global.h

基于USB接口的GPS驱动程序.gps后段接受以及输出,及usp驱动读写

#define USB_DEFAULT                      0    /* No descriptor read*/
#define USB_DESCRIPTOR_READ              1    /* Descriptor read, Addr not assigned*/
#define USB_ADDRESS_ASSIGNED             2    /* Descriptor Read, Addr assigned*/
#define USB_CONFIGURED                   3

/*GLOBAL STATUS VALUES*/
#define STD_COMMAND                      0x00
#define SETUP_COMMAND_PHASE              0x40
#define FUNCTION_ERROR                   0x7F  /* Used when we are stalling the function EP0 */
#define HUB_ERROR                        0xFF  /* Used when we are stalling the HUB EP0 */

/*1.0 bRequest Values*/

#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
#define REQ_DONE                    0xFF    /*private code: request done*/

 /*Descriptor Types*/
#define DEVICE                      1
#define CONFIGURATION               2
#define XSTRING                     3
#define INTERFACE                   4
#define ENDPOINT                    5

/*
//Recipient Selectors/Masks
*/

#define           RECIPIENT_MASK        0x1F
#define           DEVICE_RECIPIENT      0
#define           INTERFACE_RECIPIENT   1
#define           ENDPOINT_RECIPIENT    2
#define           OTHER_RECIPIENT       3


/*
//Feature Selectors
*/


#define         DEVICE_REMOTE_WAKEUP   0x01
#define         ENDPOINT_STALL         0x00


/*
//Equates for masking registers, addresses, and counters
*/

extern bit TOGGLE_Hub;