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
}
__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
}
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
}
