usb_task.c File Reference

#include "compiler.h"
#include "intc.h"
#include "conf_usb.h"
#include "usb_drv.h"
#include "usb_task.h"
#include "usb_descriptors.h"
#include "usb_device_task.h"
#include "pm.h"

Functions
static void	usb_general_interrupt (void)
	USB interrupt routine. More...
void	usb_suspend_action (void)
void	usb_task (void)
	Entry point of the USB management. More...
void	usb_task_init (void)
	This function initializes the USB process. More...

Variables
volatile U16	g_usb_event = 0
	Public: U16 g_usb_event usb_connected is used to store USB events detected upon USB general interrupt subroutine Its value is managed by the following macros (See usb_task.h file) Usb_send_event(x) Usb_ack_event(x) Is_usb_event(x) Usb_clear_all_event() More...
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 Used with USB_DEVICE_FEATURE == true only. More...

static void usb_general_interrupt ( void  )

static

USB interrupt routine.

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

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
• Pipe events

For each event, the user can launch an action by completing the associated #define (see the conf_usb.h file to add actions on events).

Note: Only interrupt events that are enabled are processed.

Warning: If device and host tasks are not tasks in an RTOS, rough events like ID transition, VBus transition, device disconnection, etc. that need to kill then restart these tasks may lead to an undefined state if they occur just before something is activated in the USB macro (e.g. pipe/endpoint transfer...).

Returns

Nothing in the standalone configuration; a boolean indicating whether a task switch is required in the FreeRTOS configuration

References EVT_HOST_DISCONNECTION, EVT_HOST_HWUP, EVT_HOST_SOF, EVT_USB_DEVICE_FUNCTION, EVT_USB_HOST_FUNCTION, EVT_USB_POWERED, EVT_USB_RESET, EVT_USB_RESUME, EVT_USB_SUSPEND, EVT_USB_UNPOWERED, EVT_USB_WAKE_UP, g_usb_mode, Host_ack_device_connection, Host_ack_device_disconnection, Host_ack_hwup, Host_ack_sof, Host_disable_hwup_interrupt, Host_disable_sof_interrupt, Host_get_interrupt_pipe_number, Host_get_pipe_type, Host_reset_pipe, Is_host_device_connection, Is_host_device_connection_interrupt_enabled, Is_host_device_disconnection, Is_host_device_disconnection_interrupt_enabled, Is_host_hwup, Is_host_hwup_interrupt_enabled, Is_host_sof, Is_host_sof_interrupt_enabled, Is_usb_clock_frozen, Is_usb_device, Is_usb_full_speed_mode, Is_usb_id_device, Is_usb_id_interrupt_enabled, Is_usb_id_transition, Is_usb_reset, Is_usb_reset_interrupt_enabled, Is_usb_resume, Is_usb_resume_interrupt_enabled, Is_usb_sof, Is_usb_sof_interrupt_enabled, Is_usb_suspend, Is_usb_suspend_interrupt_enabled, Is_usb_vbus_high, Is_usb_vbus_interrupt_enabled, Is_usb_vbus_transition, Is_usb_wake_up, Is_usb_wake_up_interrupt_enabled, LOG_STR, MAX_PEP_NB, TYPE_INTERRUPT, Usb_ack_id_transition, Usb_ack_reset, Usb_ack_resume, Usb_ack_sof, Usb_ack_suspend, Usb_ack_vbus_transition, Usb_ack_wake_up, usb_configuration_nb, usb_connected, Usb_detach, Usb_disable, Usb_disable_otg_pad, Usb_disable_resume_interrupt, Usb_disable_wake_up_interrupt, Usb_enable_wake_up_interrupt, Usb_freeze_clock, usb_init_device(), USB_MODE_DEVICE, USB_MODE_HOST, Usb_reset_action, Usb_resume_action, Usb_send_event, Usb_sof_action, usb_start_device(), Usb_suspend_action, Usb_unfreeze_clock, Usb_vbus_off_action, Usb_vbus_on_action, and Usb_wake_up_action.

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 Used with USB_DEVICE_FEATURE == true only.

Public: bool usb_connected usb_connected is set to true when VBus has been detected usb_connected is set to false otherwise Used with USB_DEVICE_FEATURE == true only.

Referenced by usb_device_task(), usb_device_task_init(), usb_general_interrupt(), and usb_start_device().