（二）原创调试W5500芯片--W5500的初始化过程

一、SPI的配置过程

1.使能SPI时钟

1 /**
2   * @brief  使能SPI时钟
3   * @retval None
4   */
5 static void SPI_RCC_Configuration(void)
6 {
7     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_SPI1,ENABLE);
8 }

2.配置指定SPI的引脚

 1 /**
 2   * @brief  配置指定SPI的引脚
 3   * @retval None
 4   */
 5 static void SPI_GPIO_Configuration(void)
 6 {
 7     GPIO_InitTypeDef GPIO_InitStruct;
 8     //PA4->CS,PA5->SCK,PA6->MISO,PA7->MOSI                              
 9     GPIO_InitStruct.GPIO_Pin =  GPIO_Pin_5 | GPIO_Pin_6|GPIO_Pin_7;
10     GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
11     GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP; 
12     GPIO_Init(GPIOA, &GPIO_InitStruct);
13     //初始化片选输出引脚
14     GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4;
15     GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
16     GPIO_Init(GPIOA, &GPIO_InitStruct);
17     GPIO_SetBits(GPIOA,GPIO_Pin_4);
18 }

3.根据外部SPI设备配置SPI相关参数

 1 /**
 2   * @brief  根据外部SPI设备配置SPI相关参数
 3   * @retval None
 4   */
 5 void SPI_Configuration(void)
 6 {
 7     SPI_InitTypeDef SPI_InitStruct;
 8 
 9     SPI_RCC_Configuration();
10 
11     SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
12     SPI_InitStruct.SPI_Direction= SPI_Direction_2Lines_FullDuplex;
13     SPI_InitStruct.SPI_Mode = SPI_Mode_Master;
14     SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b;
15     SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low;
16     SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge;
17     SPI_InitStruct.SPI_NSS = SPI_NSS_Soft;
18     SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;
19     SPI_InitStruct.SPI_CRCPolynomial = 7;
20     SPI_Init(SPI1,&SPI_InitStruct);
21     
22     SPI_GPIO_Configuration();
23 
24     SPI_SSOutputCmd(SPI1, ENABLE);
25     SPI_Cmd(SPI1, ENABLE);
26 }

二、W5500初始化过程

注册SPI函数、初始化Socket Buffer、PHY状态检查、初始化Network等工作

 1 void wizchip_user_init(void)
 2 {
 3     uint8_t tmp;    
 4     uint8_t memsize[2][8] = {{2,2,2,2,2,2,2,2},{2,2,2,2,2,2,2,2}};    
 5         
 6     // First of all, Should register SPI callback functions implemented by user for accessing WIZCHIP 
 7     /* Critical section callback */
 8     reg_wizchip_cris_cbfunc(SPI_CrisEnter, SPI_CrisExit);    //注册临界区函数
 9     /* Chip selection call back */
10 #if   _WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_VDM_
11     reg_wizchip_cs_cbfunc(SPI_CS_Select, SPI_CS_Deselect);//注册SPI片选信号函数
12 #elif _WIZCHIP_IO_MODE_ == _WIZCHIP_IO_MODE_SPI_FDM_
13     reg_wizchip_cs_cbfunc(SPI_CS_Select, SPI_CS_Deselect);  // CS must be tried with LOW.
14 #else
15    #if (_WIZCHIP_IO_MODE_ & _WIZCHIP_IO_MODE_SIP_) != _WIZCHIP_IO_MODE_SIP_
16       #error "Unknown _WIZCHIP_IO_MODE_"
17    #else
18       reg_wizchip_cs_cbfunc(wizchip_select, wizchip_deselect);
19    #endif
20 #endif
21     /* SPI Read & Write callback function */
22     reg_wizchip_spi_cbfunc(SPI_ReadByte, SPI_WriteByte);    //注册读写函数
23 
24     /* WIZCHIP SOCKET Buffer initialize */
25     if(ctlwizchip(CW_INIT_WIZCHIP,(void*)memsize) == -1){
26          printf("WIZCHIP Initialized fail.\r\n");
27          while(1);
28     }
29 
30     /* PHY link status check */
31     do{
32          if(ctlwizchip(CW_GET_PHYLINK, (void*)&tmp) == -1){
33                 printf("Unknown PHY Link stauts.\r\n");
34          }
35     }while(tmp == PHY_LINK_OFF);
36 
37     /* Network initialization */
38     network_init();
39 }

网络初始化

 1 /**
 2   * @brief  Intialize the network information to be used in WIZCHIP
 3   * @retval None
 4   */
 5 void network_init(void)
 6 {
 7     uint8_t tmpstr[6];
 8     ctlnetwork(CN_SET_NETINFO, (void*)&gWIZNETINFO);
 9     ctlnetwork(CN_GET_NETINFO, (void*)&gWIZNETINFO);
10 
11     // Display Network Information
12     ctlwizchip(CW_GET_ID,(void*)tmpstr);
13     printf("\r\n=== %s NET CONF ===\r\n",(char*)tmpstr);
14     printf("MAC: %02X:%02X:%02X:%02X:%02X:%02X\r\n",gWIZNETINFO.mac[0],gWIZNETINFO.mac[1],gWIZNETINFO.mac[2],
15     gWIZNETINFO.mac[3],gWIZNETINFO.mac[4],gWIZNETINFO.mac[5]);
16     printf("SIP: %d.%d.%d.%d\r\n", gWIZNETINFO.ip[0],gWIZNETINFO.ip[1],gWIZNETINFO.ip[2],gWIZNETINFO.ip[3]);
17     printf("GAR: %d.%d.%d.%d\r\n", gWIZNETINFO.gw[0],gWIZNETINFO.gw[1],gWIZNETINFO.gw[2],gWIZNETINFO.gw[3]);
18     printf("SUB: %d.%d.%d.%d\r\n", gWIZNETINFO.sn[0],gWIZNETINFO.sn[1],gWIZNETINFO.sn[2],gWIZNETINFO.sn[3]);
19     printf("DNS: %d.%d.%d.%d\r\n", gWIZNETINFO.dns[0],gWIZNETINFO.dns[1],gWIZNETINFO.dns[2],gWIZNETINFO.dns[3]);
20     printf("======================\r\n");
21 }