键所在的行线与列线相通，行线将被下拉到低电阻。此时读取行线所连接的引脚，将不再是高电平。
逐列将列线依次置低电平，读取行线，如果某一条行线为低电平，则说明该行线与当前的行线为低电平的列线交叉点处的按键被按下，从判断按键按下。

中断来实现识别

把所有行引脚设成中断引脚，默认是上拉输入，下降沿触发，GPIO引脚输出高电平。
把所有列引脚连接的GPIO引脚设成输入，内部下拉。（GPIO引脚输入，默认是下拉）
当有中断触发的时候就可以知道哪一行有按键按下，再逐列看哪一列变成高电平，就是哪个按键被触发了。

小实验：串口输出矩阵键盘按下的按键

硬件清单：

STM32F103C8T6、矩阵键盘(3x4，薄膜)、USB转TTL、ST-Link

硬件接线：

文件代码：

keyboard.c

#include "keyboard.h"
#include "delay.h"

uint8_t key_value;

void keyboard_init(void){
    
    //打开时钟
    __HAL_RCC_GPIOB_CLK_ENABLE();
    //调用GPIO的初始化函数
    GPIO_InitTypeDef GPIO_Initstruct;
    
    GPIO_Initstruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_10;
    GPIO_Initstruct.Mode = GPIO_MODE_IT_FALLING;
    GPIO_Initstruct.Pull = GPIO_PULLUP;
    GPIO_Initstruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOB, &GPIO_Initstruct);
    
    GPIO_Initstruct.Pin = GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14;
    GPIO_Initstruct.Mode = GPIO_MODE_INPUT;
    GPIO_Initstruct.Pull = GPIO_PULLDOWN;    //配置成下拉模式，当导通时，会变成高电平
    GPIO_Initstruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOB, &GPIO_Initstruct); 
    
    HAL_NVIC_SetPriority(EXTI0_IRQn,2,2);
    HAL_NVIC_EnableIRQ(EXTI0_IRQn);
    
    HAL_NVIC_SetPriority(EXTI1_IRQn,2,2);
    HAL_NVIC_EnableIRQ(EXTI1_IRQn);
    
    HAL_NVIC_SetPriority(EXTI2_IRQn,2,2);
    HAL_NVIC_EnableIRQ(EXTI2_IRQn);
    
    HAL_NVIC_SetPriority(EXTI15_10_IRQn,2,2);
    HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
    
}

void EXTI0_IRQHandler(void){
    
    HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_0);
    
}

void EXTI1_IRQHandler(void){
    
    HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_1);
    
}
void EXTI2_IRQHandler(void){
    
    HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_2); 
}
void EXTI15_10_IRQHandler(void){
    
    HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_10);
    
}

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){
    uint8_t row = 0,column = 0;
    if(key_value != 0) return;    //防止手速过快，只读取第一次按下时的按键值
    
    //确定行
    if(GPIO_Pin == GPIO_PIN_0)
        row  = 0x10;
    else if(GPIO_Pin == GPIO_PIN_1)
        row = 0x20;
    else if(GPIO_Pin == GPIO_PIN_2)
        row = 0x30;
    else if(GPIO_Pin == GPIO_PIN_10)
        row = 0x40;
    
    //确定列
    if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_11) == GPIO_PIN_SET){
        delay_ms(10);
        while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_11) == GPIO_PIN_SET);
        column = 0x01;
    }
    else if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_12) == GPIO_PIN_SET){
        delay_ms(10);
        while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_12) == GPIO_PIN_SET);
        column = 0x02;
    }
     else if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_13) == GPIO_PIN_SET){
        delay_ms(10);
        while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_13) == GPIO_PIN_SET);
        column = 0x03;
    }
     else if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_14) == GPIO_PIN_SET){
        delay_ms(10);
        while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_14) == GPIO_PIN_SET);
        column = 0x04;
    }
     
    if(row != 0 && column != 0)
        key_value = row | column;    //按位与进行拼接
}

uint8_t keyboard_get_value(void){
    uint8_t ch = 0;
    if(key_value != 0)
    {
        if(key_value == 0x11) ch = '1';
        else if(key_value == 0x12) ch = '2';
        else if(key_value == 0x13) ch = '3';
        else if(key_value == 0x14) ch = 'A';
        
        else if(key_value == 0x21) ch = '4';
        else if(key_value == 0x22) ch = '5';
        else if(key_value == 0x23) ch = '6';
        else if(key_value == 0x24) ch = 'B';
        
        else if(key_value == 0x31) ch = '7';
        else if(key_value == 0x32) ch = '8';
        else if(key_value == 0x33) ch = '9';
        else if(key_value == 0x34) ch = 'C';
        
        else if(key_value == 0x41) ch = '*';
        else if(key_value == 0x42) ch = '0';
        else if(key_value == 0x43) ch = '#';
        else if(key_value == 0x44) ch = 'D';
        delay_ms(400);
        key_value = 0x00;
    }
    return ch;
}

keyboard.h

#ifndef __KEYBOARD_H__
#define __KEYBOARD_H__
#include "stm32f1xx.h"

void keyboard_init(void);
uint8_t keyboard_get_value(void);

#endif

main.c文件代码

#include "sys.h"
#include "led.h"
#include "delay.h"
#include "uart1.h"
#include "keyboard.h"


int main(void)
{
    HAL_Init();                         /* 初始化HAL库 */
    stm32_clock_init(RCC_PLL_MUL9);     /* 设置时钟, 72Mhz */
    led_init();                         /* LED初始化 */
    uart1_init(115200);
    printf("hello,world");
    keyboard_init();
    
    uint8_t key_value = 0;
    
    while(1)
    { 
        key_value = keyboard_get_value();
        if(key_value != 0){
            printf("按下了：%c \r\n",key_value);
            key_value = 0;
        }
    }
}

注意：这个代码采用的是配置中断来实现，要回顾关于中断的配置流程。

项目框图

（要养成习惯，在做项目的时候一定要配置流程图）

项目代码

输出设备

OLED

oled.c文件代码：

#include "oled.h"
#include "delay.h"
#include "font.h"

void oled_gpio_init(void){
    GPIO_InitTypeDef gpio_initstruct;
    OLED_I2C_SCL_CLK();
    OLED_I2C_SDA_CLK();
    
    gpio_initstruct.Pin = OLED_I2C_SCL_PIN;
    gpio_initstruct.Mode = GPIO_MODE_OUTPUT_OD;
    gpio_initstruct.Pull = GPIO_PULLUP;
    gpio_initstruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(OLED_I2C_SCL_PORT,&gpio_initstruct);
    
    gpio_initstruct.Pin = OLED_I2C_SDA_PIN;
    HAL_GPIO_Init(OLED_I2C_SDA_PORT,&gpio_initstruct);
    
}

/**
* @breif 配置I2C协议的时序图：开始，读写，应答，结束。
* @note     在配置读写时序的时候，要注意。。。。。
*
*/
void oled_i2c_start(void){
    OLED_SCL_SET();
    OLED_SDA_SET();
    OLED_SDA_RESET();
    OLED_SCL_RESET();
}

void oled_i2c_stop(void){
    OLED_SCL_RESET();
    OLED_SDA_RESET();
    OLED_SCL_SET();
    OLED_SDA_SET();
}
void oled_i2c_ack(void){
    OLED_SCL_SET();
    OLED_SCL_RESET();
}

void oled_i2c_write_byte(uint8_t data){
    uint8_t i,temp;
    temp = data;
    for(i = 0;i < 8 ;i++){
        if((temp & 0x80) == 0x80)
            OLED_SDA_SET();
        else
            OLED_SDA_RESET();
        temp = temp << 1;
        OLED_SCL_SET();
        OLED_SCL_RESET();
    }
}


/**
* @breif    利用I2C的时序图，配置OLED相关的写命令和写指令的函数
* @note     
*
*/
void oled_write_cmd(uint8_t cmd){
    oled_i2c_start();
    oled_i2c_write_byte(0x78);
    oled_i2c_ack();
    oled_i2c_write_byte(0x00);
    oled_i2c_ack();
    oled_i2c_write_byte(cmd);
    oled_i2c_ack();
    oled_i2c_stop();
}

void oled_write_date(uint8_t data){
    oled_i2c_start();
    oled_i2c_write_byte(0x78);
    oled_i2c_ack();
    oled_i2c_write_byte(0x40);
    oled_i2c_ack();
    oled_i2c_write_byte(data);
    oled_i2c_ack();
    oled_i2c_stop();
    
}


/**
* @breif    初始化OLED显示屏的函数
* @note     包括初始化GPIO引脚和初始化OLED的1相关命令
*
*/
void oled_init(void){
    oled_gpio_init();
    //初始化后要发送一系列的命令要进行发送。
    delay_ms(100);
    
    oled_write_cmd(0xAE);    //设置显示开启/关闭，0xAE关闭，0xAF开启

    oled_write_cmd(0xD5);    //设置显示时钟分频比/振荡器频率
    oled_write_cmd(0x80);    //0x00~0xFF

    oled_write_cmd(0xA8);    //设置多路复用率
    oled_write_cmd(0x3F);    //0x0E~0x3F

    oled_write_cmd(0xD3);    //设置显示偏移
    oled_write_cmd(0x00);    //0x00~0x7F

    oled_write_cmd(0x40);    //设置显示开始行，0x40~0x7F

    oled_write_cmd(0xA1);    //设置左右方向，0xA1正常，0xA0左右反置

    oled_write_cmd(0xC8);    //设置上下方向，0xC8正常，0xC0上下反置

    oled_write_cmd(0xDA);    //设置COM引脚硬件配置
    oled_write_cmd(0x12);

    oled_write_cmd(0x81);    //设置对比度
    oled_write_cmd(0xCF);    //0x00~0xFF

    oled_write_cmd(0xD9);    //设置预充电周期
    oled_write_cmd(0xF1);

    oled_write_cmd(0xDB);    //设置VCOMH取消选择级别
    oled_write_cmd(0x30);

    oled_write_cmd(0xA4);    //设置整个显示打开/关闭

    oled_write_cmd(0xA6);    //设置正常/反色显示，0xA6正常，0xA7反色

    oled_write_cmd(0x8D);    //设置充电泵
    oled_write_cmd(0x14);

    oled_write_cmd(0xAF);    //开启显示 
    
    oled_fill(0x00);
    
}

/**
* @breif    设置oled显示屏显示的坐标
* @note     
*/
void oled_set_cursor(uint8_t x,uint8_t y){
    oled_write_cmd(0xB0 + x);
    oled_write_cmd((y & 0x0F) | 0x00);   //取x的低位
    oled_write_cmd(((y & 0xF0) >> 4) | 0x10);  //取高位
}


/**
* @breif    设置oled显示屏清屏函数
* @note     
*/
void oled_fill(uint8_t data){
    uint8_t i,j;
    for (i = 0;i < 8 ;i++){
        oled_set_cursor(i,0);
        for(j = 0;j < 128;j++)
            oled_write_date(data);
    } 
}

/**
* @breif    封装oled显示屏显示字符、字符串、汉字、图像的函数
* @note     
*/

void oled_show_char(uint8_t x ,uint8_t y,uint8_t number ,uint8_t size){         //size代表的是高度
    
    number = number - ' ';
    uint8_t i,j,page;                       //page:表示输入的字符总共需要的PAGE
    
    page = size / 8;
    if(size % 8 != 0)
        page ++;
 
    for (i = 0;i < page; i++)
    {
        oled_set_cursor(x+i,y);
        for (j = size / 2 * i;j < size / 2 * (i + 1); j++){              //size/2：高度的一半是宽度
            if(size == 16)
                oled_write_date(ascii_8X16[number][j]);                   
        }
    }
}

//显示字符串
void oled_show_string(uint8_t x,uint8_t y,char *p ,uint8_t size){
    
    while(*p != '\0'){
        oled_show_char(x,y,*p,size);      //*p:取出数组中的首元素
        y += size / 2;
        p++;                               //p++：代表的是数组指针递增，指向下一个元素地址。
    }
}

//void oled_show_chinese(uint8_t x,uint8_t y, uint8_t N ,uint8_t size){

//    uint8_t i,j;
//    for (i = 0 ; i < size / 8 ;i++){
//        oled_set_cursor(x+i,y);
//        for(j = size * i;j < size * (i + 1);j++){
//            if(size == 16)
//                oled_write_date(chinese_16X16[N][j]);
            if(size == 24)
                oled_write_date(chinese_24X24[N][j]);
//        }
//    }
//}

//显示汉字的函数
void oled_show_chinese(uint8_t x,uint8_t y, uint8_t N ,uint8_t message_type){

    uint8_t i,j;
    for (i = 0 ; i < 2 ;i++){
        oled_set_cursor(x+i,y);
        for(j = 16 * i;j < 16 * (i + 1);j++){
            switch (message_type){
                case SHOW_INPUT_PWD:
                    oled_write_date(chinese_enter_password[N][j]);
                    break;
                
                case SHOW_PWD_RIGHT:
                    oled_write_date(chinese_password_right[N][j]);
                    break;
                
                case SHOW_PWD_ERROR:
                    oled_write_date(chinese_password_error[N][j]);
                    break;
                
                case SHOW_INPUT_OLD_PWD:
                    oled_write_date(chinese_enter_oldPassword[N][j]);
                    break;
                
                case SHOW_INPUT_NEW_PWD:
                    oled_write_date(chinese_enter_newPassword[N][j]);
                    break;
                
                case SHOW_PWD_CHANGE:
                    oled_write_date(modify_passWord_complete[N][j]);
                    break;
                
                case SHOW_SET_PWD:
                    oled_write_date(set_passWord[N][j]);
                    break;
                
                default:
                    break;  
            }
        }
    }
}

//请输入密码
void oled_show_input(void){
    oled_fill(0x00);
    oled_show_chinese(1,10,0,SHOW_INPUT_PWD);
    oled_show_chinese(1,30,1,SHOW_INPUT_PWD);
    oled_show_chinese(1,50,2,SHOW_INPUT_PWD);
    oled_show_chinese(1,70,3,SHOW_INPUT_PWD);
    oled_show_chinese(1,90,4,SHOW_INPUT_PWD);
    oled_show_char(1,110,':',16);
}
//密码正确
void oled_pwd_right(void){
    oled_fill(0x00);
    oled_show_chinese(1,10,0,SHOW_PWD_RIGHT);
    oled_show_chinese(1,30,1,SHOW_PWD_RIGHT);
    oled_show_chinese(1,50,2,SHOW_PWD_RIGHT);
    oled_show_chinese(1,70,3,SHOW_PWD_RIGHT);
    oled_show_char(1,90,':',16);
}
//密码错误
void oled_pwd_error(void){
    oled_fill(0x00);
    oled_show_chinese(1,10,0,SHOW_PWD_ERROR);
    oled_show_chinese(1,30,1,SHOW_PWD_ERROR);
    oled_show_chinese(1,50,2,SHOW_PWD_ERROR);
    oled_show_chinese(1,70,3,SHOW_PWD_ERROR);
    oled_show_char(1,110,':',16);
}
//请输入旧密码
void oled_input_old_pwd(void){
    oled_fill(0x00);
    oled_show_chinese(1,10,0,SHOW_INPUT_OLD_PWD);
    oled_show_chinese(1,26,1,SHOW_INPUT_OLD_PWD);
    oled_show_chinese(1,42,2,SHOW_INPUT_OLD_PWD);
    oled_show_chinese(1,58,3,SHOW_INPUT_OLD_PWD);
    oled_show_chinese(1,74,4,SHOW_INPUT_OLD_PWD);
    oled_show_chinese(1,90,5,SHOW_INPUT_OLD_PWD);
    oled_show_char(1,106,':',16);
}
//请输入新密码
void oled_input_new_pwd(void){
    oled_fill(0x00);
    oled_show_chinese(1,10,0,SHOW_INPUT_NEW_PWD);
    oled_show_chinese(1,26,1,SHOW_INPUT_NEW_PWD);
    oled_show_chinese(1,42,2,SHOW_INPUT_NEW_PWD);
    oled_show_chinese(1,58,3,SHOW_INPUT_NEW_PWD);
    oled_show_chinese(1,74,4,SHOW_INPUT_NEW_PWD);
    oled_show_chinese(1,90,4,SHOW_INPUT_NEW_PWD);
    oled_show_char(1,106,':',16);
}
//密码修改完成
void oled_modif_pwd_complete(void){
    oled_fill(0x00);
    oled_show_chinese(1,10,0,SHOW_PWD_CHANGE);
    oled_show_chinese(1,26,1,SHOW_PWD_CHANGE);
    oled_show_chinese(1,42,2,SHOW_PWD_CHANGE);
    oled_show_chinese(1,58,3,SHOW_PWD_CHANGE);
    oled_show_chinese(1,74,4,SHOW_PWD_CHANGE);
    oled_show_chinese(1,90,5,SHOW_PWD_CHANGE);
    oled_show_char(1,106,':',16);
}
//请设置密码
void oled_set_pwd(void){
    oled_fill(0x00);
    oled_show_chinese(1,10,0,SHOW_SET_PWD);
    oled_show_chinese(1,30,1,SHOW_SET_PWD);
    oled_show_chinese(1,50,2,SHOW_SET_PWD);
    oled_show_chinese(1,70,3,SHOW_SET_PWD);
    oled_show_chinese(1,90,4,SHOW_SET_PWD);
    oled_show_char(1,110,':',16);
}

//显示图像
 void oled_show_image(uint8_t x,uint8_t y, uint8_t width ,uint8_t highth ,uint8_t * bpm){
     uint8_t i,j;
     for(i = 0; i < highth ;i++)
     {
         oled_set_cursor(x+i,j);
         for(j = 0;j < width;j++)
            oled_write_date(bpm[ width * i + j ]);
     }
 }

oled.h文件代码：

#ifndef __OLED_H__
#define __OLED_H__
#include "stm32f1xx.h"

enum message{
    SHOW_INPUT_PWD = 0,
    SHOW_PWD_RIGHT,
    SHOW_PWD_ERROR,
    SHOW_INPUT_OLD_PWD,
    SHOW_INPUT_NEW_PWD,
    SHOW_PWD_CHANGE,
    SHOW_SET_PWD
    
};


#define OLED_I2C_SCL_CLK()       __HAL_RCC_GPIOB_CLK_ENABLE()
#define OLED_I2C_SCL_PORT       GPIOB
#define OLED_I2C_SCL_PIN        GPIO_PIN_8

#define OLED_I2C_SDA_CLK()      __HAL_RCC_GPIOB_CLK_ENABLE()
#define OLED_I2C_SDA_PORT       GPIOB
#define OLED_I2C_SDA_PIN        GPIO_PIN_9

#define OLED_SCL_RESET()          HAL_GPIO_WritePin(OLED_I2C_SCL_PORT,OLED_I2C_SCL_PIN,GPIO_PIN_RESET)
#define OLED_SCL_SET()            HAL_GPIO_WritePin(OLED_I2C_SCL_PORT,OLED_I2C_SCL_PIN,GPIO_PIN_SET)

#define OLED_SDA_RESET()          HAL_GPIO_WritePin(OLED_I2C_SDA_PORT,OLED_I2C_SDA_PIN,GPIO_PIN_RESET)
#define OLED_SDA_SET()            HAL_GPIO_WritePin(OLED_I2C_SDA_PORT,OLED_I2C_SDA_PIN,GPIO_PIN_SET)


void oled_init(void);
void oled_set_cursor(uint8_t x,uint8_t y);
void oled_fill(uint8_t data);
void oled_write_date(uint8_t data);
void oled_show_char(uint8_t x ,uint8_t y,uint8_t number ,uint8_t size);
void oled_show_string(uint8_t x,uint8_t y,char *p ,uint8_t size);
void oled_show_chinese(uint8_t x, uint8_t y, uint8_t N, uint8_t size);
void oled_show_image(uint8_t x,uint8_t y, uint8_t width ,uint8_t highth,uint8_t * bpm);

void oled_show_input(void);
void oled_pwd_right(void);
void oled_pwd_error(void);
void oled_input_old_pwd(void);
void oled_input_new_pwd(void);
void oled_modif_pwd_complete(void);
void oled_set_pwd(void);


#endif

font.h文件代码

#ifndef __FONT_H__
#define __FONT_H__

//请输入密码；
const unsigned char chinese_enter_password[][32] = {
    0x40,0x42,0xCC,0x00,0x00,0x44,0x54,0x54,0x54,0x7F,0x54,0x54,0x54,0x44,0x40,0x00,
    0x00,0x00,0x7F,0x20,0x10,0x00,0xFF,0x15,0x15,0x15,0x55,0x95,0x7F,0x00,0x00,0x00,/*"请",0*/
        
    0x88,0x68,0x1F,0xC8,0x08,0x10,0xC8,0x54,0x52,0xD1,0x12,0x94,0x08,0xD0,0x10,0x00,
    0x09,0x19,0x09,0xFF,0x05,0x00,0xFF,0x12,0x92,0xFF,0x00,0x5F,0x80,0x7F,0x00,0x00,/*"输",1*/
        
    0x00,0x00,0x00,0x00,0x00,0x01,0xE2,0x1C,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
    0x80,0x40,0x20,0x10,0x0C,0x03,0x00,0x00,0x00,0x03,0x0C,0x30,0x40,0x80,0x80,0x00,/*"入",2*/
        
    0x10,0x8C,0x44,0x04,0xE4,0x04,0x95,0xA6,0x44,0x24,0x14,0x84,0x44,0x94,0x0C,0x00,
    0x02,0x02,0x7A,0x41,0x41,0x43,0x42,0x7E,0x42,0x42,0x42,0x43,0xF8,0x00,0x00,0x00,/*"密",3*/
        
    0x04,0x84,0xE4,0x5C,0x44,0xC4,0x00,0x02,0xF2,0x82,0x82,0x82,0xFE,0x80,0x80,0x00,
    0x02,0x01,0x7F,0x10,0x10,0x3F,0x00,0x08,0x08,0x08,0x08,0x48,0x88,0x40,0x3F,0x00,/*"码",4*/
};

//密码正确；
const unsigned char chinese_password_right[][32] = {
    0x10,0x8C,0x44,0x04,0xE4,0x04,0x95,0xA6,0x44,0x24,0x14,0x84,0x44,0x94,0x0C,0x00,
    0x02,0x02,0x7A,0x41,0x41,0x43,0x42,0x7E,0x42,0x42,0x42,0x43,0xF8,0x00,0x00,0x00,/*"密",0*/
    
    0x04,0x84,0xE4,0x5C,0x44,0xC4,0x00,0x02,0xF2,0x82,0x82,0x82,0xFE,0x80,0x80,0x00,
    0x02,0x01,0x7F,0x10,0x10,0x3F,0x00,0x08,0x08,0x08,0x08,0x48,0x88,0x40,0x3F,0x00,/*"码",1*/
    
    0x00,0x02,0x02,0xC2,0x02,0x02,0x02,0xFE,0x82,0x82,0x82,0x82,0x82,0x02,0x00,0x00,
    0x40,0x40,0x40,0x7F,0x40,0x40,0x40,0x7F,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,/*"正",2*/
    
    0x04,0x84,0xE4,0x5C,0x44,0xC4,0x20,0x10,0xE8,0x27,0x24,0xE4,0x34,0x2C,0xE0,0x00,
    0x02,0x01,0x7F,0x10,0x10,0x3F,0x80,0x60,0x1F,0x09,0x09,0x3F,0x49,0x89,0x7F,0x00,/*"确",3*/
};
//密码错误；
const unsigned char chinese_password_error[][32] = {
    0x10,0x8C,0x44,0x04,0xE4,0x04,0x95,0xA6,0x44,0x24,0x14,0x84,0x44,0x94,0x0C,0x00,
    0x02,0x02,0x7A,0x41,0x41,0x43,0x42,0x7E,0x42,0x42,0x42,0x43,0xF8,0x00,0x00,0x00,/*"密",0*/
    
    0x04,0x84,0xE4,0x5C,0x44,0xC4,0x00,0x02,0xF2,0x82,0x82,0x82,0xFE,0x80,0x80,0x00,
    0x02,0x01,0x7F,0x10,0x10,0x3F,0x00,0x08,0x08,0x08,0x08,0x48,0x88,0x40,0x3F,0x00,/*"码",1*/
    
    0x40,0x30,0xEF,0x24,0x64,0x48,0x48,0x7F,0x48,0x48,0x48,0x7F,0x48,0x48,0x40,0x00,
    0x01,0x01,0x7F,0x21,0x11,0x00,0xFF,0x49,0x49,0x49,0x49,0x49,0xFF,0x00,0x00,0x00,/*"错",2*/
    
    0x40,0x42,0xCC,0x00,0x00,0x80,0x9E,0x92,0x92,0x92,0x92,0x92,0x9E,0x80,0x00,0x00,
    0x00,0x00,0x7F,0x20,0x94,0x84,0x44,0x24,0x14,0x0F,0x14,0x24,0x44,0x84,0x84,0x00,/*"误",3*/
};

//请输入旧密码；
const unsigned char chinese_enter_oldPassword[][32] = {
    0x40,0x42,0xCC,0x00,0x00,0x44,0x54,0x54,0x54,0x7F,0x54,0x54,0x54,0x44,0x40,0x00,
    0x00,0x00,0x7F,0x20,0x10,0x00,0xFF,0x15,0x15,0x15,0x55,0x95,0x7F,0x00,0x00,0x00,/*"请",0*/
    
    0x88,0x68,0x1F,0xC8,0x08,0x10,0xC8,0x54,0x52,0xD1,0x12,0x94,0x08,0xD0,0x10,0x00,
    0x09,0x19,0x09,0xFF,0x05,0x00,0xFF,0x12,0x92,0xFF,0x00,0x5F,0x80,0x7F,0x00,0x00,/*"输",1*/
    
    0x00,0x00,0x00,0x00,0x00,0x01,0xE2,0x1C,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
    0x80,0x40,0x20,0x10,0x0C,0x03,0x00,0x00,0x00,0x03,0x0C,0x30,0x40,0x80,0x80,0x00,/*"入",2*/
    
    0x00,0x00,0xFF,0x00,0x00,0x00,0xFE,0x82,0x82,0x82,0x82,0x82,0x82,0xFE,0x00,0x00,
    0x00,0x00,0xFF,0x00,0x00,0x00,0x7F,0x20,0x20,0x20,0x20,0x20,0x20,0x7F,0x00,0x00,/*"旧",3*/
    
    0x10,0x8C,0x44,0x04,0xE4,0x04,0x95,0xA6,0x44,0x24,0x14,0x84,0x44,0x94,0x0C,0x00,
    0x02,0x02,0x7A,0x41,0x41,0x43,0x42,0x7E,0x42,0x42,0x42,0x43,0xF8,0x00,0x00,0x00,/*"密",4*/
    
    0x04,0x84,0xE4,0x5C,0x44,0xC4,0x00,0x02,0xF2,0x82,0x82,0x82,0xFE,0x80,0x80,0x00,
    0x02,0x01,0x7F,0x10,0x10,0x3F,0x00,0x08,0x08,0x08,0x08,0x48,0x88,0x40,0x3F,0x00,/*"码",5*/
};

//请输入新密码
const unsigned char chinese_enter_newPassword[][32] = {
    0x40,0x42,0xCC,0x00,0x00,0x44,0x54,0x54,0x54,0x7F,0x54,0x54,0x54,0x44,0x40,0x00,
    0x00,0x00,0x7F,0x20,0x10,0x00,0xFF,0x15,0x15,0x15,0x55,0x95,0x7F,0x00,0x00,0x00,/*"请",0*/
    0x88,0x68,0x1F,0xC8,0x08,0x10,0xC8,0x54,0x52,0xD1,0x12,0x94,0x08,0xD0,0x10,0x00,
    0x09,0x19,0x09,0xFF,0x05,0x00,0xFF,0x12,0x92,0xFF,0x00,0x5F,0x80,0x7F,0x00,0x00,/*"输",1*/
    0x00,0x00,0x00,0x00,0x00,0x01,0xE2,0x1C,0xE0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
    0x80,0x40,0x20,0x10,0x0C,0x03,0x00,0x00,0x00,0x03,0x0C,0x30,0x40,0x80,0x80,0x00,/*"入",2*/
    0x40,0x44,0x54,0x65,0xC6,0x64,0x54,0x44,0x00,0xFC,0x44,0x44,0xC4,0x42,0x40,0x00,
    0x20,0x12,0x4A,0x82,0x7F,0x02,0x0A,0x92,0x60,0x1F,0x00,0x00,0xFF,0x00,0x00,0x00,/*"新",3*/
    0x10,0x8C,0x44,0x04,0xE4,0x04,0x95,0xA6,0x44,0x24,0x14,0x84,0x44,0x94,0x0C,0x00,
    0x02,0x02,0x7A,0x41,0x41,0x43,0x42,0x7E,0x42,0x42,0x42,0x43,0xF8,0x00,0x00,0x00,/*"密",4*/
    0x04,0x84,0xE4,0x5C,0x44,0xC4,0x00,0x02,0xF2,0x82,0x82,0x82,0xFE,0x80,0x80,0x00,
    0x02,0x01,0x7F,0x10,0x10,0x3F,0x00,0x08,0x08,0x08,0x08,0x48,0x88,0x40,0x3F,0x00,/*"码",5*/
};
//密码修改成功
const unsigned char modify_passWord_complete[][32] = {
   0x10,0x8C,0x44,0x04,0xE4,0x04,0x95,0xA6,0x44,0x24,0x14,0x84,0x44,0x94,0x0C,0x00,
    0x02,0x02,0x7A,0x41,0x41,0x43,0x42,0x7E,0x42,0x42,0x42,0x43,0xF8,0x00,0x00,0x00,/*"密",0*/
    0x04,0x84,0xE4,0x5C,0x44,0xC4,0x00,0x02,0xF2,0x82,0x82,0x82,0xFE,0x80,0x80,0x00,
    0x02,0x01,0x7F,0x10,0x10,0x3F,0x00,0x08,0x08,0x08,0x08,0x48,0x88,0x40,0x3F,0x00,/*"码",1*/
    0x40,0x20,0xF8,0x07,0xF0,0xA0,0x90,0x4C,0x57,0x24,0xA4,0x54,0x4C,0x80,0x80,0x00,
    0x00,0x00,0xFF,0x00,0x1F,0x80,0x92,0x52,0x49,0x29,0x24,0x12,0x08,0x00,0x00,0x00,/*"修",2*/
    0x04,0x84,0x84,0x84,0x84,0xFC,0x40,0x30,0xCC,0x0B,0x08,0x08,0xF8,0x08,0x08,0x00,
    0x00,0x7F,0x20,0x10,0x10,0x08,0x80,0x40,0x21,0x16,0x08,0x16,0x21,0x40,0x80,0x00,/*"改",3*/
    0x00,0x00,0xF8,0x88,0x88,0x88,0x88,0x08,0x08,0xFF,0x08,0x09,0x0A,0xC8,0x08,0x00,
    0x80,0x60,0x1F,0x00,0x10,0x20,0x1F,0x80,0x40,0x21,0x16,0x18,0x26,0x41,0xF8,0x00,/*"成",4*/
    0x08,0x08,0x08,0xF8,0x08,0x08,0x08,0x10,0x10,0xFF,0x10,0x10,0x10,0xF0,0x00,0x00,
    0x10,0x30,0x10,0x1F,0x08,0x88,0x48,0x30,0x0E,0x01,0x40,0x80,0x40,0x3F,0x00,0x00,/*"功",5*/ 
};
//请设定密码
const unsigned char set_passWord[][32] = {
    0x40,0x42,0xCC,0x00,0x00,0x44,0x54,0x54,0x54,0x7F,0x54,0x54,0x54,0x44,0x40,0x00,
    0x00,0x00,0x7F,0x20,0x10,0x00,0xFF,0x15,0x15,0x15,0x55,0x95,0x7F,0x00,0x00,0x00,/*"请",0*/
    0x40,0x40,0x42,0xCC,0x00,0x40,0xA0,0x9E,0x82,0x82,0x82,0x9E,0xA0,0x20,0x20,0x00,
    0x00,0x00,0x00,0x3F,0x90,0x88,0x40,0x43,0x2C,0x10,0x28,0x46,0x41,0x80,0x80,0x00,/*"设",1*/
    0x10,0x0C,0x44,0x44,0x44,0x44,0x45,0xC6,0x44,0x44,0x44,0x44,0x44,0x14,0x0C,0x00,
    0x80,0x40,0x20,0x1E,0x20,0x40,0x40,0x7F,0x44,0x44,0x44,0x44,0x44,0x40,0x40,0x00,/*"定",2*/
    0x10,0x8C,0x44,0x04,0xE4,0x04,0x95,0xA6,0x44,0x24,0x14,0x84,0x44,0x94,0x0C,0x00,
    0x02,0x02,0x7A,0x41,0x41,0x43,0x42,0x7E,0x42,0x42,0x42,0x43,0xF8,0x00,0x00,0x00,/*"密",3*/
    0x04,0x84,0xE4,0x5C,0x44,0xC4,0x00,0x02,0xF2,0x82,0x82,0x82,0xFE,0x80,0x80,0x00,
    0x02,0x01,0x7F,0x10,0x10,0x3F,0x00,0x08,0x08,0x08,0x08,0x48,0x88,0x40,0x3F,0x00,/*"码",4*/
};

BEEP (蜂鸣器)

beep.c文件代码

#include "stm32f1xx.h"
#include "beep.h"

//初始化GPIO口
void beep_init(void){
    //打开时钟
    __HAL_RCC_GPIOC_CLK_ENABLE();
    //打开GPIO口
    GPIO_InitTypeDef GPIO_Initstruct;
    GPIO_Initstruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_Initstruct.Pin = GPIO_PIN_13;
    GPIO_Initstruct.Pull = GPIO_NOPULL;
    GPIO_Initstruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOC,&GPIO_Initstruct);
    //关闭蜂鸣器
    beep_off();
}
//打开蜂鸣器函数
void beep_on(void){
    HAL_GPIO_WritePin(GPIOC,GPIO_PIN_13,GPIO_PIN_RESET);
}
//关闭蜂鸣器
void beep_off(void){
    HAL_GPIO_WritePin(GPIOC,GPIO_PIN_13,GPIO_PIN_SET);
}
//反转蜂鸣器
void beep_toggle(void){
    HAL_GPIO_TogglePin(GPIOC,GPIO_PIN_13);  
}

SWITCH（开关）

switch.h文件代码

#include "alarm.h"
#include "stm32f1xx.h"                  // 外设的驱动函数


//初始化GPIO口

void alarm_init(void){
    
    //打开时钟
    __HAL_RCC_GPIOB_CLK_ENABLE();
    //调用GPIO的初始化函数
    GPIO_InitTypeDef GPIO_Initstruct;
    GPIO_Initstruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_Initstruct.Pin = GPIO_PIN_7;
    GPIO_Initstruct.Pull = GPIO_PULLUP;
    GPIO_Initstruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOB, &GPIO_Initstruct);
    //关闭继电器
    alarm_off();
}
//接通继电器的函数
void alarm_on(void){   
    
    HAL_GPIO_WritePin(GPIOB,GPIO_PIN_7,GPIO_PIN_RESET);   
}

//断开继电器的函数
void alarm_off(void){
    
    HAL_GPIO_WritePin(GPIOB,GPIO_PIN_7,GPIO_PIN_SET);
    
}

//获取继电器的状态
uint8_t alarm_status_get(void){
    
    return (uint8_t)HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_7);
}

W25Q128(FLASH存储器)

w25q128.c文件代码

#include "w25q128.h"

SPI_HandleTypeDef spi_handle = {0};
void w25q128_spi_init(void){
    
    spi_handle.Instance = SPI1;
    spi_handle.Init.Mode = SPI_MODE_MASTER;    //配置成主模式还是从模式
    spi_handle.Init.Direction = SPI_DIRECTION_2LINES;                 //配置全双工还是半双工
    spi_handle.Init.DataSize = SPI_DATASIZE_8BIT;      //数据的长度：8bit
    spi_handle.Init.CLKPolarity = SPI_POLARITY_LOW;      //CPOL = 0
    spi_handle.Init.CLKPhase = SPI_PHASE_1EDGE;          //CPHA = 奇数边沿检测
    spi_handle.Init.NSS = SPI_NSS_SOFT;               //软件控制SS引脚配置
    spi_handle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;    //波特率分频 ：256
    spi_handle.Init.FirstBit = SPI_FIRSTBIT_MSB;             //高位先行还是低位先行：高位先行
  
    //下面这三个先不需要考虑
    spi_handle.Init.TIMode = SPI_TIMODE_DISABLE;
    spi_handle.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
    spi_handle.Init.CRCPolynomial = 7;
    
    HAL_SPI_Init(&spi_handle);
}


void HAL_SPI_MspInit(SPI_HandleTypeDef *hspi){
    if(hspi->Instance == SPI1){
        __HAL_RCC_GPIOA_CLK_ENABLE();
        __HAL_RCC_SPI1_CLK_ENABLE();
        
        GPIO_InitTypeDef gpio_initstruct;
        
        //NSS引脚
        gpio_initstruct.Pin = GPIO_PIN_4;
        gpio_initstruct.Mode = GPIO_MODE_OUTPUT_PP;
        gpio_initstruct.Pull = GPIO_PULLUP;
        gpio_initstruct.Speed  = GPIO_SPEED_FREQ_HIGH;
        HAL_GPIO_Init(GPIOA,&gpio_initstruct);
        
        //SCL引脚和输出引脚
        gpio_initstruct.Pin = GPIO_PIN_5 |GPIO_PIN_7;
        gpio_initstruct.Mode = GPIO_MODE_AF_PP;
        HAL_GPIO_Init(GPIOA,&gpio_initstruct);
        
        //输入引脚
        gpio_initstruct.Pin = GPIO_PIN_6;
        gpio_initstruct.Mode = GPIO_MODE_INPUT;
        HAL_GPIO_Init(GPIOA,&gpio_initstruct);
        
    } 
}

uint8_t w25q128_spi_swap_byte(uint8_t data){
    
    uint8_t recv_data = 0;
    HAL_SPI_TransmitReceive(&spi_handle,&data, &recv_data,1,1000);  ///size:尺寸代表是多少个字节
    return recv_data;
}

//初始化w25q128模块
void w25q128_init(void){
    w25q128_spi_init();
}

//测试：读ID
uint16_t w25q128_read_id(void){
    uint16_t device_id = 0;
    
    W25Q128_CS(0);
    
    w25q128_spi_swap_byte(FLASH_ManufactDeviceID);
    w25q128_spi_swap_byte(0x00);
    w25q128_spi_swap_byte(0x00);
    w25q128_spi_swap_byte(0x00);
    
    device_id = w25q128_spi_swap_byte(FLASH_DummyBtye) << 8;  /* 将数据放在高8位 */
    device_id |= w25q128_spi_swap_byte(FLASH_DummyBtye);      /* 利用 |= 将数据放在低8位，并保留高8位的数据 */
    
    W25Q128_CS(1);
    
    return device_id; 
}

//写使能

void w25q128_write_enable(void)
{
    W25Q128_CS(0);
    w25q128_spi_swap_byte(FLASH_WriteEable);
    W25Q128_CS(1);
}

//读SR1寄存器
uint8_t w25q128_read_sr1(void){
    
    uint8_t recv_data = 0;
    W25Q128_CS(0);
    w25q128_spi_swap_byte(FLASH_ReadStatusReg1);
    recv_data = w25q128_spi_swap_byte(FLASH_DummyBtye);
    W25Q128_CS(1);
    return recv_data;
}

//发送地址的函数
void w25q128_send_address(uint32_t address){   //地址是3个字节，先发送高位，在发送中位，最后发送低位
    
    w25q128_spi_swap_byte(address >> 16);//高位
    w25q128_spi_swap_byte(address >> 8);  //中位：由于函数是一个8位的，因此，移动后数据后，高位自动去掉。
    w25q128_spi_swap_byte(address);
}

//忙等待的函数
void w25q128_wait_busy(void){
    
    while ((w25q128_read_sr1() & 0x01) == 0x01);  //判断最后一位是不是1
}

//读数据
void w25q128_read_data(uint32_t address,uint8_t *data,uint32_t size){
    
    uint32_t i = 0;
    
    W25Q128_CS(0);
    w25q128_spi_swap_byte(FLASH_ReadDate);
    w25q128_send_address(address);
    
    for(i = 0;i< size; i++)
       data[i] =  w25q128_spi_swap_byte(FLASH_DummyBtye);
    W25Q128_CS(1);
    
}
//页写:写的是256个字节，
void w25q128_write_page(uint32_t address,uint8_t *data,uint16_t size){   //代表的是字节数量
    
    uint16_t i = 0;
    
    w25q128_write_enable();
    W25Q128_CS(0);
    w25q128_spi_swap_byte(FLASH_PageProgram);
    w25q128_send_address(address);
    
    for(i = 0;i < size; i++)
       w25q128_spi_swap_byte(data[i]);
    W25Q128_CS(1);
    
    //忙等待，写入数据是需要花费时间的；看状态寄存器的最后一位是0还是1
    w25q128_wait_busy();
}
//扇区擦除
void w25q128_erase_sector(uint32_t address){
    w25q128_write_enable();
    w25q128_wait_busy();
    W25Q128_CS(0);
    w25q128_spi_swap_byte(FLASH_SectorErase);
    w25q128_send_address(address);
    W25Q128_CS(1);
    w25q128_wait_busy();
}
//如何指定变量的数据类型是多少

w25q128.h文件代码

#ifndef __W25Q128_H__
#define __W25Q128_H__
#include "stm32f1xx.h"

#define W25Q128_CS(x)  do{x ? \
                            HAL_GPIO_WritePin(GPIOA,GPIO_PIN_4,GPIO_PIN_SET): \
                            HAL_GPIO_WritePin(GPIOA,GPIO_PIN_4,GPIO_PIN_RESET);\
                       }while(0)

/* 指令表 */
#define FLASH_ManufactDeviceID          0x90
#define FLASH_WriteEable                0x06
#define FLASH_ReadStatusReg1            0x05
#define FLASH_ReadDate                  0x03
#define FLASH_PageProgram               0x02
#define FLASH_SectorErase               0x20
#define FLASH_DummyBtye                 0xFF                       

void w25q128_init(void);
uint16_t w25q128_read_id(void);
void w25q128_read_data(uint32_t address,uint8_t *data,uint32_t size);
void w25q128_write_page(uint32_t address,uint8_t *data,uint16_t size);
void w25q128_erase_sector(uint32_t address);                       
#endif

输入设备

KEYBOARD（矩阵键盘）

keyboard.c文件代码：

#include "keyboard.h"
#include "delay.h"

static uint8_t key_value;

void keyboard_init(void){
    
    //打开时钟
    __HAL_RCC_GPIOB_CLK_ENABLE();
    //调用GPIO的初始化函数
    GPIO_InitTypeDef GPIO_Initstruct;
    
    GPIO_Initstruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_10;
    GPIO_Initstruct.Mode = GPIO_MODE_IT_FALLING;
    GPIO_Initstruct.Pull = GPIO_PULLUP;
    GPIO_Initstruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOB, &GPIO_Initstruct);
    
    GPIO_Initstruct.Pin = GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14;
    GPIO_Initstruct.Mode = GPIO_MODE_INPUT;
    GPIO_Initstruct.Pull = GPIO_PULLDOWN;    //配置成下拉模式，当导通时，会变成高电平
    GPIO_Initstruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOB, &GPIO_Initstruct); 
    
    HAL_NVIC_SetPriority(EXTI0_IRQn,2,2);
    HAL_NVIC_EnableIRQ(EXTI0_IRQn);
    
    HAL_NVIC_SetPriority(EXTI1_IRQn,2,2);
    HAL_NVIC_EnableIRQ(EXTI1_IRQn);
    
    HAL_NVIC_SetPriority(EXTI2_IRQn,2,2);
    HAL_NVIC_EnableIRQ(EXTI2_IRQn);
    
    HAL_NVIC_SetPriority(EXTI15_10_IRQn,2,2);
    HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
    
}

void EXTI0_IRQHandler(void){
    
    HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_0);
    
}

void EXTI1_IRQHandler(void){
    
    HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_1);
    
}
void EXTI2_IRQHandler(void){
    
    HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_2); 
}
void EXTI15_10_IRQHandler(void){
    
    HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_10);
    
}

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){
    uint8_t row = 0,column = 0;
    if(key_value != 0) return;    //防止手速过快，只读取第一次按下时的按键值
    
    //确定行
    if(GPIO_Pin == GPIO_PIN_0)
        row  = 0x10;
    else if(GPIO_Pin == GPIO_PIN_1)
        row = 0x20;
    else if(GPIO_Pin == GPIO_PIN_2)
        row = 0x30;
    else if(GPIO_Pin == GPIO_PIN_10)
        row = 0x40;
    
    //确定列
    if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_11) == GPIO_PIN_SET){
        delay_ms(10);
        while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_11) == GPIO_PIN_SET);
        column = 0x01;
    }
    else if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_12) == GPIO_PIN_SET){
        delay_ms(10);
        while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_12) == GPIO_PIN_SET);
        column = 0x02;
    }
     else if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_13) == GPIO_PIN_SET){
        delay_ms(10);
        while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_13) == GPIO_PIN_SET);
        column = 0x03;
    }
     else if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_14) == GPIO_PIN_SET){
        delay_ms(10);
        while(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_14) == GPIO_PIN_SET);
        column = 0x04;
    }
     
    if(row != 0 && column != 0)
        key_value = row | column;    //按位与进行拼接
}

uint8_t keyboard_get_value(void){
    uint8_t ch = 0;
    if(key_value != 0)
    {
        if(key_value == 0x11) ch = '1';
        else if(key_value == 0x12) ch = '2';
        else if(key_value == 0x13) ch = '3';
        else if(key_value == 0x14) ch = 'A';
        
        else if(key_value == 0x21) ch = '4';
        else if(key_value == 0x22) ch = '5';
        else if(key_value == 0x23) ch = '6';
        else if(key_value == 0x24) ch = 'B';
        
        else if(key_value == 0x31) ch = '7';
        else if(key_value == 0x32) ch = '8';
        else if(key_value == 0x33) ch = '9';
        else if(key_value == 0x34) ch = 'C';
        
        else if(key_value == 0x41) ch = '*';
        else if(key_value == 0x42) ch = '0';
        else if(key_value == 0x43) ch = '#';
        else if(key_value == 0x44) ch = 'D';
        delay_ms(400);
        key_value = 0x00;
    }
    return ch;
}

PASSWORD（配置密码）

password.c文件代码：

#include "password.h"
#include "w25q128.h"
#include "oled.h"
#include "keyboard.h"
#include "string.h"
#include "stdio.h"
#include "alarm.h"
#include "beep.h"
#include "delay.h"

#define PASSWORD_SIZE       10


uint8_t pwd_input[PASSWORD_SIZE] = {0};
uint8_t pwd_read[PASSWORD_SIZE] = {0};
uint8_t i = 0,key_value = 0,try_times = 0;

                    /********** 1 *********/

//初始化函数
void password_init(void){
    w25q128_init();   
}
//读取密码：读取的是w25Q128_read_data();

//保存密码
void password_save(void){
    w25q128_erase_sector(0x000000);
    w25q128_write_page(0x000000,pwd_input,PASSWORD_SIZE);
    oled_modif_pwd_complete();
}
//清空输入缓存
void password_input_clear(void){
    memset(pwd_input, 0 ,PASSWORD_SIZE);
    i = 0;
}

//获取键盘输入:将按键输入(数字、字母)存到一个字符串数组当中，而“#”，“*”则进行返回。
uint8_t password_get_input(void){
   password_input_clear();                                  /*清除 字符数组 中的值 */
    
   while(1){
      key_value =  keyboard_get_value();
       if(key_value == '#'){
           printf("按下了 %c 键 \r\n", key_value);
           return POUND_KEY;
       }
       else if(key_value == '*'){
           printf("按下了 %c 键 \r\n", key_value);
           return STAR_KEY;
       }
       else if(key_value != 0){
           printf("按下了 %c 键 \r\n", key_value);
           oled_show_char(3,i * 10,key_value,16);  //字符的尺寸。
           pwd_input[i++] = key_value;
       }
   }
    
}
                    /********** 2 *********/
//密码比对:长度和元素。返回值：TURE和FLASE
uint8_t password_compare(void){
    uint8_t i = 0;
    w25q128_read_data(0x000000,pwd_read,PASSWORD_SIZE);
    //先检查两个字符串的长度
    if(strlen((char *)pwd_input) != strlen((char *)pwd_read))
        return FALSE;
    for (i = 0;i < strlen((char *)pwd_read); i++){
        if(pwd_input[i] != pwd_read[i])
            return FALSE;
    }
    return TRUE;
}

//密码输入正确的操作
void password_input_right_action(void){
    oled_pwd_right();
    alarm_on();
    beep_on();
    delay_ms(500);
    beep_off();
    delay_s(1);
    alarm_off();
    try_times = 0;
    
}
//密码输入错误的操作
void password_input_error_action(void){
    oled_pwd_error();
    try_times ++;
    if(try_times >= 3){
        beep_on();
        delay_ms(1000);
        beep_off();
        try_times = 0;
    }
    delay_s(1);
}

//旧密码输入正确的操作
void password_old_right_action(void){
    oled_input_new_pwd();
    password_get_input();
    password_save();
    beep_on();
    delay_ms(300);
    beep_off();
    delay_ms(700);
}

//旧密码输入错误的操作
void password_old_error_action(void){
    oled_pwd_error();
    delay_ms(1000);
}

//检查密码是否存在
void password_check(void){
    w25q128_read_data(0x000000,pwd_read,PASSWORD_SIZE);
    printf("读出密码：%s\r\n",pwd_read);
    if(pwd_read[0] == '\0' || pwd_read[0] == 0xFF){
        oled_set_pwd();
        password_get_input();
        password_save();
    }
}

password.h文件代码

#ifndef __PASSWORD_H__
#define __PASSWPRD_H__
#include "stm32f1xx.h"

#define FALSE               0
#define TRUE                1

#define POUND_KEY   '#'
#define STAR_KEY    '*'

void password_init(void);

void password_check(void);
void password_save(void);
uint8_t password_get_input(void);
uint8_t password_compare(void);

void password_input_right_action(void);
void password_input_error_action(void);

void password_old_right_action(void);
void password_old_error_action(void);


#endif

主函数

main.c文件代码：

#include "sys.h"
#include "led.h"
#include "delay.h"
#include "uart1.h"
#include "oled.h"
#include "beep.h"
#include "alarm.h"
#include "w25q128.h"
#include "keyboard.h"
#include "password.h"


int main(void)
{
    HAL_Init();                         /* 初始化HAL库 */
    stm32_clock_init(RCC_PLL_MUL9);     /* 设置时钟, 72Mhz */
    uart1_init(115200);
    printf("hello,world!!!\r\n");
    
    beep_init();
    alarm_init();
    oled_init();
    keyboard_init();
    password_init();
//    w25q128_init();
    
    password_check();
    uint8_t key_last = 0;
    while(1)
    { 
       oled_show_input();
       key_last = password_get_input();
       if(key_last == POUND_KEY){
           if(password_compare() == TRUE)
               password_input_right_action();
           else
               password_input_error_action();
       }
       else if(key_last == STAR_KEY){
           oled_input_old_pwd();
           password_get_input();
           if(password_compare() == TRUE)
               password_old_right_action();
           else
               password_old_error_action();
       }
    }
}