关于TM4C129 中以太网连接状态的问题？

请问您现在使用的是第三方的lwip吗？TivaWare_C_Series的版本是多少？在下面的路径中

C:\ti\TivaWare_C_Series-2.1.4.178\third_party\lwip-1.4.1\ports\tiva-tm4c129\netif

的tiva-tm4c129.c内主要是靠EPHY_STS_LINK来call netif_set_link_up 或者 netif_set_link_down 判定的

/**
 * Process interrupts from the PHY.
 *
 * should be called from the Stellaris Ethernet Interrupt Handler.  This
 * function will read packets from the Stellaris Ethernet fifo and place them
 * into a pbuf queue.  If the transmitter is idle and there is at least one packet
 * on the transmit queue, it will place it in the transmit fifo and start the
 * transmitter.
 *
 */
void
tivaif_process_phy_interrupt(struct netif *psNetif)
{
    uint16_t ui16Val, ui16Status;
#if EEE_SUPPORT
    uint16_t ui16EEEStatus;
#endif
    uint32_t ui32Config, ui32Mode, ui32RxMaxFrameSize;

    /* Read the PHY interrupt status.  This clears all interrupt sources.
     * Note that we are only enabling sources in EPHY_MISR1 so we don't
     * read EPHY_MISR2.
     */
    ui16Val = EMACPHYRead(EMAC0_BASE, PHY_PHYS_ADDR, EPHY_MISR1);

    /* Read the current PHY status. */
    ui16Status = EMACPHYRead(EMAC0_BASE, PHY_PHYS_ADDR, EPHY_STS);

    /* If EEE mode support is requested then read the value of the Link
     * partners status
     */
#if EEE_SUPPORT
    ui16EEEStatus = EMACPHYMMDRead(EMAC0_BASE, PHY_PHYS_ADDR, 0x703D);
#endif

    /* Has the link status changed? */
    if(ui16Val & EPHY_MISR1_LINKSTAT)
    {
        /* Is link up or down now? */
        if(ui16Status & EPHY_STS_LINK)
        {
            /* Tell lwIP the link is up. */
#if NO_SYS
            netif_set_link_up(psNetif);
#else
            tcpip_callback((tcpip_callback_fn)netif_set_link_up, psNetif);
#endif

            /* if the link has been advertised as EEE capable then configure
             * the MAC register for LPI timers and manually set the PHY link
             * status bit
             */
#if EEE_SUPPORT
            if(ui16EEEStatus & 0x2)
            {
                EMACLPIConfig(EMAC0_BASE, true, 1000, 36);
                EMACLPILinkSet(EMAC0_BASE);
                g_bEEELinkActive = true;
            }
#endif

            /* In this case we drop through since we may need to reconfigure
             * the MAC depending upon the speed and half/fui32l-duplex settings.
             */
        }
        else
        {
            /* Tell lwIP the link is down */
#if NO_SYS
            netif_set_link_down(psNetif);
#else
            tcpip_callback((tcpip_callback_fn)netif_set_link_down, psNetif);
#endif

            /* if the link has been advertised as EEE capable then clear the
             * MAC register LPI timers and manually clear the PHY link status
             * bit
             */
#if EEE_SUPPORT
           	g_bEEELinkActive = false;
           	EMACLPILinkClear(EMAC0_BASE);
           	EMACLPIConfig(EMAC0_BASE, false, 1000, 0);
#endif
        }
    }

    /* Has the speed or duplex status changed? */
    if(ui16Val & (EPHY_MISR1_SPEED | EPHY_MISR1_SPEED | EPHY_MISR1_ANC))
    {
        /* Get the current MAC configuration. */
        EMACConfigGet(EMAC0_BASE, &ui32Config, &ui32Mode,
                        &ui32RxMaxFrameSize);

        /* What speed is the interface running at now?
         */
        if(ui16Status & EPHY_STS_SPEED)
        {
            /* 10Mbps is selected */
            ui32Config &= ~EMAC_CONFIG_100MBPS;
        }
        else
        {
            /* 100Mbps is selected */
            ui32Config |= EMAC_CONFIG_100MBPS;
        }

        /* Are we in fui32l- or half-duplex mode? */
        if(ui16Status & EPHY_STS_DUPLEX)
        {
            /* Fui32l duplex. */
            ui32Config |= EMAC_CONFIG_FULL_DUPLEX;
        }
        else
        {
            /* Half duplex. */
            ui32Config &= ~EMAC_CONFIG_FULL_DUPLEX;
        }

        /* Reconfigure the MAC */
        EMACConfigSet(EMAC0_BASE, ui32Config, ui32Mode, ui32RxMaxFrameSize);
    }
}

下面的补丁是之前一个网友测试过的，您可以试一下

void
tivaif_process_phy_interrupt(struct netif *psNetif)
{
uint16_t ui16Val, ui16Status;
uint32_t ui32Config, ui32Mode, ui32RxMaxFrameSize;

/* Read the PHY interrupt status. This clears all interrupt sources.
* Note that we are only enabling sources in EPHY_MISR1 so we don't
* read EPHY_MISR2.
*/
ui16Val = EMACPHYRead(EMAC0_BASE, PHY_PHYS_ADDR, EPHY_MISR1);

/* Read the current PHY status. */
ui16Status = EMACPHYRead(EMAC0_BASE, PHY_PHYS_ADDR, EPHY_STS);

/* Has the link status changed? */
if(ui16Val & EPHY_MISR1_LINKSTAT)
{

/* Is link up or down now? */
if(ui16Status & EPHY_STS_LINK)
{

/* Tell lwIP the link is up. */
#if NO_SYS 
netif_set_link_up(psNetif);
#else
tcpip_callback((tcpip_callback_fn)netif_set_link_up, psNetif);
#endif

/* In this case we drop through since we may need to reconfigure
* the MAC depending upon the speed and half/fui32l-duplex settings.
*/
}
else
{
// HERE IS MY FIX
/* fix link status bit error by reading Basic Mode Status register*/
EMACPHYRead(EMAC0_BASE, PHY_PHYS_ADDR, EPHY_BMSR);
// END OF MY FIX

/* Tell lwIP the link is down */
#if NO_SYS
netif_set_link_down(psNetif);
#else
tcpip_callback((tcpip_callback_fn)netif_set_link_down, psNetif);
#endif
}
}

/* Has the speed or duplex status changed? */
if(ui16Val & (EPHY_MISR1_SPEED | EPHY_MISR1_SPEED | EPHY_MISR1_ANC))
{
/* Get the current MAC configuration. */
EMACConfigGet(EMAC0_BASE, &ui32Config, &ui32Mode,
&ui32RxMaxFrameSize);

/* What speed is the interface running at now?
*/
if(ui16Status & EPHY_STS_SPEED)
{
/* 10Mbps is selected */
ui32Config &= ~EMAC_CONFIG_100MBPS;
}
else
{
/* 100Mbps is selected */
ui32Config |= EMAC_CONFIG_100MBPS;
}

/* Are we in fui32l- or half-duplex mode? */
if(ui16Status & EPHY_STS_DUPLEX)
{
/* Fui32l duplex. */
ui32Config |= EMAC_CONFIG_FULL_DUPLEX;
}
else
{
/* Half duplex. */
ui32Config &= ~EMAC_CONFIG_FULL_DUPLEX;
}

/* Reconfigure the MAC */
EMACConfigSet(EMAC0_BASE, ui32Config, ui32Mode, ui32RxMaxFrameSize);
}
}

好的， 谢谢

目前我是一到if(ui16Val & EPHY_MISR1_LINKSTAT)就进行重新连接，而不管是否是连接与非连接了

补丁和原文好像只有以下的差距，况且数据手册上是第二位LINKSTAT判断网线连接状态，而不是第0位exten功能，TI的驱动库是否有错？？？
#if EEE_SUPPORT
ui16EEEStatus = EMACPHYMMDRead(EMAC0_BASE, PHY_PHYS_ADDR, 0x703D);
#endif

#if EEE_SUPPORT
ui16EEEStatus = EMACPHYMMDRead(EMAC0_BASE, PHY_PHYS_ADDR, 0x703D);
#endif
补丁和原来的是否只有上述的区别，况且数据手册上写的是第2位为linkstat,而不是第0位的exten,TI的驱动库是否有错？

这个问题在英文E2E上也有研究，您可以看一下

e2e.ti.com/.../2359748

e2e.ti.com/.../1909843