USB MSC internals

nRF5 SDK v15.2.0
Data Structures | Macros | Typedefs | Enumerations | Functions | Variables

nRF52840 only: Internals of the USB MSC class. More...

Data Structures

struct app_usbd_msc_inst_t
MSC part of class instance data. More...
struct app_usbd_msc_ctx_t
MSC context. More...

Macros

#define APP_USBD_MSC_MINIMAL_SERIAL_STRING_SIZE (12 + 1)
Minimal serial string descriptor length.
#define APP_USBD_MSC_BUFFER_CNT 2
Number of block buffers. More...
#define APP_USBD_MSC_BUFFER_NAME (instance_name) CONCAT_2 (instance_name, _block)
Create the name of the block buffer. More...
#define APP_USBD_MSC_BLKDEVS_NAME (instance_name) CONCAT_2 (instance_name, _blkdevs)
Create the name of the block device list. More...
#define APP_USBD_MSC_CONFIG (iface, endpoints)   ((iface, BRACKET_EXTRACT (endpoints)))
MSC configuration macro. More...
#define APP_USBD_MSC_INSTANCE_SPECIFIC_DEC app_usbd_msc_inst_t inst;
Specific class constant data for MSC. More...
#define APP_USBD_MSC_INST_CONFIG (p_devs,devs_cnt,p_buff,block_size,block_cnt,user_event_handler)
Configures MSC instance. More...
#define APP_USBD_MSC_DATA_SPECIFIC_DEC app_usbd_msc_ctx_t ctx;
Specific class data for MSC. More...
#define APP_USBD_MSC_DSC_CONFIG (interface_number,...)
MSC descriptors config macro. More...
#define APP_USBD_MSC_GLOBAL_DEF_INTERNAL (instance_name,interface_number,user_ev_handler,endpoint_list,blockdev_list,workbuffer_size)
Global definition of mass storage class instance. More...

Typedefs

typedef void(* app_usbd_msc_user_ev_handler_t )( app_usbd_class_inst_t const *p_inst, enum app_usbd_msc_user_event_e event)
User event handler. More...

Enumerations

enum app_usbd_msc_state_t {
APP_USBD_MSC_STATE_DISABLED ,
APP_USBD_MSC_STATE_IDLE ,
APP_USBD_MSC_STATE_CBW ,
APP_USBD_MSC_STATE_CMD_IN ,
APP_USBD_MSC_STATE_DATA_IN ,
APP_USBD_MSC_STATE_DATA_OUT ,
APP_USBD_MSC_STATE_CSW ,
APP_USBD_MSC_STATE_UNSUPPORTED ,
APP_USBD_MSC_STATE_CBW_INVALID ,
APP_USBD_MSC_STATE_DEVICE_ERROR
}
Internal module state. More...

Functions

APP_USBD_CLASS_FORWARD (app_usbd_msc)
Forward declaration of Mass Storage Class type.

Variables

const app_usbd_class_methods_t app_usbd_msc_class_methods
Public MSC class interface.

Detailed Description

nRF52840 only: Internals of the USB MSC class.

Macro Definition Documentation

#define APP_USBD_MSC_BLKDEVS_NAME ( instance_name ) CONCAT_2 (instance_name, _blkdevs)

Create the name of the block device list.

Parameters
instance_name The name of the MSC instance
Returns
The name of the block device list
#define APP_USBD_MSC_BUFFER_CNT   2

Number of block buffers.

Number of buffers used for the transfer. The library is designed to work with double buffering. Not tested with other configuration.

#define APP_USBD_MSC_BUFFER_NAME ( instance_name ) CONCAT_2 (instance_name, _block)

Create the name of the block buffer.

Parameters
instance_name The name of the MSC instance
Returns
The name of the block buffer used with the instance
#define APP_USBD_MSC_CONFIG ( iface,
endpoints
) ((iface, BRACKET_EXTRACT (endpoints)))

MSC configuration macro.

Used by APP_USBD_MSC_GLOBAL_DEF

Parameters
iface Interface number.
endpoints Endpoint list.
#define APP_USBD_MSC_DATA_SPECIFIC_DEC app_usbd_msc_ctx_t ctx;

Specific class data for MSC.

app_usbd_msc_ctx_t

#define APP_USBD_MSC_DSC_CONFIG ( interface_number,
...
)
Value:
{ \
APP_USBD_MSC_INTERFACE_DSC(interface_number, \
APP_USBD_MSC_SUBCLASS_TRANSPARENT , \
APP_USBD_MSC_PROTOCOL_BULK ) \
APP_USBD_MSC_EP_DSC( GET_VA_ARG_1 (__VA_ARGS__), \
GET_VA_ARG_1 ( GET_ARGS_AFTER_1 (__VA_ARGS__)), \
64) \
}

MSC descriptors config macro.

Parameters
interface_number Interface number.
... Extracted endpoint list.
#define APP_USBD_MSC_GLOBAL_DEF_INTERNAL ( instance_name,
interface_number,
user_ev_handler,
endpoint_list,
blockdev_list,
workbuffer_size
)
Value:
static const nrf_block_dev_t * APP_USBD_MSC_BLKDEVS_NAME (instance_name)[] = \
{ BRACKET_EXTRACT (blockdev_list) }; \
static uint32_t APP_USBD_MSC_BUFFER_NAME (instance_name) \
[ APP_USBD_MSC_BUFFER_CNT * CEIL_DIV (workbuffer_size, sizeof (uint32_t))]; \
APP_USBD_CLASS_INST_GLOBAL_DEF( \
instance_name, \
app_usbd_msc, \
& app_usbd_msc_class_methods , \
APP_USBD_MSC_CONFIG (interface_number, endpoint_list), \
( APP_USBD_MSC_INST_CONFIG ( APP_USBD_MSC_BLKDEVS_NAME (instance_name), \
ARRAY_SIZE( APP_USBD_MSC_BLKDEVS_NAME (instance_name)), \
APP_USBD_MSC_BUFFER_NAME (instance_name), \
sizeof ( APP_USBD_MSC_BUFFER_NAME (instance_name)) \
/ APP_USBD_MSC_BUFFER_CNT , \
APP_USBD_MSC_BUFFER_CNT , \
user_ev_handler)) \
)

Global definition of mass storage class instance.

#define APP_USBD_MSC_INST_CONFIG ( p_devs,
devs_cnt,
p_buff,
block_size,
block_cnt,
user_event_handler
)
Value:
.inst = { \
.pp_block_devs = (p_devs), \
.block_devs_count = (devs_cnt), \
.p_block_buff = (p_buff), \
.block_buff_size = (block_size), \
.block_buff_count = (block_cnt), \
.user_ev_handler = (user_event_handler), \
.subclass = APP_USBD_MSC_SUBCLASS_TRANSPARENT , \
.protocol = APP_USBD_MSC_PROTOCOL_BULK , \
}

Configures MSC instance.

Parameters
p_devs Block devices list that is array of pointers of nrf_block_dev_t type.
devs_cnt Number of block devices connected.
p_buff Block buffer.
block_size Total size of the single block in the buffer.
block_cnt Number of available block buffers.
user_event_handler User event handler.
#define APP_USBD_MSC_INSTANCE_SPECIFIC_DEC app_usbd_msc_inst_t inst;

Specific class constant data for MSC.

app_usbd_msc_inst_t

Typedef Documentation

typedef void(* app_usbd_msc_user_ev_handler_t)( app_usbd_class_inst_t const *p_inst, enum app_usbd_msc_user_event_e event)

User event handler.

Parameters
[in] p_inst Class instance.
[in] event User event.

Enumeration Type Documentation

enum app_usbd_msc_state_t

Internal module state.

Enumerator
APP_USBD_MSC_STATE_DISABLED

Internal module state DISABLED

APP_USBD_MSC_STATE_IDLE

Internal module state IDLE

APP_USBD_MSC_STATE_CBW

Internal module state CBW

APP_USBD_MSC_STATE_CMD_IN

Internal module state CMD_IN

APP_USBD_MSC_STATE_DATA_IN

Internal module state DATA_IN

APP_USBD_MSC_STATE_DATA_OUT

Internal module state DATA_OUT

APP_USBD_MSC_STATE_CSW

Internal module state CSW

APP_USBD_MSC_STATE_UNSUPPORTED

Internal module state UNSUPPORTED

APP_USBD_MSC_STATE_CBW_INVALID

Endpoint is stalled until the command APP_USBD_MSC_REQ_BULK_RESET

APP_USBD_MSC_STATE_DEVICE_ERROR

Endpoint is stalled and it is required to send PE error when clearing