关于stm32f107vct6 使用Realtek8201CP 这个PHY的问题

nosignal 提问时间：2017-4-18 15:48 /

各位大神好，

   我现在在用stm32f107vct6这款芯片，PHY使用的是Realtek8201CP，MII模式。现在GPIO都已经初始化好了，上电后link灯亮了
   但是网络不通，之前开发板用的是DP83848YB这个PHY，而且使用的是RMII模式，现在自己的硬件电路换了个PHY，也更换成
   MII模式，在网上看了一些资料，说是需要更改三个寄存器：
//////
修改三个寄存器
/** @defgroup PHY_status_register
  * @{
  */
/* The PHY status register value change from a PHY to another so the user have
to update this value depending on the used external PHY */
/**
  * @brief  For LAN8700
  */
//#define PHY_SR                         31       /*!< Tranceiver Status Register */
/**
  * @brief  For DP83848
  */
//#define PHY_SR                         16    /*!< Tranceiver Status Register */
/**
  * @brief  For DM9161
  */
#define PHY_SR                         17    /*!< Tranceiver Status Register */
/* The Speed and Duplex mask values change from a PHY to another so the user have to update
this value depending on the used external PHY */
/**
  * @brief  For LAN8700
  */
//#define PHY_Speed_Status          ((u16)0x0004)    /*!< Configured information of Speed: 10Mbps */
//#define PHY_Duplex_Status          ((u16)0x0010)    /*!< Configured information of Duplex: Full-duplex */
/**
  * @brief  For DP83848
  */
//#define PHY_Speed_Status          ((u16)0x0002) /*!< Configured information of Speed: 10Mbps */
//#define PHY_Duplex_Status          ((u16)0x0004) /*!< Configured information of Duplex: Full-duplex */

/**
  * @brief  For DM9161
  */
#define PHY_Speed_Status          ((u16)0x3000) /*!< Configured information of Speed: 10Mbps */
#define PHY_Duplex_Status          ((u16)0xA000) /*!< Configured information of Duplex: Full-duplex */

还有就是根据自己板子的硬件连接确定 PHY_ADDRESS，由RX0－RX3和CSR这几个脚组成PHYADDR0－4
芯片复位时，会锁存这5个脚的电平，作为芯片地址，以后就找这个作访问了。
所以，如果你是悬空的话，认为是0，一定要接1才认为是1我的是悬空的，都是00
//#define DP83848_PHY       /* Ethernet pins mapped on STM3210C-EVAL Board */
#define PHY_ADDRESS    0x00 /* Relative to STM3210C-EVAL Board */
改完上面几个地方就可以使用了
////

  上边内容是在网上看得资料，但是看了一下Realtek的资料，感觉自己没找到信息。

PHY_ADDRESS  意思是RX0-RX3和CSR这几个引脚不悬空就为0吗？


PHY_SR                         17    /*!< Tranceiver Status Register */
这个寄存器没有找到呢？

#define PHY_Speed_Status          ((u16)0x3000) /*!< Configured information of Speed: 10Mbps */
#define PHY_Duplex_Status          ((u16)0xA000) /*!< Configured information of Duplex: Full-duplex */
这两个寄存器是配置寄存器吗？

求指导。。。

赞收藏 3 评论2 发布时间：2017-4-18 15:48

2个回答

nosignal 回答时间：2017-4-18 15:50:59

这是我GPIO的初始

void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure; //库文件，内初始化GPIO用到的结构体

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO , ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE);

  /* ETHERNET pins configuration */
  /* AF Output Push Pull:
  - ETH_MII_MDIO : PA2
  - ETH_MII_MDC : PC1
  - ETH_MII_TXD2: PC2
  - ETH_MII_TX_EN : PB11
  - ETH_MII_TXD0 : PB12
  - ETH_MII_TXD1: PB13
  - ETH_MII_PPS_OUT: PB5                                                                                              //PB5?aSPI1_MOSI
  - ETH_MII_TXD3: PB8 */

  /* Configure PA2 as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure PC1, PC2 and PC3 as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure PB5, PB8, PB11, PB12 and PB13 as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_11 |                               //PB5aSPI1_MOSI
                              GPIO_Pin_12 | GPIO_Pin_13;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /**************************************************************/
  /*             For Remapped Ethernet pins                */
  /*************************************************************/
  /* Input (Reset Value):
  - ETH_MII_CRS CRS: PA0
  - ETH_MII_RX_CLK / ETH_RMII_REF_CLK: PA1
  //- ETH_MII_COL: PA3
  - ETH_MII_RX_DV / ETH_RMII_CRS_DV: PD8                                                                                              //RX_DV

A7DT?? 2?ê???ó3é?
- ETH_MII_TX_CLK: PC3
- ETH_MII_RXD0 / ETH_RMII_RXD0: PD9 //RXD0

C4
- ETH_MII_RXD1 / ETH_RMII_RXD1: PD10 //RXD1

C5
- ETH_MII_RXD2: PD11 //RXD2

B0
- ETH_MII_RXD3: PD12 //RXD3

B1
  - ETH_MII_RX_ER: PB10 */

  /* ETHERNET pins remapp in STM3210C-EVAL board: RX_DV and RxD[3:0] */
  GPIO_PinRemapConfig(GPIO_Remap_ETH, ENABLE);

  /* Configure PA0, PA1 ￡?PA3 and PA7 as input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_7;//GPIO_Pin_3
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  /* Configure PB0, PB1 and PB10 as input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  /* Configure PC3, PC4 and PC5 as input */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* ADC Channel14 config --------------------------------------------------------*/
  /* Relative to STM3210D-EVAL Board */
  /* Configure PC.04 (ADC Channel14) as analog input -------------------------*/
  /*GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOC, &GPIO_InitStructure);*/

  /* MCO pin configuration------------------------------------------------- */
  /* Configure MCO (PA8) as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

/*-------------------------------------------------*/
/*函数名：以太网配置                            */
/*参  数：无                                     */
/*返回值：无                                     */
/*-------------------------------------------------*/
void Ethernet_Configuration(void)
{
ETH_InitTypeDef ETH_InitStructure;  //库文件，初始化以太网用到的结构体

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ETH_MAC | RCC_AHBPeriph_ETH_MAC_Tx | RCC_AHBPeriph_ETH_MAC_Rx, ENABLE);

//GPIO_ETH_MediaInterfaceConfig(GPIO_ETH_MediaInterface_RMII);//该函数设置以太网接口为RMII
GPIO_ETH_MediaInterfaceConfig(GPIO_ETH_MediaInterface_MII);//该函数设置以太网接口为MII

//程序思路利用PLL3时钟为MCO提供RMII需要的50M时钟
//系统初始化STM32主时钟为72M的时候，PLL3被设置为了外部25M晶振5分频 25/5=5M
RCC_PLL3Config(RCC_PLL3Mul_10);//PLL3倍频10倍 5*10=50M

RCC_PLL3Cmd(ENABLE);//使能PLL3时钟

while (RCC_GetFlagStatus(RCC_FLAG_PLL3RDY) == RESET)//等待PLL3使能成功
{}

RCC_MCOConfig(RCC_MCO_PLL3CLK);//选择MCO的时钟源为PLL3

ETH_DeInit();    //复位以太网外设寄存器到默认值，先使能，在禁止，已恢复默认值

ETH_SoftwareReset();//软件复位，通过设置ETH->DMABMR寄存器的位0实现

while (ETH_GetSoftwareResetStatus() == SET);//等待软复位成功

ETH_StructInit(&ETH_InitStructure);//初始化结构体ETH_InitStructure各个成员为默认值

//ETH_InitStructure结构体内成员较多，填充外默认值后，修改一些关键成员，以适应当前的需要
ETH_InitStructure.ETH_AutoNegotiation = ETH_AutoNegotiation_Enable;    //开启网络自适应功能
ETH_InitStructure.ETH_LoopbackMode = ETH_LoopbackMode_Disable; //关闭反馈
ETH_InitStructure.ETH_RetryTransmission = ETH_RetryTransmission_Disable; //关闭重传功能
ETH_InitStructure.ETH_AutomaticPadCRCStrip = ETH_AutomaticPadCRCStrip_Disable; //关闭自动去除PDA/CRC功能
ETH_InitStructure.ETH_ReceiveAll = ETH_ReceiveAll_Disable; //关闭接收所有的帧
ETH_InitStructure.ETH_BroadcastFramesReception = ETH_BroadcastFramesReception_Enable;//允许接收所有广播帧
ETH_InitStructure.ETH_PromiscuousMode = ETH_PromiscuousMode_Disable; //关闭混合模式的地址过滤
ETH_InitStructure.ETH_MulticastFramesFilter = ETH_MulticastFramesFilter_Perfect;//对于组播地址使用完美地址过滤
ETH_InitStructure.ETH_UnicastFramesFilter = ETH_UnicastFramesFilter_Perfect; //对单播地址使用完美地址过滤

#if  !CHECKSUM_GEN_ICMP //判断是否开启硬件校验,关闭软件校验
ETH_InitStructure.ETH_ChecksumOffload = ETH_ChecksumOffload_Enable; //开启ipv4和TCP/UDP/ICMP的帧校验和卸载
#endif

//当我们使用帧校验和卸载功能的时候，一定要使能存储转发模式,存储转发模式中要保证整个帧存储在FIFO中,
//这样MAC能插入/识别出帧校验值,当真校验正确的时候DMA就可以处理帧,否则就丢弃掉该帧
ETH_InitStructure.ETH_DropTCPIPChecksumErrorFrame = ETH_DropTCPIPChecksumErrorFrame_Enable; //开启丢弃TCP/IP错误帧
ETH_InitStructure.ETH_ReceiveStoreForward = ETH_ReceiveStoreForward_Enable;    //开启接收数据的存储转发模式
ETH_InitStructure.ETH_TransmitStoreForward = ETH_TransmitStoreForward_Enable; //开启发送数据的存储转发模式

ETH_InitStructure.ETH_ForwardErrorFrames = ETH_ForwardErrorFrames_Disable;      //禁止转发错误帧
ETH_InitStructure.ETH_ForwardUndersizedGoodFrames = ETH_ForwardUndersizedGoodFrames_Disable; //不转发过小的好帧
ETH_InitStructure.ETH_SecondFrameOperate = ETH_SecondFrameOperate_Enable;    //打开处理第二帧功能
ETH_InitStructure.ETH_AddressAlignedBeats = ETH_AddressAlignedBeats_Enable;    //开启DMA传输的地址对齐功能
ETH_InitStructure.ETH_FixedBurst = ETH_FixedBurst_Enable;             //开启固定突发功能
ETH_InitStructure.ETH_RxDMABurstLength = ETH_RxDMABurstLength_32Beat;      //DMA发送的最大突发长度为32个节拍
ETH_InitStructure.ETH_TxDMABurstLength = ETH_TxDMABurstLength_32Beat; //DMA接收的最大突发长度为32个节拍
ETH_InitStructure.ETH_DMAArbitration = ETH_DMAArbitration_RoundRobin_RxTx_2_1;
ETH_Init(&ETH_InitStructure,PHY_ADDRESS);          //配置ETH

ETH_DMAITConfig(ETH_DMA_IT_NIS|ETH_DMA_IT_R,ENABLE);    //使能以太网接收中断
}

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