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标题: M487 网口 DHCP 获取IP地址失败的问题 [打印本页]

作者: 578886174@qq.co 时间: 5 天前
标题: M487 网口 DHCP 获取IP地址失败的问题
本帖最后由 578886174@qq.co 于 2025-12-22 09:50 编辑

使用EMAC_TxRx例程

地址修改为0
#define EMAC_PHY_ADDR 0UL /*!< PHY address, this address is board dependent \hideinitializer */

没有成功获取到IP地址

[2025-12-22 09:45:52.048]# RECV ASCII>
EMAC sample code start

[2025-12-22 09:45:55.208]# RECV ASCII>
DHCP DISCOVER...

[2025-12-22 09:45:55.473]# RECV ASCII>
DHCP DISCOVER retry: 1

[2025-12-22 09:45:55.741]# RECV ASCII>
DHCP DISCOVER retry: 2

[2025-12-22 09:45:55.990]# RECV ASCII>
DHCP DISCOVER retry: 3

[2025-12-22 09:45:56.271]# RECV ASCII>
DHCP DISCOVER retry: 4

[2025-12-22 09:45:56.520]# RECV ASCII>
DHCP DISCOVER retry: 5

[2025-12-22 09:45:56.801]# RECV ASCII>
DHCP DISCOVER retry: 6

[2025-12-22 09:45:57.049]# RECV ASCII>
DHCP DISCOVER retry: 7

[2025-12-22 09:45:57.314]# RECV ASCII>
DHCP DISCOVER retry: 8

[2025-12-22 09:45:57.581]# RECV ASCII>
DHCP DISCOVER retry: 9

[2025-12-22 09:45:57.833]# RECV ASCII>
DHCP DISCOVER retry: 10

[2025-12-22 09:45:58.112]# RECV ASCII>
DHCP DISCOVER retry: 11

[2025-12-22 09:45:58.365]# RECV ASCII>
DHCP DISCOVER retry: 12

[2025-12-22 09:45:58.627]# RECV ASCII>
DHCP DISCOVER retry: 13

[2025-12-22 09:45:58.892]# RECV ASCII>
DHCP DISCOVER retry: 14

[2025-12-22 09:45:59.156]# RECV ASCII>
DHCP DISCOVER retry: 15

[2025-12-22 09:45:59.424]# RECV ASCII>
DHCP failed, use static IP 192.168.10.10

企业微信截图_20251222095020_8720.png (121.8 KB, 下载次数: 6)

企业微信截图_20251222094842_mcu.png (159.28 KB, 下载次数: 6)

作者: chrishu 时间: 3 天前
你重新插拔一下网线之类的看看。都不行的话，将程序里的固定IP改成和电脑统一网段，连接在同一个路由器上，再用电脑去ping一下。
还是不行，得看一PHY初始化是否正确EMAC_PhyInit。
然后检查PHY的连接

作者: 匿名 时间: 昨天 10:36
int32_t EMAC_PhyInit(void)
{
uint32_t u32Reg;
uint32_t u32Delay;

g_EMAC_i32ErrCode = 0;

/* Reset Phy Chip */
EMAC_MdioWrite(PHY_CNTL_REG, EMAC_PHY_ADDR, PHY_CNTL_RESET_PHY);

/* Wait until PHY reset complete.
   Report error if the reset status is not cleared for more than 0.1 second */
u32Delay = SystemCoreClock / 10;
while (--u32Delay)
{
      u32Reg = EMAC_MdioRead(PHY_CNTL_REG, EMAC_PHY_ADDR) ;

      if ((u32Reg & PHY_CNTL_RESET_PHY) == 0UL)
      {
         break;
      }
}
if(u32Delay == 0)
{
      goto error;
}

u32Delay = SystemCoreClock;  // Wait 1 second. Report error if link valid is not set
while (!(EMAC_MdioRead(PHY_STATUS_REG, EMAC_PHY_ADDR) & PHY_STATUS_LINK_VALID))
{
      if (--u32Delay == 0)    /* Cable not connected */
      {
         goto error;
      }
}

/* Configure auto negotiation capability */
EMAC_MdioWrite(PHY_ANA_REG, EMAC_PHY_ADDR, PHY_ANA_DR100_TX_FULL |
               PHY_ANA_DR100_TX_HALF |
               PHY_ANA_DR10_TX_FULL |
               PHY_ANA_DR10_TX_HALF |
               PHY_ANA_IEEE_802_3_CSMA_CD);
/* Restart auto negotiation */
EMAC_MdioWrite(PHY_CNTL_REG, EMAC_PHY_ADDR, EMAC_MdioRead(PHY_CNTL_REG, EMAC_PHY_ADDR) | PHY_CNTL_RESTART_AN);

/* Wait for auto-negotiation complete
   Report error if auto-negotiation is not complete in 2 seconds */
u32Delay = SystemCoreClock * 2;
while (!(EMAC_MdioRead(PHY_STATUS_REG, EMAC_PHY_ADDR) & PHY_STATUS_AN_COMPLETE))
{
      if (--u32Delay == 0)
      {
         goto error;
      }
}

/* Check link valid again. There're some PHY chips need to re-check link valid
   bit set after auto-t-negotiation complete before check partner capability.
   Report error if link valid is not set after 1 second */
u32Delay = SystemCoreClock;
while (!(EMAC_MdioRead(PHY_STATUS_REG, EMAC_PHY_ADDR) & PHY_STATUS_LINK_VALID))
{
      if (--u32Delay == 0)
      {
         goto error;
      }
}

/* Check link partner capability */
u32Reg = EMAC_MdioRead(PHY_ANLPA_REG, EMAC_PHY_ADDR) ;

if (u32Reg & PHY_ANLPA_DR100_TX_FULL)
{
      EMAC->CTL |= EMAC_CTL_OPMODE_Msk;
      EMAC->CTL |= EMAC_CTL_FUDUP_Msk;
}
else if (u32Reg & PHY_ANLPA_DR100_TX_HALF)
{
      EMAC->CTL |= EMAC_CTL_OPMODE_Msk;
      EMAC->CTL &= ~EMAC_CTL_FUDUP_Msk;
}
else if (u32Reg & PHY_ANLPA_DR10_TX_FULL)
{
      EMAC->CTL &= ~EMAC_CTL_OPMODE_Msk;
      EMAC->CTL |= EMAC_CTL_FUDUP_Msk;
}
else
{
      EMAC->CTL &= ~EMAC_CTL_OPMODE_Msk;
      EMAC->CTL &= ~EMAC_CTL_FUDUP_Msk;
}
return 0;

error:
EMAC->CTL &= ~EMAC_CTL_OPMODE_Msk;
EMAC->CTL &= ~EMAC_CTL_FUDUP_Msk;
return EMAC_TIMEOUT_ERR;
}
EMAC_PhyInit用的是官方例程的EMAC_TxRx
程序是由官方例程修改的，只改了地址EMAC_PHY_ADDR修改为0
还有哪些需要修改的呢？
我试了一下DHCP不行，但是能接收到UDP广播的数据，硬件应该配置成功了吧

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