以太网问题卡在了自动协商。。。。。有代码

小花和翠花 · 发表于 2021-8-27 16:21:08

ErrStatus enet_init(enet_mediamode_enum mediamode, enet_chksumconf_enum checksum, enet_frmrecept_enum recept)
{
uint32_t reg_value=0U, reg_temp = 0U, temp = 0U;
uint32_t media_temp = 0U;
uint32_t timeout = 0U;
uint16_t phy_value = 0U;
ErrStatus phy_state= ERROR, enet_state = ERROR;

/* PHY interface configuration, configure SMI clock and reset PHY chip */
if(ERROR == enet_phy_config()){
      _ENET_DELAY_(PHY_RESETDELAY);
      if(ERROR == enet_phy_config()){
         return enet_state;
      }
}
/* initialize ENET peripheral with generally concerned parameters */
enet_default_init();

/* 1st, configure mediamode */
media_temp = (uint32_t)mediamode;
/* if is PHY auto negotiation */
if((uint32_t)ENET_AUTO_NEGOTIATION == media_temp){
      /* wait for PHY_LINKED_STATUS bit be set */
      do{
         enet_phy_write_read(ENET_PHY_READ, PHY_ADDRESS, PHY_REG_BSR, &phy_value);
         phy_value &= PHY_LINKED_STATUS;
         timeout++;
      }while((RESET == phy_value) && (timeout < PHY_READ_TO));
      /* return ERROR due to timeout */
      if(PHY_READ_TO == timeout){
          return enet_state;
      }
      /* reset timeout counter */
      timeout = 0U;

      /* enable auto-negotiation */
      phy_value = PHY_AUTONEGOTIATION;
      phy_state = enet_phy_write_read(ENET_PHY_WRITE, PHY_ADDRESS, PHY_REG_BCR, &phy_value);
      if(!phy_state){
         /* return ERROR due to write timeout */
         return enet_state;
      }

      /* wait for the PHY_AUTONEGO_COMPLETE bit be set */
      do{
         enet_phy_write_read(ENET_PHY_READ, PHY_ADDRESS, PHY_REG_BSR, &phy_value);
         phy_value &= PHY_AUTONEGO_COMPLETE;
         timeout++;
      }while((RESET == phy_value) && (timeout < (uint32_t)PHY_READ_TO));
      /* return ERROR due to timeout */
      if(PHY_READ_TO == timeout){
         return enet_state;
      }
      /* reset timeout counter */
      timeout = 0U;