USB UTG固件问题

oolyl123 提问时间：2010-6-1 18:09 /

USB_OTG_int_msk_data gintmsk = {.d32 = 0}
这句话语法怎么理解呢？？？

typedef union _USB_OTG_int_msk_data
{
uint32_t d32;
struct
{
uint32_t reserved0 :
    1;
uint32_t modemismatch :
    1;
uint32_t otgintr :
    1;
uint32_t sofintr :
    1;
uint32_t rxstsqlvl :
    1;
uint32_t nptxfempty :
    1;
uint32_t ginnakeff :
    1;
uint32_t goutnakeff :
    1;
uint32_t reserved8 :
    1;
uint32_t i2cintr :
    1;
uint32_t erlysuspend :
    1;
uint32_t usbsuspend :
    1;
uint32_t usbreset :
    1;
uint32_t enumdone :
    1;
uint32_t isooutdrop :
    1;
uint32_t eopframe :
    1;
uint32_t reserved16 :
    1;
uint32_t epmismatch :
    1;
uint32_t inepintr :
    1;
uint32_t outepintr :
    1;
uint32_t incomplisoin :
    1;
uint32_t incomplisoout :
    1;
uint32_t reserved22_23 :
    2;
uint32_t portintr :
    1;
uint32_t hcintr :
    1;
uint32_t ptxfempty :
    1;
uint32_t reserved27 :
    1;
uint32_t conidstschng :
    1;
uint32_t disconnect :
    1;
uint32_t sessreqintr :
    1;
uint32_t wkupintr :
    1;
}
b;
} USB_OTG_int_msk_data;