自学教程：C++ BSP_IO_ITClear函数代码示例

/**  * @brief  EXTI line detection callbacks.  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){  static JOYState_TypeDef JoyState = JOY_NONE;    if(GPIO_Pin == GPIO_PIN_2)  {        /* Get the Joystick State */    JoyState = BSP_JOY_GetState();        MSC_DEMO_ProbeKey(JoyState);         switch(JoyState)    {    case JOY_LEFT:      LCD_LOG_ScrollBack();      break;               case JOY_RIGHT:      LCD_LOG_ScrollForward();      break;                    default:      break;               }    /* Clear joystick interrupt pending bits */    BSP_IO_ITClear(JOY_ALL_PINS);  }}

/**  * @brief  This function notify user about link status changement.  * @param  netif: the network interface  * @retval None  */void ethernetif_notify_conn_changed(struct netif *netif){  struct ip_addr ipaddr;  struct ip_addr netmask;  struct ip_addr gw;    if(netif_is_link_up(netif))  {    IP4_ADDR(&ipaddr, IP_ADDR0, IP_ADDR1, IP_ADDR2, IP_ADDR3);    IP4_ADDR(&netmask, NETMASK_ADDR0, NETMASK_ADDR1 , NETMASK_ADDR2, NETMASK_ADDR3);    IP4_ADDR(&gw, GW_ADDR0, GW_ADDR1, GW_ADDR2, GW_ADDR3);            netif_set_addr(netif, &ipaddr , &netmask, &gw);        /* When the netif is fully configured this function must be called.*/    netif_set_up(netif);              BSP_LED_Off(LED2);    BSP_LED_On(LED1);      }  else  {        /*  When the netif link is down this function must be called.*/    netif_set_down(netif);        BSP_LED_Off(LED1);    BSP_LED_On(LED2);     }    /* Clear IO Expander Interrupt flag */  BSP_IO_ITClear();}

/**  * @brief  EXTI line detection callbacks.  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){    __IO JOYState_TypeDef JoyState = JOY_NONE;    if(GPIO_Pin == GPIO_PIN_8)  {        /* Get the Joystick State */    JoyState = BSP_JOY_GetState();        HID_DEMO_ProbeKey(JoyState);         switch(JoyState)    {    case JOY_LEFT:      LCD_LOG_ScrollBack();      break;               case JOY_RIGHT:      LCD_LOG_ScrollForward();      break;                    default:      break;               }    /* Clear joystick interrupt pending bits */    BSP_IO_ITClear();    osSemaphoreRelease(MenuEvent);  }}

/**  * @brief  Clears all touch screen interrupts.  * @param  None  * @retval None  */  void BSP_TS_ITClear(void){  /* Clear all IO IT pin */  BSP_IO_ITClear();    /* Clear TS IT pending bits */  TsDrv->ClearIT(TS_I2C_ADDRESS); }

/**  * @brief  EXTI line detection callbacks  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){  /* Get the IT status register value */  if(BSP_IO_ITGetStatus(MII_INT_PIN))  {    ethernetif_set_link(&gnetif);  }  BSP_IO_ITClear();}

/** @brief  SD detect IT treatment.  * @param  None  * @retval None  */void BSP_SD_DetectIT(void){  /* Clear all pending bits */  BSP_IO_ITClear();    /* To re-enable IT */  BSP_SD_ITConfig();    /* SD detect IT callback */  BSP_SD_DetectCallback();}

/**  * @brief  EXTI line detection callbacks  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){  if (GPIO_Pin == MFX_IRQOUT_PIN)  {    /* Get the IT status register value */    if(BSP_IO_ITGetStatus(MII_INT_PIN))    {      /* ethernetif_notify_conn_changed(&gnetif);; */    }    BSP_IO_ITClear();  }}

/**  * @brief EXTI line detection callbacks  * @param GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){    if (GPIO_Pin == MFX_IRQOUT_PIN)    {        /* Get the IT status register value */        if(BSP_IO_ITGetStatus(MII_INT_PIN))        {            osSemaphoreRelease(Netif_LinkSemaphore);        }        BSP_IO_ITClear();    }}

/**  * @brief  EXTI line detection callbacks.  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){  if(BSP_IO_ITGetStatus(JOY_SEL_PIN) != 0)  {    /* SEL is used to pause and resume the audio playback */    if (PressCount == 1)    {      /* Resume playing Wave status */      PauseResumeStatus = RESUME_STATUS;      PressCount = 0;    }    else    {      /* Pause playing Wave status */      PauseResumeStatus = PAUSE_STATUS;      PressCount = 1;    }  }  else if(BSP_IO_ITGetStatus(JOY_UP_PIN) != 0)  {    /* UP is used to increment the volume of the audio playback */    volume ++;    if (volume > 100)    {      volume = 100;    }    VolumeChange = 1;  }  else if(BSP_IO_ITGetStatus(JOY_DOWN_PIN) != 0)  {    /* DOWN is used to decrement the volume of the audio playback */    volume --;    if ((int8_t)volume < 50)    {      volume = 50;    }    VolumeChange = 1;  }  else if(BSP_IO_ITGetStatus(JOY_RIGHT_PIN) != 0)  {    /* Audio change output: speaker only */    UserOutputMode = OUTPUT_DEVICE_SPEAKER;  }  else if(BSP_IO_ITGetStatus(JOY_LEFT_PIN) != 0)  {    /* Audio change output: headset only */    UserOutputMode = OUTPUT_DEVICE_HEADPHONE;  }  /* Clear IO Expander IT */  BSP_IO_ITClear(JOY_ALL_PINS);}

/**  * @brief  Joystick Exti demo  * @param  None  * @retval None  */void Joystick_exti_demo (void){  uint8_t status = 0;  uint32_t ITstatus = 0;  Joystick_SetHint(1);  status = BSP_JOY_Init(JOY_MODE_EXTI);  if (status != IO_OK)  {    BSP_LCD_SetBackColor(LCD_COLOR_WHITE);    BSP_LCD_SetTextColor(LCD_COLOR_RED);    BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize()- 95, (uint8_t *)"ERROR", CENTER_MODE);    BSP_LCD_DisplayStringAt(0, BSP_LCD_GetYSize()- 80, (uint8_t *)"Joystick cannot be initialized", CENTER_MODE);  }  if (status == IO_OK)  {    Joystick_SetCursorPosition();  }	  while (1)  /* pull for USER button in GPIO mode */  {    if (status == IO_OK)    {      if (MfxExtiReceived == 1)      {        MfxExtiReceived = 0;        ITstatus = BSP_IO_ITGetStatus(JOY_ALL_PINS);        if (ITstatus)        {          /* Get the Joystick State */          JoyState = BSP_JOY_GetState();          Joystick_SetCursorPosition();        }        BSP_IO_ITClear();        /* poll if joystick is still pressed until it is released*/        while ( BSP_JOY_GetState() != JOY_NONE)        {          Joystick_SetCursorPosition();          HAL_Delay(5);        }      }    }    if(CheckForUserInput() > 0)    {      return;    }    HAL_Delay(5);  }}

/*** @brief  Main program* @param  None* @retval None*/int main(void){      /* STM32F4xx HAL library initialization:       - Configure the Flash prefetch, instruction and Data caches       - Configure the Systick to generate an interrupt each 1 msec       - Set NVIC Group Priority to 4       - Global MSP (MCU Support Package) initialization     */  HAL_Init();    /* Configure the system clock to 180 MHz */  SystemClock_Config();    /* Configure LED1 and LED3 */  BSP_LED_Init(LED1);  BSP_LED_Init(LED3);  /* Configure Key Button */  BSP_PB_Init(BUTTON_TAMPER, BUTTON_MODE_EXTI);    /* Configure Joystick using MFX in IT mode in order to wakeup system after standby */  BSP_JOY_Init(JOY_MODE_EXTI);  /* RTC configuration */  RTC_Config();    /* Turn on LED1 */  BSP_LED_On(LED1);  /* Enable WKUP pin */  HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);  /* Infinite loop */  while (1)  {    if (AuthorizeToggle)    {      /* Toggle LED1 */      BSP_LED_Toggle(LED1);      AuthorizeToggle = 0;    }    if (MfxExtiReceived)    {      /* Clear MFX IT */      BSP_IO_ITClear();      MfxExtiReceived = 0;    }  }}

/**  * @brief  EXTI line detection callbacks.  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){  /* If the interruption comes from the Joystick, check which     Joystick button has been pressed */  JoyState = BSP_JOY_GetState();  if(JoyState == JOY_SEL)   {    /* SEL is used to pause and resume the audio playback */    if (PressCount == 1)    {      /* Resume playing Wave status */      PauseResumeStatus = RESUME_STATUS;      PressCount = 0;    }    else    {      /* Pause playing Wave status */      PauseResumeStatus = PAUSE_STATUS;      PressCount = 1;    }  }  else if(JoyState == JOY_UP)  {    /* UP is used to increment the volume of the audio playback */    volume ++;    if (volume > 100)    {      volume = 100;    }    VolumeChange = 1;  }  else if(JoyState == JOY_DOWN)  {    /* DOWN is used to decrement the volume of the audio playback */    volume --;    if ((int8_t)volume < 50)    {      volume = 50;    }    VolumeChange = 1;  }  /* Clear MFX IT */  BSP_IO_ITClear();}

/**  * @brief EXTI line detection callbacks  * @param GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){    if (GPIO_Pin == GPIO_PIN_8)  {    /* Get the IT status register value */    if(BSP_IO_ITGetStatus(MII_INT_PIN))    {      ethernetif_set_link(&gnetif);    }    BSP_IO_ITClear();  }  else if (GPIO_Pin == GPIO_PIN_13)  {     /*connect to tcp server */      udp_echoclient_send();  }}

/**  * @brief  This function notify user about link status changement.  * @param  netif: the network interface  * @retval None  */void ethernetif_notify_conn_changed(struct netif *netif){  struct ip_addr ipaddr;  struct ip_addr netmask;  struct ip_addr gw;  if(netif_is_link_up(netif))  {    /* IP address setting */    IP4_ADDR(&ipaddr, ip_address[3], ip_address[2], ip_address[1], ip_address[0]);    IP4_ADDR(&netmask, sn_mask[3], sn_mask[2] , sn_mask[1], sn_mask[0]);    IP4_ADDR(&gw, gw_address[3], gw_address[2], gw_address[1], gw_address[0]);        netif_set_addr(netif, &ipaddr , &netmask, &gw);        /* When the netif is fully configured this function must be called.*/    netif_set_up(netif);        _VNCServer_Notify(NOTIFY_SERVER_NETIF_UP);    /* If DHCP: re-start process */    if (_DHCPClinet_TCB != 0)    {      /* Update DHCP state machine */      DHCP_state = DHCP_START;    }  }  else  {       /*  When the netif link is down this function must be called.*/    netif_set_down(netif);        _VNCServer_Notify(NOTIFY_SERVER_NETIF_DOWN);        /* If DHCP: stop process */    if (_DHCPClinet_TCB != 0)    {      /* Update DHCP state machine */      DHCP_state = DHCP_LINK_DOWN;    }  }  /* Clear IO Expander Interrupt flag */  BSP_IO_ITClear();}

/**  * @brief  SD Demo exti detection  * @param  None  * @retval None  */void SD_exti_demo (void){   uint32_t ITstatus = 0;  SD_main_test();  if(BSP_SD_IsDetected() != SD_PRESENT)  {        BSP_SD_Init();        BSP_LCD_SetTextColor(LCD_COLOR_RED);        BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30, (uint8_t *)"SD Not Connected", LEFT_MODE);  }  else   {      BSP_LCD_SetTextColor(LCD_COLOR_GREEN);      BSP_LCD_DisplayStringAt(20, BSP_LCD_GetYSize()-30,   (uint8_t *)"SD Connected    ", LEFT_MODE);  }  BSP_SD_ITConfig();  while (1)  {    if (MfxExtiReceived == 1)    {      MfxExtiReceived = 0;      ITstatus = BSP_IO_ITGetStatus(SD_DETECT_PIN);      if (ITstatus)      {        SD_Detection();      }      BSP_IO_ITClear();      }        if(CheckForUserInput() > 0)    {      BSP_SD_DeInit();      return;    }  }}

/**  * @brief  EXTI line detection callbacks.  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){  static JOYState_TypeDef JoyState = JOY_NONE;    if(GPIO_Pin == MFX_IRQOUT_PIN)  {        /* The different functionalities of MFX (TS, Joystick, SD detection, etc. )      can be configured in exti mode to generate an IRQ on given events.    The MFX IRQ_OUT pin is unique and common to all functionalities, so if several     functionalities are configured in exit mode, the MCU has to enquire MFX about      the IRQ source (see BSP_IO_ITGetStatus). Communication with Mfx is done by I2C.     Often the sw requires ISRs (irq service routines) to be quick while communication     with I2C can be considered relatively long (hundreds of usec depending on I2C clk).     Considering that the features for human interaction like TS, Joystick, SD detection     don’t need immediate reaction, it is suggested to use POLLING instead of EXTI mode,     in order to avoid "blocking I2C communication" on interrupt service routines */    /* Get the Joystick State */    JoyState = BSP_JOY_GetState();    HAL_Delay(200);        MSC_DEMO_ProbeKey(JoyState);         switch(JoyState)    {    case JOY_LEFT:      LCD_LOG_ScrollBack();      break;               case JOY_RIGHT:      LCD_LOG_ScrollForward();      break;                    default:      break;               }    /* Clear joystick interrupt pending bits */    BSP_IO_ITClear();  }}

/**  * @brief  EXTI line detection callbacks.  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){    __IO JOYState_TypeDef JoyState = JOY_NONE;    if(GPIO_Pin == MFX_IRQOUT_PIN)  {        /* The different functionalities of MFX (TS, Joystick, SD detection, etc. )      can be configured in exti mode to generate an IRQ on given events.    The MFX IRQ_OUT pin is unique and common to all functionalities, so if several     functionalities are configured in exit mode, the MCU has to enquire MFX about      the IRQ source (see BSP_IO_ITGetStatus). Communication with Mfx is done by I2C.     Often the sw requires ISRs (irq service routines) to be quick while communication     with I2C can be considered relatively long (hundreds of usec depending on I2C clk).     In order to avoid to use "blocking I2C communication" on interrupt service routines     it's suggested (as alternative to this implementation) to use dedicated semaphore*/    /* Get the Joystick State */    JoyState = BSP_JOY_GetState();        HID_DEMO_ProbeKey(JoyState);         switch(JoyState)    {    case JOY_LEFT:      LCD_LOG_ScrollBack();      break;               case JOY_RIGHT:      LCD_LOG_ScrollForward();      break;                    default:      break;               }    /* Clear joystick interrupt pending bits */    BSP_IO_ITClear();    osSemaphoreRelease(MenuEvent);  }}

/**  * @brief  User task  * @param  pvParameters not used  * @retval None  */static void MSC_MenuThread(void const *argument){  uint32_t ITstatus = 0;  for(;;)  {    if(osSemaphoreWait(MenuEvent, 100) == osOK)    {      switch(msc_demo.state)      {      case MSC_DEMO_IDLE:        MSC_SelectItem(MSC_main_menu, 0);         msc_demo.state = MSC_DEMO_WAIT;        msc_demo.select = 0;        osSemaphoreRelease(MenuEvent);        break;                  case MSC_DEMO_WAIT:        MSC_SelectItem(MSC_main_menu, msc_demo.select & 0x7F);                /* Handle select item */        if(msc_demo.select & 0x80)        {          switch(msc_demo.select & 0x7F)          {          case 0:            msc_demo.state = MSC_DEMO_FILE_OPERATIONS;             osSemaphoreRelease(MenuEvent);            break;                      case 1:            msc_demo.state = MSC_DEMO_EXPLORER;              osSemaphoreRelease(MenuEvent);            break;                      case 2:            msc_demo.state = MSC_REENUMERATE;             osSemaphoreRelease(MenuEvent);            break;                      default:            break;          }        }        break;              case MSC_DEMO_FILE_OPERATIONS:          /* Read and Write File Here */        if(Appli_state == APPLICATION_READY)        {          MSC_File_Operations();        }        msc_demo.state = MSC_DEMO_WAIT;        break;               case MSC_DEMO_EXPLORER:        /* Display disk content */        if(Appli_state == APPLICATION_READY)        {                  Explore_Disk("0:/", 1);        }        msc_demo.state = MSC_DEMO_WAIT;        break;               case MSC_REENUMERATE:        /* Force MSC Device to re-enumerate */        USBH_ReEnumerate(&hUSBHost);         msc_demo.state = MSC_DEMO_WAIT;        break;              default:        break;      }       msc_demo.select &= 0x7F;    }    if (osJoySemaphore != NULL)    {            if(osSemaphoreWait(osJoySemaphore , 0) == osOK)      {        ITstatus = BSP_IO_ITGetStatus(JOY_ALL_PINS);        if (ITstatus)        {          Joystick_MscMenu();          /* Clear joystick interrupt pending bits */          BSP_IO_ITClear();        }      }    }  }}

/**  * @brief  EXTI line detection callbacks.  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){  static JOYState_TypeDef JoyState = JOY_NONE;  static uint32_t debounce_time = 0;    if(GPIO_Pin == GPIO_PIN_8)  {        /* Get the Joystick State */    JoyState = BSP_JOY_GetState();    HAL_Delay(200);        /* Clear joystick interrupt pending bits */    BSP_IO_ITClear();        if(Appli_state == APPLICATION_MSC)    {      MSC_DEMO_ProbeKey(JoyState);     }    else if(Appli_state == APPLICATION_HID)    {      HID_DEMO_ProbeKey(JoyState);     }    else if(Appli_state == APPLICATION_AUDIO)    {      if(audio_select_mode == AUDIO_SELECT_MENU)      {          AUDIO_MenuProbeKey(JoyState);       }      else if(audio_select_mode == AUDIO_PLAYBACK_CONTROL)      {        AUDIO_PlaybackProbeKey(JoyState);      }    }    switch(JoyState)    {    case JOY_LEFT:      LCD_LOG_ScrollBack();      break;               case JOY_RIGHT:      LCD_LOG_ScrollForward();      break;                    default:      break;               }  }    if(audio_demo.state == AUDIO_DEMO_PLAYBACK)  {    if(GPIO_Pin == KEY_BUTTON_PIN)    {       /* Prevent debounce effect for user key */      if((HAL_GetTick() - debounce_time) > 50)      {        debounce_time = HAL_GetTick();      }      else      {        return;      }            /* Change the selection type */      if(audio_select_mode == AUDIO_SELECT_MENU)      {        Audio_ChangeSelectMode(AUDIO_PLAYBACK_CONTROL);       }      else if(audio_select_mode == AUDIO_PLAYBACK_CONTROL)      {               Audio_ChangeSelectMode(AUDIO_SELECT_MENU);      }    }  }} 

/**  * @brief  EXTI line detection callbacks.  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){  static JOYState_TypeDef JoyState = JOY_NONE;  static uint32_t debounce_time = 0;  if(GPIO_Pin == GPIO_PIN_8)  {        /* Get the Joystick State */    JoyState = BSP_JOY_GetState();        CDC_DEMO_ProbeKey(JoyState);         /* Clear joystick interrupt pending bits */    BSP_IO_ITClear();        if((CdcSelectMode == CDC_SELECT_MENU) && (CdcDemo.state != CDC_DEMO_RECEIVE))    {      switch(JoyState)      {      case JOY_LEFT:        LCD_LOG_ScrollBack();        break;                   case JOY_RIGHT:        LCD_LOG_ScrollForward();        break;                        default:        break;                 }    }  }    if(CdcDemo.state == CDC_DEMO_CONFIGURATION)  {    if(GPIO_Pin == KEY_BUTTON_PIN)    {        /* Prevent debounce effect for user key */      if((HAL_GetTick() - debounce_time) > 50)      {        debounce_time = HAL_GetTick();      }      else      {        return;      }        BSP_LCD_SetBackColor(LCD_COLOR_BLACK);       /* Change the selection type */      if(CdcSelectMode == CDC_SELECT_MENU)      {        CDC_ChangeSelectMode(CDC_SELECT_CONFIG);       }      else if(CdcSelectMode == CDC_SELECT_CONFIG)      {        CDC_ChangeSelectMode(CDC_SELECT_MENU);      }            else if(CdcSelectMode == CDC_SELECT_FILE)      {        CDC_ChangeSelectMode(CDC_SELECT_FILE);      }    }  }    if(CdcDemo.state == CDC_DEMO_SEND)  {    if(GPIO_Pin == KEY_BUTTON_PIN)    {       /* Prevent debounce effect for user key */      if((HAL_GetTick() - debounce_time) > 50)      {        debounce_time = HAL_GetTick();      }      else      {        return;      }              if(CdcDemo.Send_state == CDC_SEND_SELECT_FILE)      {        BSP_LCD_SetBackColor(LCD_COLOR_BLACK);           /* Change the selection type */        if(CdcSelectMode == CDC_SELECT_MENU)        {          CDC_ChangeSelectMode(CDC_SELECT_FILE);         }        else if(CdcSelectMode == CDC_SELECT_FILE)        {          LCD_ClearTextZone();              LCD_LOG_UpdateDisplay();          CDC_ChangeSelectMode(CDC_SELECT_MENU);          CdcDemo.Send_state = CDC_SEND_WAIT;        }      }    }//.........这里部分代码省略.........

/**  * @brief EXTI line detection callbacks  * @param GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){  uint32_t ITstatus = 0;  JOYState_TypeDef JoyState = JOY_NONE;  if(GPIO_Pin == TAMPER_BUTTON_PIN)  {    /* Toggle GREEN LED1 */    BSP_LED_Toggle(LED1);    DestinationAddress = MyFollowerAddress1;    TxSize    = 0x0; /* no payload, ping only */    StartSending = 1;  }  if(GPIO_Pin == MFX_IRQOUT_PIN)  /* Interrupt received from MFX */  {    /* The different functionalities of MFX (TS, Joystick, SD detection, etc. )      can be configured in exti mode to generate an IRQ on given events.    The MFX IRQ_OUT pin is unique and common to all functionalities, so if several     functionalities are configured in exit mode, the MCU has to enquire MFX about      the IRQ source (see BSP_IO_ITGetStatus). Communication with Mfx is done by I2C.     Often the sw requires ISRs (irq service routines) to be quick while communication     with I2C can be considered relatively long (hundreds of usec depending on I2C clk).     Considering that the features for human interaction like TS, Joystick, SD detection     don’t need immediate reaction, it is suggested to use POLLING instead of EXTI mode,     in order to avoid "blocking I2C communication" on interrupt service routines */	    ITstatus = BSP_IO_ITGetStatus(JOY_ALL_PINS);    if (ITstatus)                 /* Checks if interrupt comes from joystick */    {      /* Get the Joystick State */      JoyState = BSP_JOY_GetState();      if(JoyState == JOY_UP)      {        /* Toggle RED LED3 */        BSP_LED_Toggle(LED3);      }	        if(JoyState == JOY_DOWN)      {        /* Toggle BLUE LED4 */        BSP_LED_Toggle(LED4);#if defined (DEVICE_1)        DestinationAddress = MyFollowerAddress2;#elif defined (DEVICE_2)        DestinationAddress = MyFollowerAddress1;#endif /* DEVICE_1 */             TxSize    = 0x0; /* no payload, ping only */        StartSending = 1;      }	        if(JoyState == JOY_SEL)      {        /* Toggle ORANGE LED2 */        BSP_LED_Toggle(LED2);        DestinationAddress = 0xF;  /* broadcast message indicator */        TxSize    = 0x0;           /* no payload, ping only */        StartSending = 1;      }    }    BSP_IO_ITClear();  }} 

/**  * @brief  EXTI line detection callbacks.  * @param  GPIO_Pin: Specifies the pins connected EXTI line  * @retval None  */void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin){  static JOYState_TypeDef JoyState = JOY_NONE;  static uint32_t debounce_time = 0;    if(GPIO_Pin == GPIO_PIN_2)  {        /* Get the Joystick State */    JoyState = BSP_JOY_GetState();        /* Clear joystick interrupt pending bits */    BSP_IO_ITClear(JOY_ALL_PINS);        if(mtp_select_mode == MTP_SELECT_MENU)    {        MTP_MenuProbeKey(JoyState);             switch(JoyState)      {      case JOY_LEFT:        LCD_LOG_ScrollBack();        break;                   case JOY_RIGHT:        LCD_LOG_ScrollForward();        break;                        default:        break;                 }    }    else if(mtp_select_mode == MTP_PLAYBACK_CONTROL)    {      AUDIO_PlaybackProbeKey(JoyState);    }  }  if(mtp_demo.state == MTP_DEMO_PLAYBACK)  {    if(GPIO_Pin == KEY_BUTTON_PIN)    {       /* Prevent debounce effect for user key */      if((HAL_GetTick() - debounce_time) > 50)      {        debounce_time = HAL_GetTick();      }      else      {        return;      }            /* Change the selection type */      if(mtp_select_mode == MTP_SELECT_MENU)      {        MTP_ChangeSelectMode(MTP_PLAYBACK_CONTROL);       }      else if(mtp_select_mode == MTP_PLAYBACK_CONTROL)      {              AUDIO_Stop();      }    }  }}

//.........这里部分代码省略.........    test_result |= IOE_GPIO_TEST_FAILED;  }  HAL_GPIO_WritePin(MCU_GPIO_PORT, MCU_GPIO_PIN, GPIO_PIN_RESET);  HAL_Delay(1);  ioe_gpio_status = BSP_IO_ReadPin (MFX_CONNECTET_PIN);  if (ioe_gpio_status)   {    test_result |= IOE_GPIO_TEST_FAILED;  }  else  {    test_result |= IOE_GPIO_TEST_PASSED;  }  lcd_line += 15;  if (test_result)   {    BSP_LCD_DisplayStringAt(20, lcd_line, (uint8_t *)"IOE IO_MODE_INPUT: FAILED", LEFT_MODE);  }  else  {    BSP_LCD_DisplayStringAt(20, lcd_line, (uint8_t *)"IOE IO_MODE_INPUT: PASSED", LEFT_MODE);    all_test_fail = 0;  }  SetMcuGpioToBeConnectedToMfxGPI();		  /* TEST IO_MODE_IT_HIGH_LEVEL mode */  /* ---------------------------------- */  test_result = IOE_GPIO_TEST_PASSED;  BSP_IO_ConfigPin(MFX_CONNECTET_PIN, IO_MODE_OFF);  HAL_GPIO_WritePin(MCU_GPIO_PORT, MCU_GPIO_PIN, GPIO_PIN_RESET);  BSP_IO_ITClear();     /* BSP_IO_ConfigPin(MFXIO_PIN_6, IO_MODE_INPUT); */  BSP_IO_ConfigPin(MFX_CONNECTET_PIN, IO_MODE_IT_HIGH_LEVEL_PD);  /* We just want to test the good functioning of pending bit and ack on the IOE */  HAL_NVIC_DisableIRQ((IRQn_Type)(MFX_IRQOUT_EXTI_IRQn));  ioe_irq_pending_status = BSP_IO_ITGetStatus(MFX_CONNECTET_PIN);  if (ioe_irq_pending_status)   {    BSP_IO_ITClear();       test_result |= IOE_GPIO_TEST_FAILED;  }  else  {    test_result |= IOE_GPIO_TEST_PASSED;  }  HAL_GPIO_WritePin(MCU_GPIO_PORT, MCU_GPIO_PIN, GPIO_PIN_SET);  ioe_irq_pending_status = BSP_IO_ITGetStatus(MFX_CONNECTET_PIN);  if (ioe_irq_pending_status)   {    BSP_IO_ITClear();       test_result |= IOE_GPIO_TEST_PASSED;  }  else  {    test_result |= IOE_GPIO_TEST_FAILED;  }  HAL_Delay(1);  ioe_irq_pending_status = BSP_IO_ITGetStatus(MFX_CONNECTET_PIN);  HAL_GPIO_WritePin(MCU_GPIO_PORT, MCU_GPIO_PIN, GPIO_PIN_RESET);

//.........这里部分代码省略.........          AudioState = AUDIO_STATE_INIT;          if(AUDIO_PLAYER_Start(0) == AUDIO_ERROR_IO)          {            AUDIO_ChangeSelectMode(AUDIO_SELECT_MENU);             AudioDemo.state = AUDIO_DEMO_IDLE;          }          else          {            BSP_LCD_SetTextColor(LCD_COLOR_YELLOW);             BSP_LCD_DisplayStringAtLine(10, (uint8_t *)"[  UP   ] : Volume +");            BSP_LCD_DisplayStringAtLine(11, (uint8_t *)"[ DOWN  ] : Volume -");            BSP_LCD_DisplayStringAtLine(12, (uint8_t *)"[ LEFT  ] : Previous");            BSP_LCD_DisplayStringAtLine(13, (uint8_t *)"[ RIGHT ] : Next");            BSP_LCD_DisplayStringAtLine(14, (uint8_t *)"[  SEL  ] : Pause/Resume");            BSP_LCD_SetTextColor(LCD_COLOR_WHITE);                     }        }        else /* Not idle */        {          if(AUDIO_PLAYER_Process() == AUDIO_ERROR_IO)          {            AUDIO_ChangeSelectMode(AUDIO_SELECT_MENU);              AudioDemo.state = AUDIO_DEMO_IDLE;          }        }      }      else      {        AudioDemo.state = AUDIO_DEMO_WAIT;      }      break;           case AUDIO_DEMO_IN:      if(appli_state == APPLICATION_READY)      {        if(AudioState == AUDIO_STATE_IDLE)        {          /* Start Playing */          AudioState = AUDIO_STATE_INIT;          /* Configure the audio recorder: sampling frequency, bits-depth, number of channels */          if(AUDIO_REC_Start() == AUDIO_ERROR_IO)          {            AUDIO_ChangeSelectMode(AUDIO_SELECT_MENU);             AudioDemo.state = AUDIO_DEMO_IDLE;          }          else          {            BSP_LCD_SetTextColor(LCD_COLOR_YELLOW);             BSP_LCD_DisplayStringAtLine(11, (uint8_t *)"[  UP   ] : Volume +");            BSP_LCD_DisplayStringAtLine(12, (uint8_t *)"[ DOWN  ] : Volume -");            BSP_LCD_DisplayStringAtLine(13, (uint8_t *)"[  SEL  ] : Pause/Resume");            BSP_LCD_SetTextColor(LCD_COLOR_WHITE);           }        }        else /* Not idle */        {          status = AUDIO_REC_Process();          if((status == AUDIO_ERROR_IO) || (status == AUDIO_ERROR_EOF))          {            AUDIO_ChangeSelectMode(AUDIO_SELECT_MENU);              AudioDemo.state = AUDIO_DEMO_IDLE;          }        }      }      else      {        AudioDemo.state = AUDIO_DEMO_WAIT;      }      break;          default:      break;    }  }  if(appli_state == APPLICATION_DISCONNECT)  {    appli_state = APPLICATION_IDLE;         AUDIO_ChangeSelectMode(AUDIO_SELECT_MENU);     BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);      }  AudioDemo.select &= 0x7F;  if (MfxIrqReceived == 1)  {      MfxIrqReceived = 0;      ITstatus = BSP_IO_ITGetStatus(JOY_ALL_PINS);      if (ITstatus)      {        /* Prevent debounce effect for user key */        if((HAL_GetTick() - debounce_time) > 200)        {          debounce_time = HAL_GetTick();          Joystick_AudioMenu();        }        /* Clear joystick interrupt pending bits */        BSP_IO_ITClear();      }  }}