How is "tiva-tm4c129.c' used in Tiva-C TivaWare?

[Robert Willy]

Hi,

I have a Tiva-C 1294 LaunchPad. Now I am familiarizing the lwIP project. It is found that the Ethernet relevant initial functions are included in file:

"<TivaWare_Directory>/third_party/lwip-1.4.1/ports/tiva-tm4c129/netif/tiva-tm4c129.c"



But I don't find where and how this file is used in lwIP after looking through the example project: 'enet_lwip'

Could you give me some help on this?



Thanks,

[Robert Willy]

I would like to add these info to the question. There is a library file at:

C:\ti\TivaWare_C_Series-2.1.1.71\driverlib\ccs\Debug\driverlib.lib

There are some driver .c and .h files. emac looks like relevant. They are at:

C:\ti\TivaWare_C_Series-2.1.1.71\driverlib\emac.c
C:\ti\TivaWare_C_Series-2.1.1.71\driverlib\emac.h


I also want to post the beginning part of the tiva-tm4c129.c. Hopefully you experienced engineers can find something from it.

Thanks,


/**
* @file - tivaif.c
* lwIP Ethernet interface for Stellaris LM4F Devices
*
*/

/**
* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICui32AR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <ad...@sics.se>
*
*/

/**
* Copyright (c) 2008-2012 Texas Instruments Incorporated
*
* This file is derived from the ``ethernetif.c'' skeleton Ethernet network
* interface driver for lwIP.
*
*/

#include "lwip/opt.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include "lwip/pbuf.h"
#include "lwip/sys.h"
#include <lwip/stats.h>
#include <lwip/snmp.h>
#include "lwip/tcpip.h"
#include "netif/etharp.h"
#include "netif/ppp_oe.h"
#include "netif/tivaif.h"

/**
* Sanity Check: This interface driver will NOT work if the following defines
* are incorrect.
*
*/
#if (PBUF_LINK_HLEN != 16)
#error "PBUF_LINK_HLEN must be 16 for this interface driver!"
#endif
#if (ETH_PAD_SIZE != 0)
#error "ETH_PAD_SIZE must be 0 for this interface driver!"
#endif
#if (!SYS_LIGHTWEIGHT_PROT)
#error "SYS_LIGHTWEIGHT_PROT must be enabled for this interface driver!"
#endif

/**
* Set the physical address of the PHY we will be using if this is not
* specified in lwipopts.h. We assume 0 for the internal PHY.
*/
#ifndef PHY_PHYS_ADDR
#define PHY_PHYS_ADDR 0
#endif

#if 0
#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
#endif

/**
* If necessary, set the defaui32t number of transmit and receive DMA descriptors
* used by the Ethernet MAC.
*
*/
#ifndef NUM_RX_DESCRIPTORS
#define NUM_RX_DESCRIPTORS 4
#endif

#ifndef NUM_TX_DESCRIPTORS
#define NUM_TX_DESCRIPTORS 8
#endif

/**
* Setup processing for PTP (IEEE-1588).
*
*/
#if LWIP_PTPD
extern uint32_t g_ui32SysClk;
extern uint32_t g_ui32PTPTickRate;
extern void lwIPHostGetTime(u32_t *time_s, u32_t *time_ns);
#endif

/**
* Stellaris DriverLib Header Files required for this interface driver.
*
*/
#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_emac.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/emac.h"
#include "driverlib/interrupt.h"
#include "driverlib/sysctl.h"

/* Define those to better describe your network interface. */
#define IFNAME0 't'
#define IFNAME1 'i'
.....