void udd_enable(void)
{
irqflags_t flags;
flags = cpu_irq_save();
#if SAMG55
matrix_set_usb_device();
#endif
// Enable USB hardware
udd_enable_periph_ck();
sysclk_enable_usb();
// Cortex, uses NVIC, no need to register IRQ handler
NVIC_SetPriority((IRQn_Type) ID_UDP, UDD_USB_INT_LEVEL);
NVIC_EnableIRQ((IRQn_Type) ID_UDP);
// Reset internal variables
#if (0!=USB_DEVICE_MAX_EP)
udd_ep_job_table_reset();
#endif
// Always authorize asynchronous USB interrupts to exit of sleep mode
pmc_set_fast_startup_input(PMC_FSMR_USBAL);
#ifndef UDD_NO_SLEEP_MGR
// Initialize the sleep mode authorized for the USB suspend mode
udd_b_idle = false;
sleepmgr_lock_mode(UDP_SLEEP_MODE_USB_SUSPEND);
#endif
#if UDD_VBUS_IO
/* Initialize VBus monitor */
udd_vbus_init(udd_vbus_handler);
udd_vbus_monitor_sleep_mode(true);
/* Force Vbus interrupt when Vbus is always high
* This is possible due to a short timing between a Host mode stop/start.
*/
if (Is_udd_vbus_high()) {
udd_vbus_handler(USB_VBUS_PIO_ID, USB_VBUS_PIO_MASK);
}
#else
# ifndef USB_DEVICE_ATTACH_AUTO_DISABLE
udd_attach();
# endif
#endif
cpu_irq_restore(flags);
}
void udd_enable(void)
{
irqflags_t flags;
flags = cpu_irq_save();
#ifdef UHD_ENABLE
// DUAL ROLE INITIALIZATION
if (otg_dual_enable()) {
// The current mode has been started by otg_dual_enable()
cpu_irq_restore(flags);
return;
}
#else
// SINGLE DEVICE MODE INITIALIZATION
sysclk_enable_usb();
pmc_enable_periph_clk(ID_UOTGHS);
// Here, only the device mode is possible, then link UHDP interrupt to UDD interrupt
NVIC_SetPriority((IRQn_Type) ID_UOTGHS, USB_INT_LEVEL);
NVIC_EnableIRQ((IRQn_Type) ID_UOTGHS);
// Always authorize asynchrony USB interrupts to exit of sleep mode
// For SAM USB wake up device except BACKUP mode
pmc_set_fast_startup_input(PMC_FSMR_USBAL);
#endif
#if (OTG_ID_IO) && (defined UHD_ENABLE)
// Check that the device mode is selected by ID pin
if (!Is_otg_id_device()) {
cpu_irq_restore(flags);
return; // Device is not the current mode
}
#else
// ID pin not used and force device mode
otg_force_device_mode();
#endif
// Enable USB hardware
otg_enable();
// Reset internal variables
#if (0!=USB_DEVICE_MAX_EP)
udd_ep_job_table_reset();
#endif
#ifndef UDD_NO_SLEEP_MGR
if (!udd_b_sleep_initialized) {
udd_b_sleep_initialized = true;
// Initialize the sleep mode authorized for the USB suspend mode
udd_b_idle = false;
sleepmgr_lock_mode(UHDP_SLEEP_MODE_USB_SUSPEND);
} else {
udd_sleep_mode(false); // Enter idle mode
}
#endif
#if OTG_VBUS_IO
/* Initialize VBus monitor */
otg_vbus_init(udd_vbus_handler);
udd_vbus_monitor_sleep_mode(true);
/* Force VBus interrupt when VBus is always high
* This is possible due to a short timing between a Host mode stop/start.
*/
if (Is_otg_vbus_high()) {
udd_vbus_handler(USB_VBUS_PIO_ID, USB_VBUS_PIO_MASK);
}
#else
# ifndef USB_DEVICE_ATTACH_AUTO_DISABLE
udd_attach();
# endif
#endif
cpu_irq_restore(flags);
}