W5500使用ioLibrary库创建DHCP客户端
本文还绍了如何配置W5500的网络参数，并通过代码示例展示了如何初始化SPI接口、配置端口、实现DHCP获取在局域网中的本地IP地址。端口0配置为调试端口，端口1配置为DNS客户端，端口2配置DHCP客户端。
W5500是一款全硬件TCP/IP以太网控制器。W5500集成了TCP/IP协议栈,10/100M以太网数据链路
层（MAC）及物理层（PHY），使得用户使用单芯片就能够在他们的应用中拓展网络连接。
支持8个独立端口（Socket）同时通讯,每个端口内嵌32K字节片上缓存以供以太网包处理。
W5500提供了SPI接口，最大支持80MHz速率，W5500支持SPI模式0和模式3。
ioLibrary库下载地址: https://gitcode.com/gh_mirrors/io/ioLibrary_Driver?utm_source=csdn_github_accelerator&isLogin=1
WIZnet全硬件TCP/IP协议栈,支持TCP,UDP,IPv4,ICMP,ARP,IGMP以及PPPoE协议。
以太网：支持BSD和WIZCHIP（W5500/W5300/W5200/W5100/W5100S）的SOCKET APIs驱动程序。
互联网：
DHCP客户端
DNS客户端
FTP客户端
FTP服务器
SNMP代理/陷阱
SNTP客户端
TFTP客户端
HTTP服务器
MQTT客户端
其他功能将陆续添加。
1、将端口0配置调试端口，端口1配置为DNS客户端，端口2配置DHCP客户端
#include "W5500_HD_Driver.h"
#include "stdio.h" //getchar(),putchar(),scanf(),printf(),puts(),gets(),sprintf()
#include "socket.h" // Just include one header for WIZCHIP
#include "string.h" //使能strcpy(),strlen(),memset()
#include "dns.h"
#include "Timer2.h"
#include "dhcp.h"
//W5500的网络参数
//本地物理地址：00 08 DC 11 11 11
//本地IP地址:192.168.1.199
//本地子网掩码: 255.255.255.0
//本地网关：192.168.1.1
//DNS服务器IP地址:8.8.8.8
//配置动态IP地址
wiz_NetInfo gWIZNETINFO = { {0x00, 0x08, 0xdc,0x11, 0x11, 0x11},
{192, 168, 1, 199},
{255,255,255,0},
{192, 168, 1, 1},
{180,76,76,76},//百度的DNS服务器IP
NETINFO_DHCP };
//端口0的网络参数
uint16_t LocalPort0=5000; //端口0的本地端口号(5000)
uint8_t DstIP_Port0[4]={192,168,1,190}; //端口0的远程IP地址：192.168.1.190
uint16_t DstPort_Port0=6000; //端口0的远程端口号：6000
uint8_t gDATABUF[DATA_BUF_SIZE];//STM32接收/发送W5500的数据缓冲区
uint8_t domain_name[]="www.baidu.com";
uint8_t domain_ip[4]={0};//解析到的IP为"36.152.44.132"
uint8_t DNS_get_ip_flag;//DNS获取IP标志
uint8_t dhcp_get_ip_flag;//DHCP获取IP标志
#define DHCP_RETRY_COUNT 3 //DHCP重试次数计数器门槛值
uint8_t dhcp_retry; //DHCP重试次数计数器
void W5500_SPI_Init(void);
void W5500_Initialization(void);
void SOCKET0_Work(void);
void SOCKET1_Work(void);
void SOCKET0_Send_Domain_IP(void);
void SOCKET0_Send_Local_Net_Parameters(void);
void DHCP_Initialization(void);
void SOCKET2_Work(void);
//函数功能:
//初始化SPI1_SCL为PA5,SPI1_MISO为PA6,SPI1_MOSI为PA7,SPI1_CS为PA3;
//设置SPI1的工作模式
void W5500_SPI_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能GPIOA的外设时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE); //使能SPI1的外设时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //选择PIN5,是SPI1的SCL
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //选择引脚为复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //设置引脚的最高工作速率为50MHz
GPIO_Init(GPIOA, &GPIO_InitStructure); //根据GPIO_InitStructure结构指针所指向的参数配置PA5引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //选择PIN6,是SPI1的MISO
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //选择引脚为输入悬浮
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //设置引脚的最高工作速率为50MHz
GPIO_Init(GPIOA, &GPIO_InitStructure); //根据GPIO_InitStructure结构指针所指向的参数配置PA6引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; //选择PIN7,是SPI1的MOSI
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //选择引脚为复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //设置引脚的最高工作速率为50MHz
GPIO_Init(GPIOA, &GPIO_InitStructure); //根据GPIO_InitStructure结构指针所指向的参数配置PA7引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; //选择PIN3,是W5500的片选脚CS
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //选择引脚为推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //设置引脚的最高工作速率为50MHz
GPIO_Init(GPIOA, &GPIO_InitStructure); //根据GPIO_InitStructure结构指针所指向的参数配置PA3引脚
//设置SPI1的工作模式
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
//SPI设置为双线双向全双工
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //设置为主SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //设置SPI发送接收为8位帧结构
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //设置SCK空闲时钟为低电平
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //数据捕获于第1个时钟沿
//SCK空闲时钟为低电平,数据捕获于第1个时钟沿,这样就设置了SPI从机在下降沿采集数据了
//SPI从机在下降沿采集数据,这要求CPU必须在SCK上升沿输出位值,在SCK为高电平时达到稳定,为数据采集做好准备
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //设置NSS输出由SSI位控制
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
//设置波特率预分频值为2
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //设置数据传输先从MSB位开始
SPI_InitStructure.SPI_CRCPolynomial = 7; //使用CRC7校验
SPI_Init(SPI1, &SPI_InitStructure);
SPI_Cmd(SPI1, ENABLE); //使能SPI外设
}
//函数功能:选择W5500
void SPI_CS_Select(void)
{
W5500_CS_low();
}
//函数功能:不选择W5500
void SPI_CS_Deselect(void)
{
W5500_CS_high();
}
//函数功能:从W5500读取一个字节
uint8_t SPI_ReadByte(void)
{
uint8_t byte;
byte=SPI_I2S_ReceiveData(SPI1);//虚读一次
SPI_I2S_SendData(SPI1,0x00);//通过外设SPI1发送0x00为的是发送8个移位时钟
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
//检查SPI1标志位,是否设置"发送缓存空标志位",等待数据寄存器空
byte=SPI_I2S_ReceiveData(SPI1);//读取1个字节数据
return byte;
}
//函数功能:将byte发送给W5500
void SPI_WriteByte(uint8_t byte)
{
SPI_I2S_SendData(SPI1,byte);//通过外设SPI1发送一个数据
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
//检查SPI1标志位,是否设置"发送缓存空标志位",等待数据寄存器空
}
//函数功能:关闭总中断
void SPI_CrisEnter(void)
{
__set_PRIMASK(1);//关闭总中断
}
//函数功能:使能总中断
void SPI_CrisExit(void)
{
__set_PRIMASK(0);//开放总中断
}
//函数功能:装载W5500的本地网络参数和端口0的网络参数
void W5500_Load_Net_Parameters(void)
{
//本地物理地址：00 08 DC 11 11 11
gWIZNETINFO.mac[0]=0x00;
gWIZNETINFO.mac[1]=0x08;
gWIZNETINFO.mac[2]=0xdc;
gWIZNETINFO.mac[3]=0x11;
gWIZNETINFO.mac[4]=0x11;
gWIZNETINFO.mac[5]=0x11;
//本地IP地址:192.168.1.199
gWIZNETINFO.ip[0]=192;
gWIZNETINFO.ip[1]=168;
gWIZNETINFO.ip[2]=1;
gWIZNETINFO.ip[3]=199;
//本地子网掩码: 255.255.255.0
gWIZNETINFO.sn[0]=255;
gWIZNETINFO.sn[1]=255;
gWIZNETINFO.sn[2]=255;
gWIZNETINFO.sn[3]=0;
//本地网关：192.168.1.1
gWIZNETINFO.gw[0]=192;
gWIZNETINFO.gw[1]=168;
gWIZNETINFO.gw[2]=1;
gWIZNETINFO.gw[3]=1;
//DNS服务器IP地址:8.8.8.8
gWIZNETINFO.dns[0]=8;
gWIZNETINFO.dns[1]=8;
gWIZNETINFO.dns[2]=8;
gWIZNETINFO.dns[3]=8;
//DHCP模式
gWIZNETINFO.dhcp=NETINFO_DHCP;
//告诉ioLibrary库,当前使用"动态IP地址"配置
//端口0的本地端口号
LocalPort0=5000;
//端口0的远程IP地址：192.168.1.190
DstIP_Port0[0]=192;
DstIP_Port0[1]=168;
DstIP_Port0[2]=1;
DstIP_Port0[3]=190;
//端口0的远程端口号
DstPort_Port0=6000;
}
/**
* @brief Intialize the network information to be used in WIZCHIP
* @retval None
*/
//函数功能:设置本地网络参数:MAC地址,GW网关,SN子网掩码,本地IP地址,DNS服务器IP地址,DHCP
void network_init(void)
{
uint8_t tmpstr[6];
ctlnetwork(CN_SET_NETINFO, (void*)&gWIZNETINFO);
//设置本地网络参数:MAC地址,GW网关,SN子网掩码,本地IP地址,DNS服务器IP地址,DHCP
//设置MAC地址,将gWIZNETINFO.mac写入W5500;
//设置网关,将gWIZNETINFO.gw写入W5500;
//设置子网掩码,将gWIZNETINFO.sn写入W5500
//设置本地IP地址,将gWIZNETINFO.ip写入W5500
//将gWIZNETINFO.dns[]拷贝到_DNS_[]中
//将gWIZNETINFO.dhcp保存到_DHCP_中
ctlnetwork(CN_GET_NETINFO, (void*)&gWIZNETINFO);
//读本地网络参数:MAC地址,GW网关,SN子网掩码,本地IP地址,DNS服务器IP地址,DHCP
//读MAC地址,保存到gWIZNETINFO.mac
//读网关,保存到gWIZNETINFO.gw
//读子网掩码,保存到gWIZNETINFO.sn
//读本地IP地址,保存到gWIZNETINFO.ip
//将_DNS_[]拷贝到gWIZNETINFO.dns[]中
//将_DHCP_保存到gWIZNETINFO.dhcp中
ctlwizchip(CW_GET_ID,(void*)tmpstr);
//读W5500的ID,保存到tmpstr[6]中,"W5500\0",这是ioLibrary驱动定义的ID;
//在wizchip_conf.h中定义_WIZCHIP_ID_为"W5500\0"
printf("\r\n=== %s NET CONF ===\r\n",(char*)tmpstr);
//串口输出W5500的ID
printf("MAC: %02X:%02X:%02X:%02X:%02X:%02X\r\n",gWIZNETINFO.mac[0],gWIZNETINFO.mac[1],gWIZNETINFO.mac[2],
gWIZNETINFO.mac[3],gWIZNETINFO.mac[4],gWIZNETINFO.mac[5]);//串口输出W5500的MAC地址
printf("SIP: %d.%d.%d.%d\r\n", gWIZNETINFO.ip[0],gWIZNETINFO.ip[1],gWIZNETINFO.ip[2],gWIZNETINFO.ip[3]);
//串口输出W5500的IP地址
printf("GAR: %d.%d.%d.%d\r\n", gWIZNETINFO.gw[0],gWIZNETINFO.gw[1],gWIZNETINFO.gw[2],gWIZNETINFO.gw[3]);
//串口输出W5500的网关地址
printf("SUB: %d.%d.%d.%d\r\n", gWIZNETINFO.sn[0],gWIZNETINFO.sn[1],gWIZNETINFO.sn[2],gWIZNETINFO.sn[3]);
//串口输出W5500的子网掩码
printf("DNS: %d.%d.%d.%d\r\n", gWIZNETINFO.dns[0],gWIZNETINFO.dns[1],gWIZNETINFO.dns[2],gWIZNETINFO.dns[3]);
//串口输出W5500的DNS服务器IP地址
printf("======================\r\n");
}
//函数功能:
//1.初始化SPI接口
//2.注册相关函数
//3.设置W5500每个端口的发送缓冲区和接收缓冲区的大小均为2K字节
//4.等待"以太网"连接完成
//5.装载本地网络参数
//6.设置本地网络参数:MAC地址,GW网关,SN子网掩码,本地IP地址,DNS服务器IP地址,DHCP
void W5500_Initialization(void)
{
uint8_t memsize[2][8] = {{2,2,2,2,2,2,2,2},{2,2,2,2,2,2,2,2}};
//W5500发送和接收各有8个端口,这里定义每个端口的发送缓冲区和接收缓冲区的大小均为2K字节
uint8_t tmp;
W5500_SPI_Init(); //W5500 SPI初始化配置
// W5500_RST_Init(); //W5500 RST引脚初始化
// W5500_INT_Init(); //W5500 INT引脚初始化
// W5500_Hardware_Reset(); //硬件复位W5500
reg_wizchip_cris_cbfunc(SPI_CrisEnter, SPI_CrisExit); //注册临界区函数
reg_wizchip_cs_cbfunc(SPI_CS_Select, SPI_CS_Deselect);//注册SPI片选信号函数
reg_wizchip_spi_cbfunc(SPI_ReadByte, SPI_WriteByte); //注册读写函数
if(ctlwizchip(CW_INIT_WIZCHIP,(void*)memsize) == -1)
{//W5500发送和接收各有8个端口,这里初始化每个端口的发送缓冲区和接收缓冲区的大小均为2K字节
printf("WIZCHIP Initialized fail.\r\n");
}
//等待"以太网"连接完成, PHY link status check
do{
if(ctlwizchip(CW_GET_PHYLINK, (void*)&tmp) == -1)
{//读PHYCFGR寄存器bit0,若为1,则表示网络已经连接
printf("Unknown PHY Link stauts.\r\n");
}
}while(tmp == PHY_LINK_OFF);
W5500_Load_Net_Parameters();//装载W5500的本地网络参数和端口0的网络参数
TIM2_Interrupt_Initializtion(1000,72);//当arr=1000,psc=72时,则为1ms,误差为1us;
DHCP_Initialization();
// network_init();//设置本地网络参数:MAC地址,GW网关,SN子网掩码,本地IP地址,DNS服务器IP地址,DHCP
// SOCKET1_Work();//端口1把域名"www.baidu.com"解析为IP地址
}
//函数功能:W5500端口0工作,用作输出调试数据
void SOCKET0_Work(void)
{
uint16_t len=0;
switch(getSn_SR(SOCK_TCPS))//获取W5500端口0的状态寄存器
{
case SOCK_INIT://W5500端口0已经初始化
connect(SOCK_TCPS,DstIP_Port0,DstPort_Port0);
//将W5500端口0连接到远程IP地址DstIP_Port0和远程端口DstPort_Port0上
break;
case SOCK_ESTABLISHED://W5500端口0已经连接成功
if(getSn_IR(SOCK_TCPS) & Sn_IR_CON)
{//读端口0的Sn_IR中断标志寄存器的bit0
setSn_IR(SOCK_TCPS, Sn_IR_CON);//回写清除中断标志
}
len=getSn_RX_RSR(SOCK_TCPS);
//读端口0接收缓冲区的数据长度
if(len)
{
recv(SOCK_TCPS,gDATABUF,len);//读"W5500端口0"的数据,长度为len个字节,保存到gDATABUF
printf("%s\r\n",gDATABUF);
send(SOCK_TCPS,gDATABUF,len);//将gDATABUF的前len个字节通过"W5500端口0"发送出去
}
SOCKET0_Send_Local_Net_Parameters();//发送通过DHCP获取到的本地IP地址
SOCKET0_Send_Domain_IP();//发送域名解析到的IP地址
break;
case SOCK_CLOSE_WAIT://W5500端口0处于等待关闭状态
disconnect(SOCK_TCPS);//关闭端口0的连接
break;
case SOCK_CLOSED://W5500端口0处于关闭状态
socket(SOCK_TCPS,Sn_MR_TCP,LocalPort0,0x00);//打开Socket0，打开一个本地端口
break;
}
}
/*
纯净 无劫持 无需再忍受被强扭去看广告或粗俗网站之痛苦
服务ip为：114.114.114.114 和 114.114.115.115
拦截 钓鱼病毒木马网站 增强网银、证券、购物、游戏、隐私信息安全
服务ip为：114.114.114.119 和 114.114.115.119
学校或家长可选拦截 色情网站 保护少年儿童免受网络色情内容的毒害
服务ip为：114.114.114.110 和 114.114.115.110
*/
//函数功能:端口1把域名"www.baidu.com"解析为IP地址
//DNS功能:DNS就是把域名解析为IP地址
void SOCKET1_Work(void)
{
int32_t ret = 0;
//www.baidu.com的IP为"36.152.44.132"或" 36.152.44.93"
strcpy((char*)domain_name,"www.baidu.com");//准备域名
//准备DNS服务器IP地址
gWIZNETINFO.dns[0]=114;
gWIZNETINFO.dns[1]=114;
gWIZNETINFO.dns[2]=114;
gWIZNETINFO.dns[3]=114;
/* DNS client initialization */
DNS_init(SOCK_DNS, gDATABUF);
//端口1将gDATABUF用作DNS信息缓冲区
Timer_Start();
/* DNS procssing */
if ((ret = DNS_run(gWIZNETINFO.dns, domain_name, domain_ip)) > 0)
{
// try to 1st DNS
printf("> 1st DNS Reponsed\r\n");
}
else if(ret == -1)
{
printf("> MAX_DOMAIN_NAME is too small. Should be redefined it.\r\n");
Timer_Stop();
while(1);
}
else
{
printf("> DNS Failed\r\n");
Timer_Stop();
while(1);
}
if(ret > 0)//DNS解析成功
{
DNS_get_ip_flag=1;
printf("> Translated %s to %d.%d.%d.%d\r\n",domain_name,domain_ip[0],domain_ip[1],domain_ip[2],domain_ip[3]);
}
Timer_Stop();
}
//函数功能:发送域名解析到的IP地址
void SOCKET0_Send_Domain_IP(void)
{
char buf[20];
uint16_t len=0;
memset(gDATABUF,'\0',sizeof(gDATABUF));
strcpy(buf,"DNS Result:\r\n");strcat((char*)gDATABUF,buf);
strcat((char*)gDATABUF,(char*)domain_name);
strcpy(buf,": ");strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",domain_ip[0]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",domain_ip[1]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",domain_ip[2]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u",domain_ip[3]);strcat((char*)gDATABUF,buf);
strcpy(buf,"\r\n");strcat((char*)gDATABUF,buf);
len=strlen( (char*)gDATABUF );
send(SOCK_TCPS,gDATABUF,len);//发送数据
}
/*
MAC: 00 08 DC 11 11 11
Local IP: 192.168.1.241
LocalGateway: 192.168.1.1
LocalSubnetMask: 255.255.255.0
*/
//函数功能:发送通过DHCP获取到的本地IP地址
void SOCKET0_Send_Local_Net_Parameters(void)
{
char buf[20];
uint16_t len=0;
memset(gDATABUF,'\0',sizeof(gDATABUF));
strcpy(buf,"DHCP Result:\r\n");strcat((char*)gDATABUF,buf);
strcpy(buf,"MAC: ");strcat((char*)gDATABUF,buf);
sprintf(buf,"%02X ",gWIZNETINFO.mac[0]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%02X ",gWIZNETINFO.mac[1]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%02X ",gWIZNETINFO.mac[2]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%02X ",gWIZNETINFO.mac[3]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%02X ",gWIZNETINFO.mac[4]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%02X ",gWIZNETINFO.mac[5]);strcat((char*)gDATABUF,buf);
strcpy(buf,"\r\n");strcat((char*)gDATABUF,buf);
len=strlen( (char*)gDATABUF );
strcpy(buf,"Local IP: ");strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",gWIZNETINFO.ip[0]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",gWIZNETINFO.ip[1]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",gWIZNETINFO.ip[2]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u",gWIZNETINFO.ip[3]);strcat((char*)gDATABUF,buf);
strcpy(buf,"\r\n");strcat((char*)gDATABUF,buf);
strcpy(buf,"LocalGateway: ");strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",gWIZNETINFO.gw[0]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",gWIZNETINFO.gw[1]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",gWIZNETINFO.gw[2]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u",gWIZNETINFO.gw[3]);strcat((char*)gDATABUF,buf);
strcpy(buf,"\r\n");strcat((char*)gDATABUF,buf);
strcpy(buf,"LocalSubnetMask: ");strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",gWIZNETINFO.sn[0]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",gWIZNETINFO.sn[1]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u.",gWIZNETINFO.sn[2]);strcat((char*)gDATABUF,buf);
sprintf(buf,"%u",gWIZNETINFO.sn[3]);strcat((char*)gDATABUF,buf);
strcpy(buf,"\r\n");strcat((char*)gDATABUF,buf);
len=strlen( (char*)gDATABUF );
send(SOCK_TCPS,gDATABUF,len);//发送数据
}
//请求IP地址函数
void dhcp_assign(void)
{
uint8_t tmpstr[6];
getIPfromDHCP(gWIZNETINFO.ip);//读本地IP地址
getGWfromDHCP(gWIZNETINFO.gw);
getSNfromDHCP(gWIZNETINFO.sn);
getDNSfromDHCP(gWIZNETINFO.dns);
gWIZNETINFO.dhcp = NETINFO_DHCP;
ctlnetwork(CN_SET_NETINFO, (void*)&gWIZNETINFO);
//设置本地网络参数:MAC地址,GW网关,SN子网掩码,本地IP地址,DNS服务器IP地址,DHCP
//设置MAC地址,将gWIZNETINFO.mac写入W5500;
//设置网关,将gWIZNETINFO.gw写入W5500;
//设置子网掩码,将gWIZNETINFO.sn写入W5500
//设置本地IP地址,将gWIZNETINFO.ip写入W5500
//将gWIZNETINFO.dns[]拷贝到_DNS_[]中
//将gWIZNETINFO.dhcp保存到_DHCP_中
ctlnetwork(CN_GET_NETINFO, (void*)&gWIZNETINFO);
//读本地网络参数:MAC地址,GW网关,SN子网掩码,本地IP地址,DNS服务器IP地址,DHCP
//读MAC地址,保存到gWIZNETINFO.mac
//读网关,保存到gWIZNETINFO.gw
//读子网掩码,保存到gWIZNETINFO.sn
//读本地IP地址,保存到gWIZNETINFO.ip
//将_DNS_[]拷贝到gWIZNETINFO.dns[]中
//将_DHCP_保存到gWIZNETINFO.dhcp中
ctlwizchip(CW_GET_ID,(void*)tmpstr);
//读W5500的ID,保存到tmpstr[6]中,"W5500\0",这是ioLibrary驱动定义的ID;
//在wizchip_conf.h中定义_WIZCHIP_ID_为"W5500\0"
printf("\r\n=== %s NET CONF ===\r\n",(char*)tmpstr);
//串口输出W5500的ID
printf("MAC: %02X:%02X:%02X:%02X:%02X:%02X\r\n",gWIZNETINFO.mac[0],gWIZNETINFO.mac[1],gWIZNETINFO.mac[2],
gWIZNETINFO.mac[3],gWIZNETINFO.mac[4],gWIZNETINFO.mac[5]);//串口输出W5500的MAC地址
printf("SIP: %d.%d.%d.%d\r\n", gWIZNETINFO.ip[0],gWIZNETINFO.ip[1],gWIZNETINFO.ip[2],gWIZNETINFO.ip[3]);
//串口输出W5500的IP地址
printf("GAR: %d.%d.%d.%d\r\n", gWIZNETINFO.gw[0],gWIZNETINFO.gw[1],gWIZNETINFO.gw[2],gWIZNETINFO.gw[3]);
//串口输出W5500的网关地址
printf("SUB: %d.%d.%d.%d\r\n", gWIZNETINFO.sn[0],gWIZNETINFO.sn[1],gWIZNETINFO.sn[2],gWIZNETINFO.sn[3]);
//串口输出W5500的子网掩码
printf("DNS: %d.%d.%d.%d\r\n", gWIZNETINFO.dns[0],gWIZNETINFO.dns[1],gWIZNETINFO.dns[2],gWIZNETINFO.dns[3]);
//串口输出W5500的DNS服务器IP地址
printf("======================\r\n");
printf("DHCP LEASED TIME:%u Sec.\r\n",getDHCPLeasetime());
}
void dhcp_update(void)
{
dhcp_assign();
}
//IP地址冲突函数
void dhcp_conflict(void)
{
printf("CONFLICT IP from DHCP\r\n");
while(1);
}
//DHCP初始化函数
void DHCP_Initialization(void)
{
setSHAR(gWIZNETINFO.mac);//寄存器设置mac地址
printf(" DHCP client running \r\n");
DHCP_init(SOCKET_DHCP,gDATABUF);//使用端口2初始化DHCP
reg_dhcp_cbfunc(dhcp_assign, dhcp_update, dhcp_conflict);
dhcp_retry = 0;
}
//函数功能;W5500端口2工作:使用端口2获取动态IP地址
void SOCKET2_Work(void)
{
uint8_t retval = 0;
if (gWIZNETINFO.dhcp == NETINFO_DHCP)
{
retval = DHCP_run();
if (retval == DHCP_IP_LEASED)
{
if (dhcp_get_ip_flag == 0)
{
printf("DHCP success\r\n");
dhcp_get_ip_flag = 1;//本地获取到IP地址
}
}
else if (retval == DHCP_FAILED)
{
dhcp_get_ip_flag = 0;
dhcp_retry++;
if (dhcp_retry <= DHCP_RETRY_COUNT)
{
printf(" DHCP timeout occurred and retry %d \r\n", dhcp_retry);
}
}
if (dhcp_retry > DHCP_RETRY_COUNT)
{
printf(" DHCP failed \r\n");
DHCP_stop();
while (1);
}
}
if(dhcp_get_ip_flag)//本地获取到IP地址
{
if(DNS_get_ip_flag==0)
{
network_init();//设置本地网络参数:MAC地址,GW网关,SN子网掩码,本地IP地址,DNS服务器IP地址,DHCP
SOCKET1_Work();//端口1把域名"www.baidu.com"解析为IP地址
}
SOCKET0_Work();//W5500端口0工作,用作输出调试数据
}
}
2、W5500_HD_Driver.h头文件
#ifndef _W5500_HD_Driver_H_
#define _W5500_HD_Driver_H_#include "stm32f10x.h"//使能uint8_t,uint16_t,uint32_t,uint64_t,int8_t,int16_t,int32_t,int64_t
#include "wizchip_conf.h"extern wiz_NetInfo gWIZNETINFO;//W5500的网络参数#define SOCK_TCPS 0 //端口0用来连接网络调试助手
#define SOCK_DNS 1 //端口1用作域名解析
#define SOCKET_DHCP 2 //端口2用作DHCPextern uint16_t LocalPort0; //端口0的端口号
extern uint8_t DstIP_Port0[4]; //端口0的远程IP地址
extern uint16_t DstPort_Port0; //端口0的远程端口号#define DATA_BUF_SIZE 2048
extern uint8_t gDATABUF[DATA_BUF_SIZE];#define W5500_CS_high() GPIO_SetBits(GPIOA,GPIO_Pin_4) //W5500片选引脚
#define W5500_CS_low() GPIO_ResetBits(GPIOA,GPIO_Pin_4) //W5500片选引脚extern void W5500_Initialization(void);
extern void SOCKET0_Work(void);
extern void SOCKET2_Work(void);
#endif3、Timer2.c
#include "Timer2.h"
#include "dns.h"
#include "dhcp.h"uint16_t TIM2_CNT;void TIM2_Interrupt_Initializtion(u16 arr,u16 psc);//APB1时钟为36MHz
//arr：自动重装值。
//psc：时钟预分频数
//TIM_CKD_DIV1：定时器时钟 = 输入频率
//TIM_CKD_DIV2：定时器时钟 = 输入频率/2
//TIM_CKD_DIV4：定时器时钟 = 输入频率/4
//TIM2_Interrupt_Initializtion(1000,72);//当arr=1000,psc=72时,则为1ms,误差为1us;
void TIM2_Interrupt_Initializtion(u16 arr,u16 psc)
{TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;//声明一个TIM_TimeBaseInitTypeDef类型的结构变量TIM_TimeBaseStructureNVIC_InitTypeDef NVIC_InitStructure;RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); //使能定时器TIM2的APB1外设时钟TIM_TimeBaseStructure.TIM_Period=(arr-1);//自动重装载寄存器周期的值(计数值)TIM_TimeBaseStructure.TIM_Prescaler=(psc-1);//设置用来作为TIMx时钟频率除数的预分频值TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;//设置时钟分割:TDTS = Tck_tim//计算公式:arr*psc/72000000/1,当arr=1000,psc=36时,则为1ms,误差为1us;TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;//TIM向上计数模式 TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);//根据指定的参数初始化TIMx的时间基数单位TIM_SetCounter(TIM2,0); //设置TIM2的计数器值为0;TIM_ClearFlag(TIM2, TIM_FLAG_Update); //清除TIM2溢出的待处理标志位TIM_ClearITPendingBit(TIM2, TIM_IT_Update ); //清除TIM2中断的待处理位TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE ); //允许TIM2溢出产生中断//中断优先级NVIC设置//NVIC_PriorityGroup_4设置NVIC中断分组4:表示抢占优先级为4位,取值为0~15,没有响应优先级,取值为0//NVIC_PriorityGroup_3设置NVIC中断分组3:表示抢占优先级为3位,取值为0~7,响应优先级只有1位,取值为0~1//NVIC_PriorityGroup_2设置NVIC中断分组3:表示抢占优先级为2位,取值为0~3,响应优先级只有2位,取值为0~3//NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);//设置系统中断优先级分组4NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; //TIM2中断NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //设置抢占优先级为0NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //设置响应优先级为0NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化NVIC嵌套向量中断控制寄存器TIM_Cmd(TIM2, ENABLE);//使能TIM2模块RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,DISABLE);//先关闭TIM2时钟,等待使用
}//函数功能:TIM2每1ms中断一次
void TIM2_IRQHandler(void)
{if ( TIM_GetITStatus(TIM2 , TIM_IT_Update) != RESET ) {TIM2_CNT++;if(TIM2_CNT>1000){TIM2_CNT=0;DNS_time_handler(); //DNS里面有一个超时机制DHCP_time_handler(); //DHCP里面有一个超时机制}TIM_ClearITPendingBit(TIM2 , TIM_FLAG_Update); }
}5、Timer2.h
#ifndef _Timer2_H
#define _Timer2_H#include "stm32f10x.h"//使能uint8_t,uint16_t,uint32_t,uint64_t,int8_t,int16_t,int32_t,int64_t#define Timer_Start() RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); //使能定时器TIM2的APB1外设时钟
#define Timer_Stop() RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,DISABLE); //不使能定时器TIM2的APB1外设时钟
extern void TIM2_Interrupt_Initializtion(u16 arr,u16 psc);#endif6、main.c文件
#include "stm32f10x.h"//使能uint8_t,uint16_t,uint32_t,uint64_t,int8_t,int16_t,int32_t,int64_t
#include "stdio.h" //getchar(),putchar(),scanf(),printf(),puts(),gets(),sprintf()
#include "string.h" //使能strcpy(),strlen(),memset()
#include "delay.h"
#include "USART4.h"#include "LED.h"
#include "W5500_HD_Driver.h"//#include "W5500_Variable.h"const char CPU_Reset_REG[]="\r\nCPU reset!\r\n";
int main(void)
{// SCB->VTOR = 0x8000000;//中断向量表重定义// SystemInit();delay_init();//延时函数初始化NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);//设置系统中断优先级分组4USART4_Serial_Interface_Enable(115200);printf("%s",CPU_Reset_REG);//调试串口输出"\r\nCPU reset!\r\n"W5500_Initialization();//1.初始化SPI接口//2.注册相关函数//3.设置W5500每个端口的发送缓冲区和接收缓冲区的大小均为2K字节//4.等待"以太网"连接完成//5.装载本地网络参数//6.设置本地网络参数:MAC地址,GW网关,SN子网掩码,本地IP地址,DNS服务器IP地址,DHCPLED_Init();LED0_ON();while(1){LED0=!LED0;delay_ms(1000);SOCKET2_Work();//W5500端口2工作:使用端口2获取动态IP地址}
}