usbdrv.h

采用atmel公司的mega8芯片设计的USB cdc类

 * tiny memory model.
 */
extern unsigned usbCrc16Append(unsigned data, uchar len);
#define usbCrc16Append(data, len)    usbCrc16Append((unsigned)(data), len)
/* This function is equivalent to usbCrc16() above, except that it appends
 * the 2 bytes CRC (lowbyte first) in the 'data' buffer after reading 'len'
 * bytes.
 */
extern uchar    usbConfiguration;
/* This value contains the current configuration set by the host. The driver
 * allows setting and querying of this variable with the USB SET_CONFIGURATION
 * and GET_CONFIGURATION requests, but does not use it otherwise.
 * You may want to reflect the "configured" status with a LED on the device or
 * switch on high power parts of the circuit only if the device is configured.
 */
#define USB_STRING_DESCRIPTOR_HEADER(stringLength) ((2*(stringLength)+2) | (3<<8))
/* This macro builds a descriptor header for a string descriptor given the
 * string's length. See usbdrv.c for an example how to use it.
 */
#if USB_CFG_SERIAL_NUMBER_LENGTH
extern PROGMEM int  usbCfgSerialNumberStringDescriptor[];
/* This array of unicode characters (prefixed by a string descriptor header as
 * explained above) represents the serial number of the device.
 */
#endif /* USB_CFG_SERIAL_NUMBER_LENGTH */

#if USB_CFG_HAVE_FLOWCONTROL
extern volatile schar   usbRxLen;
#define usbDisableAllRequests()     usbRxLen = -1
/* Must be called from usbFunctionWrite(). This macro disables all data input
 * from the USB interface. Requests from the host are answered with a NAK
 * while they are disabled.
 */
#define usbEnableAllRequests()      usbRxLen = 0
/* May only be called if requests are disabled. This macro enables input from
 * the USB interface after it has been disabled with usbDisableAllRequests().
 */
#define usbAllRequestsAreDisabled() (usbRxLen < 0)
/* Use this macro to find out whether requests are disabled. It may be needed
 * to ensure that usbEnableAllRequests() is never called when requests are
 * enabled.
 */
#endif

#if USB_CFG_EXTERNAL_CONFIG_DESCRIPTOR_LENGH
extern PROGMEM char usbDescrConfig[];
#endif

extern uchar    usbTxPacketCnt1;
extern uchar    usbTxPacketCnt3;
/* The two variables above are mostly for internal use by the driver. You may
 * have to reset usbTxPacketCnt1 to 0 if you start data toggling at DATA0 for
 * interrupt-IN endpoint 1 and usbTxPacketCnt3 for interrupt-IN endpoint 3
 * respectively.
 */

#endif  /* __ASSEMBLER__ */

/* ------------------------------------------------------------------------- */
/* ------------------------ General Purpose Macros ------------------------- */
/* ------------------------------------------------------------------------- */

#define OD_CONCAT(a, b)             a ## b
#define OD_CONCAT_EXPANDED(a, b)    OD_CONCAT(a, b)

#define USB_OUTPORT(name)           OD_CONCAT(PORT, name)
#define USB_INPORT(name)            OD_CONCAT(PIN, name)
#define USB_DDRPORT(name)           OD_CONCAT(DDR, name)
/* The double-define trick above lets us concatenate strings which are
 * defined by macros.
 */

/* ------------------------------------------------------------------------- */
/* ------------------------- Constant definitions -------------------------- */
/* ------------------------------------------------------------------------- */

#if !defined USB_CFG_VENDOR_ID || !defined USB_CFG_DEVICE_ID
#warning "You should define USB_CFG_VENDOR_ID and USB_CFG_DEVICE_ID in usbconfig.h"
#warning "Using default values depending on device class."
#endif

/* make sure we have a VID and PID defined, byte order is lowbyte, highbyte */
#ifndef USB_CFG_VENDOR_ID
#   define  USB_CFG_VENDOR_ID   0xc0, 0x16  /* 5824 in dec, stands for VOTI */
#endif

#ifndef USB_CFG_DEVICE_ID
#   if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH
#       define USB_CFG_DEVICE_ID    0xdf, 0x05  /* 1503 in dec, shared PID for HIDs */
#   elif USB_CFG_INTERFACE_CLASS == 2
#       define USB_CFG_DEVICE_ID    0xe1, 0x05  /* 1505 in dec, shared PID for CDC Modems */
#   else
#       define USB_CFG_DEVICE_ID    0xdc, 0x05  /* 1500 in dec, obdev's free PID */
#   endif
#endif

#ifndef USB_BUFFER_SECTION
#   define  USB_BUFFER_SECTION  ".bss"      /* if user has not selected a named section */
#endif

/* Derive Output, Input and DataDirection ports from port names */
#ifndef USB_CFG_IOPORTNAME
#error "You must define USB_CFG_IOPORTNAME in usbconfig.h, see usbconfig-prototype.h"
#endif

#define USBOUT          USB_OUTPORT(USB_CFG_IOPORTNAME)
#define USB_PULLUP_OUT  USB_OUTPORT(USB_CFG_PULLUP_IOPORTNAME)
#define USBIN           USB_INPORT(USB_CFG_IOPORTNAME)
#define USBDDR          USB_DDRPORT(USB_CFG_IOPORTNAME)
#define USB_PULLUP_DDR  USB_DDRPORT(USB_CFG_PULLUP_IOPORTNAME)

#define USBMINUS    USB_CFG_DMINUS_BIT
#define USBIDLE     (1<<USB_CFG_DMINUS_BIT) /* value representing J state */
#define USBMASK     ((1<<USB_CFG_DPLUS_BIT) | (1<<USB_CFG_DMINUS_BIT))  /* mask for USB I/O bits */

/* defines for backward compatibility with older driver versions: */
#define USB_CFG_IOPORT          USB_OUTPORT(USB_CFG_IOPORTNAME)
#ifdef USB_CFG_PULLUP_IOPORTNAME
#define USB_CFG_PULLUP_IOPORT   USB_OUTPORT(USB_CFG_PULLUP_IOPORTNAME)
#endif


#define USB_BUFSIZE     11  /* PID, 8 bytes data, 2 bytes CRC */

/* ----- Try to find registers and bits responsible for ext interrupt 0 ----- */

#ifndef USB_INTR_CFG    /* allow user to override our default */
#   if defined  EICRA
#       define USB_INTR_CFG EICRA
#   else
#       define USB_INTR_CFG MCUCR
#   endif
#endif
#ifndef USB_INTR_CFG_SET    /* allow user to override our default */
#   define USB_INTR_CFG_SET ((1 << ISC00) | (1 << ISC01))    /* cfg for rising edge */
#endif
#ifndef USB_INTR_CFG_CLR    /* allow user to override our default */
#   define USB_INTR_CFG_CLR 0    /* no bits to clear */
#endif

#ifndef USB_INTR_ENABLE     /* allow user to override our default */
#   if defined GIMSK
#       define USB_INTR_ENABLE  GIMSK
#   elif defined EIMSK
#       define USB_INTR_ENABLE  EIMSK
#   else
#       define USB_INTR_ENABLE  GICR
#   endif
#endif
#ifndef USB_INTR_ENABLE_BIT /* allow user to override our default */
#   define USB_INTR_ENABLE_BIT  INT0
#endif

#ifndef USB_INTR_PENDING    /* allow user to override our default */
#   if defined  EIFR
#       define USB_INTR_PENDING EIFR
#   else
#       define USB_INTR_PENDING GIFR
#   endif
#endif
#ifndef USB_INTR_PENDING_BIT    /* allow user to override our default */
#   define USB_INTR_PENDING_BIT INTF0
#endif

/*
The defines above don't work for the following chips
at90c8534: no ISC0?, no PORTB, can't find a data sheet
at86rf401: no PORTB, no MCUCR etc, low clock rate
atmega103: no ISC0? (maybe omission in header, can't find data sheet)
atmega603: not defined in avr-libc
at43usb320, at43usb355, at76c711: have USB anyway
at94k: is different...

at90s1200, attiny11, attiny12, attiny15, attiny28: these have no RAM
*/

/* ------------------------------------------------------------------------- */
/* ----------------- USB Specification Constants and Types ----------------- */
/* ------------------------------------------------------------------------- */

/* USB Token values */
#define USBPID_SETUP    0x2d
#define USBPID_OUT      0xe1
#define USBPID_IN       0x69
#define USBPID_DATA0    0xc3
#define USBPID_DATA1    0x4b

#define USBPID_ACK      0xd2
#define USBPID_NAK      0x5a
#define USBPID_STALL    0x1e

#ifndef __ASSEMBLER__
typedef union usbWord{
    unsigned    word;
    uchar       bytes[2];
}usbWord_t;

typedef struct usbRequest{
    uchar       bmRequestType;
    uchar       bRequest;
    usbWord_t   wValue;
    usbWord_t   wIndex;
    usbWord_t   wLength;
}usbRequest_t;
/* This structure matches the 8 byte setup request */
#endif

/* bmRequestType field in USB setup:
 * d t t r r r r r, where
 * d ..... direction: 0=host->device, 1=device->host
 * t ..... type: 0=standard, 1=class, 2=vendor, 3=reserved
 * r ..... recipient: 0=device, 1=interface, 2=endpoint, 3=other
 */

/* USB setup recipient values */
#define USBRQ_RCPT_MASK         0x1f
#define USBRQ_RCPT_DEVICE       0
#define USBRQ_RCPT_INTERFACE    1
#define USBRQ_RCPT_ENDPOINT     2

/* USB request type values */
#define USBRQ_TYPE_MASK         0x60
#define USBRQ_TYPE_STANDARD     (0<<5)
#define USBRQ_TYPE_CLASS        (1<<5)
#define USBRQ_TYPE_VENDOR       (2<<5)

/* USB direction values: */
#define USBRQ_DIR_MASK              0x80
#define USBRQ_DIR_HOST_TO_DEVICE    (0<<7)
#define USBRQ_DIR_DEVICE_TO_HOST    (1<<7)

/* USB Standard Requests */
#define USBRQ_GET_STATUS        0
#define USBRQ_CLEAR_FEATURE     1
#define USBRQ_SET_FEATURE       3
#define USBRQ_SET_ADDRESS       5
#define USBRQ_GET_DESCRIPTOR    6
#define USBRQ_SET_DESCRIPTOR    7
#define USBRQ_GET_CONFIGURATION 8
#define USBRQ_SET_CONFIGURATION 9
#define USBRQ_GET_INTERFACE     10
#define USBRQ_SET_INTERFACE     11
#define USBRQ_SYNCH_FRAME       12

/* USB descriptor constants */
#define USBDESCR_DEVICE         1
#define USBDESCR_CONFIG         2
#define USBDESCR_STRING         3
#define USBDESCR_INTERFACE      4
#define USBDESCR_ENDPOINT       5
#define USBDESCR_HID            0x21
#define USBDESCR_HID_REPORT     0x22
#define USBDESCR_HID_PHYS       0x23

#define USBATTR_BUSPOWER        0x80
#define USBATTR_SELFPOWER       0x40
#define USBATTR_REMOTEWAKE      0x20

/* USB HID Requests */
#define USBRQ_HID_GET_REPORT    0x01
#define USBRQ_HID_GET_IDLE      0x02
#define USBRQ_HID_GET_PROTOCOL  0x03
#define USBRQ_HID_SET_REPORT    0x09
#define USBRQ_HID_SET_IDLE      0x0a
#define USBRQ_HID_SET_PROTOCOL  0x0b

/* ------------------------------------------------------------------------- */

#endif /* __usbdrv_h_included__ */