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usb.h
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usb.h
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// USB standard request codes
#define mGET_STATUS 0
#define mCLR_FEATURE 1
#define mSET_FEATURE 3
#define mSET_ADDRESS 5
#define mGET_DESC 6
#define mSET_DESC 7
#define mGET_CONFIG 8
#define mSET_CONFIG 9
#define mGET_INTF 10
#define mSET_INTF 11
#define mSYNC_FRAME 12
// USB descriptor types
#define mDEVICE 1
#define mCONFIGURATION 2
#define mSTRING 3
#define mINTERFACE 4
#define mENDPOINT 5
#define mDEVICE_QUALIFIER 6
#define mOTHER_SPEED_CONFIGURATION 7
#define mINTERFACE_POWER 8
// USB setup packet structure (assumes compiler is little endian!)
typedef struct {
uint8_t bmRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
} USB_SETUP;
// Device descriptor
typedef struct {
uint8_t bLength;
uint8_t bDscType;
uint16_t bcdUSB;
uint8_t bDevCls;
uint8_t bDevSubCls;
uint8_t bDevProtocol;
uint8_t bMaxPktSize0;
uint16_t idVendor;
uint16_t idProduct;
uint16_t bcdDevice;
uint8_t iMFR;
uint8_t iProduct;
uint8_t iSerialNum;
uint8_t bNumCfg;
} __attribute__((packed)) USB_DEV_DSC;
// Configuration descriptor
typedef struct {
uint8_t bLength;
uint8_t bDscType;
uint16_t wTotalLength;
uint8_t bNumIntf;
uint8_t bCfgValue;
uint8_t iCfg;
uint8_t bmAttributes;
uint8_t bMaxPower;
} __attribute__((packed)) USB_CFG_DSC;
// Interface descriptor
typedef struct {
uint8_t bLength;
uint8_t bDscType;
uint8_t bIntfNum;
uint8_t bAltSetting;
uint8_t bNumEPs;
uint8_t bIntfCls;
uint8_t bIntfSubCls;
uint8_t bIntfProtocol;
uint8_t iIntf;
} __attribute__((packed)) USB_INTF_DSC;
// Endpoint descriptor
typedef struct {
uint8_t bLength;
uint8_t bDscType;
uint8_t bEPAdr;
uint8_t bmAttributes;
uint16_t wMaxPktSize;
uint8_t bInterval;
} __attribute__((packed)) USB_EP_DSC;
// --------------------------------------------------------------------------------------
#define CDC_COMM_INTF_ID 0x00
#define CDC_COMM_UEP UEP2
#define CDC_INT_BD_IN ep2Bi
#define CDC_INT_EP_SIZE 8
#define CDC_DATA_INTF_ID 0x01
#define CDC_DATA_UEP UEP3
#define CDC_BULK_BD_OUT ep3Bo
#define CDC_BULK_OUT_EP_SIZE 8
#define CDC_BULK_BD_IN ep3Bi
#define CDC_BULK_IN_EP_SIZE 8
/* Class-Specific Requests */
#define SEND_ENCAPSULATED_COMMAND 0x00
#define GET_ENCAPSULATED_RESPONSE 0x01
#define SET_COMM_FEATURE 0x02
#define GET_COMM_FEATURE 0x03
#define CLEAR_COMM_FEATURE 0x04
#define SET_LINE_CODING 0x20
#define GET_LINE_CODING 0x21
#define SET_CONTROL_LINE_STATE 0x22
#define SEND_BREAK 0x23
/* Notifications *
* Note: Notifications are polled over
* Communication Interface (Interrupt Endpoint)
*/
#define NETWORK_CONNECTION 0x00
#define RESPONSE_AVAILABLE 0x01
#define SERIAL_STATE 0x20
/* Device Class Code */
#define CDC_DEVICE 0x02
/* Communication Interface Class Code */
#define COMM_INTF 0x02
/* Communication Interface Class SubClass Codes */
#define ABSTRACT_CONTROL_MODEL 0x02
/* Communication Interface Class Control Protocol Codes */
#define V25TER 0x01 // Common AT commands ("Hayes(TM)")
/* Data Interface Class Codes */
#define DATA_INTF 0x0A
/* Data Interface Class Protocol Codes */
#define NO_PROTOCOL 0x00 // No class specific protocol required
/* Communication Feature Selector Codes */
#define ABSTRACT_STATE 0x01
#define COUNTRY_SETTING 0x02
/* Functional Descriptors */
/* Type Values for the bDscType Field */
#define CS_INTERFACE 0x24
#define CS_ENDPOINT 0x25
/* bDscSubType in Functional Descriptors */
#define DSC_FN_HEADER 0x00
#define DSC_FN_CALL_MGT 0x01
#define DSC_FN_ACM 0x02 // ACM - Abstract Control Management
#define DSC_FN_DLM 0x03 // DLM - Direct Line Managment
#define DSC_FN_TELEPHONE_RINGER 0x04
#define DSC_FN_RPT_CAPABILITIES 0x05
#define DSC_FN_UNION 0x06
#define DSC_FN_COUNTRY_SELECTION 0x07
#define DSC_FN_TEL_OP_MODES 0x08
#define DSC_FN_USB_TERMINAL 0x09
/* more.... see Table 25 in USB CDC Specification 1.1 */
/* CDC Bulk IN transfer states */
#define CDC_TX_READY 0
#define CDC_TX_BUSY 1
#define CDC_TX_BUSY_ZLP 2 // ZLP: Zero Length Packet
#define CDC_TX_COMPLETING 3
/* Line Coding Structure */
#define LINE_CODING_LENGTH 0x07
/* Functional Descriptor Structure - See CDC Specification 1.1 for details */
// CDC header functional descriptor
typedef struct _USB_CDC_HEADER_FN_DSC {
uint8_t bFNLength;
uint8_t bDscType;
uint8_t bDscSubType;
uint16_t bcdCDC;
} __attribute__((packed)) USB_CDC_HEADER_FN_DSC;
// CDC Abstract Control Management Functional Descriptor
typedef struct _USB_CDC_ACM_FN_DSC {
uint8_t bFNLength;
uint8_t bDscType;
uint8_t bDscSubType;
uint8_t bmCapabilities;
} __attribute__((packed)) USB_CDC_ACM_FN_DSC;
// CDC Union Functional Descriptor
typedef struct _USB_CDC_UNION_FN_DSC {
uint8_t bFNLength;
uint8_t bDscType;
uint8_t bDscSubType;
uint8_t bMasterIntf;
uint8_t bSaveIntf0;
} __attribute__((packed)) USB_CDC_UNION_FN_DSC;
// CDC Call Management Functional Descriptor
typedef struct _USB_CDC_CALL_MGT_FN_DSC {
uint8_t bFNLength;
uint8_t bDscType;
uint8_t bDscSubType;
uint8_t bmCapabilities;
uint8_t bDataInterface;
} __attribute__((packed)) USB_CDC_CALL_MGT_FN_DSC;