V7-1008_RL-TCPnet V7.X实验_TCP客户端（RTX5)例程疑问

Devil_920 · 发表于 2023-4-18 23:28:12

硬汉哥好：

我用这个例程，然后将以太网的驱动更换成了LAN8720，串口一直提示没有link up，
1、例程中好像没有去自动协商；
2、是不是哪里还要使能，才可以让PYH link up

PHY_LAN8720.c中，这段代码我加了自动协商。

static int32_t PowerControl (ARM_POWER_STATE state) {
  uint16_t val;

  switch ((int32_t)state) {
case ARM_POWER_OFF:
   if ((PHY.flags & PHY_INIT) == 0U) {
      /* Initialize must provide register access function pointers */
      return ARM_DRIVER_ERROR;
   }

   PHY.flags &= ~PHY_POWER;
   PHY.bmcr =  BMCR_POWER_DOWN;

   return (PHY.reg_wr(ETH_PHY_ADDR, REG_BMCR, PHY.bmcr));

case ARM_POWER_FULL:
   if ((PHY.flags & PHY_INIT) == 0U) {
      return ARM_DRIVER_ERROR;
   }
   if (PHY.flags & PHY_POWER) {
      return ARM_DRIVER_OK;
   }

   /* Check Device Identification. */
   PHY.reg_rd(ETH_PHY_ADDR, REG_PHYIDR1, &val);

   if (val != PHY_ID1) {
      /* Invalid PHY ID */
      return ARM_DRIVER_ERROR_UNSUPPORTED;
   }

   PHY.reg_rd(ETH_PHY_ADDR, REG_PHYIDR2, &val);

   if ((val & 0xFFF0) != PHY_ID2) {
      /* Invalid PHY ID */
      return ARM_DRIVER_ERROR_UNSUPPORTED;
   }

   PHY.bmcr = 0U;

   if (PHY.reg_wr(ETH_PHY_ADDR, REG_BMCR, PHY.bmcr) != ARM_DRIVER_OK) {
      return ARM_DRIVER_ERROR;
   }

   PHY.flags |=  PHY_POWER;
   SetMode(ARM_ETH_PHY_AUTO_NEGOTIATE);
   return ARM_DRIVER_OK;

case ARM_POWER_LOW:
default:
   return ARM_DRIVER_ERROR_UNSUPPORTED;
  }
}