void udd_attach(void)
{
irqflags_t flags;
flags = cpu_irq_save();
// At startup the USB bus state is unknown,
// therefore the state is considered IDLE to not miss any USB event
udd_sleep_mode(true);
otg_unfreeze_clock();
while (!Is_otg_clock_usable());
// Authorize attach if Vbus is present
udd_attach_device();
// Enable USB line events
udd_enable_reset_interrupt();
udd_enable_suspend_interrupt();
udd_enable_wake_up_interrupt();
udd_enable_sof_interrupt();
// Reset following interrupts flag
udd_ack_reset();
udd_ack_sof();
// The first suspend interrupt must be forced
udd_raise_suspend();
udd_ack_wake_up();
otg_freeze_clock();
cpu_irq_restore(flags);
}
void udd_attach(void)
{
irqflags_t flags;
flags = cpu_irq_save();
// At startup the USB bus state is unknown,
// therefore the state is considered IDLE to not miss any USB event
udd_sleep_mode(true);
otg_unfreeze_clock();
// This section of clock check can be improved with a chek of
// USB clock source via sysclk()
#if UC3A3
// For parts with high speed feature, the "USABLE" clock is the UTMI clock,
// and the UTMI clock is disabled in suspend mode. Thereby, the utmi clock
// can't be checked when USB line is not attached or in suspend mode
// But it is not a issue, because the clock source is the OSC
#else
// Check USB clock because the source can be a PLL
while( !Is_clock_usable() );
#endif
// Authorize attach if VBus is present
udd_attach_device();
// (RESET_AND_WAKEUP)
// After the attach and the first USB suspend, the following USB Reset time can be inferior to CPU restart clock time.
// Thus, the USB Reset state is not detected and endpoint control is not allocated
// In this case, a Reset is do automatically after attach.
udc_reset(); // Reset USB Device Stack Core
udd_reset_ep_ctrl(); // Reset endpoint control
udd_ctrl_init(); // Reset endpoint control management
// Enable USB line events
udd_enable_reset_interrupt();
udd_enable_suspend_interrupt();
udd_enable_wake_up_interrupt();
#ifdef UDC_SOF_EVENT
udd_enable_sof_interrupt();
#endif
// Reset following interupts flag
udd_ack_reset();
udd_ack_sof();
// The first suspend interrupt must be forced
#if UC3A3
// With UTMI, the first suspend is detected but must be cleared to reoccur interrupt
udd_ack_suspend();
#else
// The first suspend interrupt is not detected else raise it
udd_raise_suspend();
#endif
udd_ack_wake_up();
otg_freeze_clock();
cpu_irq_restore(flags);
}
void udd_attach(void)
{
irqflags_t flags;
flags = cpu_irq_save();
// At startup the USB bus state is unknown,
// therefore the state is considered IDLE to not miss any USB event
udd_sleep_mode(true);
otg_unfreeze_clock();
while( !Is_otg_clock_usable() );
// Authorize attach if Vbus is present
udd_attach_device();
// Enable USB line events
udd_enable_reset_interrupt();
udd_enable_suspend_interrupt();
udd_enable_wake_up_interrupt();
udd_enable_sof_interrupt();
#ifdef USB_DEVICE_HS_SUPPORT
udd_enable_msof_interrupt();
#endif
// Reset following interrupts flag
udd_ack_reset();
udd_ack_sof();
udd_ack_msof();
// The first suspend interrupt must be forced
#if UC3A3
// With UTMI, the first suspend is detected but must be cleared to reoccur interrupt
udd_ack_suspend();
#else
// The first suspend interrupt is not detected else raise it
udd_raise_suspend();
#endif
udd_ack_wake_up();
otg_freeze_clock();
cpu_irq_restore(flags);
}
