大家可以看出enet_lwip例子文件结构比较混乱，不知道哪些是我们要用到的源文件，不知道哪些是该工程必须用到的库文件，有些学生可能自己新建一个工程，但是编译时会出现错误，提示找不到包含的头文件，但又不知道这些头文件到哪去找？
/* 头文件包含区 --------------------------------------------------------------*/#include "string.h" // strcmp函数和memset函数#include "inc/lm3s9b96.h"#include "inc/hw_ints.h"#include "inc/hw_memmap.h"#include "inc/hw_nvic.h"#include "inc/hw_types.h"#include "inc/hw_i2c.h"#include "driverlib/i2c.h"#include "driverlib/ethernet.h"#include "driverlib/flash.h"#include "driverlib/gpio.h"#include "driverlib/timer.h"#include "driverlib/interrupt.h"#include "driverlib/sysctl.h"#include "driverlib/systick.h"#include "driverlib/uart.h"#include "driverlib/watchdog.h"#include "utils/locator.h"#include "utils/lwiplib.h"#include "utils/uartstdio.h"#include "utils/ustdlib.h"#include "drivers/set_pinout.h"#include "utils/uartstdio.h"/* 数据类型定义区 ------------------------------------------------------------*/typedef unsigned char BYTE;typedef unsigned short WORD;typedef unsigned long DWORD;typedef enum {FALSE = 0, TRUE = !FALSE} bool;/* Defines for setting up the system clock -----------------------------------*/#define SYSTICKHZ 100#define SYSTICKMS (1000 / SYSTICKHZ)#define SYSTICKUS (1000000 / SYSTICKHZ)#define SYSTICKNS (1000000000 / SYSTICKHZ)/* Position and movement granularity for the status indicator shown while the IP address is being determined--------*/#define STATUS_X 50#define STATUS_Y 100#define MAX_STATUS_X (320 - (2 * STATUS_X))#define ANIM_STEP_SIZE 8/* 9b96主板的PF1宏定义 <调试时看门狗对应的LED> ------------------------------*/#define LED_PERIPH SYSCTL_PERIPH_GPIOF#define LED_PORT GPIO_PORTF_BASE#define LED_PIN GPIO_PIN_1 #define LED_ON 1 << 1#define LED_OFF 0BYTE UDPData[1020] = {0x30}; // 全为0，网络助手时间戳显示有问题？？？struct ip_addr local_addr;struct udp_pcb *UdpPcb;struct pbuf *p_tx; // the pointer of transmit bufferstruct ip_addr IP_Addr_Tmp; // 用于UDP_Receive函数中，临时保存UdpPcb->remote_ip中的IP地址/* External Application references -------------------------------------------*/extern void fs_init(void);extern void fs_tick(unsigned long ulTickMS);//*****************************************************************************//// The error routine that is called if the driver library encounters an error.////*****************************************************************************#ifdef DEBUGvoid__error__(char *pcFilename, unsigned long ulLine){}#endif//*****************************************************************************//// 系统时钟初始化函数////*****************************************************************************void SysClk_Init(void){ // 配置系统主时钟, 使用外部晶振16M. SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ); }//*****************************************************************************//// 以太网初始化函数////*****************************************************************************void ETH_Init(void){ DWORD ulUser0, ulUser1; BYTE pucMACArray[6]; // Set the pinout appropriately for this board. PinoutSet(); // Enable and Reset the Ethernet Controller. SysCtlPeripheralEnable(SYSCTL_PERIPH_ETH); SysCtlPeripheralReset(SYSCTL_PERIPH_ETH); // PA4（以太网A、B网切换）管脚为输出(数字功能默认使能，默认2mA驱动) GPIOPinTypeGPIOOutput(GPIO_PORTA_BASE, GPIO_PIN_4); // Enable Port F for Ethernet LEDs. // LED0 Bit 3 Output // LED1 Bit 2 Output GPIOPinTypeEthernetLED(GPIO_PORTF_BASE, GPIO_PIN_2 | GPIO_PIN_3); // Configure the hardware MAC address for Ethernet Controller filtering of // incoming packets. ulUser0 = 0x00000080; ulUser1 = 0x00ACDE48; // Convert the 24/24 split MAC address from NV ram into a 32/16 split MAC // address needed to program the hardware registers, then program the MAC // address into the Ethernet Controller registers. pucMACArray[0] = ((ulUser0 >> 0) & 0xff); pucMACArray[1] = ((ulUser0 >> 8) & 0xff); pucMACArray[2] = ((ulUser0 >> 16) & 0xff); pucMACArray[3] = ((ulUser1 >> 0) & 0xff); pucMACArray[4] = ((ulUser1 >> 8) & 0xff); pucMACArray[5] = ((ulUser1 >> 16) & 0xff); // Initialze the lwIP library, using STATIC. lwIPInit(pucMACArray, 0xC0A8010A, 0xFFFFFF00, 0, IPADDR_USE_STATIC); //192.168.1.10}/******* 这是一个回调函数，当有UDP数据收到时会被调用********/// addr：笔记本的IP地址（存放向开发板发送数据的PC的IP地址）// port：笔记本的端口号（远端端口号）void UDP_Receive(void *arg, struct udp_pcb *upcb, struct pbuf *p_rx, struct ip_addr *addr, u16_t port){ memset(UDPData, 0, 1020); if (p_rx != NULL) // 如果收到的数据不为空 { memcpy(UDPData, (char *)p_rx->payload, p_rx->len); p_tx->len = p_tx->tot_len = p_rx->len; IP_Addr_Tmp = UdpPcb->remote_ip; UdpPcb->remote_ip = *addr; // 获取笔记本的IP地址（远端IP地址） udp_send(UdpPcb, p_tx); } UdpPcb->remote_ip = IP_Addr_Tmp; pbuf_free(p_rx); // 释放缓冲区数据}// 如果在回调函数中发送数据，不用connect; 在回调函数外发送数据必须要connect，否则接收不到数据void UDP_Test_Init(void){ p_tx = pbuf_alloc(PBUF_RAW, sizeof(UDPData), PBUF_RAM); // 按照指定类型分配一个pbuf结构体 // struct pbuf *p_tx; p_tx->payload = (void *)UDPData; // DI16实际发送数据内存区 local_addr.addr = 0x0A01A8C0; // 本地IP地址：192.168.1.10 UdpPcb = udp_new(); // 创建udp协议控制块 udp_bind(UdpPcb, &local_addr, 1025); // 在协议控制块中绑定本地ip地址和本地端口号，本地：开发板（程序下到开发板中） udp_connect(UdpPcb, IP_ADDR_ANY, 1025); // 与远端udp主机建立连接，远端：笔记本 udp_recv(UdpPcb, UDP_Receive, NULL); // 设置数据接收时的回调函数}//*****************************************************************************//// 主函数////*****************************************************************************int main(void){ // 系统时钟初始化，16MHz SysClk_Init(); // 以太网初始化 ETH_Init(); UDP_Test_Init(); // Enable processor interrupts. IntMasterEnable(); while (1) { }}//*****************************************************************************//// The interrupt handler for the SysTick interrupt.////*****************************************************************************void SysTickIntHandler(void){ // Call the lwIP timer handler. lwIPTimer(SYSTICKMS);}//*****************************************************************************//// Required by lwIP library to support any host-related timer functions.////*****************************************************************************void lwIPHostTimerHandler(void){}
按照前面讲的中断映射表的配置，将startup_ewarm.c文件中添加两处代码。编译、运行即可。
我的土豆视频：LM3S9B96的以太网ethernet配置
有什么错误，请大家批评指正
