Esempio n. 1
0
__interrupt
#endif
static void usb_general_interrupt(void)

#endif
{
#ifdef FREERTOS_USED
  portBASE_TYPE task_woken = pdFALSE;
#endif
#if USB_HOST_FEATURE == true && USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE
  U8 i;
#endif

// ---------- DEVICE/HOST events management ------------------------------------
#if USB_DEVICE_FEATURE == true && USB_HOST_FEATURE == true
  // ID pin change detection
  if (Is_usb_id_transition() && Is_usb_id_interrupt_enabled())
  {
    g_usb_mode = (Is_usb_id_device()) ? USB_MODE_DEVICE : USB_MODE_HOST;
    Usb_ack_id_transition();
    if (g_usb_mode != g_old_usb_mode) // Basic debounce
    {
      // Previously in device mode, check if disconnection was detected
      if (g_old_usb_mode == USB_MODE_DEVICE)
      {
        if (usb_connected)
        {
          // Device mode disconnection actions
          usb_connected = false;
          usb_configuration_nb = 0;
          Usb_vbus_off_action();
        }
      }
      // Previously in host mode, check if disconnection was detected
      else if (Is_host_attached())
      {
        // Host mode disconnection actions
        device_state = DEVICE_UNATTACHED;
        Host_device_disconnection_action();
      }

      //LOG_STR(log_pin_id_changed);
      if (Is_usb_id_device() == USB_MODE_DEVICE) { LOG_STR(log_pin_id_changed_to_device); }
		else { LOG_STR(log_pin_id_changed_to_host); }
	  
	  Usb_send_event((Is_usb_device()) ? EVT_USB_DEVICE_FUNCTION :
                                         EVT_USB_HOST_FUNCTION);
      Usb_id_transition_action();

	  // Easier to recover from ID signal de-bounce and ID pin transitions by shutting down the USB and resetting state machine to re-init
#if ID_PIN_CHANGE_SHUTDOWN_USB == ENABLE
      Usb_disable();
      Usb_disable_otg_pad();

extern void UsbResetStateMachine(void);
	  UsbResetStateMachine();

    #ifdef FREERTOS_USED
      // Release the semaphore in order to start a new device/host task
      taskENTER_CRITICAL();
      xSemaphoreGiveFromISR(usb_tsk_semphr, &task_woken);
      taskEXIT_CRITICAL();
	#endif
#endif

#if ID_PIN_CHANGE_GENERATE_RESET == ENABLE
      Reset_CPU();
#endif
    }
  }
#endif  // End DEVICE/HOST FEATURE MODE

// ---------- DEVICE events management -----------------------------------------
#if USB_DEVICE_FEATURE == true
  #if USB_HOST_FEATURE == true
  // If both device and host features are enabled, check if device mode is engaged
  // (accessing the USB registers of a non-engaged mode, even with load operations,
  // may corrupt USB FIFO data).
  if (Is_usb_device())
  #endif
  {
    // VBus state detection
    if (Is_usb_vbus_transition() && Is_usb_vbus_interrupt_enabled())
    {
      Usb_ack_vbus_transition();
      if (Is_usb_vbus_high())
      {
        usb_start_device();
        Usb_send_event(EVT_USB_POWERED);
        Usb_vbus_on_action();
      }
      else
      {
        Usb_unfreeze_clock();
        Usb_detach();
        usb_connected = false;
        usb_configuration_nb = 0;
        Usb_send_event(EVT_USB_UNPOWERED);
        Usb_vbus_off_action();
  #ifdef FREERTOS_USED
        // Release the semaphore in order to start a new device/host task
        taskENTER_CRITICAL();
        xSemaphoreGiveFromISR(usb_tsk_semphr, &task_woken);
        taskEXIT_CRITICAL();
  #endif
      }
    }
    // Device Start-of-Frame received
    if (Is_usb_sof() && Is_usb_sof_interrupt_enabled())
    {
      Usb_ack_sof();
      Usb_sof_action();
    }
    // Device Suspend event (no more USB activity detected)
    if (Is_usb_suspend() && Is_usb_suspend_interrupt_enabled())
    {
      Usb_ack_suspend();
      Usb_enable_wake_up_interrupt();
      (void)Is_usb_wake_up_interrupt_enabled();
      Usb_freeze_clock();
      Usb_send_event(EVT_USB_SUSPEND);
      Usb_suspend_action();
    }
    // Wake-up event (USB activity detected): Used to resume
    if (Is_usb_wake_up() && Is_usb_wake_up_interrupt_enabled())
    {
      Usb_unfreeze_clock();
      (void)Is_usb_clock_frozen();
      Usb_ack_wake_up();
      Usb_disable_wake_up_interrupt();
      Usb_wake_up_action();
      Usb_send_event(EVT_USB_WAKE_UP);
    }
    // Resume state bus detection
    if (Is_usb_resume() && Is_usb_resume_interrupt_enabled())
    {
      Usb_disable_wake_up_interrupt();
      Usb_ack_resume();
      Usb_disable_resume_interrupt();
      Usb_resume_action();
      Usb_send_event(EVT_USB_RESUME);
    }
    // USB bus reset detection
    if (Is_usb_reset() && Is_usb_reset_interrupt_enabled())
    {
      Usb_ack_reset();
      usb_init_device();
      Usb_reset_action();
      Usb_send_event(EVT_USB_RESET);
    }
  }
#endif  // End DEVICE FEATURE MODE

// ---------- HOST events management -------------------------------------------
#if USB_HOST_FEATURE == true
  #if USB_DEVICE_FEATURE == true
  // If both device and host features are enabled, check if host mode is engaged
  // (accessing the USB registers of a non-engaged mode, even with load operations,
  // may corrupt USB FIFO data).
  else
  #endif
  {
    // The device has been disconnected
    if (Is_host_device_disconnection() && Is_host_device_disconnection_interrupt_enabled())
    {
      host_disable_all_pipes();
      Host_ack_device_disconnection();
  #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE
      reset_it_pipe_str();
  #endif
      device_state = DEVICE_UNATTACHED;
      LOG_STR(log_device_disconnected);
      Usb_send_event(EVT_HOST_DISCONNECTION);
      Host_device_disconnection_action();
  #ifdef FREERTOS_USED
      // Release the semaphore in order to start a new device/host task
      taskENTER_CRITICAL();
      xSemaphoreGiveFromISR(usb_tsk_semphr, &task_woken);
      taskEXIT_CRITICAL();
  #endif
    }
    // Device connection
    if (Is_host_device_connection() && Is_host_device_connection_interrupt_enabled())
    {
      Host_ack_device_connection();
      host_disable_all_pipes();
      Host_device_connection_action();
    }
    // Host Start-of-Frame has been sent
    if (Is_host_sof() && Is_host_sof_interrupt_enabled())
    {
      Host_ack_sof();
      Usb_send_event(EVT_HOST_SOF);
#if (USB_HIGH_SPEED_SUPPORT==true)
      if( Is_usb_full_speed_mode() )
      {
         private_sof_counter++;
      }else{
         private_sof_counter_HS++;
         if( 0 == (private_sof_counter_HS%8) )
         {
            private_sof_counter++;
         }
      }
#else
      private_sof_counter++;
#endif
      // Delay time-out management for interrupt transfer mode in host mode
  #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE && TIMEOUT_DELAY_ENABLE == ENABLE
      if (private_sof_counter >= 250) // Count 250 ms (SOF @ 1 ms)
      {
        private_sof_counter = 0;
        for (i = 0; i < MAX_PEP_NB; i++)
        {
          if (it_pipe_str[i].enable &&
              ++it_pipe_str[i].timeout > TIMEOUT_DELAY && Host_get_pipe_type(i) != TYPE_INTERRUPT)
          {
            it_pipe_str[i].enable = false;
            it_pipe_str[i].status = PIPE_DELAY_TIMEOUT;
            Host_reset_pipe(i);
            if (!is_any_interrupt_pipe_active() && !g_sav_int_sof_enable) // If no more transfer is armed
            {
              Host_disable_sof_interrupt();
            }
            it_pipe_str[i].handler(PIPE_DELAY_TIMEOUT, it_pipe_str[i].nb_byte_processed);
          }
        }
      }
  #endif
      Host_sof_action();
    }
    // Host Wake-up has been received
    if (Is_host_hwup() && Is_host_hwup_interrupt_enabled())
    {
      // CAUTION: HWUP can be cleared only when USB clock is active (not frozen)!
      //! @todo Implement this on the silicon version
      //Pll_start_auto();               // First Restart the PLL for USB operation
      //Wait_pll_ready();               // Make sure PLL is locked
      Usb_unfreeze_clock();           // Enable clock on USB interface
      (void)Is_usb_clock_frozen();    // Make sure USB interface clock is enabled
      Host_disable_hwup_interrupt();  // Wake-up interrupt should be disabled as host is now awoken!
      Host_ack_hwup();                // Clear HWUP interrupt flag
      Usb_send_event(EVT_HOST_HWUP);  // Send software event
      Host_hwup_action();             // Map custom action
    }
  #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE
    // Host pipe interrupts
    while ((i = Host_get_interrupt_pipe_number()) < MAX_PEP_NB) usb_pipe_interrupt(i);
  #endif
  }
#endif  // End HOST FEATURE MODE

#ifdef FREERTOS_USED
  return task_woken;
#endif
}
Esempio n. 2
0
ISR(usb_general_interrupt, AVR32_USBB_IRQ_GROUP, USB_INT_LEVEL)

#endif
{
#ifdef FREERTOS_USED
  portBASE_TYPE task_woken = pdFALSE;
#endif
  uint8_t i;
  /* avoid Cppcheck Warning */
  UNUSED(i);

// ---------- DEVICE/HOST events management ------------------------------------
#if USB_DEVICE_FEATURE == true && USB_HOST_FEATURE == true
  // ID pin change detection
  if (Is_usb_id_transition() && Is_usb_id_interrupt_enabled())
  {
    g_usb_mode = (Is_usb_id_device()) ? USB_MODE_DEVICE : USB_MODE_HOST;
    Usb_ack_id_transition();
    if (g_usb_mode != g_old_usb_mode) // Basic debounce
    {
      // Previously in device mode, check if disconnection was detected
      if (g_old_usb_mode == USB_MODE_DEVICE)
      {
        if (usb_connected)
        {
          // Device mode diconnection actions
          usb_connected = false;
          usb_configuration_nb = 0;
          Usb_vbus_off_action();
        }
      }
      // Previously in host mode, check if disconnection was detected
      else if (Is_host_attached())
      {
        // Host mode diconnection actions
        device_state = DEVICE_UNATTACHED;
        Host_device_disconnection_action();
      }
      LOG_STR(log_pin_id_changed);
      Usb_send_event((Is_usb_device()) ? EVT_USB_DEVICE_FUNCTION :
                                         EVT_USB_HOST_FUNCTION);
      Usb_id_transition_action();
      //! @todo ID pin hot state change!!!
      // Preliminary management: HARDWARE RESET!!!
  #if ID_PIN_CHANGE_GENERATE_RESET == ENABLE
      // Hot ID transition generates CPU reset
      Usb_disable();
      Usb_disable_otg_pad();
    #ifdef FREERTOS_USED
      // Release the semaphore in order to start a new device/host task
      taskENTER_CRITICAL();
      xSemaphoreGiveFromISR(usb_tsk_semphr, &task_woken);
      taskEXIT_CRITICAL();
    #else
#if defined(CPU_RESET_CALLBACK)
      CPU_RESET_CALLBACK();
#endif
      Reset_CPU();
    #endif
  #endif
      g_old_usb_mode = g_usb_mode;  // Store current USB mode, for mode change detection
    }
  }
#endif  // End DEVICE/HOST FEATURE MODE

// ---------- DEVICE events management -----------------------------------------
#if USB_DEVICE_FEATURE == true
  #if USB_HOST_FEATURE == true
  // If both device and host features are enabled, check if device mode is engaged
  // (accessing the USB registers of a non-engaged mode, even with load operations,
  // may corrupt USB FIFO data).
  if (Is_usb_device())
  #endif
  {
    // VBus state detection
    if (Is_usb_vbus_transition() && Is_usb_vbus_interrupt_enabled())
    {
      Usb_ack_vbus_transition();
      if (Is_usb_vbus_high())
      {
        usb_start_device();
        Usb_send_event(EVT_USB_POWERED);
        Usb_vbus_on_action();
      }
      else
      {
        Usb_unfreeze_clock();
        Usb_detach();
        usb_connected = false;
        usb_configuration_nb = 0;
        Usb_send_event(EVT_USB_UNPOWERED);
        Usb_vbus_off_action();
  #ifdef FREERTOS_USED
        // Release the semaphore in order to start a new device/host task
        taskENTER_CRITICAL();
        xSemaphoreGiveFromISR(usb_tsk_semphr, &task_woken);
        taskEXIT_CRITICAL();
  #endif
      }
    }
    // Device Start-of-Frame received
    if (Is_usb_sof() && Is_usb_sof_interrupt_enabled())
    {
      Usb_ack_sof();
      Usb_sof_action();
    }
    // Device Suspend event (no more USB activity detected)
    if (Is_usb_suspend() && Is_usb_suspend_interrupt_enabled())
    {
      Usb_ack_suspend();
      Usb_enable_wake_up_interrupt();
      (void)Is_usb_wake_up_interrupt_enabled();
      Usb_freeze_clock();
      Usb_send_event(EVT_USB_SUSPEND);
      Usb_suspend_action();
    }
    // Wake-up event (USB activity detected): Used to resume
    if (Is_usb_wake_up() && Is_usb_wake_up_interrupt_enabled())
    {
      Usb_unfreeze_clock();
      (void)Is_usb_clock_frozen();
      Usb_ack_wake_up();
      Usb_disable_wake_up_interrupt();
      Usb_wake_up_action();
      Usb_send_event(EVT_USB_WAKE_UP);
    }
    // Resume state bus detection
    if (Is_usb_resume() && Is_usb_resume_interrupt_enabled())
    {
      Usb_disable_wake_up_interrupt();
      Usb_ack_resume();
      Usb_disable_resume_interrupt();
      Usb_resume_action();
      Usb_send_event(EVT_USB_RESUME);
    }
    // USB bus reset detection
    if (Is_usb_reset() && Is_usb_reset_interrupt_enabled())
    {
      Usb_ack_reset();
      usb_init_device();
      Usb_reset_action();
      Usb_send_event(EVT_USB_RESET);
    }
  }
#endif  // End DEVICE FEATURE MODE

// ---------- HOST events management -------------------------------------------
#if USB_HOST_FEATURE == true
  #if USB_DEVICE_FEATURE == true
  // If both device and host features are enabled, check if host mode is engaged
  // (accessing the USB registers of a non-engaged mode, even with load operations,
  // may corrupt USB FIFO data).
  else
  #endif
  {
    // The device has been disconnected
    if (Is_host_device_disconnection() && Is_host_device_disconnection_interrupt_enabled())
    {
      host_disable_all_pipes();
      Host_ack_device_disconnection();
  #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE
      reset_it_pipe_str();
  #endif
  #ifdef HOST_VBUS_LOW_TIMEOUT
      cpu_set_timeout(HOST_VBUS_LOW_TIMEOUT, &timer_vbus_low);
      device_state = DEVICE_VBUS_LOW;
  #else
      device_state = DEVICE_UNATTACHED;
  #endif
      LOG_STR(log_device_disconnected);
      Usb_send_event(EVT_HOST_DISCONNECTION);
      Host_device_disconnection_action();
  #ifdef FREERTOS_USED
      // Release the semaphore in order to start a new device/host task
      taskENTER_CRITICAL();
      xSemaphoreGiveFromISR(usb_tsk_semphr, &task_woken);
      taskEXIT_CRITICAL();
  #endif
    }
    // Device connection
    if (Is_host_device_connection() && Is_host_device_connection_interrupt_enabled())
    {
      Host_ack_device_connection();
      host_disable_all_pipes();
      Usb_send_event(EVT_HOST_CONNECTION);
      Host_device_connection_action();
    }
    // Host Start-of-Frame has been sent
    if (Is_host_sof() && Is_host_sof_interrupt_enabled())
    {
      Host_ack_sof();
      Usb_send_event(EVT_HOST_SOF);
      private_sof_counter++;
      // Delay time-out management for interrupt tranfer mode in host mode
  #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE && TIMEOUT_DELAY_ENABLE == ENABLE
      if (private_sof_counter >= 250) // Count 250 ms (SOF @ 1 ms)
      {
        private_sof_counter = 0;
        for (i = 0; i < MAX_PEP_NB; i++)
        {
          if (it_pipe_str[i].enable &&
              ++it_pipe_str[i].timeout > TIMEOUT_DELAY && Host_get_pipe_type(i) != TYPE_INTERRUPT)
          {
            it_pipe_str[i].enable = false;
            it_pipe_str[i].status = PIPE_DELAY_TIMEOUT;
            Host_reset_pipe(i);
            if (!is_any_interrupt_pipe_active() && !g_sav_int_sof_enable) // If no more transfer is armed
            {
              Host_disable_sof_interrupt();
            }
            it_pipe_str[i].handler(PIPE_DELAY_TIMEOUT, it_pipe_str[i].nb_byte_processed);
          }
        }
      }
  #endif
      Host_sof_action();
    }
    // Host Wake-up has been received
    if (Is_host_hwup() && Is_host_hwup_interrupt_enabled())
    {
      // CAUTION: HWUP can be cleared only when USB clock is active (not frozen)!
      //! @todo Implement this on the silicon version
      //Pll_start_auto();               // First Restart the PLL for USB operation
      //Wait_pll_ready();               // Make sure PLL is locked
      Usb_unfreeze_clock();           // Enable clock on USB interface
      (void)Is_usb_clock_frozen();    // Make sure USB interface clock is enabled
      Host_disable_hwup_interrupt();  // Wake-up interrupt should be disabled as host is now awoken!
      Host_ack_hwup();                // Clear HWUP interrupt flag
      Usb_send_event(EVT_HOST_HWUP);  // Send software event
      Host_hwup_action();             // Map custom action
    }

    Host_int_action();

    while ((i = Host_get_interrupt_pipe_number()) < MAX_PEP_NB)
    {
      if (Is_host_in_received(i) && Is_host_in_received_interrupt_enabled(i))
      {
        Host_freeze_pipe(i);
        Host_disable_in_received_interrupt(i);
      }
    }

  #if defined(USB_HIGH_SPEED_SUPPORT) && USB_HIGH_SPEED_SUPPORT == true && \
    defined(PIPE_AUDIO_IN)
    // Workaround - freeze the IN audio pipe
    if (Is_host_in_received(PIPE_AUDIO_IN))
    {
      extern void workaround_freeze_iso_in(void);
      workaround_freeze_iso_in();
    }
  #endif // USB_HIGH_SPEED_SUPPORT == true

  #if USB_HOST_PIPE_INTERRUPT_TRANSFER == ENABLE
    // Host pipe interrupts
    while ((i = Host_get_interrupt_pipe_number()) < MAX_PEP_NB) usb_pipe_interrupt(i);
  #endif
  }
#endif  // End HOST FEATURE MODE

#ifdef FREERTOS_USED
  return task_woken;
#endif
}