usb.h

bdm源代码. coldfire处理器用

typedef struct {    /* 16 bit value in little endian notation */
	unsigned char lo;
	unsigned char hi;
} lendian_word;

/* device descriptor */
typedef struct {
	unsigned char bLength;				    /* Size of this Descriptor in Bytes */
	unsigned char bDescriptorType;		/* Descriptor Type (=1) */
	lendian_word  bcdUSB;				      /* USB Spec Release Number in BCD */
	unsigned char bDeviceClass;			  /* Device Class Code */
	unsigned char bDeviceSubClass;		/* Device Subclass Code */	
	unsigned char bDeviceProtocol;		/* Device Protocol Code */
	unsigned char bMaxPacketSize0;		/* Maximum Packet Size for EP0 */
	lendian_word  idVendor; 			    /* Vendor ID */ 
	lendian_word  idProduct;		      /* Product ID */
	lendian_word  bcdDevice;		      /* Device Release Number in BCD */
	unsigned char iManufacturer;		  /* Index of String Desc for Manufacturer */
	unsigned char iProduct;				    /* Index of String Desc for Product */
	unsigned char iSerialNumber;		  /* Index of String Desc for SerNo */
	unsigned char bNumConfigurations;	/* Number of possible Configurations */
} device_descriptor;

/* Standard Configuration Descriptor */
typedef struct {
	unsigned char bLength;				    /* Size of this Descriptor in Bytes */
	unsigned char bDescriptorType;		/* Descriptor Type (=2) */
	lendian_word wTotalLength;			  /* Total Length of Data for this Configuration */
	unsigned char bNumInterfaces;		  /* No of Interfaces supported by this Configuration */
	unsigned char bConfigurationValue;/* Designator Value for this Configuration */
	unsigned char iConfiguration;		  /* Index of String Desc for this Configuration */
	unsigned char bmAttributes;			  /* Configuration Characteristics */
	unsigned char bMaxPower;			    /* Max. Power Consumption in this Configuration (in 2mA steps) */
} configuration_descriptor;

/* Standard Interface Descriptor */
typedef struct {
	unsigned char bLength;				    /* Size of this Descriptor in Bytes */
	unsigned char bDescriptorType;		/* Descriptor Type (=4) */
	unsigned char bInterfaceNumber;		/* Number of this Interface (0..) */
	unsigned char bAlternateSetting;	/* Alternative for this Interface (if any) */
	unsigned char bNumEndpoints;		  /* No of EPs used by this IF (excl. EP0) */
	unsigned char bInterfaceClass;		/* Interface Class Code */
	unsigned char bInterfaceSubClass;	/* Interface Subclass Code */
	unsigned char bInterfaceProtocol;	/* Interface Protocol Code */
	unsigned char iInterface;			    /* Index of String Desc for this Interface */
} interface_descriptor;

/* Standard Endpoint Descriptor */
typedef struct {
	unsigned char bLength;				    /* Size of this Descriptor in Bytes */
	unsigned char bDescriptorType;		/* Descriptor Type (=5) */
	unsigned char bEndpointAddress;		/* Endpoint Address (Number + Direction) */
	unsigned char bmAttributes;			  /* Endpoint Attributes (Transfer Type) */
	lendian_word wMaxPacketSize;	    /* Max. Endpoint Packet Size */
	unsigned char bInterval;			    /* Polling Interval (Interrupt) in ms */
} endpoint_descriptor;

/* Structure of Setup Packet sent during SETUP Stage of Standard Device Requests */
typedef struct {
	unsigned char bmRequestType;		  /* Characteristics (Direction,Type,Recipient) */
	unsigned char bRequest;				    /* Standard Request Code */
	lendian_word wValue;				      /* Value Field */
	lendian_word wIndex;				      /* Index or Offset Field */
	lendian_word wLength;				      /* Number of Bytes to transfer (Data Stage) */
} setup_packet;

/* USB Status Codes */
#define US_ATTACHED			0x00
#define US_POWERED			0x01
#define US_DEFAULT			0x02
#define US_ADDRESSED		0x03
#define US_CONFIGURED		0x04
#define US_SUSPENDED		0x80

/* USB Standard Device Request Codes */
#define GET_STATUS			0x00
#define CLEAR_FEATURE		0x01
#define SET_FEATURE			0x03
#define SET_ADDRESS			0x05
#define GET_DESCRIPTOR	0x06
#define SET_DESCRIPTOR	0x07
#define GET_CONFIGURATION	0x08
#define SET_CONFIGURATION	0x09
#define GET_INTERFACE		0x0a
#define SET_INTERFACE		0x0b
#define SYNCH_FRAME			0x0c

/* Descriptor Types */
#define DT_DEVICE 			1
#define DT_CONFIGURATION 2
#define DT_STRING	  		3
#define DT_INTERFACE		4
#define DT_ENDPOINT			5

/* Function Prototypes */
void copy(unsigned char count, unsigned char * src, unsigned char * dest);
unsigned char copystring(unsigned char index, unsigned char * dest);
void USB_ep0_tx(void);
void USB_ep2_tx(void);
void USB_ep0_rx(void);
void USB_ep2_rx(void);
void USB_Setup(void);
void interrupt usb_isr(void);
void usb_init(void);

/* shared variables */
#pragma DATA_SEG DEFAULT
#define COMMAND_BUFFER_SIZE ((MAX_DATA_SIZE)+6)
extern unsigned char command_buffer[COMMAND_BUFFER_SIZE];
extern unsigned char command_size;