文章来源：http://www.embed-net.com/thread-55-1-1.html
（此论坛为一个WIZnet用户开设的，论坛积累了大量的W5500相关应用及例程，具有很大的参考价值。）
官方提供了W5500的最新驱动库，下载地址如下：
http://wizwiki.net/wiki/doku.php?id=products:w5500:driver
下面简单介绍下如何使用这套库
首先下载库源码，文件目录如下所示：
W5500和MCU是通过SPI接口通信的，库是利用如下结构体中的相关函数指针实现SPI通信和其他功能。
_WIZCHIP WIZCHIP = { .id = _WIZCHIP_ID_,
.if_mode = _WIZCHIP_IO_MODE_,
.CRIS._enter = wizchip_cris_enter,
.CRIS._exit = wizchip_cris_exit,
.CS._select = wizchip_cs_select,
.CS._deselect = wizchip_cs_deselect,
.IF.BUS._read_byte = wizchip_bus_readbyte,
.IF.BUS._write_byte = wizchip_bus_writebyte
// .IF.SPI._read_byte = wizchip_spi_readbyte,
// .IF.SPI._write_byte = wizchip_spi_writebyte
};
根据函数名字和库中的注释，我们这里也对要实现的函数做个简单的说明
wizchip_cris_enter ：进入临界区的函数，可以不管
wizchip_cris_exit ：退出临界区的函数，也可以不管
wizchip_cs_select ：输出有效片选信号的函数，也就是控制CS输出低电平的函数，必须实现
wizchip_cs_deselect ：控制CS输出高电平的函数，必须实现
wizchip_bus_readbyte ：SPI总线读取一字节数据函数，必须实现
wizchip_bus_writebyte ：SPI总线写一字节数据函数，必须实现
根据以上可知，只要实现了SPI的基本操作，移植基本完成，是不是很简单
下面我们就新建一个spi.c的文件来实现这几个函数，当然这些函数名字可以不和这个结构体里面的函数名字一样，到时候可以调用相关的函数注册下即可
/** ****************************************************************************** * @file spi.c * $Author: 飞鸿踏雪 $ * $Revision: 17 $ * $Date:: 2014-10-25 11:16:48 +0800 #$ * @brief SPI驱动函数实现. ****************************************************************************** * @attention * *<h3><center>? Copyright 2009-2012, EmbedNet</center> *<center><a href="http:\\[url]www.embed-net.com[/url]">[url]http://www.embed-net.com[/url]</a></center> *<center>All Rights Reserved</center></h3> * ****************************************************************************** *//* Includes ------------------------------------------------------------------*/#include "main.h"/* Private typedef -----------------------------------------------------------*//* Private define ------------------------------------------------------------*//* Private macro -------------------------------------------------------------*//* Private variables ---------------------------------------------------------*//* Private function prototypes -----------------------------------------------*//* Private functions ---------------------------------------------------------*//** * @brief 使能SPI时钟 * @retval None */static void SPI_RCC_Configuration(void){ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_SPI1,ENABLE);}/** * @brief 配置指定SPI的引脚 * @retval None */static void SPI_GPIO_Configuration(void){ GPIO_InitTypeDef GPIO_InitStruct; //PA4->CS,PA5->SCK,PA6->MISO,PA7->MOSI GPIO_InitStruct.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6|GPIO_Pin_7; GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStruct); //初始化片选输出引脚 GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4; GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOA, &GPIO_InitStruct); GPIO_SetBits(GPIOA,GPIO_Pin_4);}/** * @brief 根据外部SPI设备配置SPI相关参数 * @retval None */void SPI_Configuration(void){ SPI_InitTypeDef SPI_InitStruct; SPI_RCC_Configuration(); SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2; SPI_InitStruct.SPI_Direction= SPI_Direction_2Lines_FullDuplex; SPI_InitStruct.SPI_Mode = SPI_Mode_Master; SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b; SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low; SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge; SPI_InitStruct.SPI_NSS = SPI_NSS_Soft; SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStruct.SPI_CRCPolynomial = 7; SPI_Init(SPI1,&SPI_InitStruct); SPI_GPIO_Configuration(); SPI_SSOutputCmd(SPI1, ENABLE); SPI_Cmd(SPI1, ENABLE);}/** * @brief 写1字节数据到SPI总线 * @param TxData 写到总线的数据 * @retval None */void SPI_WriteByte(uint8_t TxData){ while((SPI1->SR&SPI_I2S_FLAG_TXE)==0); //等待发送区空 SPI1->DR=TxData; //发送一个byte while((SPI1->SR&SPI_I2S_FLAG_RXNE)==0); //等待接收完一个byte SPI1->DR; }/** * @brief 从SPI总线读取1字节数据 * @retval 读到的数据 */uint8_t SPI_ReadByte(void){ while((SPI1->SR&SPI_I2S_FLAG_TXE)==0); //等待发送区空 SPI1->DR=0xFF; //发送一个空数据产生输入数据的时钟 while((SPI1->SR&SPI_I2S_FLAG_RXNE)==0); //等待接收完一个byte return SPI1->DR; }/** * @brief 进入临界区 * @retval None */void SPI_CrisEnter(void){ __set_PRIMASK(1);}/** * @brief 退出临界区 * @retval None */void SPI_CrisExit(void){ __set_PRIMASK(0);}/** * @brief 片选信号输出低电平 * @retval None */void SPI_CS_Select(void){ GPIO_ResetBits(GPIOA,GPIO_Pin_4);}/** * @brief 片选信号输出高电平 * @retval None */void SPI_CS_Deselect(void){ GPIO_SetBits(GPIOA,GPIO_Pin_4);}/*********************************END OF FILE**********************************/ // First of all, Should register SPI callback functions implemented by user for accessing WIZCHIP /* Critical section callback */ reg_wizchip_cris_cbfunc(SPI_CrisEnter, SPI_CrisExit); //注册临界区函数 /* Chip selection call back */#if _WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_VDM_ reg_wizchip_cs_cbfunc(SPI_CS_Select, SPI_CS_Deselect);//注册SPI片选信号函数#elif _WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_FDM_ reg_wizchip_cs_cbfunc(SPI_CS_Select, SPI_CS_Deselect); // CS must be tried with LOW.#else #if (_WIZCHIP_IO_MODE_ & _WIZCHIP_IO_MODE_SIP_) != _WIZCHIP_IO_MODE_SIP_ #error "Unknown _WIZCHIP_IO_MODE_" #else reg_wizchip_cs_cbfunc(wizchip_select, wizchip_deselect); #endif#endif /* SPI Read & Write callback function */ reg_wizchip_spi_cbfunc(SPI_ReadByte, SPI_WriteByte); //注册读写函数/** * @brief Intialize the network information to be used in WIZCHIP * @retval None */void network_init(void){ uint8_t tmpstr[6]; ctlnetwork(CN_SET_NETINFO, (void*)&gWIZNETINFO); ctlnetwork(CN_GET_NETINFO, (void*)&gWIZNETINFO); // Display Network Information ctlwizchip(CW_GET_ID,(void*)tmpstr); printf("\r\n=== %s NET CONF ===\r\n",(char*)tmpstr); 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]); printf("SIP: %d.%d.%d.%d\r\n", gWIZNETINFO.ip[0],gWIZNETINFO.ip[1],gWIZNETINFO.ip[2],gWIZNETINFO.ip[3]); printf("GAR: %d.%d.%d.%d\r\n", gWIZNETINFO.gw[0],gWIZNETINFO.gw[1],gWIZNETINFO.gw[2],gWIZNETINFO.gw[3]); printf("SUB: %d.%d.%d.%d\r\n", gWIZNETINFO.sn[0],gWIZNETINFO.sn[1],gWIZNETINFO.sn[2],gWIZNETINFO.sn[3]); printf("DNS: %d.%d.%d.%d\r\n", gWIZNETINFO.dns[0],gWIZNETINFO.dns[1],gWIZNETINFO.dns[2],gWIZNETINFO.dns[3]); printf("======================\r\n");}/** * @brief Loopback Test Example Code using ioLibrary_BSD * @retval None */int32_t loopback_tcps(uint8_t sn, uint8_t* buf, uint16_t port){ int32_t ret; uint16_t size = 0, sentsize=0; switch(getSn_SR(sn)) { case SOCK_ESTABLISHED : if(getSn_IR(sn) & Sn_IR_CON) { printf("%d:Connected\r\n",sn); setSn_IR(sn,Sn_IR_CON); } if((size = getSn_RX_RSR(sn)) > 0) { if(size > DATA_BUF_SIZE) size = DATA_BUF_SIZE; ret = recv(sn,buf,size); if(ret <= 0) return ret; sentsize = 0; while(size != sentsize) { ret = send(sn,buf+sentsize,size-sentsize); if(ret < 0) { close(sn); return ret; } sentsize += ret; // Don't care SOCKERR_BUSY, because it is zero. } } break; case SOCK_CLOSE_WAIT : printf("%d:CloseWait\r\n",sn); if((ret=disconnect(sn)) != SOCK_OK) return ret; printf("%d:Closed\r\n",sn); break; case SOCK_INIT : printf("%d:Listen, port [%d]\r\n",sn, port); if( (ret = listen(sn)) != SOCK_OK) return ret; break; case SOCK_CLOSED: printf("%d:LBTStart\r\n",sn); if((ret=socket(sn,Sn_MR_TCP,port,0x00)) != sn) return ret; printf("%d:Opened\r\n",sn); break; default: break; } return 1;}/** * @brief Loopback Test Example Code using ioLibrary_BSD * @retval None */int32_t loopback_udps(uint8_t sn, uint8_t* buf, uint16_t port){ int32_t ret; uint16_t size, sentsize; uint8_t destip[4]; uint16_t destport; //uint8_t packinfo = 0; switch(getSn_SR(sn)) { case SOCK_UDP : if((size = getSn_RX_RSR(sn)) > 0) { if(size > DATA_BUF_SIZE) size = DATA_BUF_SIZE; ret = recvfrom(sn,buf,size,destip,(uint16_t*)&destport); if(ret <= 0) { printf("%d: recvfrom error. %ld\r\n",sn,ret); return ret; } size = (uint16_t) ret; sentsize = 0; while(sentsize != size) { ret = sendto(sn,buf+sentsize,size-sentsize,destip,destport); if(ret < 0) { printf("%d: sendto error. %ld\r\n",sn,ret); return ret; } sentsize += ret; // Don't care SOCKERR_BUSY, because it is zero. } } break; case SOCK_CLOSED: printf("%d:LBUStart\r\n",sn); if((ret=socket(sn,Sn_MR_UDP,port,0x00)) != sn) return ret; printf("%d:Opened, port [%d]\r\n",sn, port); break; default : break; } return 1;}/** * @brief Loopback Test Example Code using ioLibrary_BSD * @retval None */void platform_init(void){ SystemInit();//系统时钟初始化 USART_Configuration();//串口1初始化 printf("\x0c");printf("\x0c");//超级终端清屏 printf("\033[1;40;32m");//设置超级终端背景为黑色，字符为绿色 printf("\r\n*******************************************************************************"); printf("\r\n************************ Copyright 2009-2014, EmbedNet ************************"); printf("\r\n*************************** [url]http://www.embed-net.com[/url] **************************"); printf("\r\n***************************** All Rights Reserved *****************************"); printf("\r\n*******************************************************************************"); printf("\r\n"); //Config SPI SPI_Configuration(); //延时初始化 delay_init();}
能ping通，看来没什么大问题了
程序源码下载：请参考文章上方原文链接。
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