//! \brief Reset and initialize USB OTG peripheral to specified speed mode
static void main_otg_init(void)
{
otg_disable();
delay_ms(10);
otg_enable();
otg_disable_id_pin();
otg_force_device_mode();
otg_enable_pad();
otg_enable();
switch (speed) {
// LS speed
case 0:
udd_low_speed_enable();
udd_high_speed_disable();
break;
// FS speed
case 1:
udd_low_speed_disable();
udd_high_speed_disable();
break;
// HS speed
case 2:
udd_low_speed_disable();
udd_high_speed_enable();
break;
default:
Assert(false);
break;
}
otg_unfreeze_clock();
(void)Is_otg_clock_frozen();
}
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();
// Here, only the device mode is possible, then link USBB interrupt to UDD interrupt
irq_register_handler(
#ifdef FREERTOS_USED
(__int_handler)
#endif
udd_interrupt, AVR32_USBB_IRQ, UDD_USB_INT_LEVEL);
// Always authorize asynchronous USB interrupts to exit of sleep mode
pm_asyn_wake_up_enable(AVR32_PM_AWEN_USB_WAKEN_MASK);
#endif
# if (defined USB_ID) && (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 then force device mode
otg_disable_id_pin();
otg_force_device_mode();
# endif
// Enable USB hardware
otg_enable_pad();
otg_enable();
otg_unfreeze_clock();
(void)Is_otg_clock_frozen();
// Reset internal variables
#if (0!=USB_DEVICE_MAX_EP)
udd_ep_job_table_reset();
#endif
// Set the USB speed requested by configuration file
#ifdef USB_DEVICE_LOW_SPEED
udd_low_speed_enable();
#else
udd_low_speed_disable();
# ifdef USB_DEVICE_HS_SUPPORT
udd_high_speed_enable();
# else
udd_high_speed_disable();
# endif
#endif
otg_ack_vbus_transition();
// Force Vbus interrupt in case of Vbus always with a high level
// This is possible with a short timing between a Host mode stop/start.
if (Is_otg_vbus_high()) {
otg_raise_vbus_transition();
}
otg_enable_vbus_interrupt();
otg_freeze_clock();
#ifndef UDD_NO_SLEEP_MGR
// Initialize the sleep mode authorized for the USB suspend mode
udd_b_idle = false;
sleepmgr_lock_mode(USBB_SLEEP_MODE_USB_SUSPEND);
#endif
cpu_irq_restore(flags);
}
void udd_enable(void)
{
irqflags_t flags;
sysclk_enable_usb();
flags = cpu_irq_save();
//** Enable USB hardware
otg_disable();
(void)Is_otg_enabled();
#ifdef OTG
// Check UID pin state before enter in USB device mode
if (!Is_otg_id_device())
return FALSE;
#else
// Here, only the Device mode is possible, then link USBB interrupt to UDD interrupt
irq_register_handler(udd_interrupt, AVR32_USBB_IRQ, UDD_USB_INT_LEVEL);
otg_force_device_mode();
#endif
otg_disable_pad();
otg_enable_pad();
otg_enable();
otg_unfreeze_clock();
(void)Is_otg_clock_frozen();
#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
#else
// Check USB clock
while( !Is_clock_usable() );
#endif
// Reset internal variables
#if (0!=USB_DEVICE_MAX_EP)
udd_ep_job_table_reset();
#endif
// Set the USB speed requested by configuration file
#ifdef USB_DEVICE_LOW_SPEED
udd_low_speed_enable();
#else
udd_low_speed_disable();
# ifdef USB_DEVICE_HS_SUPPORT
udd_high_speed_enable();
# else
udd_high_speed_disable();
# endif
#endif
udd_enable_vbus_interrupt();
otg_freeze_clock();
// Always authorize asynchrone USB interrupts to exit of sleep mode
AVR32_PM.AWEN.usb_waken = 1;
#ifndef UDD_NO_SLEEP_MGR
// Initialize the sleep mode authorized for the USB suspend mode
udd_b_idle = false;
sleepmgr_lock_mode(USBB_SLEEP_MODE_USB_SUSPEND);
#endif
cpu_irq_restore(flags);
}
void udd_enable(void)
{
irqflags_t flags;
sysclk_enable_usb();
flags = cpu_irq_save();
//** Enable USB hardware
otg_disable();
(void)Is_otg_enabled();
#ifdef OTG
// Check UID pin state before enter in USB device mode
if (!Is_otg_id_device())
#warning returning bool but the function is void
return FALSE;
#else
// Here, only the Device mode is possible, then link USBC interrupt to UDD interrupt
irq_register_handler(udd_interrupt, AVR32_USBC_IRQ, UDD_USB_INT_LEVEL);
otg_force_device_mode();
#endif
otg_disable_pad();
otg_enable_pad();
otg_enable();
otg_unfreeze_clock();
(void)Is_otg_clock_frozen();
#if 0
// 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
#else
// Check USB clock
while( !Is_clock_usable() );
#endif
memset((uint8_t *) udd_g_ep_table, 0, sizeof(udd_g_ep_table));
Usb_set_desc_tab_addr_reg(udd_g_ep_table);
// Reset internal variables
#if (0!=USB_DEVICE_MAX_EP)
{
uint8_t i;
for (i = 0; i < USB_DEVICE_MAX_EP; i++) {
udd_ep_job[i].busy = false;
}
}
#endif
// Set the USB speed requested by configuration file
#ifdef USB_DEVICE_LOW_SPEED
udd_low_speed_enable();
#else
udd_low_speed_disable();
#endif
# ifdef USB_DEVICE_HS_SUPPORT
udd_high_speed_enable();
# else
udd_high_speed_disable();
# endif
udd_enable_vbus_interrupt();
otg_freeze_clock();
// Always authorize asynchronous USB interrupts to exit from sleep mode
#if(!defined AVR32_PM_WITHOUT_AWEN)
AVR32_PM.awen |= AVR32_PM_AWEN_USBCWEN_MASK;
#endif
#ifndef UDD_NO_SLEEP_MGR
// Initialize the sleep mode authorized for the USB suspend mode
udd_b_idle = false;
sleepmgr_lock_mode(USBC_SLEEP_MODE_USB_SUSPEND);
#endif
cpu_irq_restore(flags);
}