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USB Protocol Definitions
USB Stack

This module defines constants and data structures provided by the USB 2.0 specification.

Modules

 USB Human Interface Device (HID)
 protocol definitions
 

Data Structures

struct  usb_association_desc_t
 Standard USB Interface Association Descriptor structure. More...
 
struct  usb_conf_desc_t
 Standard USB configuration descriptor structure. More...
 
struct  usb_dev_bos_desc_t
 USB Device BOS descriptor structure. More...
 
struct  usb_dev_capa_ext_desc_t
 USB Device Capabilities - USB 2.0 Extension Descriptor structure. More...
 
struct  usb_dev_desc_t
 Standard USB device descriptor structure. More...
 
struct  usb_dev_lpm_desc_t
 USB Device LPM Descriptor structure. More...
 
struct  usb_dev_qual_desc_t
 Standard USB device qualifier descriptor structure. More...
 
struct  usb_ep_desc_t
 Standard USB endpoint descriptor structure. More...
 
struct  usb_iad_desc_t
 Standard USB association descriptor structure. More...
 
struct  usb_iface_desc_t
 Standard USB interface descriptor structure. More...
 
struct  usb_setup_req_t
 A USB Device SETUP request. More...
 
struct  usb_str_desc_t
 A standard USB string descriptor structure. More...
 
struct  usb_str_lgid_desc_t
 

Macros

#define HIRD_1025_US   13
 
#define HIRD_1100_US   14
 
#define HIRD_1175_US   15
 
#define HIRD_125_US   1
 
#define HIRD_200_US   2
 
#define HIRD_275_US   3
 
#define HIRD_350_US   4
 
#define HIRD_425_US   5
 
#define HIRD_500_US   6
 
#define HIRD_50_US   0
 
#define HIRD_575_US   7
 
#define HIRD_650_US   8
 
#define HIRD_725_US   9
 
#define HIRD_800_US   10
 
#define HIRD_875_US   11
 
#define HIRD_950_US   12
 
#define USB_CONFIG_ATTR_BUS_POWERED   (0 << 6)
 Bus-powered. More...
 
#define USB_CONFIG_ATTR_MUST_SET   (1 << 7)
 Must always be set. More...
 
#define USB_CONFIG_ATTR_REMOTE_WAKEUP   (1 << 5)
 remote wakeup supported More...
 
#define USB_CONFIG_ATTR_SELF_POWERED   (1 << 6)
 Self-powered. More...
 
#define USB_CONFIG_MAX_POWER(ma)   (((ma) + 1) / 2)
 Max power in mA. More...
 
#define USB_EP_ADDR_MASK   0x0f
 Mask selecting the index part of an endpoint address. More...
 
#define USB_EP_DIR_IN   0x80
 Endpoint transfer direction is IN. More...
 
#define USB_EP_DIR_OUT   0x00
 Endpoint transfer direction is OUT. More...
 
#define USB_LPM_ATTRIBUT_BLINKSTATE(value)   ((value & 0xF) << 0)
 
#define USB_LPM_ATTRIBUT_BLINKSTATE_L1   USB_LPM_ATTRIBUT_BLINKSTATE(1)
 
#define USB_LPM_ATTRIBUT_BLINKSTATE_MASK   (0xF << 0)
 Fields definition from a LPM TOKEN. More...
 
#define USB_LPM_ATTRIBUT_FIRD(value)   ((value & 0xF) << 4)
 
#define USB_LPM_ATTRIBUT_FIRD_MASK   (0xF << 4)
 
#define USB_LPM_ATTRIBUT_REMOTEWAKE(value)   ((value & 1) << 8)
 
#define USB_LPM_ATTRIBUT_REMOTEWAKE_MASK   (1 << 8)
 
#define USB_MAX_DESC_LEN   255
 Maximum length in bytes of a USB descriptor. More...
 
#define USB_REQ_DIR_IN   (1<<7)
 Device to host. More...
 
#define USB_REQ_DIR_MASK   (1<<7)
 Mask. More...
 
#define USB_REQ_DIR_OUT   (0<<7)
 USB request data transfer direction (bmRequestType) More...
 
#define USB_REQ_RECIP_DEVICE   (0<<0)
 USB recipient codes (bmRequestType) More...
 
#define USB_REQ_RECIP_ENDPOINT   (2<<0)
 Recipient endpoint. More...
 
#define USB_REQ_RECIP_INTERFACE   (1<<0)
 Recipient interface. More...
 
#define USB_REQ_RECIP_MASK   (0x1F)
 Mask. More...
 
#define USB_REQ_RECIP_OTHER   (3<<0)
 Recipient other. More...
 
#define USB_REQ_TYPE_CLASS   (1<<5)
 Class-specific request. More...
 
#define USB_REQ_TYPE_MASK   (3<<5)
 Mask. More...
 
#define USB_REQ_TYPE_STANDARD   (0<<5)
 USB request types (bmRequestType) More...
 
#define USB_REQ_TYPE_VENDOR   (2<<5)
 Vendor-specific request. More...
 
#define USB_V2_0   0x0200
 Value for field bcdUSB. More...
 
#define USB_V2_1   0x0201
 USB Specification version 2.01. More...
 

Typedefs

typedef uint8_t usb_add_t
 USB address identifier. More...
 
typedef uint8_t usb_ep_t
 Endpoint identifier. More...
 

Enumerations

enum  usb_capability_extension_attr { USB_DC_EXT_LPM = 0x00000002 }
 USB Device Capability - USB 2.0 Extension To fill bmAttributes field of usb_capa_ext_desc_t structure. More...
 
enum  usb_capability_type { USB_DC_USB20_EXTENSION = 0x02 }
 USB Device Capability types. More...
 
enum  usb_descriptor_type {
  USB_DT_DEVICE = 1,
  USB_DT_CONFIGURATION = 2,
  USB_DT_STRING = 3,
  USB_DT_INTERFACE = 4,
  USB_DT_ENDPOINT = 5,
  USB_DT_DEVICE_QUALIFIER = 6,
  USB_DT_OTHER_SPEED_CONFIGURATION = 7,
  USB_DT_INTERFACE_POWER = 8,
  USB_DT_OTG = 9,
  USB_DT_IAD = 0x0B,
  USB_DT_BOS = 0x0F,
  USB_DT_DEVICE_CAPABILITY = 0x10
}
 Standard USB descriptor types. More...
 
enum  usb_device_feature {
  USB_DEV_FEATURE_REMOTE_WAKEUP = 1,
  USB_DEV_FEATURE_TEST_MODE = 2,
  USB_DEV_FEATURE_OTG_B_HNP_ENABLE = 3,
  USB_DEV_FEATURE_OTG_A_HNP_SUPPORT = 4,
  USB_DEV_FEATURE_OTG_A_ALT_HNP_SUPPORT = 5
}
 Standard USB device feature flags. More...
 
enum  usb_device_hs_test_mode {
  USB_DEV_TEST_MODE_J = 1,
  USB_DEV_TEST_MODE_K = 2,
  USB_DEV_TEST_MODE_SE0_NAK = 3,
  USB_DEV_TEST_MODE_PACKET = 4,
  USB_DEV_TEST_MODE_FORCE_ENABLE = 5
}
 Test Mode possible on HS USB device. More...
 
enum  usb_device_status {
  USB_DEV_STATUS_BUS_POWERED = 0,
  USB_DEV_STATUS_SELF_POWERED = 1,
  USB_DEV_STATUS_REMOTEWAKEUP = 2
}
 Standard USB device status flags. More...
 
enum  usb_endpoint_feature { USB_EP_FEATURE_HALT = 0 }
 Standard USB endpoint feature/status flags. More...
 
enum  usb_endpoint_status { USB_EP_STATUS_HALTED = 1 }
 Standard USB endpoint status flags. More...
 
enum  usb_ep_type {
  USB_EP_TYPE_CONTROL = 0x00,
  USB_EP_TYPE_ISOCHRONOUS = 0x01,
  USB_EP_TYPE_BULK = 0x02,
  USB_EP_TYPE_INTERRUPT = 0x03,
  USB_EP_TYPE_MASK = 0x03
}
 Standard USB endpoint transfer types. More...
 
enum  usb_interface_status { USB_IFACE_STATUS_RESERVED = 0 }
 Standard USB Interface status flags. More...
 
enum  usb_langid { USB_LANGID_EN_US = 0x0409 }
 Standard USB language IDs for string descriptors. More...
 
enum  usb_reqid {
  USB_REQ_GET_STATUS = 0,
  USB_REQ_CLEAR_FEATURE = 1,
  USB_REQ_SET_FEATURE = 3,
  USB_REQ_SET_ADDRESS = 5,
  USB_REQ_GET_DESCRIPTOR = 6,
  USB_REQ_SET_DESCRIPTOR = 7,
  USB_REQ_GET_CONFIGURATION = 8,
  USB_REQ_SET_CONFIGURATION = 9,
  USB_REQ_GET_INTERFACE = 10,
  USB_REQ_SET_INTERFACE = 11,
  USB_REQ_SYNCH_FRAME = 12
}
 Standard USB requests (bRequest) More...
 
enum  usb_test_mode_selector {
  USB_TEST_J = 0x01,
  USB_TEST_K = 0x02,
  USB_TEST_SE0_NAK = 0x03,
  USB_TEST_PACKET = 0x04,
  USB_TEST_FORCE_ENABLE = 0x05
}
 Standard USB Test Mode Selectors. More...
 

Generic definitions (Class, subclass and protocol)

#define NO_CLASS   0x00
 
#define CLASS_VENDOR_SPECIFIC   0xFF
 
#define NO_SUBCLASS   0x00
 
#define NO_PROTOCOL   0x00
 

IAD (Interface Association Descriptor) constants

#define CLASS_IAD   0xEF
 
#define SUB_CLASS_IAD   0x02
 
#define PROTOCOL_IAD   0x01
 

#define CLASS_IAD   0xEF
#define CLASS_VENDOR_SPECIFIC   0xFF
#define HIRD_1025_US   13
#define HIRD_1100_US   14
#define HIRD_1175_US   15
#define HIRD_125_US   1
#define HIRD_200_US   2
#define HIRD_275_US   3
#define HIRD_350_US   4
#define HIRD_425_US   5
#define HIRD_500_US   6
#define HIRD_50_US   0
#define HIRD_575_US   7
#define HIRD_650_US   8
#define HIRD_725_US   9
#define HIRD_800_US   10
#define HIRD_875_US   11
#define HIRD_950_US   12
#define NO_CLASS   0x00
#define NO_PROTOCOL   0x00
#define NO_SUBCLASS   0x00
#define PROTOCOL_IAD   0x01
#define SUB_CLASS_IAD   0x02
#define USB_CONFIG_ATTR_BUS_POWERED   (0 << 6)

Bus-powered.

#define USB_CONFIG_ATTR_MUST_SET   (1 << 7)

Must always be set.

#define USB_CONFIG_ATTR_REMOTE_WAKEUP   (1 << 5)

remote wakeup supported

#define USB_CONFIG_ATTR_SELF_POWERED   (1 << 6)

Self-powered.

#define USB_CONFIG_MAX_POWER (   ma)    (((ma) + 1) / 2)

Max power in mA.

#define USB_EP_ADDR_MASK   0x0f

Mask selecting the index part of an endpoint address.

Referenced by udd_ep_abort(), udd_ep_abort_job(), udd_ep_alloc(), udd_ep_clear_halt(), udd_ep_free(), udd_ep_is_halted(), udd_ep_run(), udd_ep_set_halt(), and udd_ep_wait_stall_clear().

#define USB_EP_DIR_IN   0x80

Endpoint transfer direction is IN.

Referenced by udd_ep_abort(), udd_ep_alloc(), udd_ep_finish_job(), and udd_ep_set_halt().

#define USB_EP_DIR_OUT   0x00

Endpoint transfer direction is OUT.

#define USB_LPM_ATTRIBUT_BLINKSTATE (   value)    ((value & 0xF) << 0)
#define USB_LPM_ATTRIBUT_BLINKSTATE_L1   USB_LPM_ATTRIBUT_BLINKSTATE(1)
#define USB_LPM_ATTRIBUT_BLINKSTATE_MASK   (0xF << 0)

Fields definition from a LPM TOKEN.

#define USB_LPM_ATTRIBUT_FIRD (   value)    ((value & 0xF) << 4)
#define USB_LPM_ATTRIBUT_FIRD_MASK   (0xF << 4)
#define USB_LPM_ATTRIBUT_REMOTEWAKE (   value)    ((value & 1) << 8)
#define USB_LPM_ATTRIBUT_REMOTEWAKE_MASK   (1 << 8)
#define USB_MAX_DESC_LEN   255

Maximum length in bytes of a USB descriptor.

The maximum length of a USB descriptor is limited by the 8-bit bLength field.

#define USB_REQ_DIR_IN   (1<<7)

Device to host.

#define USB_REQ_DIR_MASK   (1<<7)

Mask.

#define USB_REQ_DIR_OUT   (0<<7)

USB request data transfer direction (bmRequestType)

Host to device

#define USB_REQ_RECIP_DEVICE   (0<<0)

USB recipient codes (bmRequestType)

Recipient device

Referenced by udc_reqstd().

#define USB_REQ_RECIP_ENDPOINT   (2<<0)

Recipient endpoint.

Referenced by udc_process_setup(), and udc_reqstd().

#define USB_REQ_RECIP_INTERFACE   (1<<0)

Recipient interface.

Referenced by udc_process_setup(), and udc_reqstd().

#define USB_REQ_RECIP_MASK   (0x1F)

Mask.

#define USB_REQ_RECIP_OTHER   (3<<0)

Recipient other.

#define USB_REQ_TYPE_CLASS   (1<<5)

Class-specific request.

Referenced by udi_hid_setup().

#define USB_REQ_TYPE_MASK   (3<<5)

Mask.

#define USB_REQ_TYPE_STANDARD   (0<<5)

USB request types (bmRequestType)

Standard request

Referenced by udc_process_setup(), and udi_hid_setup().

#define USB_REQ_TYPE_VENDOR   (2<<5)

Vendor-specific request.

#define USB_V2_0   0x0200

Value for field bcdUSB.

USB Specification version 2.00

#define USB_V2_1   0x0201

USB Specification version 2.01.

typedef uint8_t usb_add_t

USB address identifier.

typedef uint8_t usb_ep_t

Endpoint identifier.

enum usb_capability_extension_attr

USB Device Capability - USB 2.0 Extension To fill bmAttributes field of usb_capa_ext_desc_t structure.

Enumerator
USB_DC_EXT_LPM 
enum usb_capability_type

USB Device Capability types.

Enumerator
USB_DC_USB20_EXTENSION 
enum usb_descriptor_type

Standard USB descriptor types.

Enumerator
USB_DT_DEVICE 
USB_DT_CONFIGURATION 
USB_DT_STRING 
USB_DT_INTERFACE 
USB_DT_ENDPOINT 
USB_DT_DEVICE_QUALIFIER 
USB_DT_OTHER_SPEED_CONFIGURATION 
USB_DT_INTERFACE_POWER 
USB_DT_OTG 
USB_DT_IAD 
USB_DT_BOS 
USB_DT_DEVICE_CAPABILITY 
enum usb_device_feature

Standard USB device feature flags.

Note
valid for SetFeature request.
Enumerator
USB_DEV_FEATURE_REMOTE_WAKEUP 

Remote wakeup enabled.

USB_DEV_FEATURE_TEST_MODE 

USB test mode.

USB_DEV_FEATURE_OTG_B_HNP_ENABLE 
USB_DEV_FEATURE_OTG_A_HNP_SUPPORT 
USB_DEV_FEATURE_OTG_A_ALT_HNP_SUPPORT 
enum usb_device_hs_test_mode

Test Mode possible on HS USB device.

Note
valid for USB_DEV_FEATURE_TEST_MODE request.
Enumerator
USB_DEV_TEST_MODE_J 
USB_DEV_TEST_MODE_K 
USB_DEV_TEST_MODE_SE0_NAK 
USB_DEV_TEST_MODE_PACKET 
USB_DEV_TEST_MODE_FORCE_ENABLE 
enum usb_device_status

Standard USB device status flags.

Enumerator
USB_DEV_STATUS_BUS_POWERED 
USB_DEV_STATUS_SELF_POWERED 
USB_DEV_STATUS_REMOTEWAKEUP 
enum usb_endpoint_feature

Standard USB endpoint feature/status flags.

Enumerator
USB_EP_FEATURE_HALT 
enum usb_endpoint_status

Standard USB endpoint status flags.

Enumerator
USB_EP_STATUS_HALTED 
enum usb_ep_type

Standard USB endpoint transfer types.

Enumerator
USB_EP_TYPE_CONTROL 
USB_EP_TYPE_ISOCHRONOUS 
USB_EP_TYPE_BULK 
USB_EP_TYPE_INTERRUPT 
USB_EP_TYPE_MASK 
enum usb_interface_status

Standard USB Interface status flags.

Enumerator
USB_IFACE_STATUS_RESERVED 
enum usb_langid

Standard USB language IDs for string descriptors.

Enumerator
USB_LANGID_EN_US 

English (United States)

enum usb_reqid

Standard USB requests (bRequest)

Enumerator
USB_REQ_GET_STATUS 
USB_REQ_CLEAR_FEATURE 
USB_REQ_SET_FEATURE 
USB_REQ_SET_ADDRESS 
USB_REQ_GET_DESCRIPTOR 
USB_REQ_SET_DESCRIPTOR 
USB_REQ_GET_CONFIGURATION 
USB_REQ_SET_CONFIGURATION 
USB_REQ_GET_INTERFACE 
USB_REQ_SET_INTERFACE 
USB_REQ_SYNCH_FRAME 
enum usb_test_mode_selector

Standard USB Test Mode Selectors.

Enumerator
USB_TEST_J 
USB_TEST_K 
USB_TEST_SE0_NAK 
USB_TEST_PACKET 
USB_TEST_FORCE_ENABLE 
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