STM32+二维码扫描模块（QR_Scaner）实现门禁系统

这里使用的是SMT32F103RCT6核心板

二维码扫描模块使用的是窜口通信，可以使用USB转TTL配合微信小程序（二维码生成器）生成二维码，模块RXD，TXD一定要跟TTL的RXD，TXD反接，使用窜口调休助手就可以观察二维码扫描模块的的效果

STM32搭配二模块扫描模块实现门禁

二维码启动C文件

#include <string.h>
#include "QR_Scaner.h"
#include "usart.h"
#include "systick.h"

uint8_t       TmpBuf[1];
uint8_t       QRScanerRxBuf[1024];
__IO uint32_t   QR_Scaner_RxIdx = 0;

uint8_t complete_flag = 0;

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
   if(huart->Instance == USART2)
   {
       if(TmpBuf[0] != 0x00)
           QRScanerRxBuf[QR_Scaner_RxIdx++] = TmpBuf[0];

       //HAL_UART_Transmit(&huart1, (uint8_t *)TmpBuf, 1, 0xffff);

       if(QR_Scaner_RxIdx >= sizeof(QRScanerRxBuf))
       {
           memset(QRScanerRxBuf, 0x00, sizeof(QRScanerRxBuf));
           QR_Scaner_RxIdx = 0;
           printf("QRScanerRxBuf 已满\r\n");
       }

       HAL_UART_Receive_IT(&huart2, TmpBuf, 1);
   }
}

char multip_scaner_cmd[] = "AT+SCAN=0\r\n"; //全速扫码
char single_scaner_cmd[] = "AT+SCAN=1\r\n"; //单次扫码

int scan_mode_set(uint8_t mode)
{
   memset(QRScanerRxBuf, 0x00, sizeof(QRScanerRxBuf));
   QR_Scaner_RxIdx = 0;

   switch(mode)
   {
       case 0:
           HAL_UART_Transmit(&huart2, (uint8_t *)multip_scaner_cmd, strlen(multip_scaner_cmd), 100);
           break;
       case 1:
           HAL_UART_Transmit(&huart2, (uint8_t *)single_scaner_cmd, strlen(single_scaner_cmd), 100);
           break;
       default:
           return -1;
   }

   delayms(20);

   if(strstr((char *)QRScanerRxBuf, "[AT]OK\r\n"))
   {
       return 0;
   }
   else
   {
       return -1;
   }
}

#define QR_SCANER_RESET_RETURN "OK! - [QBoard][A very outstanding Bar Code Scanner]\r\n"

#define PASS_WORD "1234567890" // 默认的门禁密码，修改成自己的密码，也就是二维码的内容。

void QR_Door_Control(void)
{
   uint32_t tick_start = 0;

   printf("---欢迎使用二维码门禁系统---\r\n");

   memset(QRScanerRxBuf, 0x00, sizeof(QRScanerRxBuf));
   QR_Scaner_RxIdx = 0;

   // 启动串口接收
   HAL_UART_Receive_IT(&huart2, TmpBuf, 1);

   // 等待二维码扫描模块启动
   tick_start = get_systicks();
   while(1)
   {
       if(QR_Scaner_RxIdx==0)
       {
           printf("\r\n .二维码扫描模块已启动...\r\n");
           break;
       }
       if(query_time(tick_start, 5000))
       {
           goto exit;
       }
   }
   printf("\r\n .已进入扫码识别模式，请扫码开门--->\r\n");

   memset(QRScanerRxBuf, 0x00, sizeof(QRScanerRxBuf));
   QR_Scaner_RxIdx = 0;
   while(1)
   {
       if(QR_Scaner_RxIdx==0)
       {
           /* 等待数据收完 */
           delayms(100);

           /* 对比收到的数据和密码 */
           if(strcmp((char *)QRScanerRxBuf, PASS_WORD"\r\n") == 0)
           {
               //printf("密码是:%s", (char *)QRScanerRxBuf);
               printf("\r\n .门禁密码正确 <---\r\n");
               delayms(1000);
           }
           else
           {
               printf("\r\n .门禁密码错误!\r\n");
               delayms(1000);
           }

           // 门已关闭，重新开始扫码开门
           if(scan_mode_set(1) != 0)
           {
               printf("设置单次扫码模式失败2\r\n");
               break;
           }

           memset(QRScanerRxBuf, 0x00, sizeof(QRScanerRxBuf));
           QR_Scaner_RxIdx = 0;
       }
   }

exit:

   printf("进入扫码识别模式失败，请检查硬件连接。\r\n");
   printf("QRScanerRxBuf:%s", QRScanerRxBuf);
}

#ifndef __QR_SCANER_H__
#define __QR_SCANER_H__

void QR_Door_Control(void);

#endif

主函数

int main(void)
{
/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/* MCU Configuration----------------------------------------------------------*/

/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();

/* USER CODE BEGIN Init */

/* USER CODE END Init */

/* Configure the system clock */
SystemClock_Config();

/* USER CODE BEGIN SysInit */

/* USER CODE END SysInit */

/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_USART2_UART_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */

QR_Door_Control();
LED_Control();
/* USER CODE END 2 */

/* Infinite loop */
/* USER CODE BEGIN WHILE */
printf("rest\n");
while (1)
{
LED_R_ON;
/* USER CODE END WHILE */

/* USER CODE BEGIN 3 */

}
/* USER CODE END 3 */

}