转载地址:https://blog.youkuaiyun.com/wiznet2012/article/details/41279113
(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:
我们主要用到Ethernet文件夹下面的文件,将这些文件加入到自己的工程中,然后编译,若编译出现类似于如下错误
..\User\Ethernet\wizchip_conf.c(113): error: #29: expected an expression
.id = _WIZCHIP_ID_,
..\User\Ethernet\wizchip_conf.c(114): error: #29: expected an expression
.if_mode = _WIZCHIP_IO_MODE_,
..\User\Ethernet\wizchip_conf.c(115): error: #29: expected an expression
.CRIS._enter = wizchip_cris_enter,
..\User\Ethernet\wizchip_conf.c(116): error: #29: expected an expression
.CRIS._exit = wizchip_cris_exit,
..\User\Ethernet\wizchip_conf.c(117): error: #29: expected an expression
.CS._select = wizchip_cs_select,
..\User\Ethernet\wizchip_conf.c(118): error: #29: expected an expression
.CS._deselect = wizchip_cs_deselect,
..\User\Ethernet\wizchip_conf.c(119): error: #29: expected an expression
.IF.BUS._read_byte = wizchip_bus_readbyte,
..\User\Ethernet\wizchip_conf.c(120): error: #29: expected an expression
.IF.BUS._write_byte = wizchip_bus_writebyte
..\User\Ethernet\wizchip_conf.c(123): warning: #12-D: parsing restarts here after previous syntax error
};
..\User\Ethernet\wizchip_conf.c: 1 warning, 8 errors
则需要根据自己的编译器做下设置,keil MDK设置如下所示:
主要原因是Keil MDK默认设置不支持按照结构体名称初始化结构体的原因导致。
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**********************************/
但是这些SPI的接口函数如何跟这套库衔接呢?不用怕,库提供有这样的函数来注册,只要在主函数中调用下就可以了,具体程序如下
// 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。