void usb_task(void)
{
// ---- DUAL-ROLE DEVICE/HOST USB MODE -----------------------------------------
#if USB_DEVICE_FEATURE == true && USB_HOST_FEATURE == true
// 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:
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 ENABLED -------------------------------------------------
#else
#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;}
// TODO !!! ID pin hot state change
// Preliminary management: HARDWARE RESET !!!
#if ( ID_PIN_CHANGE_GENERATE_RESET == ENABLE)
// Hot ID transition generates wdt reset
if((g_old_usb_mode!=g_usb_mode))
#ifndef AVRGCC
{Wdt_change_16ms(); while(1); LOG_STR_CODE(log_id_change);}
#else
{Wdt_change_enable(); while(1); LOG_STR_CODE(log_id_change);}
#endif
#endif
g_old_usb_mode=g_usb_mode; // Store current usb mode, for mode change detection
// 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_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
// -----------------------------------------------------------------------------
}
//------------------------------------------------------------------------------
/// Entry point of the USB mamnagement
/// Depending on the USB mode supported (HOST/DEVICE/DUAL_ROLE) the function
/// calls the coresponding USB management function
//------------------------------------------------------------------------------
void usb_task(void)
{
// DUAL ROLE DEVICE USB MODE
if(Is_usb_id_device()) {
g_usb_mode = USB_MODE_DEVICE;
}
else {
g_usb_mode = USB_MODE_HOST;
}
g_old_usb_mode = g_usb_mode; // Store current usb mode, for mode change detection
// Depending on current usb mode, launch the correct usb task (device or host)
// Configure OTG timers
Set_otg_custom_timer(VBUSRISE_70MS);
Set_otg_custom_timer(VBUSPULSE_40MS);
Set_otg_custom_timer(VFALLTMOUT_131MS);
Set_otg_custom_timer(SRPMINDET_100US);
switch(g_usb_mode) {
case USB_MODE_DEVICE:
//usb_device_task();
//MSDDriver_StateMachine();
Scheduler_task_3();
break;
case USB_MODE_HOST:
if( pOTGDescriptor->bOTGADevSRPReaction == VBUS_PULSE) {
Usb_select_vbus_srp_method();
}
else {
Usb_select_data_srp_method();
}
usb_host_task();
// Handle Vbus overcurrent error (auto-disabled if not supported or not defined in board driver file)
if (Is_vbus_overcurrent()) {
Otg_print_new_event_message(OTGMSG_VBUS_SURCHARGE,OTG_TEMPO_3SEC);
}
break;
case USB_MODE_UNDEFINED: // No break !
default:
break;
}
Otg_message_task();
}
void cdc_receiving(void) { // return: Anzahl empfangener Bytes im Fifo
int bytes_rx, bytes_left;
#if USB_DEVICE_FEATURE == ENABLED && USB_HOST_FEATURE == ENABLED
usb_task();
#elif USB_DEVICE_FEATURE == ENABLED
usb_device_task();
#elif USB_HOST_FEATURE == ENABLED
usb_host_task();
#endif
if ( usb_connected && Is_usb_out_received(RX_EP) ) {
bytes_rx = Usb_byte_count(RX_EP);
if ((bytes_rx > 0)&&(bytes_rx < cdc_rxleft)) {
bytes_left = CDC_RXBUFFERSIZE-cdc_wrpos;
Usb_reset_endpoint_fifo_access(RX_EP);
if (bytes_rx <= bytes_left) { // Normalfall: kein Wrap
usb_read_ep_rxpacket(RX_EP, (void *)cdc_rxbuffer+cdc_wrpos, bytes_rx, NULL);
} else {
usb_read_ep_rxpacket(RX_EP, (void *)cdc_rxbuffer+cdc_wrpos, bytes_left, NULL);
usb_read_ep_rxpacket(RX_EP, (void *)cdc_rxbuffer, bytes_rx-bytes_left, NULL);
}
cdc_wrpos = (cdc_wrpos+bytes_rx)%CDC_RXBUFFERSIZE;
// End copy in own fifo
cdc_rxidle_pos = cdc_sof_counter + cdc_timeoutval;
cdc_timeout_enabled = (cdc_timeoutval>0)&&(cdc_timeout_fct!=NULL);
} // fi copy received
Usb_ack_out_received_free(RX_EP); // moved outside of if-con
} else if (cdc_timeout_enabled) {
if ((int)(cdc_sof_counter - cdc_rxidle_pos) >= 0) {
cdc_timeout_fct(cdc_rxlen);
cdc_timeout_enabled = FALSE;
}
} // esle fi to
// chain-tx (>64 byte):
if (cdc_txbuffer_len > 0) {
cdc_transmit(cdc_txbuffer, cdc_txbuffer_len);
} // fi
}
/**
* @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
// -----------------------------------------------------------------------------
}
//! @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();
}
}
