usb.h

基于avr,D12的U盘设计,有完整的USB1.1的协议代码.

#define uchar 	unsigned char
#define uint 	unsigned int
//STANDARD REQUEST CODES
#define GET_STATUS		0
#define	CLEAR_FEATURE	1
#define	SET_FEATURE		3
#define	SET_ADDRESS		5
#define	GET_DESCRIPTOR	6
#define	SET_DESCRIPTOR	7
#define	GET_CONFIGURATION	8
#define	SET_CONFIGURATION	9
#define	GET_INTERFACE	10
#define	SET_INTERFACE	11
#define	SYNCH_FRAME		12
//DESCRIPTOR TYPES
#define	DEVICE		1
#define	CONFIGURATION	2
#define	STRING		3
#define	INTERFACE	4
#define	ENDPOINT	5

#define	DEVICE_REMOTE_WAKEUP	1
#define	ENDPOINT_HALT			0
 
//标准设备请求命令结构

typedef struct 
{
 uchar bmRequestType;                         //请求命令类型
 uchar bRequest;                              //请求命令代码
 uint wValue;                                //命令信息
 uint wIndex;                                //索引信息
 uint wLength;                               //传输数据大小
}
REQUEST, *pREQUEST;
   

//setup_packet缓冲区

#define MAX_CONTROL_DATA_SIZE 16

typedef struct 
{
 REQUEST DeviceRequest;                    //USB设备请求
 uint wLength;
 uint wCount;
 uchar * pData;
 uchar dataBuffer[MAX_CONTROL_DATA_SIZE];
}CONTROL_DATA_BUFF;

typedef struct
{
	uchar 	bLength;
	uchar 	bDescriptorType;
	uint	bcdUSB;
	uchar	bDeviceClass;
	uchar	bDeviceSubClass;
	uchar 	bDevicePortocol;
	uchar 	bMaxPacketSize0;
	uint 	idVendor;
	uint	idProduct;
	uint	bcdDevice;
	uchar	iManufacturer;
	uchar	iProduct;
	uchar	iSerialNumber;
	uchar 	bNumConfigurations;
}
DEVICE_DESCRIPTOR,*pDEVICE_DESCRIPTOR;
typedef struct 
{
	uchar 	bLength;
	uchar 	bDescriptorType;
	uint	wTotalLength;
	uchar	bNumInterfaces;
	uchar	bConfigurationValue;
	uchar	iConfiguration;
	uchar	bmAttributes;
	uchar	MaxPower;
}
CONFIGURATION_DESCRIPTOR,*pCONFIGURATION_DESCRIPTOR;
typedef struct
{
	uchar 	bLength;
	uchar 	bDescriptorType;
	uchar 	bInterfaceNumber;
	uchar	bAlternateSetting;
	uchar	bNumEndpoints;
	uchar 	bInterfaceClass;
	uchar 	bInterfaceSubClass;
	uchar 	bInterfaceProtocol;
	uchar	iInterface;

}
INTERFACE_DESCRIPTOR,*pINTERFACE_DESCRIPTOR;
typedef struct
{
	uchar 	bLength;
	uchar 	bDescriptorType;
	uchar	bEndpointAddress;
	uchar	bmAttributes;
	uint 	wMaxPacketSize;
	uchar	bInterval;
}
ENDPOINT_DESCRIPTOR,*pENDPOINT_DESCRIPTOR;
typedef union
{
	struct
		{
			uchar timer               	: 1;		
			uchar bus_reset           	: 1;	//总线复位标志	
			uchar suspend             	: 1;	//挂起改变标志
			uchar setup_packet  	  	: 1;	//收到SETUP包
			uchar remote_wakeup		   	: 1;	//远程唤醒标志（未使用）
			uchar in_isr		      	: 1;	//USB中断服务标志
			uchar control_state			: 2;	//控制端点处理标志
													//0: IDLE	   空闲状态
													//1: TRANSMIT  数据发送状态
													//2: RECEIVE   数据接收状态
			uchar configuration			: 1;	//配置标志(0: 未配置; 1: 已经配置)
			uchar command				: 1;	//未使用	
			uchar ep1_rxdone			: 1;	//端点 1 收到数据标志
			uchar ep2_rxdone			: 1; 	//端点 2 收到数据标志
			uchar ep1buf_full			: 1;
			uchar ep2buf_full			: 1;	//端点 2 接收双缓冲区满标志
		}bits;
	uint sbyte;
}
USBFLAG;
typedef union
{
	struct 
		{
			uchar reset:1;
			uchar ctrl_out:1;
			uchar ctrl_in:1;
			uchar endp0_out:1;
			uchar endp1_in:1;
			uchar main_out:1;
			uchar main_in:1;
			uchar bus_reset:1;
			uchar hold:1;
			uchar DMA_EOT:1;
			uchar re:7;
		}int_flag;
	uint ctrl;
}D12_STATUS;

extern CONTROL_DATA_BUFF controldata;
extern USBFLAG	flag;
D12_STATUS	d12_status;