USB low-level driver for dual role features.
Functions | |
void | usb_dual_disable (void) |
Deinitialize the dual role driver. More... | |
bool | usb_dual_enable (void) |
Initialize the USB peripheral and set right role according to ID pin. More... | |
USB ID pin management | |
The ID pin come from the USB connector (A and B receptable) and allows to select the USB mode between host or device. The ID pin can be managed through EIC pin. This feature is optional, and it is enabled if USB_ID_PIN is defined in board.h and CONF_BOARD_USB_ID_DETECT defined in conf_board.h. | |
#define | USB_ID_DETECT (defined(CONF_BOARD_USB_ID_DETECT)) |
#define | USB_ID_EIC (defined(USB_ID_PIN) && USB_ID_DETECT) |
USB Vbus management | |
The VBus line can be monitored through a EIC pin and a basic resistor voltage divider. This feature is optional, and it is enabled if USB_VBUS_PIN is defined in board.h and CONF_BOARD_USB_VBUS_DETECT defined in conf_board.h. | |
#define | USB_VBUS_DETECT (defined(CONF_BOARD_USB_VBUS_DETECT)) |
#define | USB_VBUS_EIC (defined(USB_VBUS_PIN) && USB_VBUS_DETECT) |
#define USB_ID_DETECT (defined(CONF_BOARD_USB_ID_DETECT)) |
#define USB_ID_EIC (defined(USB_ID_PIN) && USB_ID_DETECT) |
#define USB_VBUS_DETECT (defined(CONF_BOARD_USB_VBUS_DETECT)) |
#define USB_VBUS_EIC (defined(USB_VBUS_PIN) && USB_VBUS_DETECT) |
void usb_dual_disable | ( | void | ) |
Deinitialize the dual role driver.
References _initialized, EXTINT_CALLBACK_TYPE_DETECT, extint_chan_disable_callback(), and USB_ID_EIC_LINE.
Referenced by udd_disable().
bool usb_dual_enable | ( | void | ) |
Initialize the USB peripheral and set right role according to ID pin.
true
if the ID pin management has been started, otherwise false
. End of host or device startup, the current mode selected is already started now
References _initialized, _usb_is_id_device, port_config::direction, port_config::input_pull, port_get_config_defaults(), PORT_PIN_DIR_INPUT, PORT_PIN_PULL_UP, port_pin_set_config(), udc_start(), uhc_start, usb_id_config(), and USB_ID_PIN.
Referenced by udd_enable().