#elif(PHY_TYPE == DP83848)
#define PHY_SR 16U /*!< tranceiver status register */
#define PHY_SPEED_STATUS ((uint16_t)0x0002 /*!< configured information of speed: 10Mbit/s */
#define PHY_DUPLEX_STATUS ((uint16_t)0x0004) /*!< configured information of duplex: full-duplex */
想固定使用10M 半双工, PHY_DUPLEX_STATUS ((uint16_t)0x0004) 这部分要怎么改?