关于TM4C129 中以太网连接状态的问题？

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

if(ui16Status & EPHY_STS_LINK) 

我发现以网线插入与拔出值分别为0x1116 与(0x1112 \0x1102)

但是EPHY_STS_LINK 判断的是第0位， 于是变成检测到网线都是拔出的状态！  谁能帮忙解释一下吗？

Susan Yang：

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callnetif_set_link_up 或者 netif_set_link_down 判定的

Susan Yang：

/*** 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_SUPPORTuint16_t ui16EEEStatus;
#endifuint32_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_SUPPORTui16EEEStatus = 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_SYSnetif_set_link_up(psNetif);
#elsetcpip_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_SUPPORTif(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_SYSnetif_set_link_down(psNetif);
#elsetcpip_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_SUPPORTg_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);}
}

Susan Yang：

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_SYSnetif_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);
}
}

user4346240：

回复 Susan Yang:

好的， 谢谢

user4346240：

回复 user4346240:

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