[参考译文] MCU-PLUS-SDK-AM263X：使用 lwip 通过 EST 进行数据传输

// Josh
static void EnetApp_portLinkStatusChangeCb(Enet_MacPort macPort,
                                           bool isLinkUp,
                                           void *appArg)
{
    EnetAppUtils_print("MAC Port %u: link %s\r\n",
                       ENET_MACPORT_ID(macPort), isLinkUp ? "up" : "down");
}

static void EnetApp_mdioLinkStatusChange(Cpsw_MdioLinkStateChangeInfo *info,
                                         void *appArg)
{
    static uint32_t linkUpCount = 0U;

    if ((info->linkChanged) && (info->isLinked))
    {
        linkUpCount++;
    }
}

static void EnetApp_initCpswCfg(Cpsw_Cfg *cpswCfg)
{
    CpswAle_Cfg *aleCfg = &cpswCfg->aleCfg;
    CpswHostPort_Cfg *hostPortCfg = &cpswCfg->hostPortCfg;
    CpswCpts_Cfg *cptsCfg = &cpswCfg->cptsCfg;

    /* Peripheral-level config */
    cpswCfg->mdioLinkStateChangeCb     = EnetApp_mdioLinkStatusChange;
    cpswCfg->mdioLinkStateChangeCbArg  = NULL;
    cpswCfg->portLinkStatusChangeCb    = &EnetApp_portLinkStatusChangeCb;
    cpswCfg->portLinkStatusChangeCbArg = NULL;
    cpswCfg->vlanCfg.vlanAware         = true;

    /* ALE config */
    aleCfg->modeFlags                          = CPSW_ALE_CFG_MODULE_EN;
    aleCfg->agingCfg.autoAgingEn               = true;
    aleCfg->agingCfg.agingPeriodInMs           = 1000U;
    aleCfg->nwSecCfg.vid0ModeEn                = true;
    aleCfg->vlanCfg.aleVlanAwareMode           = TRUE;
    aleCfg->vlanCfg.cpswVlanAwareMode          = cpswCfg->vlanCfg.vlanAware;
    aleCfg->vlanCfg.unknownUnregMcastFloodMask = CPSW_ALE_ALL_PORTS_MASK;
    aleCfg->vlanCfg.unknownRegMcastFloodMask   = CPSW_ALE_ALL_PORTS_MASK;
    aleCfg->vlanCfg.unknownVlanMemberListMask  = CPSW_ALE_ALL_PORTS_MASK;
    aleCfg->policerGlobalCfg.policingEn        = false;

    /* Host port config */
    hostPortCfg->removeCrc         = true;
    hostPortCfg->padShortPacket    = true;
    hostPortCfg->passCrcErrors     = false;
    /* Hardware switch priority is taken from packet's PCP or DSCP */
    hostPortCfg->rxVlanRemapEn     = true;
    hostPortCfg->rxDscpIPv4RemapEn = true;
    hostPortCfg->rxDscpIPv6RemapEn = true;

    /* CPTS config (CPTS_RFT_CLK = 200MHz) */
    cptsCfg->cptsRftClkFreq = CPSW_CPTS_RFTCLK_FREQ_200MHZ;
}

static int32_t LwipApp_init(Enet_Type enetType)
{
    int32_t status = ENET_SOK;
    EnetMcm_InitConfig enetMcmCfg;
    Cpsw_Cfg cpswCfg;
#if (ENET_ENABLE_PER_ICSSG == 1)
    Icssg_Cfg icssgCfg;
#endif
    EnetRm_ResCfg *resCfg = &cpswCfg.resCfg;
    EnetCpdma_Cfg dmaCfg;


    EnetApp_getEnetInstInfo(&gLwipIfCbObj.enetType,
                            &gLwipIfCbObj.instId,
                            gLwipIfCbObj.macPortList,
                            &gLwipIfCbObj.numMacPorts);

    EnetAppUtils_assert(gLwipIfCbObj.enetType == enetType);

    /* Set configuration parameters */
    if (Enet_isCpswFamily(gLwipIfCbObj.enetType))
    {
        cpswCfg.dmaCfg = (void *)&dmaCfg;
        Enet_initCfg(gLwipIfCbObj.enetType, gLwipIfCbObj.instId, &cpswCfg, sizeof(cpswCfg));
        EnetApp_initCpswCfg(&cpswCfg);   // Josh
        EnetApp_getCpswInitCfg(gLwipIfCbObj.enetType, gLwipIfCbObj.instId, &cpswCfg);

        EnetAppUtils_assert(EnetAppUtils_isDescCached() == false);
        dmaCfg.isCacheable = false;
        dmaCfg.rxInterruptPerMSec = 8;
        dmaCfg.txInterruptPerMSec = 2;

        enetMcmCfg.perCfg = &cpswCfg;
        resCfg = &cpswCfg.resCfg;
    }
#if (ENET_ENABLE_PER_ICSSG == 1)
    else
    {
        Enet_initCfg(gLwipIfCbObj.enetType, gLwipIfCbObj.instId, &icssgCfg, sizeof(icssgCfg));

        /* Currently we only support one ICSSG port in NIMU */
        EnetAppUtils_assert(gLwipIfCbObj.numMacPorts == 1U);

        resCfg = &icssgCfg.resCfg;
        icssgCfg.dmaCfg = (void *)&dmaCfg;

        enetMcmCfg.perCfg = &icssgCfg;
    }
#else
    else
    {
        enetMcmCfg.perCfg = NULL;
    }
#endif

    EnetAppUtils_assert(NULL != enetMcmCfg.perCfg);
    EnetAppUtils_initResourceConfig(gLwipIfCbObj.enetType, EnetSoc_getCoreId(), resCfg);

    enetMcmCfg.enetType           = gLwipIfCbObj.enetType;
    enetMcmCfg.instId             = gLwipIfCbObj.instId;
    enetMcmCfg.setPortLinkCfg     = EnetApp_initLinkArgs;
    enetMcmCfg.numMacPorts        = gLwipIfCbObj.numMacPorts;
    enetMcmCfg.periodicTaskPeriod = ENETPHY_FSM_TICK_PERIOD_MS; /* msecs */
    enetMcmCfg.print              = EnetAppUtils_print;

    memcpy(&enetMcmCfg.macPortList[0U], &gLwipIfCbObj.macPortList[0U], sizeof(enetMcmCfg.macPortList));
    status = EnetMcm_init(&enetMcmCfg);

    return status;
}