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lwiplib.c
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lwiplib.c
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//*****************************************************************************
//
// lwiplib.c - lwIP TCP/IP Library Abstraction Layer.
//
// Copyright (c) 2008-2013 Texas Instruments Incorporated. All rights reserved.
// Software License Agreement
//
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
//
// This is part of revision 2.0.1.11577 of the Tiva Utility Library.
//
//*****************************************************************************
//*****************************************************************************
//
// Ensure that the lwIP compile time options are included first.
//
//*****************************************************************************
#include <Energia.h>
#include "architecture/lwiplib.h"
//*****************************************************************************
//
// Ensure that ICMP checksum offloading is enabled; otherwise the TM4C129
// driver will not operate correctly.
//
//*****************************************************************************
#ifndef LWIP_OFFLOAD_ICMP_CHKSUM
#define LWIP_OFFLOAD_ICMP_CHKSUM 1
#endif
//*****************************************************************************
//
// The lwIP Library abstration layer provides for a host callback function to
// be called periodically in the lwIP context. This is the timer interval, in
// ms, for this periodic callback. If the timer interval is defined to 0 (the
// default value), then no periodic host callback is performed.
//
//*****************************************************************************
#ifndef HOST_TMR_INTERVAL
#define HOST_TMR_INTERVAL 0
#else
extern void lwIPHostTimerHandler(void);
#endif
//*****************************************************************************
//
// The link detect polling interval.
//
//*****************************************************************************
#define LINK_TMR_INTERVAL 10
//*****************************************************************************
//
// Set the PHY configuration to the default (internal) option if necessary.
//
//*****************************************************************************
#ifndef EMAC_PHY_CONFIG
#define EMAC_PHY_CONFIG (EMAC_PHY_TYPE_INTERNAL | \
EMAC_PHY_INT_MDIX_EN | \
EMAC_PHY_AN_100B_T_FULL_DUPLEX)
#endif
//*****************************************************************************
//
// Driverlib headers needed for this library module.
//
//*****************************************************************************
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_nvic.h"
#include "inc/hw_emac.h"
#include "driverlib/debug.h"
#include "driverlib/emac.h"
#include "driverlib/rom.h"
#include "driverlib/rom_map.h"
#include "driverlib/sysctl.h"
#include "lwip/dhcp.h"
#include "lwip/dns.h"
#include "lwip/autoip.h"
#include "lwip/init.h"
#include "netif/tivaif.h"
#if !NO_SYS
#if RTOS_FREERTOS
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"
#endif
#if ((RTOS_FREERTOS) < 1)
#error No RTOS is defined. Please define an RTOS.
#endif
#if ((RTOS_FREERTOS) > 1)
#error More than one RTOS defined. Please define only one RTOS at a time.
#endif
#endif
//*****************************************************************************
//
// The lwIP network interface structure for the Tiva Ethernet MAC.
//
//*****************************************************************************
static struct netif g_sNetIF;
//*****************************************************************************
//
// The application's interrupt handler for hardware timer events from the MAC.
//
//*****************************************************************************
tHardwareTimerHandler g_pfnTimerHandler;
//*****************************************************************************
//
// The local time for the lwIP Library Abstraction layer, used to support the
// Host and lwIP periodic callback functions.
//
//*****************************************************************************
#if NO_SYS
uint32_t g_ui32LocalTimer = 0;
#endif
//*****************************************************************************
//
// The local time when the TCP timer was last serviced.
//
//*****************************************************************************
#if NO_SYS
static uint32_t g_ui32TCPTimer = 0;
#endif
//*****************************************************************************
//
// The local time when the HOST timer was last serviced.
//
//*****************************************************************************
#if NO_SYS && HOST_TMR_INTERVAL
static uint32_t g_ui32HostTimer = 0;
#endif
//*****************************************************************************
//
// The local time when the ARP timer was last serviced.
//
//*****************************************************************************
#if NO_SYS && LWIP_ARP
static uint32_t g_ui32ARPTimer = 0;
#endif
//*****************************************************************************
//
// The local time when the AutoIP timer was last serviced.
//
//*****************************************************************************
#if NO_SYS && LWIP_AUTOIP
static uint32_t g_ui32AutoIPTimer = 0;
#endif
//*****************************************************************************
//
// The local time when the DHCP Coarse timer was last serviced.
//
//*****************************************************************************
#if NO_SYS && LWIP_DHCP
static uint32_t g_ui32DHCPCoarseTimer = 0;
#endif
//*****************************************************************************
//
// The local time when the DHCP Fine timer was last serviced.
//
//*****************************************************************************
#if NO_SYS && LWIP_DHCP
static uint32_t g_ui32DHCPFineTimer = 0;
#endif
//*****************************************************************************
//
// The local time when the IP Reassembly timer was last serviced.
//
//*****************************************************************************
#if NO_SYS && IP_REASSEMBLY
static uint32_t g_ui32IPReassemblyTimer = 0;
#endif
//*****************************************************************************
//
// The local time when the IGMP timer was last serviced.
//
//*****************************************************************************
#if NO_SYS && LWIP_IGMP
static uint32_t g_ui32IGMPTimer = 0;
#endif
//*****************************************************************************
//
// The local time when the DNS timer was last serviced.
//
//*****************************************************************************
#if NO_SYS && LWIP_DNS
static uint32_t g_ui32DNSTimer = 0;
#endif
//*****************************************************************************
//
// The local time when the link detect timer was last serviced.
//
//*****************************************************************************
#if NO_SYS && (LWIP_AUTOIP || LWIP_DHCP)
static uint32_t g_ui32LinkTimer = 0;
#endif
//*****************************************************************************
//
// The default IP address acquisition mode.
//
//*****************************************************************************
static uint32_t g_ui32IPMode = IPADDR_USE_STATIC;
//*****************************************************************************
//
// The most recently detected link state.
//
//*****************************************************************************
#if LWIP_AUTOIP || LWIP_DHCP
static bool g_bLinkActive = false;
#endif
//*****************************************************************************
//
// The IP address to be used. This is used during the initialization of the
// stack and when the interface configuration is changed.
//
//*****************************************************************************
static uint32_t g_ui32IPAddr;
//*****************************************************************************
//
// The netmask to be used. This is used during the initialization of the stack
// and when the interface configuration is changed.
//
//*****************************************************************************
static uint32_t g_ui32NetMask;
//*****************************************************************************
//
// The gateway address to be used. This is used during the initialization of
// the stack and when the interface configuration is changed.
//
//*****************************************************************************
static uint32_t g_ui32GWAddr;
//*****************************************************************************
//
// The stack size for the interrupt task.
//
//*****************************************************************************
#if !NO_SYS
#define STACKSIZE_LWIPINTTASK 128
#endif
//*****************************************************************************
//
// The handle for the "queue" (semaphore) used to signal the interrupt task
// from the interrupt handler.
//
//*****************************************************************************
#if !NO_SYS
static xQueueHandle g_pInterrupt;
#endif
//*****************************************************************************
//
// This task handles reading packets from the Ethernet controller and supplying
// them to the TCP/IP thread.
//
//*****************************************************************************
#if !NO_SYS
static void
lwIPInterruptTask(void *pvArg)
{
//
// Loop forever.
//
while(1)
{
//
// Wait until the semaphore has been signaled.
//
while(xQueueReceive(g_pInterrupt, &pvArg, portMAX_DELAY) != pdPASS)
{
}
//
// Processes any packets waiting to be sent or received.
//
tivaif_interrupt(&g_sNetIF, (uint32_t)pvArg);
//
// Re-enable the Ethernet interrupts.
//
MAP_EMACIntEnable(EMAC0_BASE, (EMAC_INT_RECEIVE | EMAC_INT_TRANSMIT |
EMAC_INT_TX_STOPPED |
EMAC_INT_RX_NO_BUFFER |
EMAC_INT_RX_STOPPED | EMAC_INT_PHY));
}
}
#endif
//*****************************************************************************
//
// This function performs a periodic check of the link status and responds
// appropriately if it has changed.
//
//*****************************************************************************
#if LWIP_AUTIP || LWIP_DHCP
static void
lwIPLinkDetect(void)
{
bool bHaveLink;
struct ip_addr ip_addr;
struct ip_addr net_mask;
struct ip_addr gw_addr;
//
// See if there is an active link.
//
bHaveLink = MAP_EMACPHYRead(EMAC0_BASE, 0, EPHY_BMSR) & EPHY_BMSR_LINKSTAT;
//
// Return without doing anything else if the link state hasn't changed.
//
if(bHaveLink == g_bLinkActive)
{
return;
}
//
// Save the new link state.
//
g_bLinkActive = bHaveLink;
//
// Setup the network address values.
//
if(g_ui32IPMode == IPADDR_USE_STATIC)
{
ip_addr.addr = htonl(g_ui32IPAddr);
net_mask.addr = htonl(g_ui32NetMask);
gw_addr.addr = htonl(g_ui32GWAddr);
}
else
{
ip_addr.addr = 0;
net_mask.addr = 0;
gw_addr.addr = 0;
}
/*
//
// Clear any address information from the network interface.
//
ip_addr.addr = 0;
net_mask.addr = 0;
gw_addr.addr = 0;
netif_set_addr(&g_sNetIF, &ip_addr, &net_mask, &gw_addr);
*/
//
// See if there is a link now.
//
if(bHaveLink)
{
//
// Start DHCP, if enabled.
//
#if LWIP_DHCP
if(g_ui32IPMode == IPADDR_USE_DHCP)
{
dhcp_start(&g_sNetIF);
}
#endif
//
// Start AutoIP, if enabled and DHCP is not.
//
#if LWIP_AUTOIP
if(g_ui32IPMode == IPADDR_USE_AUTOIP)
{
autoip_start(&g_sNetIF);
}
#endif
}
else
{
//
// Stop DHCP, if enabled.
//
#if LWIP_DHCP
if(g_ui32IPMode == IPADDR_USE_DHCP)
{
dhcp_stop(&g_sNetIF);
}
#endif
//
// Stop AutoIP, if enabled and DHCP is not.
//
#if LWIP_AUTOIP
if(g_ui32IPMode == IPADDR_USE_AUTOIP)
{
autoip_stop(&g_sNetIF);
}
#endif
}
}
#endif
//*****************************************************************************
//
// This function services all of the lwIP periodic timers, including TCP and
// Host timers. This should be called from the lwIP context, which may be
// the Ethernet interrupt (in the case of a non-RTOS system) or the lwIP
// thread, in the event that an RTOS is used.
//
//*****************************************************************************
#if NO_SYS
static void
lwIPServiceTimers(void)
{
//
// Service the host timer.
//
#if HOST_TMR_INTERVAL
if((g_ui32LocalTimer - g_ui32HostTimer) >= HOST_TMR_INTERVAL)
{
g_ui32HostTimer = g_ui32LocalTimer;
//lwIPHostTimerHandler();
}
#endif
//
// Service the ARP timer.
//
#if LWIP_ARP
if((g_ui32LocalTimer - g_ui32ARPTimer) >= ARP_TMR_INTERVAL)
{
g_ui32ARPTimer = g_ui32LocalTimer;
etharp_tmr();
}
#endif
//
// Service the TCP timer.
//
#if LWIP_TCP
if((g_ui32LocalTimer - g_ui32TCPTimer) >= TCP_TMR_INTERVAL)
{
g_ui32TCPTimer = g_ui32LocalTimer;
tcp_tmr();
}
#endif
//
// Service the AutoIP timer.
//
#if LWIP_AUTOIP
if((g_ui32LocalTimer - g_ui32AutoIPTimer) >= AUTOIP_TMR_INTERVAL)
{
g_ui32AutoIPTimer = g_ui32LocalTimer;
autoip_tmr();
}
#endif
//
// Service the DCHP Coarse Timer.
//
#if LWIP_DHCP
if((g_ui32LocalTimer - g_ui32DHCPCoarseTimer) >= DHCP_COARSE_TIMER_MSECS)
{
g_ui32DHCPCoarseTimer = g_ui32LocalTimer;
dhcp_coarse_tmr();
}
#endif
//
// Service the DCHP Fine Timer.
//
#if LWIP_DHCP
if((g_ui32LocalTimer - g_ui32DHCPFineTimer) >= DHCP_FINE_TIMER_MSECS)
{
g_ui32DHCPFineTimer = g_ui32LocalTimer;
dhcp_fine_tmr();
}
#endif
//
// Service the IP Reassembly Timer
//
#if IP_REASSEMBLY
if((g_ui32LocalTimer - g_ui32IPReassemblyTimer) >= IP_TMR_INTERVAL)
{
g_ui32IPReassemblyTimer = g_ui32LocalTimer;
ip_reass_tmr();
}
#endif
//
// Service the IGMP Timer
//
#if LWIP_IGMP
if((g_ui32LocalTimer - g_ui32IGMPTimer) >= IGMP_TMR_INTERVAL)
{
g_ui32IGMPTimer = g_ui32LocalTimer;
igmp_tmr();
}
#endif
//
// Service the DNS Timer
//
#if LWIP_DNS
if((g_ui32LocalTimer - g_ui32DNSTimer) >= DNS_TMR_INTERVAL)
{
g_ui32DNSTimer = g_ui32LocalTimer;
dns_tmr();
}
#endif
//
// Service the link timer.
//
#if LWIP_AUTOIP || LWIP_DHCP
if((g_ui32LocalTimer - g_ui32LinkTimer) >= LINK_TMR_INTERVAL)
{
g_ui32LinkTimer = g_ui32LocalTimer;
lwIPLinkDetect();
}
#endif
}
#endif
//*****************************************************************************
//
// Completes the initialization of lwIP. This is directly called when not
// using a RTOS and provided as a callback to the TCP/IP thread when using a
// RTOS.
//
//*****************************************************************************
static void
lwIPPrivateInit(void *pvArg)
{
struct ip_addr ip_addr;
struct ip_addr net_mask;
struct ip_addr gw_addr;
//
// If not using a RTOS, initialize the lwIP stack.
//
#if NO_SYS
lwip_init();
#endif
//
// If using a RTOS, create a queue (to be used as a semaphore) to signal
// the Ethernet interrupt task from the Ethernet interrupt handler.
//
#if !NO_SYS
#if RTOS_FREERTOS
g_pInterrupt = xQueueCreate(1, sizeof(void *));
#endif
#endif
//
// If using a RTOS, create the Ethernet interrupt task.
//
#if !NO_SYS
#if RTOS_FREERTOS
xTaskCreate(lwIPInterruptTask, (signed portCHAR *)"eth_int",
STACKSIZE_LWIPINTTASK, 0, tskIDLE_PRIORITY + 1,
0);
#endif
#endif
//
// Setup the network address values.
//
if(g_ui32IPMode == IPADDR_USE_STATIC)
{
ip_addr.addr = htonl(g_ui32IPAddr);
net_mask.addr = htonl(g_ui32NetMask);
gw_addr.addr = htonl(g_ui32GWAddr);
}
else
{
ip_addr.addr = 0;
net_mask.addr = 0;
gw_addr.addr = 0;
}
//
// Create, configure and add the Ethernet controller interface with
// default settings. ip_input should be used to send packets directly to
// the stack when not using a RTOS and tcpip_input should be used to send
// packets to the TCP/IP thread's queue when using a RTOS.
//
#if NO_SYS
netif_add(&g_sNetIF, &ip_addr, &net_mask, &gw_addr, NULL, tivaif_init,
ip_input);
#else
netif_add(&g_sNetIF, &ip_addr, &net_mask, &gw_addr, NULL, tivaif_init,
tcpip_input);
#endif
netif_set_default(&g_sNetIF);
//
// Bring the interface up.
//
netif_set_up(&g_sNetIF);
//
// Setup a timeout for the host timer callback function if using a RTOS.
//
#if !NO_SYS && HOST_TMR_INTERVAL
sys_timeout(HOST_TMR_INTERVAL, lwIPPrivateHostTimer, NULL);
#endif
//
// Setup a timeout for the link detect callback function if using a RTOS.
//
#if !NO_SYS && (LWIP_AUTOIP || LWIP_DHCP)
sys_timeout(LINK_TMR_INTERVAL, lwIPPrivateLinkTimer, NULL);
#endif
}
//*****************************************************************************
//
//! 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
}
//*****************************************************************************
//
//! Registers an interrupt callback function to handle the IEEE-1588 timer.
//!
//! \param pfnTimerFunc points to a function which is called whenever the
//! Ethernet MAC reports an interrupt relating to the IEEE-1588 hardware timer.
//!
//! This function allows an application to register a handler for all
//! interrupts generated by the IEEE-1588 hardware timer in the Ethernet MAC.
//! To allow minimal latency timer handling, the callback function provided
//! will be called in interrupt context, regardless of whether or not lwIP is
//! configured to operate with an RTOS. In an RTOS environment, the callback
//! function is responsible for ensuring that all processing it performs is
//! compatible with the low level interrupt context it is called in.
//!
//! The callback function takes two parameters. The first is the base address
//! of the MAC reporting the timer interrupt and the second is the timer
//! interrupt status as reported by EMACTimestampIntStatus(). Note that
//! EMACTimestampIntStatus() causes the timer interrupt sources to be cleared
//! so the application should not call EMACTimestampIntStatus() within the
//! handler.
//!
//! \return None.
//
//*****************************************************************************
void
lwIPTimerCallbackRegister(tHardwareTimerHandler pfnTimerFunc)
{
//
// Remember the callback function address passed.
//
g_pfnTimerHandler = pfnTimerFunc;
}
//*****************************************************************************
//
//! Handles periodic timer events for the lwIP TCP/IP stack.
//!
//! \param ui32TimeMS is the incremental time for this periodic interrupt.
//!
//! This function will update the local timer by the value in \e ui32TimeMS.
//! If the system is configured for use without an RTOS, an Ethernet interrupt
//! will be triggered to allow the lwIP periodic timers to be serviced in the
//! Ethernet interrupt.
//!
//! \return None.
//
//*****************************************************************************
#if NO_SYS
void
lwIPTimer(uint32_t ui32TimeMS)
{
//
// Increment the lwIP Ethernet timer.
//
g_ui32LocalTimer += ui32TimeMS;
//
// Generate an Ethernet interrupt. This will perform the actual work
// of checking the lwIP timers and taking the appropriate actions. This is
// needed since lwIP is not re-entrant, and this allows all lwIP calls to
// be placed inside the Ethernet interrupt handler ensuring that all calls
// into lwIP are coming from the same context, preventing any reentrancy
// issues. Putting all the lwIP calls in the Ethernet interrupt handler
// avoids the use of mutexes to avoid re-entering lwIP.
//
HWREG(NVIC_SW_TRIG) |= INT_EMAC0 - 16;
}
#endif
//*****************************************************************************
//
//! Handles Ethernet interrupts for the lwIP TCP/IP stack.
//!
//! This function handles Ethernet interrupts for the lwIP TCP/IP stack. At
//! the lowest level, all receive packets are placed into a packet queue for
//! processing at a higher level. Also, the transmit packet queue is checked
//! and packets are drained and transmitted through the Ethernet MAC as needed.
//! If the system is configured without an RTOS, additional processing is
//! performed at the interrupt level. The packet queues are processed by the
//! lwIP TCP/IP code, and lwIP periodic timers are serviced (as needed).
//!
//! \return None.
//
//*****************************************************************************
void
lwIPEthernetIntHandler(void)
{
uint32_t ui32Status;
uint32_t ui32TimerStatus;
#if !NO_SYS
portBASE_TYPE xWake;
#endif
//
// Read and Clear the interrupt.
//
ui32Status = MAP_EMACIntStatus(EMAC0_BASE, true);
//
// If the interrupt really came from the Ethernet and not our
// timer, clear it.
//
if(ui32Status)
{
MAP_EMACIntClear(EMAC0_BASE, ui32Status);
}
//
// Check to see whether a hardware timer interrupt has been reported.
//
if(ui32Status & EMAC_INT_TIMESTAMP)
{
//
// Yes - read and clear the timestamp interrupt status.
//
ui32TimerStatus = EMACTimestampIntStatus(EMAC0_BASE);
//
// If a timer interrupt handler has been registered, call it.
//
if(g_pfnTimerHandler)
{
g_pfnTimerHandler(EMAC0_BASE, ui32TimerStatus);
}
}
//
// The handling of the interrupt is different based on the use of a RTOS.
//
#if NO_SYS
//
// No RTOS is being used. If a transmit/receive interrupt was active,
// run the low-level interrupt handler.
//
if(ui32Status)
{
tivaif_interrupt(&g_sNetIF, ui32Status);
}
//
// Service the lwIP timers.
//
lwIPServiceTimers();
#else
//
// A RTOS is being used. Signal the Ethernet interrupt task.
//
xQueueSendFromISR(g_pInterrupt, (void *)&ui32Status, &xWake);
//
// Disable the Ethernet interrupts. Since the interrupts have not been
// handled, they are not asserted. Once they are handled by the Ethernet
// interrupt task, it will re-enable the interrupts.
//
MAP_EMACIntDisable(EMAC0_BASE, (EMAC_INT_RECEIVE | EMAC_INT_TRANSMIT |
EMAC_INT_TX_STOPPED |
EMAC_INT_RX_NO_BUFFER |
EMAC_INT_RX_STOPPED | EMAC_INT_PHY));
//
// Potentially task switch as a result of the above queue write.
//
#if RTOS_FREERTOS
if(xWake == pdTRUE)
{
vPortYieldFromISR();
}
#endif
#endif
}
//*****************************************************************************
//
//! Returns the IP address for this interface.
//!
//! This function will read and return the currently assigned IP address for
//! the Stellaris Ethernet interface.
//!
//! \return Returns the assigned IP address for this interface.
//
//*****************************************************************************
uint32_t
lwIPLocalIPAddrGet(void)
{
return((uint32_t)g_sNetIF.ip_addr.addr);
}
bool lwIPLinkActive(void)
{
return g_bLinkActive;
}
//*****************************************************************************
//
//! Returns the network mask for this interface.
//!
//! This function will read and return the currently assigned network mask for
//! the Stellaris Ethernet interface.
//!
//! \return the assigned network mask for this interface.
//
//*****************************************************************************
uint32_t
lwIPLocalNetMaskGet(void)
{
return((uint32_t)g_sNetIF.netmask.addr);
}
//*****************************************************************************
//
//! Returns the gateway address for this interface.
//!
//! This function will read and return the currently assigned gateway address
//! for the Stellaris Ethernet interface.
//!
//! \return the assigned gateway address for this interface.
//