【AT-START-F403A测评】之 4、二维码扫描测试

lmyyz · 发表于2020-10-12 16:15

【AT-START-F403A测评】之 4、二维码扫描测试 [复制链接]

本帖最后由 lmyyz 于 2020-10-12 16:19 编辑

我们先看一下原厂给的演示例程，main主函数：

int main(void)
{	
  
  static u8 bartype=0; 
  u8 result[1024]={0} ;
  u8 result_compare[1024]={0} ;
  u8 Play_times = 0 ;
  AT32_Board_Init();	
  NVIC_Configuration();
  UART_Print_Init(115200);	 			
  KEY_And_LED_Crl_Init();
  EXTIX_Init();
  //sensor clock
  Clock_Output_Config();  //24Mhz
  LCD_SPI1_Init(); 
  LCD_Init();			   	 
  LCD_display_initial_info();
  //camera spi 
  BF3901_SPI_Init(); 		
  BF3901_SCCB_Init();				
  SCCB_WR_Reg(0x12,0x80);
  while(BF3901_Init())//3?ê??ˉBF3901
  {
    LCD_ShowString(5,70,200,16,16,"BF3901 Error!!");
    Delay_ms(200);
  }	
  LCD_ShowString(5,70,200,16,16,"BF3901 Init OK");
  printf("1SRAM IN:%d\r\n",my_mem_perused(SRAMIN));
  Artery_QR_init();
  printf("2SRAM IN:%d\r\n",my_mem_perused(SRAMIN)); 
  LCD_ShowString(5,120,200,20,16,"Please push the USER key to test QR decode!!");
  //USB configure 
  AT32_USB_GPIO_init();       //USB GPIO configure
  Delay_ms(500);
  USB_Interrupts_Config();    //Enable USB Interrut
  Set_USBClock(0);            //Set USB Clock, USB Clock must 48MHz
  USB_Init();                 //USB protocol and register initialize
  while(Key_run != 0x55); //
  Key_run = 0x22;
  DMA_SPIx_Enable();
  Delay_ms(500);
  LCD_Clear(WHITE);
  BlockWrite((lcddev.width-LCD_WIDTH)/2,(lcddev.width+LCD_WIDTH)/2-1,(lcddev.height-LCD_HEIGHT)/2,(lcddev.height+LCD_HEIGHT)/2-1); // 240*320
  EXTI14_Init();
  while(1)
  {	
   camera_refresh();//
    //run ATK_QR
    while(Get_Frame == 1)
    {    
      Artery_QR__decode(240,240,bmp,bartype,result);
      if(result[0]==0)
      {
        #if defined(Only_detect_QR)
        printf("Not detect !  ");
          bartype=0; 
          Get_Frame = 0;
        #elif defined(Detect_all)
        bartype++;  ?
        if(bartype>=5)
        {
          printf("Not detect !  ");
          bartype=0; 
          Get_Frame = 0;
        }
        #endif
        if(Key_run == 0x55)
        {
          LCD_Clear(WHITE);
          BlockWrite((lcddev.width-LCD_WIDTH)/2,(lcddev.width+LCD_WIDTH)/2-1,(lcddev.height-LCD_HEIGHT)/2,(lcddev.height+LCD_HEIGHT)/2-1); // 240*320
          Delay_sec(2);
          Key_run = 0x22;
        }
      }
      else if(result[0]!=0)//ê?±e3?à′á?￡???ê??á1?
      {	
        //?ì·??ù?÷
        GPIO_SetBits(GPIOE, GPIO_Pins_15);
        Delay_ms(600);Delay_ms(600);
        GPIO_ResetBits(GPIOE, GPIO_Pins_15);
        if(Buffercmp(result_compare,result,sizeof(result)) == 1)
        {
          Play_times++;
        }else{
          Play_times=1;
        }
        // Dispaly data to LCD 
        LCD_Clear(WHITE);
        LCD_ShowString(5,10,200,16,16,"The times:");
        LCD_ShowNum(130,10,Play_times,2,16);
        LCD_ShowString(5,30,200,16,16,"The result :");
        LCD_ShowString(5,50,200,100,16,result);
        LCD_ShowString(5,190,200,20,16,"Please push the USER key to test QR decode!!");
        printf("\r\nresult:\r\n%s\r\n",result);
        // Transmit data to USB 
        usb_printf("The times:%d\r\n",Play_times);
        usb_printf("The result :\r\n");        
        recvLen = strlen((const char*)result);
        sendLen = CDC_Send_DATA(result, recvLen);
        usb_printf("\r\n\r\n");
        
        AT32_LEDn_Toggle(LED3);
        memcpy(result_compare,result,sizeof(result));
        Key_run = 0x66;
        if(Key_run != 0x66)
        {
          Delay_sec(3);
          LCD_Clear(WHITE);
          BlockWrite((lcddev.width-LCD_WIDTH)/2,(lcddev.width+LCD_WIDTH)/2-1,(lcddev.height-LCD_HEIGHT)/2,(lcddev.height+LCD_HEIGHT)/2-1); // 240*320
        }
        Get_Frame = 0;
      }        
    }
    if(Key_run == 0x11)
    {
      Get_Frame = 0;
      Line_Refresh_Flg = RX_IDLE_FLG; 
      Delay_sec(3);
      LCD_Clear(WHITE);
      BlockWrite((lcddev.width-LCD_WIDTH)/2,(lcddev.width+LCD_WIDTH)/2-1,(lcddev.height-LCD_HEIGHT)/2,(lcddev.height+LCD_HEIGHT)/2-1); // 240*320
      Delay_sec(2);
      Key_run = 0x22;
    }
  }	   
}

总结一下：显示初始化IO口，lcd接口，摄像头BF3901接口，（吐槽一下，把摄像头换成OV的难道不香么，到现在BF3901的PDF资料我都没找到）。

初始化结束后按一下按键正式进入二维码扫描功能。流程如下：摄像头一直扫描图像，一边扫描一遍显示在lcd屏上，扫描完一帧（这里设置的是240*240像素）后开始处理图像信息，通过二维码识别.lib返回最终的结果，不成功的话继续扫描。接下来我们一起看看二维码识别的效果怎么样！

=================================================

华丽的分割线

=================================================

让我们来看一下扫描效果：果然扫描成功了自动扫描二维码.mp4 (965.23 KB, 下载次数: 6)