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 }
void host_mouse_hid_task(void) #endif { uint8_t i; #ifdef FREERTOS_USED portTickType xLastWakeTime; xLastWakeTime = xTaskGetTickCount(); while (true) { vTaskDelayUntil(&xLastWakeTime, configTSK_USB_HHID_MOUSE_PERIOD); #endif // FREERTOS_USED // First, check the host controller is in full operating mode with the // B-device attached and enumerated if (Is_host_ready()) { // New device connection (executed only once after device connection) if (mouse_hid_new_device_connected) { mouse_hid_new_device_connected = false; // For all supported interfaces for (i = 0; i < Get_nb_supported_interface(); i++) { if(Get_class(i)==HID_CLASS && Get_protocol(i)==MOUSE_PROTOCOL) { host_hid_set_idle(HID_IDLE_DURATION_INDEFINITE, HID_REPORT_ID_ALL, i); host_hid_get_report(HID_REPORT_DESCRIPTOR, 0, i); pipe_mouse_in = Get_ep_pipe(i, 0); Host_enable_continuous_in_mode(pipe_mouse_in); Host_unfreeze_pipe(pipe_mouse_in); mouse_hid_connected=true; break; } } } if( Is_host_mouse_hid_configured() ) { if((Is_host_in_received(pipe_mouse_in)) && (Is_host_stall(pipe_mouse_in)==false) ) { Host_reset_pipe_fifo_access(pipe_mouse_in); usb_report[0]= usb_report[1]= usb_report[2]= usb_report[3]=0; host_read_p_rxpacket(pipe_mouse_in, (void*)usb_report, 4, NULL); Host_ack_in_received(pipe_mouse_in); Host_free_in(pipe_mouse_in); new_x = usb_report[1]; new_y = usb_report[2]; mouse_x += new_x; mouse_y += new_y; if( mouse_x<MOUSE_X_MIN ) mouse_x=MOUSE_X_MIN; else if( mouse_x>MOUSE_X_MAX ) mouse_x=MOUSE_X_MAX; if( mouse_y<MOUSE_Y_MIN ) mouse_y=MOUSE_Y_MIN; else if( mouse_y>MOUSE_Y_MAX ) mouse_y=MOUSE_Y_MAX; mouse_b0=usb_report[0] & 1; mouse_b1=usb_report[0] & 2; mouse_b2=usb_report[0] & 4; disp_led_mouse(); disp_ascii_mouse(); } if(Is_host_nak_received(pipe_mouse_in)) { Host_ack_nak_received(pipe_mouse_in); LED_Off(LED_HOST_MOUSE_B0 ); LED_Off(LED_HOST_MOUSE_B1 ); LED_Off(LED_HOST_MOUSE_B2 ); LED_Off(LED_HOST_MOUSE_B3 ); } } } #ifdef FREERTOS_USED } #endif }
//! //! @brief This function receives nb_data bytes pointed to by ptr_buf on the specified pipe. //! //! *nb_data is updated with the final number of data bytes received. //! //! @note This function activates the host SOF interrupt to detect time-outs. //! The initial enable state of this interrupt will be restored. //! //! @param pipe //! @param nb_data //! @param ptr_buf //! //! @return Status_t: Pipe status //! Status_t host_get_data(uint8_t pipe, uint16_t *nb_data, void *ptr_buf) { Status_t status = PIPE_GOOD; // Frame correctly received by default bool sav_int_sof_enable; bool sav_glob_int_en; uint8_t nak_timeout; uint16_t n, i; #if NAK_TIMEOUT_ENABLE == ENABLE uint16_t cpt_nak; #endif n = *nb_data; sav_int_sof_enable = Is_host_sof_interrupt_enabled(); Host_enable_sof_interrupt(); Host_enable_continuous_in_mode(pipe); Host_configure_pipe_token(pipe, TOKEN_IN); Host_ack_in_received(pipe); while (n) // While missing data... { Host_free_in(pipe); Host_unfreeze_pipe(pipe); private_sof_counter = 0; // Reset the counter in SOF detection subroutine nak_timeout = 0; #if NAK_TIMEOUT_ENABLE == ENABLE cpt_nak = 0; #endif while (!Is_host_in_received(pipe)) { if (Is_host_emergency_exit()) // Asynchronous disconnection or role exchange detected under interrupt { status = PIPE_DELAY_TIMEOUT; Host_reset_pipe(pipe); goto host_get_data_end; } #if TIMEOUT_DELAY_ENABLE == ENABLE if (private_sof_counter >= 250) // Time-out management { private_sof_counter = 0; // Done in host SOF interrupt if (nak_timeout++ >= TIMEOUT_DELAY) // Check for local time-out { status = PIPE_DELAY_TIMEOUT; Host_reset_pipe(pipe); goto host_get_data_end; } } #endif if (Is_host_pipe_error(pipe)) // Error management { status = Host_error_status(pipe); Host_ack_all_errors(pipe); goto host_get_data_end; } if (Is_host_stall(pipe)) // STALL management { status = PIPE_STALL; Host_reset_pipe(pipe); Host_ack_stall(pipe); goto host_get_data_end; } #if NAK_TIMEOUT_ENABLE == ENABLE if (Is_host_nak_received(pipe)) // NAK received { Host_ack_nak_received(pipe); if (cpt_nak++ > NAK_RECEIVE_TIMEOUT) { status = PIPE_NAK_TIMEOUT; Host_reset_pipe(pipe); goto host_get_data_end; } } #endif } Host_freeze_pipe(pipe); Host_reset_pipe_fifo_access(pipe); i = Host_get_pipe_size(pipe) - Host_byte_count(pipe); if (!ptr_buf) { if (Host_byte_count(pipe) > n) // More bytes received than expected { n = 0; //! @todo Error code management } else // Nb bytes received <= expected { n -= Host_byte_count(pipe); if (i) // Short packet { *nb_data -= n; n = 0; } } } else { n = host_read_p_rxpacket(pipe, ptr_buf, n, &ptr_buf); if (Host_byte_count(pipe)) // More bytes received than expected { //! @todo Error code management } else if (i) // Short packet with nb bytes received <= expected { *nb_data -= n; n = 0; } } Host_ack_in_received(pipe); // In low-speed mode, the USB IP may have not yet sent the ACK at this // point. The USB IP does not support a new start of transaction request // from the firmware if the ACK has not been sent. The only means of making // sure the ACK has been sent is to wait for the next Keep-Alive before // starting a new transaction. if (Is_usb_low_speed_mode()) { Usb_ack_event(EVT_HOST_SOF); sav_int_sof_enable = Is_host_sof_interrupt_enabled(); if ((sav_glob_int_en = cpu_irq_is_enabled())) cpu_irq_disable(); Host_ack_sof(); (void)Is_host_sof_interrupt_enabled(); if (sav_glob_int_en) cpu_irq_enable(); Host_enable_sof_interrupt(); while (!Is_usb_event(EVT_HOST_SOF)) // Wait for next Keep-Alive { if (Is_host_emergency_exit()) { status = PIPE_DELAY_TIMEOUT; Host_reset_pipe(pipe); goto host_get_data_end; } } if (!sav_int_sof_enable) // Restore SOF interrupt enable { if ((sav_glob_int_en = cpu_irq_is_enabled())) cpu_irq_disable(); Host_disable_sof_interrupt(); (void)Is_host_sof_interrupt_enabled(); if (sav_glob_int_en) cpu_irq_enable(); } } } host_get_data_end: Host_freeze_pipe(pipe); // Restore SOF interrupt enable state if (!sav_int_sof_enable) { if ((sav_glob_int_en = cpu_irq_is_enabled())) cpu_irq_disable(); Host_disable_sof_interrupt(); (void)Is_host_sof_interrupt_enabled(); if (sav_glob_int_en) cpu_irq_enable(); } // And return... return status; }
//! //! @brief USB pipe interrupt subroutine //! void usb_pipe_interrupt(uint8_t pipe) { void *ptr_buf; uint16_t n, i; bool callback = false; // Detect which events generate an interrupt... if (Is_host_pipe_error(pipe)) // Error management { it_pipe_str[pipe].status = Host_error_status(pipe); it_pipe_str[pipe].enable = false; Host_reset_pipe(pipe); Host_ack_all_errors(pipe); callback = true; goto usb_pipe_interrupt_end; } if (Is_host_stall(pipe)) // STALL management { it_pipe_str[pipe].status = PIPE_STALL; it_pipe_str[pipe].enable = false; Host_reset_pipe(pipe); callback = true; goto usb_pipe_interrupt_end; } #if NAK_TIMEOUT_ENABLE == ENABLE if (Is_host_nak_received(pipe)) // NAK received { Host_ack_nak_received(pipe); // Check if NAK time-out error occurs (not for interrupt pipes) if (!--it_pipe_str[pipe].nak_timeout && Host_get_pipe_type(pipe) != TYPE_INTERRUPT) { it_pipe_str[pipe].status = PIPE_NAK_TIMEOUT; it_pipe_str[pipe].enable = false; Host_reset_pipe(pipe); callback = true; goto usb_pipe_interrupt_end; } } #endif if (Is_host_in_received(pipe)) // Pipe IN reception? { ptr_buf = (uint8_t *)it_pipe_str[pipe].ptr_buf + it_pipe_str[pipe].nb_byte_processed; // Build pointer to data buffer n = it_pipe_str[pipe].nb_byte_to_process - it_pipe_str[pipe].nb_byte_processed; // Remaining data bytes Host_freeze_pipe(pipe); Host_reset_pipe_fifo_access(pipe); i = Host_get_pipe_size(pipe) - Host_byte_count(pipe); n = host_read_p_rxpacket(pipe, ptr_buf, n, NULL); it_pipe_str[pipe].nb_byte_processed = it_pipe_str[pipe].nb_byte_to_process - n; if (Host_byte_count(pipe)) // More bytes received than expected { //! @todo Error code management } else if (i) // Short packet with nb bytes received <= expected { n = 0; } Host_ack_in_received(pipe); if (n) // Still data to process { Host_free_in(pipe); Host_unfreeze_pipe(pipe); // Request another IN transfer private_sof_counter = 0; // Reset the counter in SOF detection subroutine it_pipe_str[pipe].timeout = 0; // Reset time-out it_pipe_str[pipe].nak_timeout = NAK_RECEIVE_TIMEOUT; } else // End of transfer { it_pipe_str[pipe].enable = false; it_pipe_str[pipe].status = PIPE_GOOD; Host_reset_pipe(pipe); callback = true; } } if (Is_host_out_ready(pipe)) // Pipe OUT sent? { Host_ack_out_ready(pipe); it_pipe_str[pipe].nb_byte_processed += it_pipe_str[pipe].nb_byte_on_going; it_pipe_str[pipe].nb_byte_on_going = 0; ptr_buf = (uint8_t *)it_pipe_str[pipe].ptr_buf + it_pipe_str[pipe].nb_byte_processed; // Build pointer to data buffer n = it_pipe_str[pipe].nb_byte_to_process - it_pipe_str[pipe].nb_byte_processed; // Remaining data bytes if (n) // Still data to process { Host_unfreeze_pipe(pipe); // Prepare data to be sent Host_reset_pipe_fifo_access(pipe); it_pipe_str[pipe].nb_byte_on_going = n - host_write_p_txpacket(pipe, ptr_buf, n, NULL); private_sof_counter = 0; // Reset the counter in SOF detection subroutine it_pipe_str[pipe].timeout = 0; // Refresh time-out counter it_pipe_str[pipe].nak_timeout = NAK_SEND_TIMEOUT; Host_send_out(pipe); // Send the USB frame } else // End of transfer { it_pipe_str[pipe].enable = false; // Transfer end it_pipe_str[pipe].status = PIPE_GOOD; // Status OK Host_reset_pipe(pipe); callback = true; } } usb_pipe_interrupt_end: if (!is_any_interrupt_pipe_active() && !g_sav_int_sof_enable) // If no more transfer is armed { Host_disable_sof_interrupt(); } if (callback) // Any call-back function to perform? { it_pipe_str[pipe].handler(it_pipe_str[pipe].status, it_pipe_str[pipe].nb_byte_processed); } }
/** * @brief This function receives nb_data pointed with *buf with the pipe number specified * * The nb_data parameter is passed as a U16 pointer, thus the data pointed by this pointer * is updated with the final number of data byte received. * * @param pipe * @param nb_data * @param buf * * @return status */ U8 host_get_data(U8 pipe, U16 *nb_data, U8 *buf) { U8 status=PIPE_GOOD; U8 sav_int_sof_enable; U8 nak_timeout; U16 n,i; U16 cpt_nak; #if (USER_PERIODIC_PIPE==ENABLE) freeze_user_periodic_pipe(); #endif n=*nb_data; *nb_data=0; sav_int_sof_enable=Is_host_sof_interrupt_enabled(); Host_enable_sof_interrupt(); Host_select_pipe(pipe); Host_continuous_in_mode(); Host_set_token_in(); Host_ack_in_received(); while (n) // While missing data... { Host_unfreeze_pipe(); Host_send_in(); private_sof_counter=0; // Reset the counter in SOF detection sub-routine nak_timeout=0; cpt_nak=0; while (!Is_host_in_received()) { if (Is_host_emergency_exit()) // Async disconnection or role change detected under interrupt { status=PIPE_DELAY_TIMEOUT; Host_reset_pipe(pipe); goto host_get_data_end; } #if (TIMEOUT_DELAY_ENABLE==ENABLE) if (private_sof_counter>=250) // Timeout management { private_sof_counter=0; // Done in host SOF interrupt if (nak_timeout++>=TIMEOUT_DELAY)// Check for local timeout { status=PIPE_DELAY_TIMEOUT; Host_reset_pipe(pipe); goto host_get_data_end; } } #endif if(Is_host_pipe_error()) // Error management { status = Host_error_status(); Host_ack_all_errors(); goto host_get_data_end; } if(Is_host_stall()) // STALL management { if( Is_host_in_received() ) break; status =PIPE_STALL; Host_reset_pipe(pipe); Host_ack_stall(); goto host_get_data_end; } #if (NAK_TIMEOUT_ENABLE==ENABLE) if(Is_host_nak_received()) //NAK received { Host_ack_nak_received(); if (cpt_nak++>NAK_RECEIVE_TIMEOUT) { status = PIPE_NAK_TIMEOUT; Host_reset_pipe(pipe); goto host_get_data_end; } } #endif } status=PIPE_GOOD; Host_freeze_pipe(); if (Host_byte_counter()<=n) { if ((Host_byte_counter() < n)&&(Host_byte_counter()<Host_get_pipe_length())) { n=0;} else { n-=Host_byte_counter();} (*nb_data)+=Host_byte_counter(); // Update nb of byte received if( NULL != buf ) { for (i=Host_byte_counter();i;i--) { *buf=Host_read_byte(); buf++;} } } else // more bytes received than expected { // TODO error code management *nb_data+=n; if( NULL != buf ) { for (i=n;i;i--) // Byte number limited to the initial request (limit tab over pb) { *buf=Host_read_byte(); buf++; } } n=0; } Host_ack_in_received(); } Host_freeze_pipe(); host_get_data_end: if (sav_int_sof_enable==FALSE) { Host_disable_sof_interrupt(); } #if (USER_PERIODIC_PIPE==ENABLE) unfreeze_user_periodic_pipe(); #endif return ((U8)status); }
/** * @brief Entry point of the USB host management * * The aim is to manage the device target connection and enumeration * depending on the device_state, the function performs the required operations * to get the device enumerated and configured * Once the device is operationnal, the device_state value is DEVICE_READY * This state should be tested by the host task application before performing * any applicative requests to the device. * * @param none * * @return none * * \image html host_task.gif */ void usb_host_task(void) { switch (device_state) { //------------------------------------------------------ // DEVICE_UNATTACHED state // // - Default init state // - Try to give device power supply // case DEVICE_UNATTACHED: Host_clear_device_supported(); // Reset Device status Host_clear_configured(); Host_clear_device_ready(); Usb_clear_all_event(); // Clear all software events new_device_connected=FALSE; selected_device=0; #if (USB_HUB_SUPPORT==ENABLE) nb_hub_present = 0; #endif #if (SOFTWARE_VBUS_CTRL==ENABLE) if( Is_usb_bconnection_error_interrupt()||Is_usb_vbus_error_interrupt()) { Usb_ack_bconnection_error_interrupt(); Usb_ack_vbus_error_interrupt(); Host_clear_vbus_request(); } Usb_disable_vbus_pad(); Usb_enable_manual_vbus(); if(Is_usb_srp_interrupt()) { Usb_ack_srp_interrupt(); Usb_enable_vbus_pad(); Usb_enable_vbus(); device_state=DEVICE_ATTACHED; } #else Usb_enable_vbus(); // Give at least device power supply!!! if(Is_usb_vbus_high()) { device_state=DEVICE_ATTACHED; } // If VBUS ok goto to device connection expectation #endif break; //------------------------------------------------------ // DEVICE_ATTACHED state // // - Vbus is on // - Try to detected device connection // case DEVICE_ATTACHED : if (Is_device_connection() || (force_enumeration==TRUE)) // Device pull-up detected { Host_ack_device_connection(); Host_clear_device_supported(); // Reset Device status Host_clear_configured(); Host_clear_device_ready(); Usb_clear_all_event(); // Clear all software events new_device_connected=FALSE; force_enumeration=FALSE; // Now device is connected, enable disconnection interrupt Host_enable_device_disconnection_interrupt(); Enable_interrupt(); // Reset device status Host_clear_device_supported(); Host_clear_configured(); Host_clear_device_ready(); Host_enable_sof(); // Start Start Of Frame generation Host_enable_sof_interrupt(); // SOF will be detected under interrupt c = 0; while (c<100) // wait 100ms before USB reset { if (Is_usb_event(EVT_HOST_SOF)) { Usb_ack_event(EVT_HOST_SOF); c++; }// Count Start Of frame if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) {goto device_attached_error;} } Host_disable_device_disconnection_interrupt(); Host_send_reset(); // First USB reset Usb_ack_event(EVT_HOST_SOF); while (Is_host_reset()); // Active wait of end of reset send Host_ack_reset(); //Workaround for some bugly devices with powerless pull up //usually low speed where data line rise slowly and can be interpretaded as disconnection for(c=0;c!=0xFFFF;c++) // Basic Timeout counter { if(Is_usb_event(EVT_HOST_SOF)) //If we detect SOF, device is still alive and connected, just clear false disconnect flag { if(Is_device_disconnection()) { Host_ack_device_connection(); Host_ack_device_disconnection(); break; } } } Host_enable_device_disconnection_interrupt(); // All USB pipes must be reconfigured after a USB reset generation host_configure_pipe(PIPE_CONTROL, \ TYPE_CONTROL, \ TOKEN_SETUP, \ EP_CONTROL, \ SIZE_64, \ ONE_BANK, \ 0 ); c = 0; while (c<100) // wait 100ms after USB reset { if (Is_usb_event(EVT_HOST_SOF)) { Usb_ack_event(EVT_HOST_SOF); c++; }// Count Start Of frame if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) {goto device_attached_error;} } device_state = DEVICE_POWERED; c=0; } device_attached_error: // Device connection error, or vbus pb -> Retry the connection process from the begining if( Is_usb_bconnection_error_interrupt()||Is_usb_vbus_error_interrupt()||Is_usb_vbus_low()) { Usb_ack_bconnection_error_interrupt(); Usb_enable_vbus_hw_control(); device_state=DEVICE_UNATTACHED; Usb_disable_vbus(); Usb_disable_vbus_pad(); Usb_enable_vbus_pad(); Usb_ack_vbus_error_interrupt(); Usb_enable_vbus(); Usb_disable_vbus_hw_control(); Host_disable_sof(); } break; //------------------------------------------------------ // DEVICE_POWERED state // // - Device connection (attach) as been detected, // - Wait 100ms and configure default control pipe // case DEVICE_POWERED : LOG_STR_CODE(log_device_connected); Host_device_connection_action(); if (Is_usb_event(EVT_HOST_SOF)) { Usb_ack_event(EVT_HOST_SOF); if (c++ >= 100) // Wait 100ms { device_state = DEVICE_DEFAULT; } } break; //------------------------------------------------------ // DEVICE_DEFAULT state // // - Get device descriptor // - Reconfigure Pipe 0 according to Device EP0 // - Attribute device address // case DEVICE_DEFAULT : // Get first device descriptor Host_select_device(0); usb_tree.device[0].ep_ctrl_size=8; if( CONTROL_GOOD == host_get_device_descriptor_uncomplete()) { c = 0; while(c<20) // wait 20ms before USB reset (special buggly devices...) { if (Is_usb_event(EVT_HOST_SOF)) { Usb_ack_event(EVT_HOST_SOF); c++; } if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) {break;} } Host_disable_device_disconnection_interrupt(); Host_send_reset(); // First USB reset Usb_ack_event(EVT_HOST_SOF); while (Is_host_reset()); // Active wait of end of reset send Host_ack_reset(); //Workaround for some bugly devices with powerless pull up //usually low speed where data line rise slowly and can be interpretaded as disconnection for(c=0;c!=0xFFFF;c++) // Basic Timeout counter { if(Is_usb_event(EVT_HOST_SOF)) //If we detect SOF, device is still alive and connected, just clear false disconnect flag { if(Is_device_disconnection()) { Host_ack_device_connection(); Host_ack_device_disconnection(); break; } } } Host_enable_device_disconnection_interrupt(); c = 0; host_configure_pipe(PIPE_CONTROL, \ TYPE_CONTROL, \ TOKEN_SETUP, \ EP_CONTROL, \ SIZE_64, \ ONE_BANK, \ 0 ); while(c<200) // wait 200ms after USB reset { if (Is_usb_event(EVT_HOST_SOF)) { Usb_ack_event(EVT_HOST_SOF); c++; } if (Is_host_emergency_exit() || Is_usb_bconnection_error_interrupt()) {break;} } usb_tree.device[0].ep_ctrl_size=data_stage[OFFSET_FIELD_MAXPACKETSIZE]; // Give an absolute device address host_set_address(DEVICE_BASE_ADDRESS); usb_tree.device[0].device_address=DEVICE_BASE_ADDRESS; device_state = DEVICE_ADDRESSED; } else { device_state = DEVICE_ERROR; } break; //------------------------------------------------------ // DEVICE_BASE_ADDRESSED state // // - Check if VID PID is in supported list // case DEVICE_ADDRESSED : if (CONTROL_GOOD == host_get_device_descriptor()) { // Detect if the device connected belongs to the supported devices table if (HOST_TRUE == host_check_VID_PID()) { Host_set_device_supported(); Host_device_supported_action(); device_state = DEVICE_CONFIGURED; } else { #if (HOST_STRICT_VID_PID_TABLE==ENABLE) Host_device_not_supported_action(); device_state = DEVICE_ERROR; #else device_state = DEVICE_CONFIGURED; #endif } } else // Can not get device descriptor { device_state = DEVICE_ERROR; } break; //------------------------------------------------------ // DEVICE_CONFIGURED state // // - Configure pipes for the supported interface // - Send Set_configuration() request // - Goto full operating mode (device ready) // case DEVICE_CONFIGURED : if (CONTROL_GOOD == host_get_configuration_descriptor()) { if (HOST_FALSE != host_check_class()) // Class support OK? { usb_tree.nb_device++; #if (HOST_AUTO_CFG_ENDPOINT==ENABLE) if(host_auto_configure_endpoint()) #else Host_set_configured(); // Assumes config is OK with user config if(User_configure_endpoint()) // User call here instead of autoconfig #endif { if (CONTROL_GOOD== host_set_configuration(1)) // Send Set_configuration { //host_set_interface(interface_bound,interface_bound_alt_set); // device and host are now fully configured // goto DEVICE READY normal operation device_state = DEVICE_READY; Host_set_device_ready(); // monitor device disconnection under interrupt Host_enable_device_disconnection_interrupt(); // If user host application requires SOF interrupt event // Keep SOF interrupt enable otherwize, disable this interrupt #if (HOST_CONTINUOUS_SOF_INTERRUPT==DISABLE && USB_HUB_SUPPORT==DISABLE) Host_disable_sof_interrupt(); #endif #if (USB_HUB_SUPPORT==ENABLE) // Check if the connected device is a hub if(Get_class(0)==HUB_CLASS && Get_subclass(0)==0x00 && Get_protocol(0)==0x00) { // Get hub descriptor if( Get_hub_descriptor()==CONTROL_GOOD) { // Power each port of the hub i=data_stage[NB_PORT_OFFSET]; for(c=1;c<=i;c++) { Set_port_feature(PORT_POWER,c); } nb_hub_present = 1; hub_device_address[0]=DEVICE_BASE_ADDRESS; hub_init(nb_hub_present-1); } } else { nb_hub_present = 0; new_device_connected=TRUE; } #else new_device_connected=TRUE; #endif Enable_interrupt(); LOG_STR_CODE(log_device_enumerated); } else// Problem during Set_configuration request... { device_state = DEVICE_ERROR; } } } else // device class not supported... { device_state = DEVICE_ERROR; LOG_STR_CODE(log_device_unsupported); Host_device_class_not_supported_action(); } } else // Can not get configuration descriptors... { device_state = DEVICE_ERROR; } break; //------------------------------------------------------ // DEVICE_READY state // // - Full std operatinf mode // - Nothing to do... // case DEVICE_READY: // Host full std operating mode! new_device_connected=FALSE; #if (USB_HUB_SUPPORT==ENABLE) f_hub_port_disconnect=FALSE; // If one hub is present in the USB tree and the period interval // for the interrupt hub endpoint occurs if(nb_hub_present && hub_interrupt_sof==0) { saved_device=selected_device; // Backup user selected device for(j=1;j<=nb_hub_present;j++) { for(i=0;i<MAX_DEVICE_IN_USB_TREE;i++) { if(usb_tree.device[i].device_address==hub_device_address[j-1]) break; } Host_select_device(i); Host_select_pipe(usb_tree.device[i].interface[0].ep[0].pipe_number); Host_ack_nak_received(); Host_ack_in_received(); Host_unfreeze_pipe(); Host_send_in(); while(1) { if(Is_host_nak_received()) break; if(Is_host_emergency_exit()) break; if(Is_host_in_received()) break; } Host_freeze_pipe(); if(Is_host_nak_received()) { Host_ack_nak_received(); } if(Is_host_in_received()) { if(Is_host_stall()==FALSE) { c=Host_read_byte(); } Host_ack_in_received(); hub_manage_port_change_status(c,j); } } // for all hub Host_select_device(saved_device); // Restore user selected device #if (USER_PERIODIC_PIPE==ENABLE) unfreeze_user_periodic_pipe(); #endif } #endif 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_CODE(log_going_to_suspend); c = Is_host_sof_interrupt_enabled(); //Save current sof interrupt enable state Host_disable_sof_interrupt(); Host_ack_sof(); Host_disable_sof(); // Stop start of frame 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) Usb_freeze_clock(); Stop_pll(); Host_suspend_action(); // Custom action here! (for example 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 wakeup, but an host application request { Host_disable_hwup_interrupt(); // Wake up interrupt should be disable host is now wake up ! // CAUTION HWUP can be cleared only when USB clock is active Pll_start_auto(); // First Restart the PLL for USB operation Wait_pll_ready(); // Get sure pll is lock Usb_unfreeze_clock(); // Enable clock on USB interface Host_ack_hwup(); // Clear HWUP interrupt flag } Host_enable_sof(); Host_send_resume(); // Send down stream resume while (Is_host_down_stream_resume()==FALSE); // Wait Down stream resume sent Host_ack_remote_wakeup(); // Ack remote wake-up reception Host_ack_request_resume(); // Ack software request Host_ack_down_stream_resume(); // Ack down stream resume sent Usb_ack_event(EVT_HOST_HWUP); // Ack software event if(c) { Host_enable_sof_interrupt(); } // Restore SOF interrupt enable state before suspend device_state=DEVICE_READY; // Come back to full operating mode LOG_STR_CODE(log_usb_resumed); } break; //------------------------------------------------------ // DEVICE_DISCONNECTED state // // - Device disconnection has been detected // - Run scheduler in this state at least two times to get sure event is detected by all host application tasks // - Go to DEVICE_DISCONNECTED_ACK state before DEVICE_UNATTACHED, to get sure scheduler calls all app tasks... // case DEVICE_DISCONNECTED : device_state = DEVICE_DISCONNECTED_ACK; break; //------------------------------------------------------ // DEVICE_DISCONNECTED_ACK state // // - Device disconnection has been detected and managed bu applicatives tasks // - Go to DEVICE_UNATTACHED state // case DEVICE_DISCONNECTED_ACK : device_state = DEVICE_UNATTACHED; break; //------------------------------------------------------ // default state // // - Default case: ERROR // - Goto no device state // default : device_state = DEVICE_UNATTACHED; break; } }
__interrupt void usb_pipe_interrupt() #endif { U8 pipe_nb; U8 *ptr_buf; void (*fct_handle)(U8 status,U16 nb_byte); U16 n; U8 i; U8 do_call_back=FALSE; pipe_nb_save = Host_get_selected_pipe(); // Important! Save here working pipe number pipe_nb=usb_get_nb_pipe_interrupt(); // work with the correct pipe number that generates the interrupt Host_select_pipe(pipe_nb); // Select this pipe fct_handle=*(it_pipe_str[pipe_nb].handle); // Now try to detect what event generate an interrupt... if (Is_host_pipe_error()) // Any error ? { it_pipe_str[pipe_nb].status = Host_error_status(); it_pipe_str[pipe_nb].enable=DISABLE; Host_stop_pipe_interrupt(pipe_nb); Host_ack_all_errors(); do_call_back=TRUE; goto usb_pipe_interrupt_end; } if (Is_host_stall()) // Stall handshake received ? { it_pipe_str[pipe_nb].status=PIPE_STALL; it_pipe_str[pipe_nb].enable=DISABLE; Host_stop_pipe_interrupt(pipe_nb); do_call_back=TRUE; goto usb_pipe_interrupt_end; } #if (NAK_TIMEOUT_ENABLE==ENABLE) if (Is_host_nak_received()) // NAK ? { Host_ack_nak_received(); // check if number of NAK timeout error occurs (not for interrupt type pipe) if((--it_pipe_str[pipe_nb].nak_timeout==0) && (Host_get_pipe_type()!=TYPE_INTERRUPT)) { it_pipe_str[pipe_nb].status=PIPE_NAK_TIMEOUT; it_pipe_str[pipe_nb].enable=DISABLE; Host_stop_pipe_interrupt(pipe_nb); do_call_back=TRUE; goto usb_pipe_interrupt_end; } } #endif if (Is_host_in_received()) // Pipe IN reception ? { ptr_buf=it_pipe_str[pipe_nb].ptr_buf+it_pipe_str[pipe_nb].nb_byte_processed; // Build pointer to data buffer n=it_pipe_str[pipe_nb].nb_byte_to_process-it_pipe_str[pipe_nb].nb_byte_processed; // Remaining data bytes Host_freeze_pipe(); if (Host_byte_counter()<=n) { if ((Host_byte_counter() < n)&&(Host_byte_counter()<Host_get_pipe_length())) //Received less than remaining, but less than pipe capacity //TODO: error code { n=0; } else { n-=Host_byte_counter(); } it_pipe_str[pipe_nb].nb_byte_processed+=Host_byte_counter(); // Update nb of byte received for (i=Host_byte_counter();i;i--) { *ptr_buf=Host_read_byte(); ptr_buf++;} } else // more bytes received than expected { // TODO error code management it_pipe_str[pipe_nb].nb_byte_processed+=n; for (i=n;i;i--) // Byte number limited to the initial request (limit tab over pb) { *ptr_buf=Host_read_byte(); ptr_buf++;} n=0; } Host_ack_in_received(); if(n>0) //still something to process { Host_unfreeze_pipe(); // Request another IN transfer Host_send_in(); private_sof_counter=0; // Reset the counter in SOF detection sub-routine it_pipe_str[pipe_nb].timeout=0; // Reset timeout it_pipe_str[pipe_nb].nak_timeout=NAK_RECEIVE_TIMEOUT; } else //end of transfer { it_pipe_str[pipe_nb].enable=DISABLE; it_pipe_str[pipe_nb].status=PIPE_GOOD; Host_stop_pipe_interrupt(pipe_nb); do_call_back=TRUE; } } if(Is_host_out_sent()) // Pipe OUT sent ? { Host_ack_out_sent(); it_pipe_str[pipe_nb].nb_byte_processed+=it_pipe_str[pipe_nb].nb_byte_on_going; it_pipe_str[pipe_nb].nb_byte_on_going=0; ptr_buf=it_pipe_str[pipe_nb].ptr_buf+it_pipe_str[pipe_nb].nb_byte_processed; // Build pointer to data buffer n=it_pipe_str[pipe_nb].nb_byte_to_process-it_pipe_str[pipe_nb].nb_byte_processed; // Remaining data bytes if(n>0) // Still data to process... { Host_unfreeze_pipe(); // Prepare data to be sent i = Host_get_pipe_length(); if ( i > n) // Pipe size> remaining data { i = n; n = 0; } else // Pipe size < remaining data { n -= i; } it_pipe_str[pipe_nb].nb_byte_on_going+=i; // Update nb data processed while (i!=0) // Load Pipe buffer { Host_write_byte(*ptr_buf++); i--; } private_sof_counter=0; // Reset the counter in SOF detection sub-routine it_pipe_str[pipe_nb].timeout=0; // Refresh timeout counter it_pipe_str[pipe_nb].nak_timeout=NAK_SEND_TIMEOUT; Host_send_out(); // Send the USB frame } else //n==0 Transfer is finished { it_pipe_str[pipe_nb].enable=DISABLE; // Tranfer end it_pipe_str[pipe_nb].status=PIPE_GOOD; // Status OK Host_stop_pipe_interrupt(pipe_nb); do_call_back=TRUE; } } usb_pipe_interrupt_end: Host_select_pipe(pipe_nb_save); // Restore pipe number !!!! if (is_any_interrupt_pipe_active()==FALSE) // If no more transfer is armed { if (g_sav_int_sof_enable==FALSE) { Host_disable_sof_interrupt(); } } if(do_call_back) // Any callback functions to perform ? { fct_handle(it_pipe_str[pipe_nb].status,it_pipe_str[pipe_nb].nb_byte_processed); } }