基于STM32的密码锁设计
学习记录
按键密码锁,开锁时,按下键盘上的开锁按键后,利用键盘上的数字键0-9输入密码,每按下一个数字键后在显示器上显示一个数字,当密码输入完成时,按下确认键,如果输入的密码正确, LCD显示“YES”,电子密码锁被打开,如果密码不正确,LCD显示屏会显示“NO”,电子密码锁不能打开。通过LCD显示屏,可以清楚地判断出密码锁所处的状态。
原理图:
部分代码:
#include "main.h"
#include "lcd1602.h"
#include "timer.h"
#include "key4x4.h"
#include "beep.h"void SystemClock_Config(void);uint8_t flag = 0;uint8_t password[6] = {1, 4, 7, 2, 5, 8};uint8_t disp_num[6] = {27, 27, 27, 27, 27, 27};uint8_t disp_num_tmp[6];#define DISP_FORMAT "%d%d%d%d%d%d"char *Disp_YES = " YES! ";
char *Disp_NO = " NO! ";
char *Disp_NONE = " ";char *toDisplay;int main(void)
{uint8_t Key_Value = 27;uint8_t i = 0;/* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* Configure the system clock */SystemClock_Config();TIM3_Init(2400-1, 72-1); // 10msBeep_Init();Key_Init();LCD_Init();LCD_write_string(0, 0, "Input Password:");while(1){ Key_Value = Key_Scan();if(Key_Value < 10){disp_num[i] = Key_Value;i++;if(i > 5)i = 0;Key_Value = 27;} if(Key_Value == 16){ for(i = 0; i < 6; i++){if(disp_num[i] != password[i]){flag = 1;break;}else{flag = 0;}}if(flag == 1){LCD_write_string(6, 1, Disp_NO);LED_Blink (3, 200); BEEP_Blink(3, 200); LCD_write_string(6, 1, Disp_NONE);}else {LCD_write_string(6, 1, Disp_YES);LED_Blink (1, 500); BEEP_Blink(1, 500); LCD_write_string(6, 1, Disp_NONE);}memset(disp_num, 27, 6);Key_Value = 27;i = 0; }if(Key_Value == 13){memset(disp_num, 27, 6);Key_Value = 27;i = 0; }
设计报告:
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