//!
//! @brief This function initializes the USB device controller and system interrupt
//!
//! This function enables the USB controller and init the USB interrupts.
//! The aim is to allow the USB connection detection in order to send
//! the appropriate USB event to the operating mode manager.
//!
//! @param none
//!
//! @return none
//!
//!/
void usb_device_task_init(void)
{
Enable_interrupt();
Usb_disable();
Usb_enable();
Usb_select_device();
#if (USB_LOW_SPEED_DEVICE==ENABLE)
Usb_low_speed_mode();
#endif
Enable_interrupt();
#if (USB_OTG_FEATURE == ENABLED)
Usb_enable_id_interrupt();
Clear_otg_features_from_host();
otg_device_sessions = 0;
#endif
}
//! @brief Entry point of the USB device mamagement
//!
//! This function is the entry point of the USB management. Each USB
//! event is checked here in order to launch the appropriate action.
//! If a Setup request occurs on the Default Control Endpoint,
//! the usb_process_request() function is call in the usb_standard_request.c file
//!
//! @param none
//!
//! @return none
void usb_device_task(void)
{
#if (USB_OTG_FEATURE == ENABLED)
// Check if a reset has been received
if(Is_usb_event(EVT_USB_RESET))
{
Usb_ack_event(EVT_USB_RESET);
Usb_reset_endpoint(0);
usb_configuration_nb=0;
otg_b_device_state = B_IDLE;
Clear_otg_features_from_host();
}
// When OTG mode enabled, B-Device is managed thanks to its state machine
switch (otg_b_device_state)
{
//------------------------------------------------------
// B_IDLE state
//
// - waits for Vbus to rise
// - initiate SRP if asked by user
//
case B_IDLE:
if (Is_usb_vbus_high())
{
// Vbus rise
usb_connected = TRUE;
remote_wakeup_feature = DISABLED;
usb_start_device();
Usb_vbus_on_action();
Usb_attach();
otg_b_device_state = B_PERIPHERAL;
Ack_user_request_srp();
Clear_otg_features_from_host();
remote_wakeup_feature = DISABLED;
End_session_with_srp();
if (Is_srp_sent_and_waiting_answer() && (sof_seen_in_session == TRUE))
{
Ack_srp_sent_and_answer();
Otg_print_new_failure_message(OTGMSG_A_RESPONDED,OTG_TEMPO_2SEC);
}
Usb_enable_sof_interrupt();
}
else
{
if (Is_user_requested_srp() && Is_usb_id_device())
{
// User has requested a SRP
Ack_user_request_srp();
if (!Is_srp_sent_and_waiting_answer())
{
Pll_start_auto(); // reinit device mode
Wait_pll_ready();
Usb_disable();
Usb_enable_uid_pin();
Usb_enable();
Usb_unfreeze_clock();
Usb_select_device();
Usb_attach();
otg_b_device_state = B_SRP_INIT;
Usb_device_initiate_srp(); // hardware waits for initial condition (SE0, Session End level)
sof_seen_in_session = FALSE;
}
}
if ((Is_srp_sent_and_waiting_answer()) && (Is_tb_srp_counter_overflow()))
{
// SRP failed because A-Device did not respond
End_session_with_srp();
Ack_srp_sent_and_answer();
Otg_print_new_failure_message(OTGMSG_SRP_A_NO_RESP,OTG_TEMPO_3SEC);
}
}
break;
//------------------------------------------------------
// B_SRP_INIT
//
// - a SRP has been initiated
// - B-Device waits it is finished to initialize variables
//
case B_SRP_INIT:
if (!Is_usb_device_initiating_srp())
{
otg_b_device_state = B_IDLE; // SRP initiated, return to Idle state (wait for Vbus to rise)
Srp_sent_and_waiting_answer();
Init_tb_srp_counter();
Start_session_with_srp();
Otg_print_new_event_message(OTGMSG_SRP_STARTED,TB_SRP_FAIL_MIN);
}
break;
//------------------------------------------------------
// B_PERIPHERAL : the main state of OTG Peripheral
//
// - all events are interrupt-handled
// - but they are saved and this function can execute alternate actions
// - also handle user requests (disconnect)
//
// ======================================================================================
case B_PERIPHERAL:
if (Is_otg_event(EVT_OTG_DEVICE_CONNECTED))
{
Otg_ack_event(EVT_OTG_DEVICE_CONNECTED); // set on a SetConfiguration descriptor reception
Otg_print_new_event_message(OTGMSG_CONNECTED_TO_A,OTG_TEMPO_4SEC);
}
if (Is_usb_event(EVT_USB_SUSPEND)) // SUSPEND state
{
// Suspend and HNP operations are handled in the interrupt functions
}
if (Is_srp_sent_and_waiting_answer() && (sof_seen_in_session == TRUE))
{
Ack_srp_sent_and_answer();
Otg_print_new_failure_message(OTGMSG_A_RESPONDED,OTG_TEMPO_2SEC);
}
if ((Is_srp_sent_and_waiting_answer()) && (Is_tb_srp_counter_overflow()))
{
// SRP failed because A-Device did not respond
End_session_with_srp();
Ack_srp_sent_and_answer();
Otg_print_new_failure_message(OTGMSG_SRP_A_NO_RESP,OTG_TEMPO_3SEC);
}
if (Is_usb_event(EVT_USB_RESUME) && !Is_usb_pending_remote_wake_up()) // RESUME signal detected
{
Usb_ack_event(EVT_USB_RESUME);
Usb_ack_event(EVT_USB_SUSPEND);
Usb_ack_remote_wake_up_start();
}
if (Is_usb_event(EVT_USB_UNPOWERED))
{
Usb_ack_event(EVT_USB_UNPOWERED);
Clear_all_user_request();
otg_b_device_state = B_IDLE;
}
if(Is_usb_event(EVT_USB_RESET))
{
Usb_ack_event(EVT_USB_RESET);
Usb_reset_endpoint(0);
usb_configuration_nb=0;
Clear_otg_features_from_host();
}
if (Is_otg_event(EVT_OTG_HNP_ERROR))
{
Otg_ack_event(EVT_OTG_HNP_ERROR);
Otg_print_new_failure_message(OTGMSG_DEVICE_NO_RESP,OTG_TEMPO_4SEC);
PORTC &= ~0x10;
}
if (Is_user_requested_disc())
{
Ack_user_request_disc();
if (Is_usb_id_device())
{
Usb_detach();
Usb_freeze_clock();
while (Is_usb_vbus_high()); // wait for Vbus to be under Va_vbus_valid
otg_b_device_state = B_IDLE;
usb_configuration_nb = 0;
usb_connected = FALSE;
Clear_all_user_request();
}
}
break;
//------------------------------------------------------
// B_HOST
//
// - state entered after an HNP success
// - handle user requests (disconnection, suspend, hnp)
// - call the "host_task()" for Host level handlers
//
// ======================================================================================
case B_HOST:
if (Is_otg_event(EVT_OTG_DEV_UNSUPPORTED))
{
Otg_ack_event(EVT_OTG_DEV_UNSUPPORTED);
Clear_all_user_request();
otg_b_device_state = B_IDLE;
device_state = DEVICE_UNATTACHED;
}
if (Is_user_requested_disc() || Is_user_requested_suspend() || Is_user_requested_hnp())
{
Ack_user_request_disc(); // suspend and hnp requests cleared in B_END_HNP_SUSPEND stage
Host_disable_sof(); // go into suspend mode
Usb_host_reject_hnp();
otg_b_device_state = B_END_HNP_SUSPEND;
Usb_ack_suspend();
Usb_enable_suspend_interrupt();
}
if (Is_usb_event(EVT_USB_UNPOWERED))
{
Usb_ack_event(EVT_USB_UNPOWERED);
Usb_freeze_clock();
otg_b_device_state = B_IDLE;
device_state = DEVICE_UNATTACHED;
}
usb_host_task(); // call the host task
break;
//------------------------------------------------------
// B_END_HNP_SUSPEND
//
// - device enters this state after being B_HOST, on a user request to stop bus activity (suspend, disconnect or hnp request)
// - macro is reset to peripheral mode
//
// ======================================================================================
case B_END_HNP_SUSPEND:
if (Is_usb_event(EVT_USB_SUSPEND))
{
Usb_ack_event(EVT_USB_SUSPEND);
Usb_device_stop_hnp();
Usb_select_device();
device_state = DEVICE_UNATTACHED;
if (Is_user_requested_hnp() || Is_user_requested_suspend())
{
otg_b_device_state = B_PERIPHERAL;
Ack_user_request_suspend();
Ack_user_request_hnp();
}
else
{
otg_b_device_state = B_IDLE;
Usb_detach();
Usb_freeze_clock();
}
}
break;
default:
otg_b_device_state = B_IDLE;
Clear_all_user_request();
device_state = DEVICE_UNATTACHED;
break;
}
#else
// Non-OTG exclusives Device operations
// VBUS state detection
if (Is_usb_vbus_high()&& (usb_connected==FALSE))
{
usb_connected = TRUE;
remote_wakeup_feature = DISABLED;
Usb_vbus_on_action();
Usb_send_event(EVT_USB_POWERED);
usb_start_device();
}
if (Is_usb_vbus_low()&& (usb_connected==TRUE))
{
usb_connected = FALSE;
usb_configuration_nb = 0;
Usb_send_event(EVT_USB_UNPOWERED);
Usb_detach();
Usb_freeze_clock();
Usb_vbus_off_action();
}
if(Is_usb_event(EVT_USB_RESET))
{
Usb_ack_event(EVT_USB_RESET);
Usb_reset_endpoint(0);
usb_configuration_nb=0;
}
#endif
// =======================================
// Common Standard Device Control Requests
// =======================================
// - device enumeration process
// - device control commands and features
Usb_select_endpoint(EP_CONTROL);
if (Is_usb_receive_setup())
{
usb_process_request();
}
}
//------------------------------------------------------------------------------
/// USB interrupt subroutine
///
/// This function is called each time a USB interrupt occurs.
/// The following USB DEVICE events are taken in charge:
/// - VBus On / Off
/// - Start Of Frame
/// - Suspend
/// - Wake-Up
/// - Resume
/// - Reset
/// - Start of frame
///
/// The following USB HOST events are taken in charge:
/// - Device connection
/// - Device Disconnection
/// - Start Of Frame
/// - ID pin change
/// - SOF (or Keep alive in low speed) sent
/// - Wake up on USB line detected
///
/// The following USB HOST events are taken in charge:
/// - HNP success (Role Exchange)
/// - HNP failure (HNP Error)
///
/// For each event, the user can launch an action by completing
/// the associate define (See conf_usb.h file to add action upon events)
///
/// Note: Only interrupts events that are enabled are processed
//------------------------------------------------------------------------------
void usb_general_interrupt(void)
{
//TRACE_DEBUG("usb_general_interrupt\n\r");
// ---------- DEVICE events management -----------------------------------
// -----------------------------------------------------------------------
//- VBUS state detection
// -----------------------------------------------------------------------
/// Arbitrer
// -----------------------------------------------------------------------
if (Is_usb_vbus_transition() && Is_usb_vbus_interrupt_enabled()
&& Is_usb_id_device()) {
Usb_ack_vbus_transition();
if (Is_usb_vbus_high()) {
usb_connected = TRUE;
Usb_vbus_on_action();
Usb_send_event(EVT_USB_POWERED);
//jcb Usb_enable_reset_interrupt();
//usb_start_device();
USBD_Connect();//Usb_attach();
}
else {
TRACE_DEBUG("VBUS low\n\r");
USBD_Disconnect();
Usb_device_stop_hnp();
TRACE_DEBUG("Usb_select_device4\n\r");
Usb_select_device();
Clear_all_user_request();
Usb_vbus_off_action();
usb_connected = FALSE;
usb_configuration_nb = 0;
Usb_send_event(EVT_USB_UNPOWERED);
}
}
// -----------------------------------------------------------------------
/// Device
// -----------------------------------------------------------------------
// - Device start of frame received
if (Is_usb_sof() && Is_sof_interrupt_enabled()) {
// TRACE_DEBUG_WP("F"); // device
Usb_ack_sof();
Usb_sof_action();
//sof_seen_in_session = TRUE;
otg_last_sof_received = UDFNUML; // store last frame number received
}
// -----------------------------------------------------------------------
/// Device
// -----------------------------------------------------------------------
// - Device Suspend event (no more USB activity detected)
if (Is_usb_suspend()) { //&& Is_suspend_interrupt_enabled()) {
//TRACE_DEBUG_WP("D\n\r");
// 1st : B-PERIPH mode ?
if (Is_usb_id_device()) {
// HNP Handler
TRACE_DEBUG("HNP Handler\n\r");
//TRACE_DEBUG("device_state = %d\n\r", device_state);
//TRACE_DEBUG("b_uut_device_state = %d\n\r", b_uut_device_state);
if (Is_host_requested_hnp() // "b_hnp_enable" feature received
&& (Is_session_started_with_srp() || Is_user_requested_hnp() )) {
if (otg_device_nb_hnp_retry == 0) {
otg_features_supported &= ~USBFeatureRequest_OTG_B_HNP_ENABLE;
}
else {
Ack_user_request_hnp();
Usb_ack_hnp_error_interrupt();
Usb_ack_role_exchange_interrupt();
Usb_enable_role_exchange_interrupt();
Usb_enable_hnp_error_interrupt();
Usb_device_initiate_hnp();
otg_device_nb_hnp_retry--;
}
}
else
{
// Remote wake-up handler
//TRACE_DEBUG("Remote wake-up handler\n\r");
//TRACE_DEBUG("device_state = %d\n\r", device_state);
//TRACE_DEBUG("b_uut_device_state = %d\n\r", b_uut_device_state);
if ((remote_wakeup_feature == ENABLE) && (usb_configuration_nb != 0))
{
//TRACE_DEBUG("enabled\n\r");
// After that user can execute "Usb_initiate_remote_wake_up()" to initiate a remote wake-up
// Note that the suspend interrupt flag SUSPI must still be set to enable upstream resume
// So the SUSPE enable bit must be cleared to avoid redundant interrupt
// ****************
// Please note also that is Vbus is lost during an upstream resume (Host disconnection),
// the RMWKUP bit (used to initiate remote wake up and that is normally cleared by hardware when sent)
// remains set after the event, so that a good way to handle this feature is :
// Usb_initiate_remote_wake_up();
// while (Is_usb_pending_remote_wake_up())
// {
// if (Is_usb_vbus_low())
// {
// // Emergency action (reset macro, etc.) if Vbus lost during resuming
// break;
// }
// }
// Usb_ack_remote_wake_up_start();
// ****************
}
else {
//TRACE_DEBUG("disabled: %d %d\n\r", usb_configuration_nb, remote_wakeup_feature);
// No remote wake-up supported
Usb_send_event(EVT_USB_SUSPEND);
}
}
}
else
{
//TRACE_DEBUG("ici\n\r");
// A-PERIPH mode (will cause a session end, handled in usb_host_task.c)
Usb_send_event(EVT_USB_SUSPEND);
Usb_suspend_action();
//jcb Usb_ack_suspend();
}
}
// -----------------------------------------------------------------------
/// Device
// -----------------------------------------------------------------------
// - Wake up event (USB activity detected): Used to resume
if (Is_usb_wake_up() && Is_swake_up_interrupt_enabled()) {
TRACE_DEBUG("W\n\r");
Usb_unfreeze_clock();
Usb_send_event(EVT_USB_WAKE_UP);
}
// -----------------------------------------------------------------------
/// Device
// -----------------------------------------------------------------------
// - Resume state bus detection
if (Is_usb_resume() && Is_resume_interrupt_enabled()) {
TRACE_DEBUG("Resume state bus detect\n\r");
Usb_send_event(EVT_USB_RESUME);
}
// -----------------------------------------------------------------------
/// Device
// -----------------------------------------------------------------------
// - USB bus reset detection
if (Is_usb_reset()&& Is_reset_interrupt_enabled()) {
TRACE_DEBUG_WP("B\n\r");
if (Is_usb_id_host()) {
//TRACE_DEBUG_WP("id_host\n\r");
dev_configure_endpoint(EP_CONTROL,
TYPE_CONTROL,
DIRECTION_OUT,
SIZE_64,
ONE_BANK,
NYET_DISABLED);
}
// First initialization is important to be synchronized
// A reset must first have been received
if (device_state == A_PERIPHERAL) {
//TRACE_DEBUG_WP("r A_PERIPHERAL\n\r");
otg_last_sof_received = UDFNUML;
otg_last_sof_stored = UDFNUML;
Usb_ack_sof();
Usb_enable_sof_interrupt();
reset_received = TRUE;
Timer16_set_counter(0);
}
Usb_reset_action();
Usb_send_event(EVT_USB_RESET);
}
// ---------- OTG events management ------------------------------------
// ---------------------------------------------------------------------
// -----------------------------------------------------------------------
/// Arbitrer
// -----------------------------------------------------------------------
// - OTG HNP Success detection
if (Is_usb_role_exchange_interrupt() && Is_role_exchange_interrupt_enabled()) {
// TRACE_DEBUG("OTG HNP detect\n\r");
Usb_ack_role_exchange_interrupt();
Host_ack_device_connection();
Host_ack_device_disconnection();
Otg_send_event(EVT_OTG_HNP_SUCCESS);
End_session_with_srp();
Clear_otg_features_from_host();
if (Is_usb_id_host()) {
// HOST (A- or B-) mode
if ((device_state != A_PERIPHERAL) && (device_state != A_END_HNP_WAIT_VFALL)) {
static volatile unsigned int jcb;
// Current mode is A-HOST, device will take the A-PERIPHERAL role
b_uut_device_state = B_PERIPHERAL;
device_state = A_PERIPHERAL;
usb_connected = FALSE;
usb_configuration_nb = 0;
Usb_select_device();
USBD_Connect();//Usb_attach();
Usb_unfreeze_clock();
Usb_disable_role_exchange_interrupt();
Usb_disable_hnp_error_interrupt();
Usb_device_stop_hnp();
Usb_ack_reset();
Timer16_set_counter(0);
Usb_freeze_clock(); // USB clock can be freezed to slow down events and condition detection
//jcb while (Timer16_get_counter_low() != 20);
jcb=0;
while( jcb <100000){ jcb++; }
Usb_unfreeze_clock();
reset_received = FALSE;
Usb_disable_sof_interrupt(); // will be set in the next OTG Timer IT (mandatory)
Usb_enable_suspend_interrupt();
Usb_enable_reset_interrupt();
dev_configure_endpoint(EP_CONTROL,
TYPE_CONTROL,
DIRECTION_OUT,
SIZE_64,
ONE_BANK,
NYET_DISABLED);
}
}
else {
// In B_HOST mode, the HNPREQ bit must not be cleared because it releases the bus in suspend mode (and sof can't start)
if ((b_uut_device_state != B_HOST) && (b_uut_device_state != B_END_HNP_SUSPEND)) {
static volatile unsigned int jcb2;
// Current mode is B-PERIPHERAL, device will go into B-HOST role
End_session_with_srp();
Clear_otg_features_from_host();
b_uut_device_state = B_HOST;
device_state = DEVICE_ATTACHED;
usb_connected = FALSE;
usb_configuration_nb = 0;
TRACE_DEBUG("Select host 3\n\r");
Usb_select_host();
TRACE_DEBUG("Send reset\n\r");
Host_send_reset(); // send the first RESET
while (Host_is_reset());
TRACE_DEBUG("Reset passed\n\r");
jcb2=0;
while( jcb2 <1000000){ jcb2++; }
Host_enable_sof(); // start Host (sof)
Usb_disable_role_exchange_interrupt();
Usb_disable_hnp_error_interrupt();
Clear_all_user_request();
TRACE_DEBUG("Select host 3\n\r");
}
}
}
// -----------------------------------------------------------------------
/// Arbitrer
// -----------------------------------------------------------------------
// - OTG HNP Failure detection
if (Is_usb_hnp() && Is_usb_hnp_error_interrupt()&& Is_hnp_error_interrupt_enabled()) {
TRACE_DEBUG("OTG HNP failure\n\r");
Usb_device_stop_hnp();
Usb_disable_role_exchange_interrupt();
Usb_disable_hnp_error_interrupt();
Usb_ack_hnp_error_interrupt();
if (Is_usb_id_device()) {
Otg_send_event(EVT_OTG_HNP_ERROR);
Clear_all_user_request();
}
}
// ---------- HOST events management -----------------------------------
// ---------------------------------------------------------------------
// -----------------------------------------------------------------------
/// Arbitrer
// -----------------------------------------------------------------------
// - ID pin change detection
if(Is_usb_id_transition()&&Is_usb_id_interrupt_enabled()) {
TRACE_DEBUG("ID pin change\n\r");
TRACE_DEBUG("device_state = %d\n\r", device_state);
TRACE_DEBUG("b_uut_device_state = %d\n\r", b_uut_device_state);
Usb_device_stop_hnp();
Clear_all_user_request();
if(Is_usb_id_device()) {
g_usb_mode = USB_MODE_DEVICE;
}
else {
g_usb_mode = USB_MODE_HOST;
}
Usb_ack_id_transition();
if( g_usb_mode != g_old_usb_mode) { // Basic Debounce
if(Is_usb_id_device()) { // Going into device mode
Usb_send_event(EVT_USB_DEVICE_FUNCTION);
b_uut_device_state = B_IDLE;
device_state = DEVICE_UNATTACHED;
id_changed_to_host_event = DISABLE;
}
else { // Going into host mode
b_uut_device_state = B_IDLE;
device_state = DEVICE_UNATTACHED;
Usb_send_event(EVT_USB_HOST_FUNCTION);
id_changed_to_host_event = ENABLE;
}
Usb_id_transition_action();
TRACE_INFO("Pin Id changed\n\r");
}
}
// -----------------------------------------------------------------------
/// Host
// -----------------------------------------------------------------------
// - The device has been disconnected
// JCB to be fix
if(Is_device_disconnection() && Is_host_device_disconnection_interrupt_enabled()) {
TRACE_DEBUG("device disconnect\n\r");
host_disable_all_pipe();
Host_ack_device_disconnection();
device_state=DEVICE_DISCONNECTED;
Usb_send_event(EVT_HOST_DISCONNECTION);
TRACE_INFO("Device disconnected\n\r");
Host_device_disconnection_action();
Clear_all_user_request();
}
// -----------------------------------------------------------------------
/// Host
// -----------------------------------------------------------------------
// - Device connection
if(Is_device_connection() && Is_host_device_connection_interrupt_enabled()) {
TRACE_DEBUG("device connect\n\r");
Host_ack_device_connection();
host_disable_all_pipe();
Host_device_connection_action();
}
// -----------------------------------------------------------------------
/// Host
// -----------------------------------------------------------------------
// - Host Start of frame has been sent
if (Is_host_sof() && Is_host_sof_interrupt_enabled()) {
//TRACE_DEBUG_WP("_"); // host
Host_ack_sof();
Usb_send_event(EVT_HOST_SOF);
private_sof_counter++;
// delay timeout 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 1/4 sec
private_sof_counter=0;
for(i=0;i<MAX_EP_NB;i++) {
if(it_pipe_str[i].enable==ENABLE) {
save_pipe_nb=Host_get_selected_pipe();
Host_select_pipe(i);
if((++it_pipe_str[i].timeout>TIMEOUT_DELAY) && (Host_get_pipe_type()!=TYPE_INTERRUPT)) {
it_pipe_str[i].enable=DISABLE;
it_pipe_str[i].status=PIPE_DELAY_TIMEOUT;
Host_stop_pipe_interrupt(i);
if (is_any_interrupt_pipe_active()==FALSE) { // If no more transfer is armed
if (g_sav_int_sof_enable==FALSE) {
Host_disable_sof_interrupt();
}
}
it_pipe_str[i].handle(PIPE_DELAY_TIMEOUT,it_pipe_str[i].nb_byte_processed);
}
Host_select_pipe(save_pipe_nb);
}
}
}
#endif // (USB_HOST_PIPE_INTERRUPT_TRANSFER==ENABLE) && (TIMEOUT_DELAY_ENABLE==ENABLE))
Host_sof_action();
}
// -----------------------------------------------------------------------
/// Host
// -----------------------------------------------------------------------
// - Host Wake-up has been received
if (Is_host_hwup() && Is_host_hwup_interrupt_enabled()) {
TRACE_DEBUG("Host wake up\n\r");
Host_disable_hwup_interrupt(); // Wake up interrupt should be disable host is now wake up !
Host_disable_remote_wakeup_interrupt();
// CAUTION HWUP can be cleared only when USB clock is active (not frozen)!
Usb_unfreeze_clock(); // Enable clock on USB interface
Host_enable_sof(); // start sending SOF
Host_ack_hwup(); // Clear HWUP interrupt flag
Host_ack_remote_wakeup();
Usb_send_event(EVT_HOST_HWUP); // Send software event
Usb_send_event(EVT_HOST_REMOTE_WAKEUP);
Host_hwup_action(); // Map custom action
if (Is_usb_hnp()) {
Usb_host_reject_hnp();
Usb_disable_hnp_error_interrupt();
Usb_disable_role_exchange_interrupt();
}
Host_send_resume();
}
// -----------------------------------------------------------------------
/// Host
// -----------------------------------------------------------------------
// Remote Wake Up has been received
if (Is_host_remote_wakeup_interrupt_enabled() && Is_host_remote_wakeup()) {
TRACE_DEBUG("Remote wake up\n\r");
Host_disable_remote_wakeup_interrupt();
Host_disable_hwup_interrupt();
Host_ack_remote_wakeup();
Host_ack_hwup(); // Clear HWUP interrupt flag
Usb_unfreeze_clock(); // Enable clock on USB interface
Host_enable_sof(); // start sending SOF
Usb_send_event(EVT_HOST_REMOTE_WAKEUP);
Usb_send_event(EVT_HOST_HWUP); // Send software event
if (Is_usb_hnp()) {
Usb_host_reject_hnp();
Usb_disable_hnp_error_interrupt();
Usb_disable_role_exchange_interrupt();
}
Host_send_resume();
}
}
