nRF52840 only: Core module that manages current USB state and process device requests. More...

Data Structures
struct	app_usbd_core_setup_data_handler_desc_t
	Variable type used to register EP0 transfer handler. More...

struct	CONCAT_2
	Declare Core instance type. More...

Macros
#define	APP_USBD_CORE_CLASS_CONFIGURATION ((0, NRF_DRV_USBD_EPOUT0, NRF_DRV_USBD_EPIN0))
	Core interface configuration. More...

#define	APP_USBD_STATE_SUSPENDED_MASK 0x80
	Suspend state mask. More...

#define	APP_USB_STATE_BASE(state) ((app_usbd_state_t)((uint32_t)(state) & (~APP_USBD_STATE_SUSPENDED_MASK)))
	Remove APP_USBD_STATE_SUSPENDED_MASK bit from core state.

Typedefs
typedef ret_code_t(*	app_usbd_core_setup_data_handler_t )(nrf_drv_usbd_ep_status_t status, void *p_context)
	EP0 handler function pointer. More...

typedef struct CONCAT_2	_data_t

Enumerations
enum	app_usbd_state_t { APP_USBD_STATE_Disabled = 0x00, APP_USBD_STATE_Unattached = 0x01, APP_USBD_STATE_Powered = 0x02, APP_USBD_STATE_Default = 0x03, APP_USBD_STATE_Addressed = 0x04, APP_USBD_STATE_Configured = 0x05, APP_USBD_STATE_SuspendedPowered = 0x80 \| APP_USBD_STATE_Powered, APP_USBD_STATE_SuspendedDefault = 0x80 \| APP_USBD_STATE_Default, APP_USBD_STATE_SuspendedAddressed = 0x80 \| APP_USBD_STATE_Addressed, APP_USBD_STATE_SuspendedConfigured = 0x80 \| APP_USBD_STATE_Configured }
	USB Device state. More...

Functions
union	CONCAT_2 (app_usbd_core, _u)

	CONCAT_2 (app_usbd_core, _t)

static app_usbd_class_inst_t const *	app_usbd_core_instance_access (void)
	Access to core instance. More...

ret_code_t	app_usbd_core_setup_rsp (app_usbd_setup_t const p_setup, void const p_data, size_t size)
	Default simple response to setup command. More...

ret_code_t	app_usbd_core_setup_data_handler_set (nrf_drv_usbd_ep_t ep, app_usbd_core_setup_data_handler_desc_t const *const p_handler_desc)
	Configure the handler for the nearest setup data endpoint transfer. More...

ret_code_t	app_usbd_core_ep_transfer (nrf_drv_usbd_ep_t ep, nrf_drv_usbd_transfer_t const *const p_transfer)
	Endpoint transfer. More...

ret_code_t	app_usbd_core_setup_data_transfer (nrf_drv_usbd_ep_t ep, nrf_drv_usbd_transfer_t const *const p_transfer)
	Setup data transfer. More...

ret_code_t	app_usbd_ep_handled_transfer (nrf_drv_usbd_ep_t ep, nrf_drv_usbd_handler_desc_t const *const p_handler)
	Set up an endpoint-handled transfer. More...

ret_code_t	app_usbd_setup_data_handled_transfer (nrf_drv_usbd_ep_t ep, nrf_drv_usbd_handler_desc_t const *const p_handler)
	Set up a data-handled transfer. More...

void *	app_usbd_core_setup_transfer_buff_get (size_t *p_size)
	Set up a data transfer buffer. More...

app_usbd_state_t	app_usbd_core_state_get (void)
	Return internal USBD core state. More...

bool	app_usbd_core_feature_state_get (app_usbd_setup_stdfeature_t feature)
	Check current feature state. More...

Detailed Description

nRF52840 only: Core module that manages current USB state and process device requests.

Macro Definition Documentation

#define APP_USBD_CORE_CLASS_CONFIGURATION ((0, NRF_DRV_USBD_EPOUT0, NRF_DRV_USBD_EPIN0))

Core interface configuration.

Core instance would have 2 endpoints (IN0 and OUT0). The interface number does not matter because it is not used.

#define APP_USBD_STATE_SUSPENDED_MASK 0x80

Suspend state mask.

Mask used to mark suspended state, suspended state remembers also the target state after wake up

Typedef Documentation

typedef ret_code_t(* app_usbd_core_setup_data_handler_t)(nrf_drv_usbd_ep_status_t status, void *p_context)

EP0 handler function pointer.

Type of the variable that would hold the pointer to the handler for endpoint 0 messages processing.

Parameters

p_contex Context variable configured with the transmission request.

Enumeration Type Documentation

enum app_usbd_state_t

USB Device state.

Possible USB Device states according to specification.

Enumerator
APP_USBD_STATE_Disabled	The whole USBD library is disabled
APP_USBD_STATE_Unattached	Device is currently not connected to the host
APP_USBD_STATE_Powered	Device is connected to the host but has not been enumerated
APP_USBD_STATE_Default	USB Reset condition detected, waiting for the address
APP_USBD_STATE_Addressed	Device has been addressed but have not been configured
APP_USBD_STATE_Configured	Device is addressed and configured
APP_USBD_STATE_SuspendedPowered	Device is Suspended and on wakeup it will return to Powered state
APP_USBD_STATE_SuspendedDefault	Device is Suspended and on wakeup it will return to Default state
APP_USBD_STATE_SuspendedAddressed	Device is Suspended and on wakeup it will return to Addressed state
APP_USBD_STATE_SuspendedConfigured	Device is Suspended and on wakeup it will return to Configured state

Function Documentation

ret_code_t app_usbd_core_ep_transfer	(	nrf_drv_usbd_ep_t	ep,
		nrf_drv_usbd_transfer_t const *const	p_transfer
	)

Endpoint transfer.

Parameters

ep	Endpoint number
p_transfer	Description of the transfer to be performed. The direction of the transfer is determined by the endpoint number.

Return values

NRF_ERROR_INVALID_STATE The state of the USB device does not allow data transfer on the endpoint.

Returns: Values returned by nrf_drv_usbd_ep_transfer

Note: This function can work only if the USB is in Configured state. See app_usbd_core_setup_data_transfer for transfers before device configuration is done.

See Also: app_usbd_core_setup_data_transfer

bool app_usbd_core_feature_state_get ( app_usbd_setup_stdfeature_t feature )

Check current feature state.

Function checks the state of the selected feature that was configured by the host.

Parameters

feature Feature to check. Only features related to the device should be checked by this function.

Return values

true	Selected feature is set
false	Selected feature is cleared

static app_usbd_class_inst_t const* app_usbd_core_instance_access ( void )

inlinestatic

Access to core instance.

Function that returns pointer to the USBD core instance.

Returns: pointer to the core instance

ret_code_t app_usbd_core_setup_data_handler_set	(	nrf_drv_usbd_ep_t	ep,
		app_usbd_core_setup_data_handler_desc_t const *const	p_handler_desc
	)

Configure the handler for the nearest setup data endpoint transfer.

This function would be called on incomming setup data. The correct place to set the handler for a data is when SETUP command was received.

Parameters

ep	Endpoint number (only IN0 and OUT0) are supported.
p_handler_desc	Descriptor of the handler to be called.

Return values

NRF_SUCCESS	Successfully configured
NRF_ERROR_INVALID_ADDR	Last received setup direction does not match configured endpoint.

ret_code_t app_usbd_core_setup_data_transfer	(	nrf_drv_usbd_ep_t	ep,
		nrf_drv_usbd_transfer_t const *const	p_transfer
	)

Setup data transfer.

Function similar to app_usbd_core_ep_transfer. The only technical diference is that it should be used with setup transfers that are going to be performed before device is configured.

Parameters

ep	See app_usbd_core_ep_transfer.
p_transfer	See app_usbd_core_ep_transfer.

Returns: The same values like app_usbd_core_ep_transfer

ret_code_t app_usbd_core_setup_rsp	(	app_usbd_setup_t const *	p_setup,
		void const *	p_data,
		size_t	size
	)

Default simple response to setup command.

This function generates default simple response. It sends ZLP when required and on takes care on allowing status stage when transfer is finished.

Parameters

p_setup	Pointer to original setup message
p_data	Pointer to the response. This has to be globaly aviable data.
size	Total size of the answer - The function takes care about limiting the size of transfered data to the size required by setup command.

void* app_usbd_core_setup_transfer_buff_get ( size_t * p_size )

Set up a data transfer buffer.

Returns special internal buffer that can be used in setup transfer.

Returns: Internal buffer pointer

app_usbd_state_t app_usbd_core_state_get ( void )

Return internal USBD core state.

Returns: Check app_usbd_state_t to find possible USBD core states

ret_code_t app_usbd_ep_handled_transfer	(	nrf_drv_usbd_ep_t	ep,
		nrf_drv_usbd_handler_desc_t const *const	p_handler
	)

Set up an endpoint-handled transfer.

Configures a transfer handled by the feedback function.

Parameters

ep	Endpoint number.
p_handler	Function called when the next chunk of data is requested.

Return values

NRF_ERROR_INVALID_STATE The state of the USB device does not allow data transfer on the endpoint.

Returns: Values returned by nrf_drv_usbd_ep_handled_transfer.

ret_code_t app_usbd_setup_data_handled_transfer	(	nrf_drv_usbd_ep_t	ep,
		nrf_drv_usbd_handler_desc_t const *const	p_handler
	)

Set up a data-handled transfer.

Function similar to app_usbd_ep_handled_transfer. The only technical diference is that it should be used with setup transfers that are performed before the device is configured.

Parameters

ep	Endpoint number
p_handler	Function called when the next chunk of data is requested.

Return values

NRF_ERROR_INVALID_STATE The state of the USB device does not allow data transfer on the endpoint.

Returns: Values returned by nrf_drv_usbd_ep_handled_transfer.

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation