USB Device Core API#

sl_usbd_device_speed_t#

sl_usbd_device_speed_t

DATA TYPES.

                                  USB DEVICE SPEED DATA TYPE

Note

• (1) 'Universal Serial Bus Specification Rev 2.0', section 4.2.1 defines three data rates:

  • (a) The USB Low-Speed (LS) signaling bit rate is 1.5 Mb/s.

  • (b) The USB Full-Speed (FS) signaling bit rate is 12 Mb/s.

  • (c) The USB High-Speed (HS) signaling bit rate is 480 Mb/s.

sl_usbd_device_state_t#

sl_usbd_device_state_t

                                  USB DEVICE STATES DATA TYPE

Note

• (1) 'Universal Serial Bus Specification Rev 2.0', section 9.1.1 defines seven visible device states:

  • (a) SL_USBD_DEVICE_STATE_INIT : Device is not attached to the USB.

  • (b) SL_USBD_DEVICE_STATE_ATTACHED : Device is attached to the USB, but not powered.

  • (c) USBD_DEV_STATE_POWERED : Device is attached to the USB and powered, but has not been reset.

  • (d) SL_USBD_DEVICE_STATE_DEFAULT : Device is attached to the USB and powered and has been reset, but has not been assigned a unique address. Device responds at the default address.

  • (e) SL_USBD_DEVICE_STATE_ADDRESSED : Device is attached to the USB, powered, has been reset, and a unique device address has been assigned. Device is not configured.

  • (f) SL_USBD_DEVICE_STATE_CONFIGURED : Device is attached to the USB, powered, has been reset, has a unique address, is configured, and is not suspended. The host may now use the function provided by the device.

  • (g) SL_USBD_DEVICE_STATE_SUSPENDED : Device is, at minimum, attached to the USB and is powered and has not seen bus activity for 3 ms. It may also have a unique address and be configured for use. However, because the device is suspended, the host may not use the device's function.

• (2) An additional state is added (USBD_DEV_STATE_START) to determine if the device controller has been initialized.

sl_usbd_bus_event_t#

sl_usbd_bus_event_t

BUS EVENT DATA TYPE.

sl_usbd_config_event_t#

sl_usbd_config_event_t

CONFIG EVENT DATA TYPE.

sl_usbd_async_function_t#

typedef void(* sl_usbd_async_function_t) (uint8_t ep_addr, void *p_buf, uint32_t buf_len, uint32_t xfer_len, void *p_arg, sl_status_t status) )(uint8_t ep_addr, void *p_buf, uint32_t buf_len, uint32_t xfer_len, void *p_arg, sl_status_t status)

EP ASYNCHRONOUS CALLBACK API.

sl_usbd_core_init#

sl_status_t sl_usbd_core_init (void )

FUNCTION PROTOTYPES.

CONFIGURATION OVERRIDE FUNCTIONS USBD CORE FUNCTIONS

Note(s) : (1) USB Spec 2.0, Section 5.5 states "Control transfers allow access to different parts of a device. Control transfers are intended to support configuration/command/status type communication flows between client software and its function".

(a) "Each USB device is required to implement the Default Control Pipe as a message pipe. This pipe is used by the USB System Software. The Default Control Pipe provides access to the USB device's configuration, status, and control information".

The 'sl_usbd_core_ep_XXXX()' functions perform operations in the default endpoint. Class drivers should use 'sl_usbd_core_ep_XXXX()' to send/receive class specific requests.

                                            sl_usbd_core_init()

Initialize the USB device stack.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) sli_usbd_core_init_internals() MUST be called ... :

  • (a) ONLY ONCE from a product's application;

  • (b) With the following conditions:

    • (1) AFTER the product's OS has been initialized.

    • (2) BEFORE the product's application calls any USB device stack function(s).

sl_usbd_core_start_device#

sl_status_t sl_usbd_core_start_device (void )

Start the device stack.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Device stack can be only started if the device is in one of the following states:

  • SL_USBD_DEVICE_STATE_NONE Device controller has not been initialized.

  • SL_USBD_DEVICE_STATE_INIT Device controller is already initialized.

sl_usbd_core_stop_device#

sl_status_t sl_usbd_core_stop_device (void )

Stop the device stack.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_get_device_state#

sl_status_t sl_usbd_core_get_device_state (sl_usbd_device_state_t * p_dev_state)

Get the current device state.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_get_device_speed#

sl_status_t sl_usbd_core_get_device_speed (sl_usbd_device_speed_t * p_dev_speed)

Get device speed.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_set_device_self_power#

sl_status_t sl_usbd_core_set_device_self_power (bool self_pwr)

Set the device's current power source.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_get_device_configuration#

sl_status_t sl_usbd_core_get_device_configuration (sl_usbd_device_config_t ** p_dev_cfg)

Set the device's Microsoft vendor code.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) The vendor code used MUST be different from any vendor bRequest value.

Get the device configuration.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_get_device_frame_number#

sl_status_t sl_usbd_core_get_device_frame_number (uint16_t * p_frame_nbr)

Get the last frame number from the driver.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) The frame number will always be in the range of 0-2047 (11 bits).

• (2) Frame number returned to the caller contains the frame and microframe numbers. It is encoded following this 16-bit format:

  *               | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
  *               |  0    0 |  microframe  |                  frame                     |
  *               

  Caller must use the macros SL_USBD_FRAME_NBR_GET() or SL_USBD_MICROFRAME_NBR_GET() to get the frame or microframe number only.

sl_usbd_core_add_configuration#

sl_status_t sl_usbd_core_add_configuration (uint8_t attrib, uint16_t max_pwr, sl_usbd_device_speed_t spd, const char * p_name, uint8_t * p_cfg_nbr)

Add a configuration attribute to the device.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) USB spec 2.0 (section 7.2.1.3/4) defines power constraints for bus-powered devices: "A low-power function draws up to one unit load from the USB cable when operational" "A function is high-power if, when fully powered, draws over one, but no more than five, unit loads from the USB cable." A unit load is defined as 100mA, so 'max_pwr' argument should be between 0 mA and 500mA

• (2) String support is optional: 'p_name' can be a NULL string pointer.

• (3) Configuration can only be added when the device is in the following states:

  • SL_USBD_DEVICE_STATE_NONE Device controller has not been initialized.

  • SL_USBD_DEVICE_STATE_INIT Device controller is already initialized.

sl_usbd_core_add_interface#

sl_status_t sl_usbd_core_add_interface (uint8_t cfg_nbr, sl_usbd_class_driver_t * p_class_drv, void * p_if_class_arg, void * p_if_alt_class_arg, uint8_t class_code, uint8_t class_sub_code, uint8_t class_protocol_code, const char * p_name, uint8_t * p_if_nbr)

Associate a configuration with its alternative-speed counterpart.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Configurations from high- and full-speed can be associated with each other to provide comparable functionality regardless of speed.

• (2) Configuration can ONLY be associated when the device is in the following states:

  • SL_USBD_DEVICE_STATE_NONE Device controller has not been initialized.

  • SL_USBD_DEVICE_STATE_INIT Device controller is already initialized.

Add an interface to a specific configuration.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) USB Spec 2.0 Interface (section 9.6.5) states: "An interface may include alternate settings that allow the endpoints and/or their characteristics to be varied after the device has been configured. The default setting for an interface is always an alternate setting of zero."

sl_usbd_core_add_alt_interface#

sl_status_t sl_usbd_core_add_alt_interface (uint8_t config_nbr, uint8_t if_nbr, void * p_class_arg, const char * p_name, uint8_t * p_if_alt_nbr)

Add an alternate setting to a specific interface.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_add_interface_group#

sl_status_t sl_usbd_core_add_interface_group (uint8_t config_nbr, uint8_t class_code, uint8_t class_sub_code, uint8_t class_protocol_code, uint8_t if_start, uint8_t if_cnt, const char * p_name, uint8_t * p_if_grp_num)

Create an interface group.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_get_device_descriptor#

sl_status_t sl_usbd_core_get_device_descriptor (uint8_t * p_buf, uint8_t max_len, uint8_t * p_desc_len)

Get the device descriptor.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) This function should be used by drivers that supporting the standard requests auto-reply, (during the initialization process).

sl_usbd_core_get_configuration_descriptor#

sl_status_t sl_usbd_core_get_configuration_descriptor (uint8_t * p_buf, uint16_t max_len, uint8_t config_ix, uint16_t * p_desc_len)

Get a configuration descriptor.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) This function should be used by drivers supporting a standard request's auto-reply, during the initialization process.

sl_usbd_core_get_string_descriptor#

sl_status_t sl_usbd_core_get_string_descriptor (uint8_t * p_buf, uint8_t max_len, uint8_t str_ix, uint8_t * p_desc_len)

Get a string descriptor.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) This function should be used by drivers supporting a standard request's auto-reply, during the initialization process.

sl_usbd_core_add_string#

sl_status_t sl_usbd_core_add_string (const char * p_str)

Add string to USB device.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) USB spec 2.0 chapter 9.5 states: "Where appropriate, descriptors contain references to string descriptors that provide displayable information describing a descriptor in human-readable form. The inclusion of string descriptors is optional. However, the reference fields within descriptors are mandatory. If a device does not support string descriptors, string reference fields must be reset to zero to indicate no string descriptor is available". Since string descriptors are optional, 'p_str' could be a NULL pointer.

sl_usbd_core_get_string_index#

sl_status_t sl_usbd_core_get_string_index (const char * p_str, uint8_t * p_str_ix)

Get string index corresponding to a given string.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_write_08b_to_descriptor_buf#

sl_status_t sl_usbd_core_write_08b_to_descriptor_buf (uint8_t val)

Write an 8-bit value to the descriptor buffer.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) USB classes may use this function to append class-specific descriptors to the configuration descriptor.

sl_usbd_core_write_16b_to_descriptor_buf#

sl_status_t sl_usbd_core_write_16b_to_descriptor_buf (uint16_t val)

Write a 16-bit value in the descriptor buffer.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) USB classes may use this function to append class-specific descriptors to the configuration descriptor.

• (2) USB descriptors are in little-endian format.

sl_usbd_core_write_24b_to_descriptor_buf#

sl_status_t sl_usbd_core_write_24b_to_descriptor_buf (uint32_t val)

Write a 24-bit value to the descriptor buffer.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) USB classes may use this function to append class-specific descriptors to the configuration descriptor.

• (2) USB descriptors are in little-endian format.

sl_usbd_core_write_32b_to_descriptor_buf#

sl_status_t sl_usbd_core_write_32b_to_descriptor_buf (uint32_t val)

Write a 32-bit value to the descriptor buffer.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) USB classes may use this function to append class-specific descriptors to the configuration descriptor.

• (2) USB descriptors are in little-endian format.

sl_usbd_core_write_buf_to_descriptor_buf#

sl_status_t sl_usbd_core_write_buf_to_descriptor_buf (const uint8_t * p_buf, uint16_t len)

Write a buffer into the descriptor buffer.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) USB classes may use this function to append class-specific descriptors to the configuration descriptor.

sl_usbd_core_write_control_sync#

sl_status_t sl_usbd_core_write_control_sync (void * p_buf, uint32_t buf_len, uint16_t timeout_ms, bool end, uint32_t * p_xfer_len)

Send data on the Control IN endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) If end-of-transfer is set and transfer length is multiple of maximum packet size, a zero-length packet is transferred to indicate a short transfer to the host.

• (2) Transmit buffer must be 32 bits aligned.

sl_usbd_core_read_control_sync#

sl_status_t sl_usbd_core_read_control_sync (void * p_buf, uint32_t buf_len, uint16_t timeout_ms, uint32_t * p_xfer_len)

Receive data on the Control OUT endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Receive buffer must be 32 bits aligned.

sl_usbd_core_add_bulk_endpoint#

sl_status_t sl_usbd_core_add_bulk_endpoint (uint8_t config_nbr, uint8_t if_nbr, uint8_t if_alt_nbr, bool dir_in, uint16_t max_pkt_len, uint8_t * p_ep_addr)

Add a bulk endpoint to alternate setting interface.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) If the 'max_pkt_len' argument is '0', the stack will allocate the first available BULK endpoint, regardless its maximum packet size.

sl_usbd_core_read_bulk_sync#

sl_status_t sl_usbd_core_read_bulk_sync (uint8_t ep_addr, void * p_buf, uint32_t buf_len, uint16_t timeout_ms, uint32_t * p_xfer_len)

Receive data on Bulk OUT endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Receive buffer must be 32 bits aligned.

sl_usbd_core_read_bulk_async#

sl_status_t sl_usbd_core_read_bulk_async (uint8_t ep_addr, void * p_buf, uint32_t buf_len, sl_usbd_async_function_t async_fnct, void * p_async_arg)

Receive data on Bulk OUT endpoint asynchronously.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Receive buffer must be 32 bits aligned.

sl_usbd_core_write_bulk_sync#

sl_status_t sl_usbd_core_write_bulk_sync (uint8_t ep_addr, void * p_buf, uint32_t buf_len, uint16_t timeout_ms, bool end, uint32_t * p_xfer_len)

Send data on a Bulk IN endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) This function SHOULD NOT be called from interrupt service routine (ISR).

• (2) Transmit buffer must be 32 bits aligned.

• (3) If end-of-transfer is set and transfer length is multiple of maximum packet sizes, a zero-length packet is transferred to indicate a short transfer to the host.

sl_usbd_core_write_bulk_async#

sl_status_t sl_usbd_core_write_bulk_async (uint8_t ep_addr, void * p_buf, uint32_t buf_len, sl_usbd_async_function_t async_fnct, void * p_async_arg, bool end)

Send data on the Bulk IN endpoint asynchronously.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Transmit buffer must be 32 bits aligned.

• (2) If end-of-transfer is set and transfer length is multiple of maximum packet size, a zero-length packet is transferred to indicate a short transfer to the host.

sl_usbd_core_add_interrupt_endpoint#

sl_status_t sl_usbd_core_add_interrupt_endpoint (uint8_t config_nbr, uint8_t if_nbr, uint8_t if_alt_nbr, bool dir_in, uint16_t max_pkt_len, uint16_t interval, uint8_t * p_ep_addr)

Add an interrupt endpoint to an alternate setting interface.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) If the 'max_pkt_len' argument is '0', the stack will allocate the first available INTERRUPT endpoint, regardless its maximum packet size.

sl_usbd_core_read_interrupt_sync#

sl_status_t sl_usbd_core_read_interrupt_sync (uint8_t ep_addr, void * p_buf, uint32_t buf_len, uint16_t timeout_ms, uint32_t * p_xfer_len)

Receive data on the Interrupt OUT endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) This function SHOULD NOT be called from interrupt service routine (ISR).

• (2) Receive buffer must be 32 bits aligned.

sl_usbd_core_read_interrupt_async#

sl_status_t sl_usbd_core_read_interrupt_async (uint8_t ep_addr, void * p_buf, uint32_t buf_len, sl_usbd_async_function_t async_fnct, void * p_async_arg)

Receive data on Interrupt OUT endpoint asynchronously.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Receive buffer must be 32 bits aligned.

sl_usbd_core_write_interrupt_sync#

sl_status_t sl_usbd_core_write_interrupt_sync (uint8_t ep_addr, void * p_buf, uint32_t buf_len, uint16_t timeout_ms, bool end, uint32_t * p_xfer_len)

Send data on Interrupt IN endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) This function SHOULD NOT be called from interrupt service routine (ISR).

• (2) Transmit buffer must be 32 bits aligned.

• (3) If end-of-transfer is set and transfer length is multiple of maximum packet size, a zero-length packet is transferred to indicate a short transfer to the host.

sl_usbd_core_write_interrupt_async#

sl_status_t sl_usbd_core_write_interrupt_async (uint8_t ep_addr, void * p_buf, uint32_t buf_len, sl_usbd_async_function_t async_fnct, void * p_async_arg, bool end)

Send data on the Interrupt IN endpoint asynchronously.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Transmit buffer must be 32 bits aligned.

• (2) If end-of-transfer is set and transfer length is multiple of maximum packet size, a zero-length packet is transferred to indicate a short transfer to the host.

sl_usbd_core_endpoint_write_zlp#

sl_status_t sl_usbd_core_endpoint_write_zlp (uint8_t ep_addr, uint16_t timeout_ms, if_alt_nbr, dir_in, attrib, max_pkt_len, transaction_frame, interval, p_ep_addr)

Add an isochronous endpoint to alternate setting interface.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) If the 'max_pkt_len' argument is '0', the stack allocates the first available ISOCHRONOUS endpoint regardless of its maximum packet size.

• (2) For full-speed endpoints, 'transaction_frame' must be set to 1 since there is no support for high-bandwidth endpoints.

• (3) For full-/high-speed isochronous endpoints, bInterval value must be in the range from 1 to 16. The bInterval value is used as the exponent for a 2^(bInterval-1) value. Maximum polling interval value is 2^(16-1) = 32768 frames in full-speed and 32768 microframes (i.e., 4096 frames) in high-speed.

Receive data on an isochronous OUT endpoint asynchronously.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Receive buffer must be 32 bits aligned.

Send data on an isochronous IN endpoint asynchronously.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Transmit buffer must be 32 bits aligned.

Set synchronization feedback rate on synchronization isochronous endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Synchronization endpoints can ONLY be associated when the device is in the following states:

  • SL_USBD_DEVICE_STATE_NONE Device controller has not been initialized.

  • SL_USBD_DEVICE_STATE_INIT Device controller is already initialized.

• (2) For audio class 1.0, the interface class code must be SL_USBD_CLASS_CODE_AUDIO and protocol 'zero'

• (3) If explicit synchronization mechanism is needed to maintain synchronization during transfers, the information carried over the synchronization path must be available every 2 ^ (10 - P) frames, with P ranging from 1 to 9 (512 ms down to 2 ms).

• (4) Table 4-22 "Standard AS Isochronous Synch Endpoint Descriptor" of Audio 1.0 specification indicates for bmAttributes field no usage type for bits 5..4. But USB 2.0 specification, Table 9-13 "Standard Endpoint Descriptor" indicates several types of usage. When an explicit feedback is defined for a asynchronous isochronous endpoint, the associated synch feedback should use the Usage type 'Feedback endpoint'.

Associate synchronization endpoint to isochronous endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) Synchronization endpoints can ONLY be associated when the device is in the following states:

  • SL_USBD_DEVICE_STATE_NONE Device controller has not been initialized.

  • SL_USBD_DEVICE_STATE_INIT Device controller is already initialized.

• (2) For audio class 1.0, interface class code must be SL_USBD_CLASS_CODE_AUDIO and protocol 'zero'.

Send zero-length packet to the host.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) This function should only be called during a synchronous transfer.

sl_usbd_core_endpoint_read_zlp#

sl_status_t sl_usbd_core_endpoint_read_zlp (uint8_t ep_addr, uint16_t timeout_ms)

Receive zero-length packet from the host.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) This function should only be called during a synchronous transfer.

sl_usbd_core_abort_endpoint#

sl_status_t sl_usbd_core_abort_endpoint (uint8_t ep_addr)

Abort I/O transfer on the endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_endpoint_read_complete#

sl_status_t sl_usbd_core_endpoint_read_complete (uint8_t ep_log_nbr)

Notify USB stack that packet receive has completed.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_endpoint_write_complete#

sl_status_t sl_usbd_core_endpoint_write_complete (uint8_t ep_log_nbr)

Notify USB stack that packet transmit has completed.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_endpoint_write_complete_extended#

sl_status_t sl_usbd_core_endpoint_write_complete_extended (uint8_t ep_log_nbr, sl_status_t xfer_err)

Notify USB stack that packet transmit has completed (see Note #1).

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

Note

• (1) This function is an alternative to the function sl_usbd_core_endpoint_write_complete() so that a USB device driver can return to the core an error code upon the Tx transfer completion.

sl_usbd_core_stall_endpoint#

sl_status_t sl_usbd_core_stall_endpoint (uint8_t ep_addr, bool state)

Stall the non-control endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_is_endpoint_stalled#

sl_status_t sl_usbd_core_is_endpoint_stalled (uint8_t ep_addr, bool * p_ep_stall)

Get the stall status of a non-control endpoint.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_get_max_endpoint_packet_size#

sl_status_t sl_usbd_core_get_max_endpoint_packet_size (uint8_t ep_addr, uint16_t * p_max_size)

Retrieve the endpoint maximum packet size.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_get_max_phy_endpoint_number#

sl_status_t sl_usbd_core_get_max_phy_endpoint_number (uint8_t * p_ep_phy_nbr)

Get the maximum physical endpoint number.

Returns

• Returns SL_STATUS_OK on success or another SL_STATUS code on failure.

sl_usbd_core_get_max_open_endpoint_number#

sl_status_t sl_usbd_core_get_max_open_endpoint_number (uint8_t * p_nbr_open)

sl_usbd_on_bus_event#

__WEAK void sl_usbd_on_bus_event (sl_usbd_bus_event_t event)

sl_usbd_on_config_event#

__WEAK void sl_usbd_on_config_event (sl_usbd_config_event_t event, uint8_t config_nbr)