USBC low-level driver for USB Device mode.

USBC Custom configuration

The following USBC driver configuration must be included in the conf_usb.h file of the application.

UDD_USB_INT_LEVEL
Option to change the interrupt priority (0 to 15) by default 5 (recommended).

UDD_USB_INT_FUN
Option to fit interrupt function to what defined in exception table.

UDD_NO_SLEEP_MGR
Feature to work without sleep manager module. Default not defined. Note that with this feature defined sleep manager must not be used in application.

management

The USB driver is fully managed by interrupt and does not request periodic task. Thereby, the USB events use callbacks to transfer the information. The callbacks are declared in static during compilation or in variable during code execution.

Static declarations defined in conf_usb.h:

UDC_VBUS_EVENT(bool b_present)
To signal Vbus level change
UDC_SUSPEND_EVENT()
Called when USB bus enter in suspend mode
UDC_RESUME_EVENT()
Called when USB bus is wakeup
UDC_SOF_EVENT()
Called for each received SOF, Note: Each 1ms in HS/FS mode only.

Dynamic callbacks, called "endpoint job" , are registered in udd_ep_job_t structure via the following functions:

udd_ep_run()
To call it when a transfer is finish
udd_ep_wait_stall_clear()
To call it when a endpoint halt is disabled

mode management

The Sleep modes authorized :

in USB IDLE state, the USBC needs of USB clock and authorizes up to IDLE mode
in USB SUSPEND state, the USBC no needs USB clock but requests a minimum clock restart timing. Thus, it authorizes up to WAIT or RETENTION mode.
Vbus monitoring used in USB Self-Power mode authorizes up to BACKUP mode

The USBC_SLEEP_MODE_USB_IDLE equals SLEEPMGR_IDLE.

Power management routine.
static bool	udd_b_idle
	State of USB line. More...

static void	udd_sleep_mode (bool b_idle)
	Authorize or not the CPU powerdown mode. More...

#define	USBC_SLEEP_MODE_USB_SUSPEND SLEEPMGR_SLEEP_1
	Definition of sleep levels. More...

#define	USBC_SLEEP_MODE_USB_IDLE SLEEPMGR_ACTIVE

USB IO PADs handlers
static void	uhd_vbus_handler (void)
	USB VBus pin change handler. More...

static volatile usb_desc_table_t	udd_g_ep_table [2 *(USB_DEVICE_MAX_EP+1)]
	USB SRAM data about endpoint descriptor table The content of the USB SRAM can be : More...

Control endpoint low level management routine.
This function performs control endpoint management. It handle the SETUP/DATA/HANDSHAKE phases of a control transaction.
enum	udd_ctrl_ep_state_t { UDD_EPCTRL_SETUP = 0, UDD_EPCTRL_DATA_OUT = 1, UDD_EPCTRL_DATA_IN = 2, UDD_EPCTRL_HANDSHAKE_WAIT_IN_ZLP = 3, UDD_EPCTRL_HANDSHAKE_WAIT_OUT_ZLP = 4, UDD_EPCTRL_STALL_REQ = 5 }
	Bit definitions about endpoint control state machine for udd_ep_control_state. More...

COMPILER_WORD_ALIGNED udd_ctrl_request_t	udd_g_ctrlreq
	Global variable to give and record information about setup request management. More...

static udd_ctrl_ep_state_t	udd_ep_control_state
	State of the endpoint control management. More...

static uint16_t	udd_ctrl_prev_payload_nb_trans
	Total number of data received/sent during data packet phase with previous payload buffers. More...

static uint16_t	udd_ctrl_payload_nb_trans
	Number of data received/sent to/from udd_g_ctrlreq.payload buffer. More...

Management of bulk/interrupt/isochronous endpoints
Buffer to store the data received on control endpoint (SETUP/OUT endpoint 0) Used to avoid a RAM buffer overflow in case of the payload buffer is smaller than control endpoint size The UDD manages the data transfer on endpoints: Start data transfer on endpoint with USB Device DMA Send a ZLP packet if requested Call callback registered to signal end of transfer The transfer abort and stall feature are supported.
	udd_ep_job_t

static udd_ep_job_t	udd_ep_job [USB_DEVICE_MAX_EP]
	Array to register a job on bulk/interrupt/isochronous endpoint. More...

	UDC_BSS (4)
	Buffer to store the data received on bulk/interrupt endpoints. More...

bool	udd_include_vbus_monitoring (void)
	Authorizes the VBUS event. More...

void	udd_enable (void)
	Enables the USB Device mode. More...

void	udd_disable (void)
	Disables the USB Device mode. More...

void	udd_attach (void)
	Attach device to the bus when possible. More...

void	udd_detach (void)
	Detaches the device from the bus. More...

bool	udd_is_high_speed (void)
	Test whether the USB Device Controller is running at high speed or not. More...

void	udd_set_address (uint8_t address)
	Changes the USB address of device. More...

uint8_t	udd_getaddress (void)
	Returns the USB address of device. More...

uint16_t	udd_get_frame_number (void)
	Returns the current start of frame number. More...

uint16_t	udd_get_micro_frame_number (void)
	Returns the current micro start of frame number. More...

void	udd_send_remotewakeup (void)
	The USB driver sends a resume signal called Upstream Resume. More...

void	udd_set_setup_payload (uint8_t *payload, uint16_t payload_size)
	Load setup payload. More...

bool	udd_ep_alloc (udd_ep_id_t ep, uint8_t bmAttributes, uint16_t MaxEndpointSize)
	Configures and enables an endpoint. More...

void	udd_ep_free (udd_ep_id_t ep)
	Disables an endpoint. More...

bool	udd_ep_is_halted (udd_ep_id_t ep)
	Check if the endpoint ep is halted. More...

bool	udd_ep_set_halt (udd_ep_id_t ep)
	Set the halted state of the endpoint ep. More...

bool	udd_ep_clear_halt (udd_ep_id_t ep)
	Clear the halted state of the endpoint ep. More...

bool	udd_ep_run (udd_ep_id_t ep, bool b_shortpacket, uint8_t *buf, iram_size_t buf_size, udd_callback_trans_t callback)
	Allows to receive or send data on an endpoint. More...

void	udd_ep_abort (udd_ep_id_t ep)
	Aborts transfer on going on endpoint. More...

bool	udd_ep_wait_stall_clear (udd_ep_id_t ep, udd_callback_halt_cleared_t callback)
	Registers a callback to call when endpoint halt is cleared. More...

void	udd_test_mode_j (void)

void	udd_test_mode_k (void)

void	udd_test_mode_se0_nak (void)

void	udd_test_mode_packet (void)

static void	udd_reset_ep_ctrl (void)

static void	udd_ctrl_init (void)

static void	udd_ctrl_setup_received (void)

static void	udd_ctrl_in_sent (void)

static void	udd_ctrl_out_received (void)

static void	udd_ctrl_underflow (void)

static void	udd_ctrl_overflow (void)

static void	udd_ctrl_stall_data (void)

static void	udd_ctrl_send_zlp_in (void)

static void	udd_ctrl_send_zlp_out (void)

static void	udd_ctrl_endofrequest (void)

static bool	udd_ctrl_interrupt (void)

static void	udd_ep_trans_done (udd_ep_id_t ep)

static bool	udd_ep_interrupt (void)

USBC Device IP properties
These macros give access to IP properties
#define	udd_get_endpoint_max_nbr() otg_get_max_nbr_endpoints()
	Get maximal number of endpoints. More...

#define	UDD_MAX_PEP_NB (USBC_EPT_NBR-1)

#define	UDD_PEP_NB (USBC_EPT_NBR)

USBC Device speeds management
#define	udd_low_speed_enable() USBC_SET_BITS(UDCON,LS)
	Enable/disable device low-speed mode. More...

#define	udd_low_speed_disable() USBC_CLR_BITS(UDCON,LS)

#define	Is_udd_low_speed_enable() USBC_TST_BITS(UDCON,LS)
	Test if device low-speed mode is forced. More...

#define	udd_high_speed_enable() do { } while (0)

#define	udd_high_speed_disable() do { } while (0)

#define	Is_udd_full_speed_mode() true

USBC Device HS test mode management
#define	udd_enable_hs_test_mode() do { } while (0)

#define	udd_enable_hs_test_mode_j() do { } while (0)

#define	udd_enable_hs_test_mode_k() do { } while (0)

#define	udd_enable_hs_test_mode_packet() do { } while (0)

USBC device attach control
These macros manage the USBC Device attach.
#define	udd_detach_device() USBC_SET_BITS(UDCON,DETACH)
	detaches from USB bus More...

#define	udd_attach_device() USBC_CLR_BITS(UDCON,DETACH)
	attaches to USB bus More...

#define	Is_udd_detached() USBC_TST_BITS(UDCON,DETACH)
	test if the device is detached More...

USBC device bus events control
These macros manage the USBC Device bus events.
#define	udd_initiate_remote_wake_up() USBC_SET_BITS(UDCON,RMWKUP)
	Initiates a remote wake-up event. More...

#define	Is_udd_pending_remote_wake_up() USBC_TST_BITS(UDCON,RMWKUP)

#define	udd_enable_remote_wake_up_interrupt() USBC_REG_SET(UDINTE,UPRSME)
	Manage upstream resume event (=remote wakeup from device) The USB driver sends a resume signal called "Upstream Resume". More...

#define	udd_disable_remote_wake_up_interrupt() USBC_REG_CLR(UDINTE,UPRSME)

#define	Is_udd_remote_wake_up_interrupt_enabled() USBC_TST_BITS(UDINTE,UPRSME)

#define	udd_ack_remote_wake_up_start() USBC_REG_CLR(UDINT,UPRSM)

#define	udd_raise_remote_wake_up_start() USBC_REG_SET(UDINT,UPRSM)

#define	Is_udd_remote_wake_up_start() USBC_TST_BITS(UDINT,UPRSM)

#define	udd_enable_resume_interrupt() USBC_REG_SET(UDINTE,EORSME)
	Manage end of resume event (=remote wakeup from host) The USB controller detects a valid "End of Resume" signal initiated by the host. More...

#define	udd_disable_resume_interrupt() USBC_REG_CLR(UDINTE,EORSME)

#define	Is_udd_resume_interrupt_enabled() USBC_TST_BITS(UDINTE,EORSME)

#define	udd_ack_resume() USBC_REG_CLR(UDINT,EORSM)

#define	udd_raise_resume() USBC_REG_SET(UDINT,EORSM)

#define	Is_udd_resume() USBC_TST_BITS(UDINT,EORSM)

#define	udd_enable_wake_up_interrupt() USBC_REG_SET(UDINTE,WAKEUPE)
	Manage wake-up event (=usb line activity) The USB controller is reactivated by a filtered non-idle signal from the lines. More...

#define	udd_disable_wake_up_interrupt() USBC_REG_CLR(UDINTE,WAKEUPE)

#define	Is_udd_wake_up_interrupt_enabled() USBC_TST_BITS(UDINTE,WAKEUPE)

#define	udd_ack_wake_up() USBC_REG_CLR(UDINT,WAKEUP)

#define	udd_raise_wake_up() USBC_REG_SET(UDINT,WAKEUP)

#define	Is_udd_wake_up() USBC_TST_BITS(UDINT,WAKEUP)

#define	udd_enable_reset_interrupt() USBC_REG_SET(UDINTE,EORSTE)
	Manage reset event Set when a USB "End of Reset" has been detected. More...

#define	udd_disable_reset_interrupt() USBC_REG_CLR(UDINTE,EORSTE)

#define	Is_udd_reset_interrupt_enabled() USBC_TST_BITS(UDINTE,EORSTE)

#define	udd_ack_reset() USBC_REG_CLR(UDINT,EORST)

#define	udd_raise_reset() USBC_REG_SET(UDINT,EORST)

#define	Is_udd_reset() USBC_TST_BITS(UDINT,EORST)

#define	udd_enable_sof_interrupt() USBC_REG_SET(UDINTE,SOFE)
	Manage start of frame event. More...

#define	udd_disable_sof_interrupt() USBC_REG_CLR(UDINTE,SOFE)

#define	Is_udd_sof_interrupt_enabled() USBC_TST_BITS(UDINTE,SOFE)

#define	udd_ack_sof() USBC_REG_CLR(UDINT,SOF)

#define	udd_raise_sof() USBC_REG_SET(UDINT,SOF)

#define	Is_udd_sof() USBC_TST_BITS(UDINT,SOF)

#define	udd_frame_number() USBC_RD_BITFIELD(UDFNUM,FNUM)

#define	Is_udd_frame_number_crc_error() USBC_TST_BITS(UDFNUM,FNCERR)

#define	udd_enable_msof_interrupt() do { } while(0)
	Manage Micro start of frame event (High Speed Only) More...

#define	udd_disable_msof_interrupt() do { } while(0)

#define	Is_udd_msof_interrupt_enabled() false

#define	udd_ack_msof() do { } while(0)

#define	udd_raise_msof() do { } while(0)

#define	Is_udd_msof() false

#define	udd_micro_frame_number() (Rd_bits(USBC->USBC_UDFNUM, USBC_UDFNUM_FNUM_Msk))

#define	udd_enable_suspend_interrupt() USBC_REG_SET(UDINTE,SUSPE)
	Manage suspend event. More...

#define	udd_disable_suspend_interrupt() USBC_REG_CLR(UDINTE,SUSPE)

#define	Is_udd_suspend_interrupt_enabled() USBC_TST_BITS(UDINTE,SUSPE)

#define	udd_ack_suspend() USBC_REG_CLR(UDINT,SUSP)

#define	udd_raise_suspend() USBC_REG_SET(UDINT,SUSP)

#define	Is_udd_suspend() USBC_TST_BITS(UDINT,SUSP)

#define Is_udd_detached ( ) USBC_TST_BITS(UDCON,DETACH)

test if the device is detached

#define Is_udd_frame_number_crc_error ( ) USBC_TST_BITS(UDFNUM,FNCERR)

#define Is_udd_full_speed_mode ( ) true

Referenced by udd_is_high_speed().

#define Is_udd_low_speed_enable ( ) USBC_TST_BITS(UDCON,LS)

Test if device low-speed mode is forced.

#define Is_udd_msof ( ) false

#define Is_udd_msof_interrupt_enabled ( ) false

#define Is_udd_pending_remote_wake_up ( ) USBC_TST_BITS(UDCON,RMWKUP)

#define Is_udd_remote_wake_up_interrupt_enabled ( ) USBC_TST_BITS(UDINTE,UPRSME)

#define Is_udd_remote_wake_up_start ( ) USBC_TST_BITS(UDINT,UPRSM)

#define Is_udd_reset ( ) USBC_TST_BITS(UDINT,EORST)

#define Is_udd_reset_interrupt_enabled ( ) USBC_TST_BITS(UDINTE,EORSTE)

#define Is_udd_resume ( ) USBC_TST_BITS(UDINT,EORSM)

#define Is_udd_resume_interrupt_enabled ( ) USBC_TST_BITS(UDINTE,EORSME)

#define Is_udd_sof ( ) USBC_TST_BITS(UDINT,SOF)

#define Is_udd_sof_interrupt_enabled ( ) USBC_TST_BITS(UDINTE,SOFE)

#define Is_udd_suspend ( ) USBC_TST_BITS(UDINT,SUSP)

#define Is_udd_suspend_interrupt_enabled ( ) USBC_TST_BITS(UDINTE,SUSPE)

#define Is_udd_wake_up ( ) USBC_TST_BITS(UDINT,WAKEUP)

#define Is_udd_wake_up_interrupt_enabled ( ) USBC_TST_BITS(UDINTE,WAKEUPE)

#define udd_ack_msof ( ) do { } while(0)

#define udd_ack_remote_wake_up_start ( ) USBC_REG_CLR(UDINT,UPRSM)

#define udd_ack_reset ( ) USBC_REG_CLR(UDINT,EORST)

Referenced by udd_attach().

#define udd_ack_resume ( ) USBC_REG_CLR(UDINT,EORSM)

#define udd_ack_sof ( ) USBC_REG_CLR(UDINT,SOF)

Referenced by udd_attach().

#define udd_ack_suspend ( ) USBC_REG_CLR(UDINT,SUSP)

#define udd_ack_wake_up ( ) USBC_REG_CLR(UDINT,WAKEUP)

Referenced by udd_attach().

#define udd_attach_device ( ) USBC_CLR_BITS(UDCON,DETACH)

attaches to USB bus

Referenced by udd_attach().

#define udd_detach_device ( ) USBC_SET_BITS(UDCON,DETACH)

detaches from USB bus

Referenced by udd_detach().

#define udd_disable_msof_interrupt ( ) do { } while(0)

#define udd_disable_remote_wake_up_interrupt ( ) USBC_REG_CLR(UDINTE,UPRSME)

#define udd_disable_reset_interrupt ( ) USBC_REG_CLR(UDINTE,EORSTE)

#define udd_disable_resume_interrupt ( ) USBC_REG_CLR(UDINTE,EORSME)

#define udd_disable_sof_interrupt ( ) USBC_REG_CLR(UDINTE,SOFE)

#define udd_disable_suspend_interrupt ( ) USBC_REG_CLR(UDINTE,SUSPE)

#define udd_disable_wake_up_interrupt ( ) USBC_REG_CLR(UDINTE,WAKEUPE)

#define udd_enable_hs_test_mode ( ) do { } while (0)

Referenced by udd_test_mode_j(), udd_test_mode_k(), udd_test_mode_packet(), and udd_test_mode_se0_nak().

#define udd_enable_hs_test_mode_j ( ) do { } while (0)

Referenced by udd_test_mode_j().

#define udd_enable_hs_test_mode_k ( ) do { } while (0)

Referenced by udd_test_mode_k().

#define udd_enable_hs_test_mode_packet ( ) do { } while (0)

Referenced by udd_test_mode_packet().

#define udd_enable_msof_interrupt ( ) do { } while(0)

Manage Micro start of frame event (High Speed Only)

#define udd_enable_remote_wake_up_interrupt ( ) USBC_REG_SET(UDINTE,UPRSME)

Manage upstream resume event (=remote wakeup from device) The USB driver sends a resume signal called "Upstream Resume".

#define udd_enable_reset_interrupt ( ) USBC_REG_SET(UDINTE,EORSTE)

Manage reset event Set when a USB "End of Reset" has been detected.

Referenced by udd_attach().

#define udd_enable_resume_interrupt ( ) USBC_REG_SET(UDINTE,EORSME)

Manage end of resume event (=remote wakeup from host) The USB controller detects a valid "End of Resume" signal initiated by the host.

#define udd_enable_sof_interrupt ( ) USBC_REG_SET(UDINTE,SOFE)

Manage start of frame event.

Referenced by udd_attach().

#define udd_enable_suspend_interrupt ( ) USBC_REG_SET(UDINTE,SUSPE)

Manage suspend event.

Referenced by udd_attach().

#define udd_enable_wake_up_interrupt ( ) USBC_REG_SET(UDINTE,WAKEUPE)

Manage wake-up event (=usb line activity) The USB controller is reactivated by a filtered non-idle signal from the lines.

Referenced by udd_attach().

#define udd_frame_number ( ) USBC_RD_BITFIELD(UDFNUM,FNUM)

Referenced by udd_get_frame_number().

#define udd_get_endpoint_max_nbr ( ) otg_get_max_nbr_endpoints()

Get maximal number of endpoints.

#define udd_high_speed_disable ( ) do { } while (0)

Referenced by udd_enable().

#define udd_high_speed_enable ( ) do { } while (0)

Referenced by udd_enable().

#define udd_initiate_remote_wake_up ( ) USBC_SET_BITS(UDCON,RMWKUP)

Initiates a remote wake-up event.

Referenced by udd_send_remotewakeup().

#define udd_low_speed_disable ( ) USBC_CLR_BITS(UDCON,LS)

Referenced by udd_enable().

#define udd_low_speed_enable ( ) USBC_SET_BITS(UDCON,LS)

Enable/disable device low-speed mode.

Referenced by udd_enable().

#define UDD_MAX_PEP_NB (USBC_EPT_NBR-1)

#define udd_micro_frame_number ( ) (Rd_bits(USBC->USBC_UDFNUM, USBC_UDFNUM_FNUM_Msk))

Referenced by udd_get_micro_frame_number().

#define UDD_PEP_NB (USBC_EPT_NBR)

#define udd_raise_msof ( ) do { } while(0)

#define udd_raise_remote_wake_up_start ( ) USBC_REG_SET(UDINT,UPRSM)

#define udd_raise_reset ( ) USBC_REG_SET(UDINT,EORST)

#define udd_raise_resume ( ) USBC_REG_SET(UDINT,EORSM)

#define udd_raise_sof ( ) USBC_REG_SET(UDINT,SOF)

#define udd_raise_suspend ( ) USBC_REG_SET(UDINT,SUSP)

Referenced by udd_attach().

#define udd_raise_wake_up ( ) USBC_REG_SET(UDINT,WAKEUP)

#define USBC_SLEEP_MODE_USB_IDLE SLEEPMGR_ACTIVE

Referenced by udd_sleep_mode().

#define USBC_SLEEP_MODE_USB_SUSPEND SLEEPMGR_SLEEP_1

Definition of sleep levels.

Referenced by udd_disable(), and udd_enable().

enum udd_ctrl_ep_state_t

Bit definitions about endpoint control state machine for udd_ep_control_state.

Enumerator
UDD_EPCTRL_SETUP	Wait a SETUP packet.
UDD_EPCTRL_DATA_OUT	Wait a OUT data packet.
UDD_EPCTRL_DATA_IN	Wait a IN data packet.
UDD_EPCTRL_HANDSHAKE_WAIT_IN_ZLP	Wait a IN ZLP packet.
UDD_EPCTRL_HANDSHAKE_WAIT_OUT_ZLP	Wait a OUT ZLP packet.
UDD_EPCTRL_STALL_REQ	STALL enabled on IN & OUT packet.

UDC_BSS ( 4 )

Buffer to store the data received on bulk/interrupt endpoints.

Used to avoid a RAM buffer overflow in case of the user buffer is smaller than endpoint size

Warning: The protected interrupt endpoint size is 512 bytes max.; The isochronous and endpoint is not protected by this system and the user must always use a buffer corresponding at endpoint size. Function called by USBC interrupt to manage USB device interrupts

USB Device interrupt events are split in three parts:

USB line events (SOF, reset, suspend, resume, wakeup)
control endpoint events (setup reception, end of data transfer, underflow, overflow, stall)
bulk/interrupt/isochronous endpoints events (end of data transfer)

Note: Here, the global interrupt mask is not clear when an USB interrupt is enabled because this one can not be occurred during the USB ISR (=during INTX is masked). See Technical reference $3.8.3 Masking interrupt requests in peripheral modules.

void udd_attach ( void )

Attach device to the bus when possible.

Warning: If a VBus control is included in driver, then it will attach device when an acceptable Vbus level from the host is detected.

References cpu_irq_restore(), cpu_irq_save(), Is_otg_clock_usable, otg_freeze_clock, otg_unfreeze_clock, udd_ack_reset, udd_ack_sof, udd_ack_wake_up, udd_attach_device, udd_enable_reset_interrupt, udd_enable_sof_interrupt, udd_enable_suspend_interrupt, udd_enable_wake_up_interrupt, udd_raise_suspend, and udd_sleep_mode().

Referenced by udc_attach(), udd_enable(), and uhd_vbus_handler().

static void udd_ctrl_endofrequest ( void )

static

References udd_ctrl_request_t::callback, and udd_g_ctrlreq.

Referenced by udd_ctrl_in_sent(), udd_ctrl_out_received(), and udd_ctrl_setup_received().

static void udd_ctrl_init ( void )

static

References udd_ctrl_request_t::callback, udd_ctrl_request_t::over_under_run, udd_ctrl_request_t::payload_size, udd_ack_out_received, udd_disable_in_send_interrupt, udd_ep_control_state, UDD_EPCTRL_SETUP, and udd_g_ctrlreq.

Referenced by udd_ctrl_in_sent(), udd_ctrl_out_received(), and udd_ctrl_setup_received().

static bool udd_ctrl_interrupt ( void )

static

References dbg_print, Is_udd_endpoint_interrupt, Is_udd_in_send, Is_udd_in_send_interrupt_enabled, Is_udd_nak_in, Is_udd_nak_out, Is_udd_out_received, Is_udd_setup_received, udd_ack_nak_in, udd_ack_nak_out, udd_ctrl_in_sent(), udd_ctrl_out_received(), udd_ctrl_overflow(), udd_ctrl_setup_received(), udd_ctrl_underflow(), udd_disable_nak_in_interrupt, and udd_disable_nak_out_interrupt.

static void udd_ctrl_overflow ( void )

static

References Is_udd_in_send, udd_enable_stall_handshake, udd_ep_control_state, and UDD_EPCTRL_HANDSHAKE_WAIT_IN_ZLP.

Referenced by udd_ctrl_interrupt().

static void udd_ctrl_send_zlp_in ( void )

static

References cpu_irq_restore(), cpu_irq_save(), udd_ack_in_send, udd_ack_nak_out, udd_enable_in_send_interrupt, udd_enable_nak_out_interrupt, udd_ep_control_state, UDD_EPCTRL_HANDSHAKE_WAIT_IN_ZLP, and udd_udesc_rst_buf0_ctn.

Referenced by udd_ctrl_out_received(), udd_ctrl_setup_received(), and udd_ctrl_underflow().

static void udd_ctrl_send_zlp_out ( void )

static

References cpu_irq_restore(), cpu_irq_save(), udd_ack_nak_in, udd_enable_nak_in_interrupt, udd_ep_control_state, and UDD_EPCTRL_HANDSHAKE_WAIT_OUT_ZLP.

Referenced by udd_ctrl_in_sent().

static void udd_ctrl_setup_received ( void )

static

static void udd_ctrl_stall_data ( void )

static

References udd_enable_stall_handshake, udd_ep_control_state, and UDD_EPCTRL_STALL_REQ.

Referenced by udd_ctrl_out_received(), and udd_ctrl_setup_received().

static void udd_ctrl_underflow ( void )

static

References Is_udd_out_received, udd_ctrl_send_zlp_in(), udd_enable_stall_handshake, udd_ep_control_state, UDD_EPCTRL_DATA_OUT, and UDD_EPCTRL_HANDSHAKE_WAIT_OUT_ZLP.

Referenced by udd_ctrl_interrupt().

void udd_detach ( void )

Detaches the device from the bus.

The driver must remove pull-up on USB line D- or D+.

References otg_freeze_clock, otg_unfreeze_clock, udd_detach_device, and udd_sleep_mode().

Referenced by udc_detach(), udd_disable(), and uhd_vbus_handler().

void udd_disable ( void )

Disables the USB Device mode.

References cpu_irq_restore(), cpu_irq_save(), Is_otg_host_mode_enabled, Is_pad_id_device, otg_disable, otg_unfreeze_clock, sleepmgr_unlock_mode(), sysclk_disable_usb(), udd_detach(), and USBC_SLEEP_MODE_USB_SUSPEND.

Referenced by udc_stop().

void udd_enable ( void )

void udd_ep_abort ( udd_ep_id_t ep )

Aborts transfer on going on endpoint.

If a transfer is on going, then it is stopped and the callback registered is called to signal the end of transfer. Note: The control endpoint is not authorized.

Parameters

ep	Endpoint to abort

References cpu_irq_restore(), cpu_irq_save(), dbg_print, Is_udd_endpoint_in, udd_disable_endpoint_interrupt, udd_enable_busy_bank0, udd_ep_job_t, UDD_EP_TRANSFER_ABORT, USB_EP_ADDR_MASK, and USB_EP_DIR_IN.

Referenced by udc_req_std_ep_set_feature(), udd_ep_free(), and udd_ep_set_halt().

bool udd_ep_alloc	(	udd_ep_id_t	ep,
		uint8_t	bmAttributes,
		uint16_t	MaxEndpointSize
	)

Configures and enables an endpoint.

Parameters

ep	Endpoint number including direction (USB_EP_DIR_IN/USB_EP_DIR_OUT).
bmAttributes	Attributes of endpoint declared in the descriptor.
MaxEndpointSize	Endpoint maximum size

Returns: 1 if the endpoint is enabled, otherwise 0.

References Assert, Is_udd_endpoint_enabled, udd_configure_endpoint, udd_disable_nyet, udd_enable_busy_bank0, udd_enable_endpoint, USB_EP_ADDR_MASK, USB_EP_DIR_IN, USB_EP_TYPE_BULK, USB_EP_TYPE_INTERRUPT, USB_EP_TYPE_ISOCHRONOUS, and USB_EP_TYPE_MASK.

Referenced by udc_iface_enable().

bool udd_ep_clear_halt ( udd_ep_id_t ep )

Clear the halted state of the endpoint ep.

After calling this function, any transaction on ep will be handled normally, i.e. a STALL handshake will not be sent, and the data toggle sequence will start at DATA0.

Parameters

ep	The ID of the endpoint to be un-halted

Returns: 1 if function was successfully done, otherwise 0.

References Is_udd_endpoint_stall_requested, Is_udd_stall, udd_ack_stall, udd_disable_stall_handshake, udd_ep_job_t, udd_reset_data_toggle, and USB_EP_ADDR_MASK.

Referenced by udc_req_std_ep_clear_feature().

void udd_ep_free ( udd_ep_id_t ep )

Disables an endpoint.

Parameters

ep	Endpoint number including direction (USB_EP_DIR_IN/USB_EP_DIR_OUT).

References Is_udd_ram_access_error, udd_disable_endpoint, and udd_ep_abort().

Referenced by udc_iface_disable().

static bool udd_ep_interrupt ( void )

static

References dbg_print, Is_udd_endpoint_in, Is_udd_endpoint_interrupt, Is_udd_endpoint_interrupt_enabled, udd_ep_trans_done(), USB_DEVICE_MAX_EP, and USB_EP_DIR_IN.

bool udd_ep_is_halted ( udd_ep_id_t ep )

Check if the endpoint ep is halted.

Parameters

ep	The ID of the endpoint to check.

Returns: 1 if ep is halted, otherwise 0.

References Is_udd_endpoint_stall_requested, and USB_EP_ADDR_MASK.

Referenced by udc_req_std_ep_get_status().

bool udd_ep_run	(	udd_ep_id_t	ep,
		bool	b_shortpacket,
		uint8_t *	buf,
		iram_size_t	buf_size,
		udd_callback_trans_t	callback
	)

Allows to receive or send data on an endpoint.

The driver uses a specific DMA USB to transfer data from internal RAM to endpoint, if this one is available. When the transfer is finished or aborted (stall, reset, ...), the callback is called. The callback returns the transfer status and eventually the number of byte transfered. Note: The control endpoint is not authorized.

Parameters

ep	The ID of the endpoint to use
b_shortpacket	Enabled automatic short packet
buf	Buffer on Internal RAM to send or fill. It must be align, then use COMPILER_WORD_ALIGNED.
buf_size	Buffer size to send or fill
callback	NULL or function to call at the end of transfer

Warning: About b_shortpacket, for IN endpoint it means that a short packet (or a Zero Length Packet) will be sent to the USB line to properly close the usb transfer at the end of the data transfer. For Bulk and Interrupt OUT endpoint, it will automatically stop the transfer at the end of the data transfer (received short packet).

Returns: 1 if function was successfully done, otherwise 0.

References cpu_irq_restore(), cpu_irq_save(), dbg_print, Is_udd_endpoint_enabled, Is_udd_endpoint_stall_requested, udd_ep_job_t, udd_ep_trans_done(), udd_get_endpoint_size, udd_get_endpoint_type, udd_udesc_rst_buf0_ctn, udd_udesc_rst_buf0_size, USB_EP_ADDR_MASK, and USB_EP_DIR_IN.

Referenced by udi_cdc_ctrl_state_notify(), udi_cdc_data_received(), udi_cdc_rx_start(), and udi_cdc_tx_send().

bool udd_ep_set_halt ( udd_ep_id_t ep )

Set the halted state of the endpoint ep.

After calling this function, any transaction on ep will result in a STALL handshake being sent. Any pending transactions will be performed first, however.

Parameters

ep	The ID of the endpoint to be halted

Returns: 1 if ep is halted, otherwise 0.

References udd_enable_stall_handshake, udd_ep_abort(), and USB_EP_ADDR_MASK.

Referenced by udc_req_std_ep_set_feature().

static void udd_ep_trans_done ( udd_ep_id_t ep )

static

bool udd_ep_wait_stall_clear	(	udd_ep_id_t	ep,
		udd_callback_halt_cleared_t	callback
	)

Registers a callback to call when endpoint halt is cleared.

Parameters

ep	The ID of the endpoint to use
callback	NULL or function to call when endpoint halt is cleared

Warning: if the endpoint is not halted then the callback is called immediately.

Returns: 1 if the register is accepted, otherwise 0.

References Is_udd_endpoint_enabled, Is_udd_endpoint_stall_requested, udd_ep_job_t, and USB_EP_ADDR_MASK.

uint16_t udd_get_frame_number ( void )

Returns the current start of frame number.

Returns: current start of frame number.

References udd_frame_number.

Referenced by udi_cdc_tx_send().

uint16_t udd_get_micro_frame_number ( void )

Returns the current micro start of frame number.

Returns: current micro start of frame number required in high speed mode.

References udd_micro_frame_number.

Referenced by udi_cdc_tx_send().

uint8_t udd_getaddress ( void )

Returns the USB address of device.

Returns: USB address

References udd_get_configured_address.

Referenced by udc_req_std_dev_set_configuration().

bool udd_include_vbus_monitoring ( void )

Authorizes the VBUS event.

Returns: true, if the VBUS monitoring is possible.

Referenced by udc_include_vbus_monitoring().

bool udd_is_high_speed ( void )

Test whether the USB Device Controller is running at high speed or not.

Returns: true if the Device is running at high speed mode, otherwise false.

References Is_udd_full_speed_mode.

Referenced by udc_req_std_dev_get_descriptor(), udc_req_std_dev_set_configuration(), udc_req_std_dev_set_feature(), and udi_cdc_tx_send().

static void udd_reset_ep_ctrl ( void )

static

References cpu_irq_restore(), cpu_irq_save(), udd_configure_address, udd_configure_endpoint, udd_disable_busy_bank0, udd_enable_address, udd_enable_endpoint, udd_enable_endpoint_interrupt, udd_enable_out_received_interrupt, udd_enable_setup_received_interrupt, udd_udesc_rst_buf0_size, udd_udesc_set_buf0_addr, and USB_EP_TYPE_CONTROL.

void udd_send_remotewakeup ( void )

The USB driver sends a resume signal called Upstream Resume.

References otg_unfreeze_clock, udd_b_idle, udd_initiate_remote_wake_up, and udd_sleep_mode().

Referenced by udc_remotewakeup().

void udd_set_address ( uint8_t address )

Changes the USB address of device.

Parameters

address New USB address

References udd_configure_address, udd_disable_address, and udd_enable_address.

Referenced by udc_valid_address().

void udd_set_setup_payload	(	uint8_t *	payload,
		uint16_t	payload_size
	)

Load setup payload.

Parameters

payload	Pointer on payload
payload_size	Size of payload

References udd_ctrl_request_t::payload, udd_ctrl_request_t::payload_size, and udd_g_ctrlreq.

Referenced by udc_req_std_dev_get_configuration(), udc_req_std_dev_get_descriptor(), udc_req_std_dev_get_status(), udc_req_std_dev_get_str_desc(), udc_req_std_ep_get_status(), and udc_req_std_iface_get_setting().

static void udd_sleep_mode ( bool b_idle )

static

Authorize or not the CPU powerdown mode.

Parameters

b_enable true to authorize powerdown mode

References sleepmgr_lock_mode(), sleepmgr_unlock_mode(), udd_b_idle, and USBC_SLEEP_MODE_USB_IDLE.

Referenced by udd_attach(), udd_detach(), and udd_send_remotewakeup().

void udd_test_mode_j ( void )

References udd_enable_hs_test_mode, and udd_enable_hs_test_mode_j.

Referenced by udc_req_std_dev_set_feature().

void udd_test_mode_k ( void )

References udd_enable_hs_test_mode, and udd_enable_hs_test_mode_k.

Referenced by udc_req_std_dev_set_feature().

void udd_test_mode_packet ( void )

References cpu_irq_restore(), cpu_irq_save(), udd_ack_in_send, udd_configure_endpoint, udd_disable_endpoint, udd_enable_hs_test_mode, udd_enable_hs_test_mode_packet, udd_enable_in_send_interrupt, udd_udesc_set_buf0_addr, and USB_EP_TYPE_BULK.

Referenced by udc_req_std_dev_set_feature().

void udd_test_mode_se0_nak ( void )

References udd_enable_hs_test_mode.

Referenced by udc_req_std_dev_set_feature().

static void uhd_vbus_handler ( void )

static

USB VBus pin change handler.

References dbg_print, Is_pad_vbus_high, pad_ack_vbus_interrupt, UDC_VBUS_EVENT, udd_attach(), and udd_detach().

Referenced by udd_enable().

bool udd_b_idle

static

State of USB line.

Referenced by udd_enable(), udd_send_remotewakeup(), and udd_sleep_mode().

uint16_t udd_ctrl_payload_nb_trans

static

Number of data received/sent to/from udd_g_ctrlreq.payload buffer.

Referenced by udd_ctrl_in_sent(), udd_ctrl_out_received(), and udd_ctrl_setup_received().

uint16_t udd_ctrl_prev_payload_nb_trans

static

Total number of data received/sent during data packet phase with previous payload buffers.

Referenced by udd_ctrl_in_sent(), udd_ctrl_out_received(), and udd_ctrl_setup_received().

udd_ctrl_ep_state_t udd_ep_control_state

static

State of the endpoint control management.

Referenced by udd_ctrl_in_sent(), udd_ctrl_init(), udd_ctrl_out_received(), udd_ctrl_overflow(), udd_ctrl_send_zlp_in(), udd_ctrl_send_zlp_out(), udd_ctrl_setup_received(), udd_ctrl_stall_data(), and udd_ctrl_underflow().

udd_ep_job_t udd_ep_job[USB_DEVICE_MAX_EP]

static

Array to register a job on bulk/interrupt/isochronous endpoint.

udd_ep_job_t

Referenced by udd_ep_abort(), udd_ep_clear_halt(), udd_ep_run(), udd_ep_trans_done(), and udd_ep_wait_stall_clear().

COMPILER_WORD_ALIGNED udd_ctrl_request_t udd_g_ctrlreq

volatile usb_desc_table_t udd_g_ep_table[2 *(USB_DEVICE_MAX_EP+1)]

static

USB SRAM data about endpoint descriptor table The content of the USB SRAM can be :

modified by USB hardware by interface to signal endpoint status. Thereby, it is read by software.
modified by USB software to control endpoint. Thereby, it is read by hardware. This data section is volatile.

Referenced by udd_enable().

Microchip® Advanced Software Framework

USBC Custom configuration

management

mode management

Power management routine.

USB IO PADs handlers

Control endpoint low level management routine.

Management of bulk/interrupt/isochronous endpoints

USBC Device IP properties

USBC Device speeds management

USBC Device HS test mode management

USBC device attach control

USBC device bus events control