Exemplo n.º 1
0
/**
 * Creates task to feed data from interrupt to lwIP, 
 * initializes EMAC0, then initializes lwIP
 */
void init_ethernet(void){/*{{{*/

    { // Enable Ethernet hardware/*{{{*/
        uint32_t user0, user1;
        /**
         * Enable ethernet
         * See page 160 of spmu298a
         */
        MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_EMAC0);
        MAP_SysCtlPeripheralReset(SYSCTL_PERIPH_EMAC0);

        //Enable internal PHY
        MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_EPHY0);
        MAP_SysCtlPeripheralReset(SYSCTL_PERIPH_EPHY0);

        // Set Ethernet LED pinouts
        // See Page 269 of spmu298a.pdf
        MAP_GPIOPinConfigure(GPIO_PF0_EN0LED0);
        MAP_GPIOPinConfigure(GPIO_PF4_EN0LED1);
        GPIOPinTypeEthernetLED(GPIO_PORTF_BASE, GPIO_PIN_0|GPIO_PIN_4);


        // Busy wait until MAC ready
        while(MAP_SysCtlPeripheralReady(SYSCTL_PERIPH_EMAC0) == 0);

        //Using builtin PHY, so don't need to call GPIOPinTypeEthernetMII()
        MAP_EMACPHYConfigSet(EMAC0_BASE, EMAC_PHY_TYPE_INTERNAL|EMAC_PHY_INT_MDIX_EN|EMAC_PHY_AN_100B_T_FULL_DUPLEX);


        // Initialize MAC (see spmu363a.pdf)
        // Maybe should optimize burst size
        MAP_EMACInit(EMAC0_BASE, g_syshz, EMAC_BCONFIG_MIXED_BURST|EMAC_BCONFIG_PRIORITY_FIXED, 4, 4, 0);

        // Set options
        //  Tune parameters
        MAP_EMACConfigSet(EMAC0_BASE, (EMAC_CONFIG_FULL_DUPLEX |
                    EMAC_CONFIG_CHECKSUM_OFFLOAD |
                    EMAC_CONFIG_7BYTE_PREAMBLE |
                    EMAC_CONFIG_IF_GAP_96BITS |
                    EMAC_CONFIG_USE_MACADDR0 |
                    EMAC_CONFIG_SA_FROM_DESCRIPTOR |
                    EMAC_CONFIG_100MBPS|
                    EMAC_CONFIG_BO_LIMIT_1024),
                (EMAC_MODE_RX_STORE_FORWARD |
                 EMAC_MODE_TX_STORE_FORWARD |
                 EMAC_MODE_TX_THRESHOLD_64_BYTES |
                 EMAC_MODE_RX_THRESHOLD_64_BYTES), 0);

        //Mac Address saved in user0 and user1 by default
        MAP_FlashUserGet(&user0, &user1);
        mac_addr[0] = user0       & 0xFF; 
        mac_addr[1] = user0 >> 8  & 0xFF; 
        mac_addr[2] = user0 >> 16 & 0xFF; 
        mac_addr[3] = user1       & 0xFF; 
        mac_addr[4] = user1 >> 8  & 0xFF; 
        mac_addr[5] = user1 >> 16 & 0xFF; 

        MAP_EMACAddrSet(EMAC0_BASE, 0, mac_addr );

        //Explicitly Disable PTP
        EMACTimestampDisable(EMAC0_BASE); 
    }/*}}}*/

    // Lower priority of ISR so *FromISR functions can be safely called
    MAP_IntPrioritySet(INT_EMAC0, ETH_ISR_PRIO);

    tcpip_init(tcpip_init_cb, NULL);
}/*}}}*/
//*****************************************************************************
//
//! Initializes the lwIP TCP/IP stack.
//!
//! \param ui32SysClkHz is the current system clock rate in Hz.
//! \param pui8MAC is a pointer to a six byte array containing the MAC
//! address to be used for the interface.
//! \param ui32IPAddr is the IP address to be used (static).
//! \param ui32NetMask is the network mask to be used (static).
//! \param ui32GWAddr is the Gateway address to be used (static).
//! \param ui32IPMode is the IP Address Mode.  \b IPADDR_USE_STATIC will force
//! static IP addressing to be used, \b IPADDR_USE_DHCP will force DHCP with
//! fallback to Link Local (Auto IP), while \b IPADDR_USE_AUTOIP will force
//! Link Local only.
//!
//! This function performs initialization of the lwIP TCP/IP stack for the
//! Ethernet MAC, including DHCP and/or AutoIP, as configured.
//!
//! \return None.
//
//*****************************************************************************
void
lwIPInit(uint32_t ui32SysClkHz, const uint8_t *pui8MAC, uint32_t ui32IPAddr,
         uint32_t ui32NetMask, uint32_t ui32GWAddr, uint32_t ui32IPMode)
{
    //
    // Check the parameters.
    //
#if LWIP_DHCP && LWIP_AUTOIP
    ASSERT((ui32IPMode == IPADDR_USE_STATIC) ||
           (ui32IPMode == IPADDR_USE_DHCP) ||
           (ui32IPMode == IPADDR_USE_AUTOIP));
#elif LWIP_DHCP
    ASSERT((ui32IPMode == IPADDR_USE_STATIC) ||
           (ui32IPMode == IPADDR_USE_DHCP));
#elif LWIP_AUTOIP
    ASSERT((ui32IPMode == IPADDR_USE_STATIC) ||
           (ui32IPMode == IPADDR_USE_AUTOIP));
#else
    ASSERT(ui32IPMode == IPADDR_USE_STATIC);
#endif

    //
    // Enable the ethernet peripheral.
    //
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_EMAC0);
    MAP_SysCtlPeripheralReset(SYSCTL_PERIPH_EMAC0);

    //
    // Enable the internal PHY if it's present and we're being
    // asked to use it.
    //
    if((EMAC_PHY_CONFIG & EMAC_PHY_TYPE_MASK) == EMAC_PHY_TYPE_INTERNAL)
    {
        //
        // We've been asked to configure for use with the internal
        // PHY.  Is it present?
        //
        if(MAP_SysCtlPeripheralPresent(SYSCTL_PERIPH_EPHY0))
        {
            //
            // Yes - enable and reset it.
            //
            MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_EPHY0);
            MAP_SysCtlPeripheralReset(SYSCTL_PERIPH_EPHY0);
        }
        else
        {
            //
            // Internal PHY is not present on this part so hang here.
            //
            while(1)
            {
            }
        }
    }

    //
    // Wait for the MAC to come out of reset.
    //
    while(!MAP_SysCtlPeripheralReady(SYSCTL_PERIPH_EMAC0))
    {
    }

    //
    // Configure for use with whichever PHY the user requires.
    //
    MAP_EMACPHYConfigSet(EMAC0_BASE, EMAC_PHY_CONFIG);

    //
    // Initialize the MAC and set the DMA mode.
    //
    MAP_EMACInit(EMAC0_BASE, ui32SysClkHz,
                 EMAC_BCONFIG_MIXED_BURST | EMAC_BCONFIG_PRIORITY_FIXED,
                 4, 4, 0);

    //
    // Set MAC configuration options.
    //
    MAP_EMACConfigSet(EMAC0_BASE, (EMAC_CONFIG_FULL_DUPLEX |
                                   EMAC_CONFIG_CHECKSUM_OFFLOAD |
                                   EMAC_CONFIG_7BYTE_PREAMBLE |
                                   EMAC_CONFIG_IF_GAP_96BITS |
                                   EMAC_CONFIG_USE_MACADDR0 |
                                   EMAC_CONFIG_SA_FROM_DESCRIPTOR |
                                   EMAC_CONFIG_BO_LIMIT_1024),
                      (EMAC_MODE_RX_STORE_FORWARD |
                       EMAC_MODE_TX_STORE_FORWARD |
                       EMAC_MODE_TX_THRESHOLD_64_BYTES |
                       EMAC_MODE_RX_THRESHOLD_64_BYTES), 0);

    //
    // Program the hardware with its MAC address (for filtering).
    //
    MAP_EMACAddrSet(EMAC0_BASE, 0, (uint8_t *)pui8MAC);

    //
    // Save the network configuration for later use by the private
    // initialization.
    //
    g_ui32IPMode = ui32IPMode;
    g_ui32IPAddr = ui32IPAddr;
    g_ui32NetMask = ui32NetMask;
    g_ui32GWAddr = ui32GWAddr;

    //
    // Initialize lwIP.  The remainder of initialization is done immediately if
    // not using a RTOS and it is deferred to the TCP/IP thread's context if
    // using a RTOS.
    //
#if NO_SYS
    lwIPPrivateInit(0);
#else
    tcpip_init(lwIPPrivateInit, 0);
#endif
}