The USB task checks the income of new requests from the USB host. When a setup request occurs, this task launches the processing of this setup contained in the usb_standard_request.c file. Other class-specific requests are also processed in this file.
Definition in file usb_device_task.c.
#include "conf_usb.h"
#include "compiler.h"
#include "usb_drv.h"
#include "usb_task.h"
#include "usb_descriptors.h"
#include "usb_standard_request.h"
#include "usb_device_task.h"
Go to the source code of this file.
Functions | |
void | usb_device_task (void) |
Entry point of the USB device mamagement. | |
void | usb_device_task_init (void) |
This function initializes the USB device controller. | |
void | usb_start_device (void) |
This function starts the USB device controller. | |
Variables | |
volatile Bool | usb_connected |
Public : (Bool) usb_connected usb_connected is set to TRUE when VBus has been detected usb_connected is set to FALSE otherwise. |
void usb_device_task | ( | void | ) |
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
Definition at line 169 of file usb_device_task.c.
References usb_connected, usb_start_device(), and Usb_vbus_on_action.
Referenced by usb_device_task_init().
00171 { 00172 #ifdef FREERTOS_USED 00173 portTickType xLastWakeTime; 00174 00175 xLastWakeTime = xTaskGetTickCount(); 00176 while (TRUE) 00177 { 00178 vTaskDelayUntil(&xLastWakeTime, configTSK_USB_DEV_PERIOD); 00179 00180 #endif // FREERTOS_USED 00181 if (!usb_connected && Is_usb_vbus_high()) 00182 { 00183 usb_start_device(); 00184 Usb_send_event(EVT_USB_POWERED); 00185 Usb_vbus_on_action(); 00186 } 00187 00188 if (Is_usb_event(EVT_USB_RESET)) 00189 { 00190 Usb_ack_event(EVT_USB_RESET); 00191 Usb_reset_endpoint(EP_CONTROL); 00192 usb_configuration_nb = 0; 00193 } 00194 00195 // Connection to the device enumeration process 00196 if (Is_usb_setup_received()) 00197 { 00198 usb_process_request(); 00199 } 00200 #ifdef FREERTOS_USED 00201 } 00202 #endif 00203 }
void usb_device_task_init | ( | void | ) |
This function initializes the USB device controller.
This function enables the USB controller and inits 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.
Definition at line 97 of file usb_device_task.c.
References usb_connected, and usb_device_task().
00098 { 00099 usb_connected = FALSE; 00100 usb_configuration_nb = 0; 00102 //Pll_start_auto(); 00103 //Wait_pll_ready(); 00104 Disable_global_interrupt(); 00105 Usb_disable(); 00106 (void)Is_usb_enabled(); 00107 Enable_global_interrupt(); 00108 Usb_disable_otg_pad(); 00109 Usb_enable_otg_pad(); 00110 Usb_enable(); 00111 #if UC3A3 00112 Set_bits(AVR32_USBB_udcon, (3<<10)); // Force Full Speed 00113 # warning Force UC3A3 USB macro to work in Full-Speed. 00114 #endif 00115 Usb_unfreeze_clock(); 00116 (void)Is_usb_clock_frozen(); 00117 Usb_ack_suspend(); // A suspend condition may be detected right after enabling the USB macro 00118 Usb_enable_vbus_interrupt(); 00119 Enable_global_interrupt(); 00120 00121 #ifdef FREERTOS_USED 00122 xTaskCreate(usb_device_task, 00123 configTSK_USB_DEV_NAME, 00124 configTSK_USB_DEV_STACK_SIZE, 00125 NULL, 00126 configTSK_USB_DEV_PRIORITY, 00127 &usb_device_tsk); 00128 #endif // FREERTOS_USED 00129 }
void usb_start_device | ( | void | ) |
This function starts the USB device controller.
This function enables the USB controller and inits 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. Start device function is executed once VBus connection has been detected either by the VBus change interrupt or by the VBus high level.
Definition at line 141 of file usb_device_task.c.
References usb_connected.
Referenced by usb_device_task().
00142 { 00143 Usb_enable_suspend_interrupt(); 00144 Usb_enable_reset_interrupt(); 00145 00146 #if (USB_HIGH_SPEED_SUPPORT==DISABLED) 00147 Usb_force_full_speed_mode(); 00148 #else 00149 Usb_use_dual_speed_mode(); 00150 #endif 00151 00152 usb_init_device(); // Configure the USB controller EP0 00153 Usb_attach(); 00154 usb_connected = TRUE; 00155 }
volatile Bool usb_connected |
Public : (Bool) usb_connected usb_connected is set to TRUE when VBus has been detected usb_connected is set to FALSE otherwise.
Definition at line 80 of file usb_device_task.c.
Referenced by usb_device_task(), usb_device_task_init(), and usb_start_device().