/**
* @brief This function initializes the USB process.
*
* Depending on the mode supported (HOST/DEVICE/DUAL_ROLE) the function
* calls the coresponding usb mode initialization function
*
* @param none
*
* @return none
*/
void usb_task_init(void)
{
#if (USB_HOST_FEATURE == ENABLED && USB_DEVICE_FEATURE == ENABLED)
U8 delay;
#endif
#if (USE_USB_PADS_REGULATOR==ENABLE) // Otherwise assume USB PADs regulator is not used
Usb_enable_regulator();
#endif
// ---- DUAL ROLE DEVICE USB MODE ---------------------------------------------
#if ((USB_DEVICE_FEATURE == ENABLED)&& (USB_HOST_FEATURE == ENABLED))
Usb_enable_uid_pin();
delay=PORTA;
g_usb_mode=USB_MODE_UNDEFINED;
if(Is_usb_id_device())
{
g_usb_mode=USB_MODE_DEVICE;
usb_device_task_init();
}
else
{
g_usb_mode=USB_MODE_HOST;
Usb_ack_id_transition(); // REQUIRED !!! Startup with ID=0, Ack ID pin transistion (default hwd start up is device mode)
#if ( ID_PIN_CHANGE_GENERATE_RESET == ENABLE)
Usb_enable_id_interrupt();
#endif
Enable_interrupt();
usb_host_task_init();
}
g_old_usb_mode=g_usb_mode; // Store current usb mode, for mode change detection
// -----------------------------------------------------------------------------
// ---- DEVICE ONLY USB MODE ---------------------------------------------------
#elif ((USB_DEVICE_FEATURE == ENABLED)&& (USB_HOST_FEATURE == DISABLE))
Usb_force_device_mode();
usb_device_task_init();
// -----------------------------------------------------------------------------
// ---- REDUCED HOST ONLY USB MODE ---------------------------------------------
#elif ((USB_DEVICE_FEATURE == DISABLE)&& (USB_HOST_FEATURE == ENABLED))
Usb_force_host_mode();
usb_host_task_init();
#elif ((USB_DEVICE_FEATURE == DISABLE)&& (USB_HOST_FEATURE == DISABLE))
#error at least one of USB_DEVICE_FEATURE or USB_HOST_FEATURE should be enabled
#endif
// -----------------------------------------------------------------------------
}
//------------------------------------------------------------------------------
/// Initializes the USB process
/// Depending on the mode supported (HOST/DEVICE/DUAL_ROLE) the function calls
/// the coresponding USB mode initialization function
//------------------------------------------------------------------------------
void usb_task_init(void)
{
// DUAL ROLE DEVICE USB MODE
Otg_message_task_init(); // OTG program needs to display event messages to the user
b_uut_device_state = B_IDLE; // init state machines variables
device_state = DEVICE_UNATTACHED;
otg_device_nb_hnp_retry = BDEV_HNP_NB_RETRY;
Clear_all_user_request();
Usb_enable_uid_pin();
g_usb_mode=USB_MODE_UNDEFINED;
if(Is_usb_id_device()) {
g_usb_mode=USB_MODE_DEVICE;
#ifdef MSD_PROJECT
MSDDriver_Initialize(luns, numMedias);
#else
// HID
HIDDMouseDriver_Initialize();
#endif
id_changed_to_host_event = DISABLE;
}
else {
Usb_send_event(EVT_USB_HOST_FUNCTION);
g_usb_mode=USB_MODE_HOST;
// Startup with ID=0, Ack ID pin transistion (default hwd start up is device mode)
Usb_ack_id_transition();
Usb_enable_id_interrupt();
usb_host_task_init();
id_changed_to_host_event = ENABLE;
}
// Store current usb mode, for mode change detection
g_old_usb_mode = g_usb_mode;
}
void usb_task(void)
{
// ---- DUAL-ROLE DEVICE/HOST USB MODE -----------------------------------------
#if USB_DEVICE_FEATURE == true && USB_HOST_FEATURE == true
if (g_old_usb_mode != g_usb_mode)
{
if (Is_usb_id_device())
{
usb_device_task_init();
}else{
private_sof_counter = 0;
usb_host_task_init();
}
g_old_usb_mode = g_usb_mode; // Store current USB mode, for mode change detection
Usb_enable_id_interrupt();
Enable_global_interrupt();
}
// Depending on current USB mode, launch the correct USB task (device or host)
switch (g_old_usb_mode)
{
case USB_MODE_DEVICE:
usb_device_task();
break;
case USB_MODE_HOST:
usb_host_task();
break;
case USB_MODE_UNDEFINED:
default:
break;
}
// -----------------------------------------------------------------------------
// ---- DEVICE-ONLY USB MODE ---------------------------------------------------
#elif USB_DEVICE_FEATURE == true
usb_device_task();
// -----------------------------------------------------------------------------
// ---- REDUCED-HOST-ONLY USB MODE ---------------------------------------------
#elif USB_HOST_FEATURE == true
usb_host_task();
// -----------------------------------------------------------------------------
// ---- ERROR, NO MODE true -------------------------------------------------
#else
#error At least one of USB_DEVICE_FEATURE and USB_HOST_FEATURE must be enabled
#endif
// -----------------------------------------------------------------------------
}
void usb_task(void *pvParameters)
{
#endif // FREERTOS_USED
// Register the USB interrupt handler to the interrupt controller and enable
// the USB interrupt.
Disable_global_interrupt();
INTC_register_interrupt((__int_handler)&usb_general_interrupt, AVR32_USBB_IRQ, USB_INT_LEV);
Enable_global_interrupt();
#ifdef FREERTOS_USED
while (true)
{
// Wait for the semaphore
while (!xSemaphoreTake(usb_tsk_semphr, portMAX_DELAY));
#endif // FREERTOS_USED
// ---- DUAL-ROLE DEVICE/HOST USB MODE -----------------------------------------
#if USB_DEVICE_FEATURE == true && USB_HOST_FEATURE == true
#ifdef FREERTOS_USED
if (usb_device_tsk) vTaskDelete(usb_device_tsk), usb_device_tsk = NULL;
if (usb_host_tsk) vTaskDelete(usb_host_tsk), usb_host_tsk = NULL;
#endif
Usb_input_id_pin();
Usb_enable_id_pin();
if (Is_usb_id_device())
{
g_usb_mode = USB_MODE_DEVICE;
usb_device_task_init();
}
else
{
private_sof_counter = 0;
g_usb_mode = USB_MODE_HOST;
usb_host_task_init();
}
g_old_usb_mode = g_usb_mode; // Store current USB mode, for mode change detection
Usb_raise_id_transition(); // Check no ID transition has been missed during initialization
Usb_enable_id_interrupt();
Enable_global_interrupt();
// -----------------------------------------------------------------------------
// ---- DEVICE-ONLY USB MODE ---------------------------------------------------
#elif USB_DEVICE_FEATURE == true
#ifdef FREERTOS_USED
if (usb_device_tsk) vTaskDelete(usb_device_tsk), usb_device_tsk = NULL;
#endif
Usb_force_device_mode();
usb_device_task_init();
// -----------------------------------------------------------------------------
// ---- REDUCED-HOST-ONLY USB MODE ---------------------------------------------
#elif USB_HOST_FEATURE == true
#ifdef FREERTOS_USED
if (usb_host_tsk) vTaskDelete(usb_host_tsk), usb_host_tsk = NULL;
#endif
private_sof_counter = 0;
Usb_force_host_mode();
usb_host_task_init();
// -----------------------------------------------------------------------------
// ---- ERROR, NO MODE true -------------------------------------------------
#else
#error At least one of USB_DEVICE_FEATURE and USB_HOST_FEATURE must be enabled
#endif
// -----------------------------------------------------------------------------
#ifdef FREERTOS_USED
}
#endif
}
/**
* @brief Entry point of the USB mamnagement
*
* Depending on the USB mode supported (HOST/DEVICE/DUAL_ROLE) the function
* calls the coresponding usb management function.
*
* @param none
*
* @return none
*/
void usb_task(void)
{
// ---- DUAL ROLE DEVICE USB MODE ---------------------------------------------
#if ((USB_DEVICE_FEATURE == ENABLED)&& (USB_HOST_FEATURE == ENABLED))
if(Is_usb_id_device())
{ g_usb_mode=USB_MODE_DEVICE;}
else
{ g_usb_mode=USB_MODE_HOST;}
if( g_old_usb_mode != g_usb_mode )
{
// ID pin hot state change
#if ( ID_PIN_CHANGE_GENERATE_RESET == ENABLE)
// Hot ID transition generates wdt reset
wdtdrv_enable(WDTO_16MS);
while(1);
#else
// Hot ID transition reset USB mode
Usb_ack_id_transition(); // REQUIRED
if (Is_usb_id_host())
{
Usb_disable_resume_interrupt();
Usb_disable_wake_up_interrupt();
Usb_disable_suspend_interrupt();
Usb_disable_reset_interrupt();
Usb_detach();
Usb_disable();
usb_host_task_init();
}
else
{
Host_disable_device_disconnection_interrupt();
Host_disable_sof_interrupt();
Host_disable_sof();
Usb_disable_vbus();
Usb_disable_manual_vbus();
Usb_freeze_clock();
Usb_disable();
usb_device_task_init();
}
#endif
}
// Store current usb mode, for mode change detection
g_old_usb_mode=g_usb_mode;
// Depending on current usb mode, launch the correct usb task (device or host)
switch(g_usb_mode)
{
case USB_MODE_DEVICE:
usb_device_task();
break;
case USB_MODE_HOST:
usb_host_task();
break;
case USB_MODE_UNDEFINED: // No break !
default:
break;
}
// -----------------------------------------------------------------------------
// ---- DEVICE ONLY USB MODE ---------------------------------------------------
#elif ((USB_DEVICE_FEATURE == ENABLED)&& (USB_HOST_FEATURE == DISABLE))
usb_device_task();
// -----------------------------------------------------------------------------
// ---- REDUCED HOST ONLY USB MODE ---------------------------------------------
#elif ((USB_DEVICE_FEATURE == DISABLE)&& (USB_HOST_FEATURE == ENABLED))
usb_host_task();
// -----------------------------------------------------------------------------
//! ---- ERROR, NO MODE ENABLED -------------------------------------------------
#elif ((USB_DEVICE_FEATURE == DISABLE)&& (USB_HOST_FEATURE == DISABLE))
#error at least one of USB_DEVICE_FEATURE or USB_HOST_FEATURE should be enabled
#error otherwise the usb task has nothing to do ...
#endif
// -----------------------------------------------------------------------------
}
void usb_host_task(void)
#endif
{
#define DEVICE_DEFAULT_MAX_ERROR_COUNT 2
static uint8_t device_default_error_count;
#ifdef HOST_VBUS_LOW_TIMEOUT
extern t_cpu_time timer_vbus_low;
#endif
static bool sav_int_sof_enable;
uint8_t pipe;
#ifdef FREERTOS_USED
portTickType xLastWakeTime;
xLastWakeTime = xTaskGetTickCount();
while (true)
{
vTaskDelayUntil(&xLastWakeTime, configTSK_USB_HST_PERIOD);
#endif // FREERTOS_USED
switch (device_state)
{
#ifdef HOST_VBUS_LOW_TIMEOUT
case DEVICE_VBUS_LOW:
Usb_disable_vbus();
if (cpu_is_timeout(&timer_vbus_low))
usb_host_task_init();
break;
#endif
//------------------------------------------------------
// DEVICE_UNATTACHED state
//
// - Default init state
// - Try to give device power supply
//
case DEVICE_UNATTACHED:
device_default_error_count = 0;
nb_interface_supported = 0;
Host_clear_device_status(); // Reset device status
Usb_clear_all_event(); // Clear all software events
Host_disable_sof();
host_disable_all_pipes();
Usb_enable_vbus(); // Give at least device power supply!
// If VBus OK, wait for device connection
if (Is_usb_vbus_high())
device_state = DEVICE_ATTACHED;
break;
//------------------------------------------------------
// DEVICE_ATTACHED state
//
// - VBus is on
// - Try to detect device connection
//
case DEVICE_ATTACHED:
if (Is_host_device_connection() || Is_usb_event(EVT_HOST_CONNECTION) ) // Device pull-up detected
{
device_attached_retry:
if( Is_usb_event(EVT_HOST_CONNECTION) ) {
Usb_ack_event(EVT_HOST_CONNECTION);
}
Usb_ack_bconnection_error_interrupt();
Usb_ack_vbus_error_interrupt();
Host_ack_device_connection();
Host_clear_device_status(); // Reset device status
cpu_irq_disable();
Host_disable_device_disconnection_interrupt();
Host_send_reset(); // First USB reset
(void)Is_host_sending_reset();
cpu_irq_enable();
Usb_ack_event(EVT_HOST_SOF);
// Active wait for end of reset send
while (Is_host_sending_reset())
{
// The USB macro does not signal the end of reset when a disconnection occurs
if (Is_host_device_disconnection())
{
// Stop sending USB reset
Host_stop_sending_reset();
}
}
Host_ack_reset_sent();
Host_enable_sof(); // Start SOF generation
Host_enable_sof_interrupt(); // SOF will be detected under interrupt
if (!Is_host_device_disconnection())
{
// Workaround for some buggy devices with powerless pull-up
// usually low-speed where data line rises slowly and can be interpreted as disconnection
for (sof_cnt = 0; sof_cnt < 0xFFFF; sof_cnt++) // Basic time-out counter
{
// If we detect SOF, device is still alive and connected, just clear false disconnect flag
if (Is_usb_event(EVT_HOST_SOF) && Is_host_device_disconnection())
{
Host_ack_device_connection();
Host_ack_device_disconnection();
break;
}
}
}
Host_enable_device_disconnection_interrupt();
sof_cnt = 0;
while (sof_cnt < 100) // Wait 100 ms after USB reset
{
if (Is_usb_event(EVT_HOST_SOF)) Usb_ack_event(EVT_HOST_SOF), sof_cnt++; // Count SOFs
if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) goto device_attached_error;
}
device_state = DEVICE_POWERED;
LOG_STR(log_device_connected);
Host_device_connection_action();
sof_cnt = 0;
}
device_attached_error:
// Device connection error, or VBus pb -> Retry the connection process from the beginning
if (Is_usb_bconnection_error_interrupt() || Is_usb_vbus_error_interrupt() || Is_usb_vbus_low())
{
if (device_state != DEVICE_VBUS_LOW)
device_state = DEVICE_UNATTACHED;
Usb_ack_bconnection_error_interrupt();
Usb_ack_vbus_error_interrupt();
Host_disable_sof();
}
break;
//------------------------------------------------------
// DEVICE_POWERED state
//
// - Device connection (attach) has been detected,
// - Wait 100 ms and configure default control pipe
//
case DEVICE_POWERED:
if (Is_usb_event(EVT_HOST_SOF))
{
Usb_ack_event(EVT_HOST_SOF);
if (sof_cnt++ >= 100) // Wait 100 ms
{
Host_enable_pipe(P_CONTROL);
(void)Host_configure_pipe(P_CONTROL,
0,
EP_CONTROL,
TYPE_CONTROL,
TOKEN_SETUP,
8,
SINGLE_BANK);
device_state = DEVICE_DEFAULT;
}
}
break;
//------------------------------------------------------
// DEVICE_DEFAULT state
//
// - Get device descriptor
// - Reconfigure control pipe according to device control endpoint
// - Assign device address
//
case DEVICE_DEFAULT:
// Get first device descriptor
if (host_get_device_descriptor_incomplete() == CONTROL_GOOD)
{
sof_cnt = 0;
while (sof_cnt < 20) // Wait 20 ms before USB reset (special buggy devices...)
{
if (Is_usb_event(EVT_HOST_SOF)) Usb_ack_event(EVT_HOST_SOF), sof_cnt++;
if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) break;
}
cpu_irq_disable();
Host_disable_device_disconnection_interrupt();
Host_send_reset(); // First USB reset
(void)Is_host_sending_reset();
cpu_irq_enable();
Usb_ack_event(EVT_HOST_SOF);
// Active wait for end of reset send
while (Is_host_sending_reset())
{
// The USB macro does not signal the end of reset when a disconnection occurs
if (Is_host_device_disconnection())
{
// Stop sending USB reset
Host_stop_sending_reset();
}
}
Host_ack_reset_sent();
if (!Is_host_device_disconnection())
{
// Workaround for some buggy devices with powerless pull-up
// usually low-speed where data line rises slowly and can be interpreted as disconnection
for (sof_cnt = 0; sof_cnt < 0xFFFF; sof_cnt++) // Basic time-out counter
{
// If we detect SOF, device is still alive and connected, just clear false disconnect flag
if (Is_usb_event(EVT_HOST_SOF) && Is_host_device_disconnection())
{
Host_ack_device_connection();
Host_ack_device_disconnection();
break;
}
}
}
Host_enable_device_disconnection_interrupt();
sof_cnt = 0;
while (sof_cnt < 200) // Wait 200 ms after USB reset
{
if (Is_usb_event(EVT_HOST_SOF)) Usb_ack_event(EVT_HOST_SOF), sof_cnt++;
if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) break;
}
Host_disable_pipe(P_CONTROL);
Host_unallocate_memory(P_CONTROL);
Host_enable_pipe(P_CONTROL);
// Reconfigure the control pipe according to the device control endpoint
(void)Host_configure_pipe(P_CONTROL,
0,
EP_CONTROL,
TYPE_CONTROL,
TOKEN_SETUP,
data_stage[OFFSET_FIELD_MAXPACKETSIZE],
SINGLE_BANK);
// Give an absolute device address
if (host_set_address(DEVICE_ADDRESS) == CONTROL_GOOD)
{
for (pipe = 0; pipe < MAX_PEP_NB; pipe++)
Host_configure_address(pipe, DEVICE_ADDRESS);
device_state = DEVICE_ADDRESSED;
}
else if (device_state != DEVICE_VBUS_LOW)
device_state = DEVICE_ERROR;
}
else
{
if (device_state != DEVICE_VBUS_LOW)
{
if (++device_default_error_count > DEVICE_DEFAULT_MAX_ERROR_COUNT)
device_state = DEVICE_ERROR;
else
{
Host_disable_sof();
Host_disable_pipe(P_CONTROL);
Host_unallocate_memory(P_CONTROL);
device_state = DEVICE_ATTACHED;
goto device_attached_retry;
}
}
Usb_ack_bconnection_error_interrupt();
Usb_ack_vbus_error_interrupt();
Host_disable_sof();
}
break;
//------------------------------------------------------
// DEVICE_ADDRESSED state
//
// - Check if VID PID is in supported list
//
case DEVICE_ADDRESSED:
if (host_get_device_descriptor() == CONTROL_GOOD)
{
// Detect if the device connected belongs to the supported devices table
if (host_check_VID_PID())
{
Host_set_device_supported();
Host_device_supported_action();
device_state = DEVICE_CONFIGURED;
}
else
{
#if HOST_STRICT_VID_PID_TABLE == ENABLE
device_state = DEVICE_ERROR;
LOG_STR(log_unsupported_device);
#else
device_state = DEVICE_CONFIGURED;
#endif
Host_device_not_supported_action();
}
}
else if (device_state != DEVICE_VBUS_LOW)
device_state = DEVICE_ERROR; // Can not get device descriptor
break;
//------------------------------------------------------
// DEVICE_CONFIGURED state
//
// - Configure pipes for the supported interface
// - Send Set_configuration() request
// - Go to full operating mode (device ready)
//
case DEVICE_CONFIGURED:
{
uint8_t configuration_index = 0;
if (host_get_configuration_descriptor(configuration_index) == CONTROL_GOOD)
{
if (host_check_class()) // Class support OK?
{
#if HOST_AUTO_CFG_ENDPOINT == DISABLE
User_configure_endpoint(); // User call here instead of autoconfig
Host_set_configured(); // Assumes config is OK with user config
#endif
if (Is_host_configured())
{
if (host_set_configuration(data_stage[OFFSET_FIELD_CONFIGURATION_NB]) == CONTROL_GOOD) // Send Set_configuration
{
// Device and host are now fully configured
// go to DEVICE_READY normal operation
device_state = DEVICE_READY;
// Monitor device disconnection under interrupt
Host_enable_device_disconnection_interrupt();
// If user host application requires SOF interrupt event
// Keep SOF interrupt enabled, otherwise disable this interrupt
#if HOST_CONTINUOUS_SOF_INTERRUPT == DISABLE
cpu_irq_disable();
Host_disable_sof_interrupt();
(void)Is_host_sof_interrupt_enabled();
cpu_irq_enable();
#endif
Host_new_device_connection_action();
cpu_irq_enable();
LOG_STR(log_device_enumerated);
}
else if (device_state != DEVICE_VBUS_LOW)
device_state = DEVICE_ERROR; // Problem during Set_configuration request...
}
}
else // Device class not supported...
{
device_state = DEVICE_UNSUPPORTED;
LOG_STR(log_unsupported_device);
Host_device_class_not_supported_action();
}
}
else if (device_state != DEVICE_VBUS_LOW)
device_state = DEVICE_ERROR; // Can not get configuration descriptors...
}
break;
//------------------------------------------------------
// DEVICE_READY state
//
// - Full standard operating mode
// - Nothing to do...
//
case DEVICE_READY: // Host full standard operating mode!
break;
//------------------------------------------------------
// DEVICE_UNSUPPORTED state
//
case DEVICE_UNSUPPORTED:
break;
//------------------------------------------------------
// DEVICE_ERROR state
//
// - Error state
// - Do custom action call (probably go to default mode...)
//
case DEVICE_ERROR: //! @todo
#if HOST_ERROR_RESTART == ENABLE
device_state = DEVICE_UNATTACHED;
#endif
Host_device_error_action();
break;
//------------------------------------------------------
// DEVICE_SUSPENDED state
//
// - Host application request to suspend the device activity
// - State machine comes here thanks to Host_request_suspend()
//
case DEVICE_SUSPENDED:
if (Is_device_supports_remote_wakeup()) // If the connected device supports remote wake-up
{
host_set_feature_remote_wakeup(); // Enable this feature...
}
LOG_STR(log_usb_suspended);
sav_int_sof_enable = Is_host_sof_interrupt_enabled(); //Save current SOF interrupt enable state
cpu_irq_disable();
Host_disable_sof_interrupt();
(void)Is_host_sof_interrupt_enabled();
cpu_irq_enable();
Host_ack_sof();
Host_disable_sof(); // Stop SOF generation, this generates the suspend state
Host_ack_hwup();
Host_enable_hwup_interrupt(); // Enable host wake-up interrupt
// (this is the unique USB interrupt able to wake up the CPU core from power-down mode)
(void)Is_host_hwup_interrupt_enabled(); // Make sure host wake-up interrupt is enabled
Usb_freeze_clock();
//! @todo Implement this on the silicon version
//Stop_pll();
Host_suspend_action(); // Custom action here! (e.g. go to power-save mode...)
device_state = DEVICE_WAIT_RESUME; // Wait for device resume event
break;
//------------------------------------------------------
// DEVICE_WAIT_RESUME state
//
// Wait in this state till:
// - the host receives an upstream resume from the device
// - or the host software request the device to resume
//
case DEVICE_WAIT_RESUME:
if (Is_usb_event(EVT_HOST_HWUP) || Is_host_request_resume()) // Remote wake-up has been detected
// or local resume request has been received
{
if (Is_host_request_resume()) // Not a remote wake-up, but a host application request
{
// CAUTION: HWUP can be cleared only when USB clock is active
//! @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
cpu_irq_disable();
Host_disable_hwup_interrupt(); // Wake-up interrupt should be disabled as host is now awoken!
(void)Is_host_hwup_interrupt_enabled();
cpu_irq_enable();
Host_ack_hwup(); // Clear HWUP interrupt flag
}
Host_enable_sof();
Host_send_resume(); // Send downstream resume
while (!Is_host_down_stream_resume()); // Wait for downstream resume sent
Host_ack_remote_wakeup(); // Ack remote wake-up reception
Host_ack_request_resume(); // Ack software request
Host_ack_down_stream_resume(); // Ack downstream resume sent
Usb_ack_event(EVT_HOST_HWUP); // Ack software event
if (sav_int_sof_enable) Host_enable_sof_interrupt(); // Restore SOF interrupt enable state before suspend
device_state = DEVICE_READY; // Come back to full operating mode
LOG_STR(log_usb_resumed);
}
break;
//------------------------------------------------------
// default state
//
// - Default case: ERROR
// - Go to DEVICE_UNATTACHED state
//
default:
device_state = DEVICE_UNATTACHED;
break;
}
#ifdef FREERTOS_USED
}
#endif
}
