W5500网卡驱动代码,C代码库,德仔网

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【C】 W5500网卡驱动
作者:Alex / 发布于2015/6/25/ 1302
C51程序，基于SPI操作W5500，若要移植到ARM，只需要把模拟SPI那块改下就可以了。

	#include "webserver.h"
	#include "w5500.h"
	
	void main(void)
	{
	 IT0 = 1; //负跳变中断触发
	 EX0 = 1; //打开外部中断
	 EA = 1; //打开终中断
	 w5500_hardware_reset(); //W5500硬复位，通过引脚RST电平触发
	 w5500_init(); //w5500初始化
	 socket_init(SOCKET0, 80); //初始化SOCKET
	 socket_listen(SOCKET0); //监听
	 while(1) {
	 if(W5500_IRQMARK_ISSET()) //检测中断标志
	 w5500_irq_process(); //IRQ处理过程
	 }
	}
	
	//中断处理，使用1寄存器组压栈
	void INT0_irq(void) interrupt 0 using 1
	{
	 //通过设置一个变量来触发w5500_irq_process函数
	 //中断处理时间不能太长，不然很影响性能，
	 //所以用标志变量触发Main函数的中断处理函数
	 //w5500.h
	 EA = 0;
	 W5500_SET_IRQMARK();
	 EA = 1;
	}

	

	

	

	#ifndef _W5500_H_
	#define _W5500_H_
	
	#include <reg52.h>
	
	/***************** Common Register *****************/
	#define MR 0x0000
	 #define RST 0x80
	 #define WOL 0x20
	 #define PB 0x10
	 #define PPP 0x08
	 #define FARP 0x02
	
	#define GAR 0x0001
	#define SUBR 0x0005
	#define SHAR 0x0009
	#define SIPR 0x000f
	
	#define INTLEVEL 0x0013
	#define IR 0x0015
	 #define CONFLICT 0x80
	 #define UNREACH 0x40
	 #define PPPOE 0x20
	 #define MP 0x10
	
	#define IMR 0x0016
	 #define IM_IR7 0x80
	 #define IM_IR6 0x40
	 #define IM_IR5 0x20
	 #define IM_IR4 0x10
	
	#define SIR 0x0017
	 #define S7_INT 0x80
	 #define S6_INT 0x40
	 #define S5_INT 0x20
	 #define S4_INT 0x10
	 #define S3_INT 0x08
	 #define S2_INT 0x04
	 #define S1_INT 0x02
	 #define S0_INT 0x01
	
	#define SIMR 0x0018
	 #define S7_IMR 0x80
	 #define S6_IMR 0x40
	 #define S5_IMR 0x20
	 #define S4_IMR 0x10
	 #define S3_IMR 0x08
	 #define S2_IMR 0x04
	 #define S1_IMR 0x02
	 #define S0_IMR 0x01
	
	#define RTR 0x0019
	#define RCR 0x001b
	
	#define PTIMER 0x001c
	#define PMAGIC 0x001d
	#define PHA 0x001e
	#define PSID 0x0024
	#define PMRU 0x0026
	
	#define UIPR 0x0028
	#define UPORT 0x002c
	
	#define PHYCFGR 0x002e
	 #define RST_PHY 0x80
	 #define OPMODE 0x40
	 #define DPX 0x04
	 #define SPD 0x02
	 #define LINK 0x01
	
	#define VERR 0x0039
	
	/********************* Socket Register *******************/
	#define Sn_MR 0x0000
	 #define MULTI_MFEN 0x80
	 #define BCASTB 0x40
	 #define ND_MC_MMB 0x20
	 #define UCASTB_MIP6B 0x10
	 #define MR_CLOSE 0x00
	 #define MR_TCP 0x01
	 #define MR_UDP 0x02
	 #define MR_MACRAW 0x04
	
	#define Sn_CR 0x0001
	 #define OPEN 0x01
	 #define LISTEN 0x02
	 #define CONNECT 0x04
	 #define DISCON 0x08
	 #define CLOSE 0x10
	 #define SEND 0x20
	 #define SEND_MAC 0x21
	 #define SEND_KEEP 0x22
	 #define RECV 0x40
	
	#define Sn_IR 0x0002
	 #define IR_SEND_OK 0x10
	 #define IR_TIMEOUT 0x08
	 #define IR_RECV 0x04
	 #define IR_DISCON 0x02
	 #define IR_CON 0x01
	
	#define Sn_SR 0x0003
	 #define SOCK_CLOSED 0x00
	 #define SOCK_INIT 0x13
	 #define SOCK_LISTEN 0x14
	 #define SOCK_ESTABLISHED 0x17
	 #define SOCK_CLOSE_WAIT 0x1c
	 #define SOCK_UDP 0x22
	 #define SOCK_MACRAW 0x02
	
	 #define SOCK_SYNSEND 0x15
	 #define SOCK_SYNRECV 0x16
	 #define SOCK_FIN_WAI 0x18
	 #define SOCK_CLOSING 0x1a
	 #define SOCK_TIME_WAIT 0x1b
	 #define SOCK_LAST_ACK 0x1d
	
	#define Sn_PORT 0x0004
	#define Sn_DHAR 0x0006
	#define Sn_DIPR 0x000c
	#define Sn_DPORTR 0x0010
	
	#define Sn_MSSR 0x0012
	#define Sn_TOS 0x0015
	#define Sn_TTL 0x0016
	
	#define Sn_RXBUF_SIZE 0x001e
	#define Sn_TXBUF_SIZE 0x001f
	#define Sn_TX_FSR 0x0020
	#define Sn_TX_RD 0x0022
	#define Sn_TX_WR 0x0024
	#define Sn_RX_RSR 0x0026
	#define Sn_RX_RD 0x0028
	#define Sn_RX_WR 0x002a
	
	#define Sn_IMR 0x002c
	 #define IMR_SENDOK 0x10
	 #define IMR_TIMEOUT 0x08
	 #define IMR_RECV 0x04
	 #define IMR_DISCON 0x02
	 #define IMR_CON 0x01
	
	#define Sn_FRAG 0x002d
	#define Sn_KPALVTR 0x002f
	
	/*******************************************************************/
	/************************ SPI Control Byte *************************/
	/*******************************************************************/
	/* Operation mode bits */
	#define VDM 0x00
	#define FDM1 0x01
	#define FDM2 0x02
	#define FDM4 0x03
	
	/* Read_Write control bit */
	#define RWB_READ 0x00
	#define RWB_WRITE 0x04
	
	/* Block select bits */
	#define COMMON_R 0x00
	
	/* Socket 0 */
	#define S0_REG 0x08
	#define S0_TX_BUF 0x10
	#define S0_RX_BUF 0x18
	
	/* Socket 1 */
	#define S1_REG 0x28
	#define S1_TX_BUF 0x30
	#define S1_RX_BUF 0x38
	
	/* Socket 2 */
	#define S2_REG 0x48
	#define S2_TX_BUF 0x50
	#define S2_RX_BUF 0x58
	
	/* Socket 3 */
	#define S3_REG 0x68
	#define S3_TX_BUF 0x70
	#define S3_RX_BUF 0x78
	
	/* Socket 4 */
	#define S4_REG 0x88
	#define S4_TX_BUF 0x90
	#define S4_RX_BUF 0x98
	
	/* Socket 5 */
	#define S5_REG 0xa8
	#define S5_TX_BUF 0xb0
	#define S5_RX_BUF 0xb8
	
	/* Socket 6 */
	#define S6_REG 0xc8
	#define S6_TX_BUF 0xd0
	#define S6_RX_BUF 0xd8
	
	/* Socket 7 */
	#define S7_REG 0xe8
	#define S7_TX_BUF 0xf0
	#define S7_RX_BUF 0xf8
	
	#define TRUE 0xff
	#define FALSE 0x00
	
	#define S_RX_SIZE 2048
	#define S_TX_SIZE 2048
	
	sbit W5500_RST = P3^3;
	sbit W5500_INT = P3^2;
	sbit W5500_SCS = P3^6;
	sbit W5500_SCLK = P3^7;
	sbit W5500_MISO = P3^4;
	sbit W5500_MOSI = P3^5;
	
	#define PHYADDR0 0x02
	#define PHYADDR1 0x00
	#define PHYADDR2 0x01
	#define PHYADDR3 0x05
	#define PHYADDR4 0x06
	#define PHYADDR5 0x0e
	
	#define IPADDR0 192
	#define IPADDR1 168
	#define IPADDR2 1
	#define IPADDR3 40
	
	#define NETMASK0 255
	#define NETMASK1 255
	#define NETMASK2 255
	#define NETMASK3 0
	
	#define DRIPADDR0 192
	#define DRIPADDR1 168
	#define DRIPADDR2 1
	#define DRIPADDR3 1
	
	#define SOCKET unsigned char
	#define SOCKET0 0
	#define SOCKET1 1
	#define SOCKET2 2
	#define SOCKET3 3
	#define SOCKET4 4
	#define SOCKET5 5
	#define SOCKET6 6
	#define SOCKET7 7
	
	#include "webserver.h"
	#define W5500_IRQ_CALLBACK web_appcall
	
	#define W5500_SOCKET_DISCONN 0x01
	#define W5500_SOCKET_CONN 0x02
	#define W5500_SOCKET_SNDOK 0x04
	#define W5500_SOCKET_RECVOK 0x08
	#define W5500_SOCKET_TIMEOUT 0x10
	#define W5500_IRQ_MARK 0x80
	#define w5500_connect() (w5500_flags & W5500_SOCKET_CONN)
	#define w5500_disconnect() (w5500_flags & W5500_SOCKET_DISCONN)
	#define w5500_sendok() (w5500_flags & W5500_SOCKET_SNDOK)
	#define w5500_recvok() (w5500_flags & W5500_SOCKET_RECVOK)
	#define w5500_timeout() (w5500_flags & W5500_SOCKET_TIMEOUT)
	#define W5500_IRQMARK_ISSET() (w5500_flags & W5500_IRQ_MARK)
	#define W5500_SET_IRQMARK() do { w5500_flags |= W5500_IRQ_MARK; } while(0)
	#define W5500_RESET_IRQMARK() do { w5500_flags &= ~W5500_IRQ_MARK; } while(0)
	extern unsigned char w5500_flags;
	
	extern void w5500_hardware_reset(void);
	extern void w5500_init(void);
	extern void socket_init(SOCKET s, unsigned int port);
	extern unsigned char socket_listen(SOCKET s);
	extern void socket_close(SOCKET s);
	extern unsigned int socket_recv(SOCKET s, unsigned char *pbuf, unsigned int mxsize);
	extern void socket_send(SOCKET s, unsigned char *pbuf, unsigned int buf_size);
	extern void w5500_irq_process(void);
	
	#endif

	

	/*
	 w5500驱动模块
	 作者邮箱： huangchaomeng@qq.com
	 2015年6月1日
	*/
	#include <intrins.h>
	#include "w5500.h"
	
	/*
	空读一次SPI。SPI读写前初始化"脉冲"，因为有时候相隔一段时间后
	第一个读取或者写入的字节会失败，所以先读写0一次。
	*/
	#define W5500_NOP() do { W5500_MISO = 0; \
	 W5500_MOSI = 0; \
	 w5500_read_byte(0x00); \
	 } while(0)
	
	//网卡物理地址
	static unsigned char ethmac[6] = { PHYADDR0,
	 PHYADDR1, PHYADDR2, PHYADDR3, PHYADDR4, PHYADDR5 };
	//网卡IP地址
	static unsigned char ipaddr[4] = { IPADDR0, IPADDR1,
	 IPADDR2, IPADDR3 };
	//网卡子网掩码
	static unsigned char netmask[4] = { NETMASK0, NETMASK1,
	 NETMASK2, NETMASK3 };
	//网卡网关地址
	static unsigned char dripaddr[4] = { DRIPADDR0, DRIPADDR1, DRIPADDR2,
	 DRIPADDR3 };
	unsigned char w5500_flags; //中断标志
	
	//延迟 ms
	static void delay(unsigned int x)
	{
	 unsigned int i,j;
	
	 for(j=0;j<5;j++)
	 for(i=0;i<x;i++);
	}
	
	//SPI读写时序，这里是模式0，具体可以参考SPI模式0时序图
	static unsigned char spi_process(unsigned char dat)
	{
	 unsigned char i, ret = 0;
	
	 for(i = 0; i < 8; i++) {
	 //判断最高位是否为0
	 if(dat & 0x80)
	 W5500_MOSI = 1; //给高电平
	 else
	 W5500_MOSI = 0; //给低电平
	 dat <<= 1;
	 W5500_SCLK = 1; //SCK上升沿写入
	 ret <<= 1;
	 ret |= W5500_MISO; //上升沿写入的同时读取
	 W5500_SCLK = 0; //恢复默认电平
	 }
	 return ret;
	}
	
	//SPI写入一个字节
	static void spi_write(unsigned char dat)
	{
	 spi_process(dat);
	}
	
	//SPI读取一个字节
	static unsigned char spi_read(void)
	{
	 return spi_process(0x00);
	}
	
	//SPI写入2个字节
	static void spi_write_short(unsigned int dat)
	{
	 spi_write((unsigned char)(dat >> 8)); //先写入高8位字节
	 spi_write((unsigned char)(dat & 0x00ff));
	}
	
	//向W5500通用寄存器写入1字节数据，参数1：寄存器地址，参数二：数据
	static void w5500_write_byte(unsigned int reg, unsigned char dat)
	{
	 W5500_SCS = 0; //置W5500的SCS为低电平
	 spi_write_short(reg); //通过SPI写16位寄存器地址
	 spi_write(FDM1|RWB_WRITE|COMMON_R); //通过SPI写控制字节,1个字节数据长度,写数据,选择通用寄存器
	 spi_write(dat); //写1个字节数据
	 W5500_SCS = 1; //置W5500的SCS为高电平
	}
	
	//向W5500通用寄存器写入2个字节数据，参数1：寄存器地址，参数二：数据
	static void w5500_write_short(unsigned int reg, unsigned int dat)
	{
	 W5500_SCS = 0;
	 spi_write_short(reg); //通过SPI写16位寄存器地址
	 spi_write(FDM2|RWB_WRITE|COMMON_R); //通过SPI写控制字节,2个字节数据长度,写数据,选择通用寄存器
	 spi_write_short(dat); //写16位数据
	 W5500_SCS = 1;
	}
	
	//向W5500通用寄存器写入X个字节数据，参数1：寄存器地址，参数二：数据指针，参数三：数据大小
	static void w5500_write_xbit(unsigned int reg, unsigned char *pdat,
	 unsigned int size)
	{
	 unsigned int i;
	 W5500_SCS = 0;
	 spi_write_short(reg);
	 spi_write(VDM|RWB_WRITE|COMMON_R); //写入可X字节，写入字节数由CS控制，FDM1写入1字节，FDM2二字节，VDM可变字节
	 for(i = 0; i < size; i++) {
	 spi_write(*pdat);
	 ++pdat;
	 }
	 W5500_SCS = 1;
	}
	
	//向W5500的SOCKET寄存器写入一个字节数据，参数1：SOCKET，参数二：寄存器地址，参数三：数据
	static void w5500_wirte_sock_byte(SOCKET s, unsigned int reg,
	 unsigned char dat)
	{
	 W5500_SCS = 0;
	 spi_write_short(reg); //通过SPI写16位寄存器地址
	 spi_write(FDM1|RWB_WRITE|(s*0x20+0x08)); //通过SPI写控制字节,1个字节数据长度,写数据,选择端口s的寄存器
	 spi_write(dat); //写1个字节数据
	 W5500_SCS = 1;
	}
	
	//向W5500的SOCKET寄存器写入2个字节数据，参数1：SOCKET，参数二：寄存器地址，参数三：数据
	static void w5500_wirte_sock_short(SOCKET s, unsigned int reg,
	 unsigned int dat)
	{
	 W5500_SCS = 0;
	 spi_write_short(reg);
	 spi_write(FDM2|RWB_WRITE|(s*0x20+0x08));
	 spi_write_short(dat);
	 W5500_SCS = 1;
	}
	
	//向W5500的通用寄存器读取一个字节数据，参数1：寄存器地址
	static unsigned char w5500_read_byte(unsigned int reg)
	{
	 unsigned char ret;
	 W5500_SCS = 0;
	 spi_write_short(reg);
	 spi_write(FDM1|RWB_READ|COMMON_R);
	 ret = spi_read();
	 W5500_SCS = 1;
	 return ret;
	}
	
	//向W5500的SOCKET寄存器读取一个字节数据，参数1：SOCKET，参数二：寄存器地址
	static unsigned char w5500_read_sock_byte(SOCKET s, unsigned int reg)
	{
	 unsigned char ret;
	 W5500_SCS = 0;
	 spi_write_short(reg);
	 spi_write(FDM1|RWB_READ|(s*0x20+0x08));
	 ret = spi_read();
	 W5500_SCS = 1;
	 return ret;
	}
	
	//向W5500的SOCKET寄存器读取两个字节的数据，参数1：SOCKET，参数二：寄存器地址
	static unsigned int w5500_read_sock_short(SOCKET s,
	 unsigned int reg)
	{
	 unsigned int ret;
	 W5500_SCS = 0;
	 spi_write_short(reg);
	 spi_write(FDM2|RWB_READ|(s*0x20+0x08));
	 ret = spi_read();
	 ret <<= 8;
	 ret |= spi_read();
	 W5500_SCS = 1;
	 return ret;
	}
	
	//向W5500的SOCKET数据缓冲器读取接收到的数据包，参数1：SOCKET，参数二，数据缓冲区，参数三：
	//缓冲区最大大小
	static unsigned int w5500_read_sock_buffer(SOCKET s,
	 unsigned char *pbuf, unsigned int mxsize)
	{
	 unsigned int rx_size;
	 unsigned int offset, offset1;
	 unsigned int i;
	 unsigned char j;
	 unsigned int count;
	
	 W5500_NOP();
	 rx_size = w5500_read_sock_short(s, Sn_RX_RSR);
	 if(rx_size == 0)
	 return 0; //没接收到数据则返回
	 if(rx_size > 1460)
	 rx_size = 1460;
	 W5500_NOP();
	 offset = w5500_read_sock_short(s, Sn_RX_RD);
	 offset1 = offset;
	 offset &= (S_RX_SIZE-1); //计算实际的物理地址
	 W5500_SCS = 0; //置W5500的SCS为低电平
	 count = 0;
	 spi_write_short(offset); //写16位地址
	 spi_write(VDM|RWB_READ|(s*0x20+0x18)); //写控制字节,N个字节数据长度,读数据,选择端口s的寄存器
	 //如果最大地址未超过W5500接收缓冲区寄存器的最大地址
	 if((offset+rx_size) < S_RX_SIZE) {
	 //循环读取rx_size个字节数据
	 for(i = 0; i < rx_size; i++) {
	 j = spi_read();
	 //超过mxsize的数据将被遗弃
	 if(++count <= mxsize) {
	 *pbuf = j; //将读取到的数据保存到数据保存缓冲区
	 ++pbuf; //数据保存缓冲区指针地址自增1
	 }
	 }
	 } else {
	 offset = S_RX_SIZE - offset;
	 //循环读取出前offset个字节数据
	 for(i = 0; i < offset; i++) {
	 j = spi_read();
	 if(++count <= mxsize) {
	 *pbuf = j;
	 ++pbuf;
	 }
	 }
	 W5500_SCS = 1;
	 W5500_SCS = 0;
	 spi_write_short(0x00); //写16位地址
	 spi_write(VDM|RWB_READ|(s*0x20+0x18));
	 //循环读取后rx_size-offset个字节数据
	 for(; i < rx_size; i++) {
	 j = spi_read();
	 if(++count <= mxsize) {
	 *pbuf = j;
	 ++pbuf;
	 }
	 }
	 }
	 offset1 += rx_size; //更新实际物理地址,即下次读取接收到的数据的起始地址
	 w5500_wirte_sock_short(s, Sn_RX_RD, offset1);
	 w5500_wirte_sock_byte(s, Sn_CR, RECV); //发送启动接收命令
	 W5500_SCS = 1;
	 return count < mxsize ? rx_size : mxsize;
	}
	
	//向W5500的SOCKET数据缓冲器写入数据，参数1：SOCKET，参数二，数据缓冲区，参数三：
	//数据大小
	static void w5500_write_sock_buffer(SOCKET s,
	 unsigned char *pbuf, unsigned int size)
	{
	 unsigned int offset,offset1;
	 unsigned int i;
	
	 W5500_NOP();
	 offset = w5500_read_sock_short(s, Sn_TX_WR);
	 offset1 = offset;
	 offset &= (S_TX_SIZE-1); //计算实际的物理地址
	
	 W5500_SCS = 0;
	 spi_write_short(offset);
	 spi_write(VDM|RWB_WRITE|(s*0x20+0x10));
	 //如果最大地址未超过W5500发送缓冲区寄存器的最大地址
	 if((offset+size) < S_TX_SIZE) {
	 for(i = 0; i < size; i++) {
	 spi_write(*pbuf);
	 ++pbuf;
	 }
	 } else {
	 offset = S_TX_SIZE - offset;
	 for(i = 0; i < offset; i++) {
	 spi_write(*pbuf);
	 ++pbuf;
	 }
	 W5500_SCS = 1;
	 W5500_SCS = 0;
	 spi_write_short(0x00);
	 spi_write(VDM|RWB_WRITE|(s*0x20+0x10));
	 for(; i < size; i++) {
	 spi_write(*pbuf);
	 ++pbuf;
	 }
	
	 }
	 W5500_SCS = 1;
	 offset1 += size;
	 //更新实际物理地址,即下次写待发送数据到发送数据缓冲区的起始地址
	 w5500_wirte_sock_short(s, Sn_TX_WR, offset1);
	 w5500_wirte_sock_byte(s, Sn_CR, SEND); //发送启动发送命令
	}
	
	//W5500硬重启
	void w5500_hardware_reset(void)
	{
	 unsigned char k;
	 W5500_RST = 0; //拉低RST引脚电平，硬复位
	 delay(100); //低电平持续时间
	 W5500_RST = 1; //拉高RST引脚，恢复工作状态
	 delay(100);
	 //引脚初始化
	 W5500_SCLK = 0;
	 W5500_SCS = 1;
	 W5500_MOSI = 0;
	 W5500_MISO = 0;
	 //检测PHYCFGR寄存器的第一位值，检测是否连接上网络设备
	 while(1) {
	 k = w5500_read_byte(PHYCFGR);
	 if((k & LINK) != 0)
	 break; //连接上，就退出
	 }
	}
	
	//W5500初始化
	void w5500_init(void)
	{
	 unsigned char i = 0;
	
	 w5500_flags = 0;
	 w5500_write_byte(MR, RST); //发送软复位命令
	 delay(100); //给内部寄存器初始化时间
	 w5500_write_xbit(GAR, dripaddr, 4); //设置网关地址
	 w5500_write_xbit(SUBR, netmask, 4); //设置子网掩码
	 w5500_write_xbit(SHAR, ethmac, 6); //设置MAC地址
	 w5500_write_xbit(SIPR, ipaddr, 4); //设置设置IP地址
	 //32KB缓存，每个SOCKET给4K，分别给每个SOCKET的接收和发送缓冲区，具体参考
	 //w5500手册
	 for(i = 0; i < 8; i++) {
	 w5500_wirte_sock_byte(i, Sn_RXBUF_SIZE, 0x02);
	 w5500_wirte_sock_byte(i, Sn_TXBUF_SIZE, 0x02);
	 }
	 //设置重试时间，默认为2000(200ms)
	 //每一单位数值为100微秒,初始化时值设为2000(0x07D0),等于200毫秒
	 w5500_write_short(RTR, 0x0fa0);
	 //设置重试次数，默认为8次
	 //如果重发的次数超过设定值,则产生超时中断(相关的端口中断寄存器中的Sn_IR 超时位(TIMEOUT)置&ldquo;1&rdquo;)
	 w5500_write_byte(RCR, 10);
	 w5500_write_byte(SIMR, S0_IMR); //开启W5500的SOCKET0中断
	}
	
	void socket_init(SOCKET s, unsigned int port)
	{
	 switch(s) {
	 case SOCKET0:
	 W5500_NOP();
	 w5500_wirte_sock_short(SOCKET0, Sn_MSSR, 1400); //设置MTU分片
	 w5500_wirte_sock_short(SOCKET0, Sn_PORT,
	 port); //打开socket0的端口
	 w5500_wirte_sock_byte(SOCKET0, Sn_TTL, 64); //IP数据包生存时间
	 break;
	 case SOCKET1:
	 break;
	 case SOCKET2:
	 break;
	 case SOCKET3:
	 break;
	 case SOCKET4:
	 break;
	 case SOCKET5:
	 break;
	 case SOCKET6:
	 break;
	 case SOCKET7:
	 break;
	 }
	}
	
	unsigned char socket_listen(SOCKET s)
	{
	 unsigned char ret;
	
	 W5500_NOP();
	 w5500_wirte_sock_byte(s, Sn_MR, MR_TCP); //设置socket为TCP模式
	 w5500_wirte_sock_byte(s, Sn_CR, OPEN); //打开Socket
	 ret = w5500_read_sock_byte(s, Sn_SR);
	 if(ret != SOCK_INIT) {
	 w5500_wirte_sock_byte(s, Sn_CR, CLOSE); //打开不成功,关闭Socket
	 return 0;
	 }
	 w5500_wirte_sock_byte(s, Sn_CR, LISTEN); //设置Socket为侦听模式
	 ret = w5500_read_sock_byte(s, Sn_SR);
	 if(ret != SOCK_LISTEN) {
	 w5500_wirte_sock_byte(s, Sn_CR, CLOSE);
	 return 0;
	 }
	 return 1;
	 //至此完成了Socket的打开和设置侦听工作,至于远程客户端是否与它建立连接,则需要等待Socket中断，
	 //以判断Socket的连接是否成功。参考W5500数据手册的Socket中断状态
	 //在服务器侦听模式不需要设置目的IP和目的端口号
	}
	
	//关闭SOCKET
	void socket_close(SOCKET s)
	{
	 W5500_NOP();
	 w5500_wirte_sock_byte(s, Sn_CR, CLOSE); //发送关闭命令
	}
	
	//接收数据
	unsigned int socket_recv(SOCKET s, unsigned char *pbuf, unsigned int mxsize)
	{
	 return w5500_read_sock_buffer(s, pbuf, mxsize);
	}
	
	//发送数据
	void socket_send(SOCKET s, unsigned char *pbuf, unsigned int buf_size)
	{
	 w5500_write_sock_buffer(s, pbuf, buf_size);
	}
	
	//中断处理
	void w5500_irq_process(void)
	{
	 unsigned char i,j;
	
	W5500INT:
	 W5500_NOP();
	 i = w5500_read_byte(SIR); //读取中断标志
	 //SOCKET0中断
	 if(i & S0_INT) {
	 j = w5500_read_sock_byte(SOCKET0, Sn_IR);
	 w5500_wirte_sock_byte(SOCKET0, Sn_IR, j); //回写中断标志，复位INT引脚
	 w5500_flags &= W5500_IRQ_MARK; //清除标志位
	 //连接成功
	 if(j & IR_CON) {
	 w5500_flags |= W5500_SOCKET_CONN;
	 }
	 //断开连接
	 if(j & IR_DISCON) {
	 w5500_flags |= W5500_SOCKET_DISCONN;
	 }
	 //发送成功
	 if(j & IR_SEND_OK) {
	 w5500_flags |= W5500_SOCKET_SNDOK;
	 }
	 //接收成功
	 if(j & IR_RECV) {
	 w5500_flags |= W5500_SOCKET_RECVOK;
	 }
	 //超时
	 if(j & IR_TIMEOUT) {
	 w5500_flags |= W5500_SOCKET_TIMEOUT;
	 }
	 W5500_IRQ_CALLBACK(); //回调函数
	 }
	 //SOCKET1中断
	 if(i & S1_INT) {
	
	 }
	 //SOCKET2中断
	 if(i & S2_INT) {
	
	 }
	 //SOCKET3中断
	 if(i & S3_INT) {
	
	 }
	 //SOCKET4中断
	 if(i & S4_INT) {
	
	 }
	 //SOCKET5中断
	 if(i & S5_INT) {
	
	 }
	 //SOCKET6中断
	 if(i & S6_INT) {
	
	 }
	 //SOCKET7中断
	 if(i & S7_INT) {
	
	 }
	
	 W5500_NOP();
	 i = w5500_read_byte(SIR); //检测是否又有中断触发
	 if(i != 0)
	 goto W5500INT;
	 W5500_RESET_IRQMARK();
	}

	#ifndef _WEBSERVER_H_
	#define _WEBSERVER_H_
	
	extern void web_appcall(void);
	
	#endif

	

	#include "webserver.h"
	#include "w5500.h"
	#include <intrins.h>
	
	#define ISO_G 0x47 //"G" ascii码
	#define ISO_E 0x45 //"E" ascii码
	#define ISO_T 0x54 //"T" ascii码
	
	//HTTP报文
	static const unsigned char code webdata[] = {
	"HTTP 1.0 200 OK\r\n"
	"Content-Type: text/html; charset=UTF-8\r\n"
	"Pragma: no-cache\r\n\r\n"
	"<html>\r\n"
	"<head>\r\n"
	"<tiltle>test</tiltle>\r\n"
	"<head>\r\n"
	"<body>\r\n"
	"<center>\r\n"
	"<hl>test</hl>\r\n"
	"\r\n"
	"<hr>\r\n"
	"<font size=14>\r\n"
	"test\r\n"
	"</font>\r\n"
	"<hr>\r\n"
	"<font size=14>\r\n"
	"Email:huangchaomeng@qq.com\r\n"
	"<hr>\r\n"
	"<font size=24>\r\n"
	"null\r\n"
	"</font>\r\n"
	"</center>\r\n"
	"</body>\r\n"
	"</html>\r\n\0"
	};
	static unsigned char buffer[350]; //数据缓冲区
	
	//检测是否HTTP请求，加入是HTTP请求头部前三位是"GET"
	static unsigned char check_http_header(unsigned char *pbuf, unsigned int mxsize)
	{
	 if(mxsize < 3)
	 return 0;
	 if(pbuf[0] != ISO_G)
	 return 0;
	 if(pbuf[1] != ISO_E)
	 return 0;
	 if(pbuf[2] != ISO_T)
	 return 0;
	 return 1;
	}
	
	static void web_reset(void)
	{
	 unsigned char i;
	 socket_close(SOCKET0);
	 for(i = 0; i < 3; i++)
	 _nop_();
	 socket_init(SOCKET0, 80);
	 socket_listen(SOCKET0);
	}
	
	//获取字符串长度
	static unsigned int __strlen(const unsigned char *pdat)
	{
	 unsigned int ret = 0;
	 while(*pdat != '\0') {
	 ++pdat;
	 ++ret;
	 }
	 return ret;
	}
	
	//回调
	void web_appcall(void)
	{
	 unsigned int size = 0;
	
	 //连接成功
	 if(w5500_connect()) {
	
	 }
	 //断开连接
	 if(w5500_disconnect()) {
	 web_reset();
	 }
	 //发送成功
	 if(w5500_sendok()) {
	
	 }
	 //接收成功
	 if(w5500_recvok()) {
	 //从缓冲区中读取数据
	 size = socket_recv(SOCKET0, buffer, 350);
	 //检查HTTP头
	 if(!check_http_header(buffer, size)) {
	 web_reset();
	 return;
	 }
	 size = __strlen(webdata);
	 //回应HTTP请求数据
	 socket_send(SOCKET0, webdata, size);
	 web_reset();
	 }
	 //超时
	 if(w5500_timeout()) {
	 web_reset();
	 }
	}
试试其它关键字
　W5500　　网卡驱动　
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