stm32f107 Ethernet + rl-tcpnet

Copyright: Chengdu Heng Yuan Internet of Things Technology Co., Ltd.

Website: www.heryit.cn

Tel: 028-87657875 13060063607

Introduce the configuration of stm32f107 Ethernet and porting rl-tcpnet protocol stack, the official routine is LWIP, here is how to use rl-tcpnet. (need to include STM32_ETH.C and STM32_ETH.H)

Here is the descriptor definition, what is the descriptor please see the STM32 Chinese Reference Manual Ethernet Chapter

/* 描述符数量和缓存大小定义 */#define NUM_RX_BUF          4      //接收描述符数量和缓存数量#define NUM_TX_BUF          2      //发送描述符数量和缓存数量#define ETH_BUF_SIZE        1536   //每个缓存大小/* 接收描述符和发送描述符结构体类型定义（含义请参考STM32中文参考手册） */typedef struct {  U32 volatile Stat;  U32 Ctrl;  U32 Addr;  U32 Next;} RX_Desc;typedef struct {  U32 volatile CtrlStat;  U32 Size;  U32 Addr;  U32 Next;} TX_Desc;/* 当前使用的描述符序号 */static U8 TxBufIndex;static U8 RxBufIndex;/* DMA描述符声明 */static RX_Desc Rx_Desc[NUM_RX_BUF];static TX_Desc Tx_Desc[NUM_TX_BUF];/* 描述符所指向的内存 */static U32 rx_buf[NUM_RX_BUF][ETH_BUF_SIZE>>2];static U32 tx_buf[NUM_TX_BUF][ETH_BUF_SIZE>>2];

To use the Rl-tcpnet protocol stack, you need to provide an interface function for rl-tcpnet: void init_ethernet (void);     void Send_frame (Os_frame *frame);     void Int_enable_eth (void); void Int_disable_eth (void); The following are the corresponding functions:

Ethernet Hardware initialization (interface provided to rl-tcpnet) void init_ethernet (void) {nvic_inittypedef nvic_initstructure;    Gpio_inittypedef gpio_initstructure;    Eth_inittypedef eth_initstructure;    #define Time_out 0x0003fffful uint32_t time = 0; /* Enable clock */Rcc_ahbperiphclockcmd (Rcc_ahbperiph_eth_mac |                          Rcc_ahbperiph_eth_mac_tx |    RCC_AHBPERIPH_ETH_MAC_RX, ENABLE); /* Enable GPIO clock */rcc_apb2periphclockcmd (Rcc_apb2periph_gpioa | Rcc_apb2periph_gpiob |                           RCC_APB2PERIPH_GPIOC | Rcc_apb2periph_gpiod | Rcc_apb2periph_gpioe |    Rcc_apb2periph_afio, ENABLE);    /* Select interrupt vector table */nvic_setvectortable (Nvic_vecttab_flash, 0x0);     Nvic_prioritygroupconfig (nvic_prioritygroup_2);    /* Enable Ethernet Global Interrupt */Nvic_initstructure.nvic_irqchannel = ETH_IRQN;    Nvic_initstructure.nvic_irqchannelpreemptionpriority = 2;    nvic_initstructure.nvic_irqchannelsubpriority = 0;    Nvic_initstructure.nvic_irqchannelcmd = ENABLE; Nvic_init (&nvic_Initstructure); /* Ethernet PIN configuration currently using the RMII interface, no remapping required to use the Mii interface please modify */* AF Output Push Pull by yourself:-eth_rmii_mdio:pa2-eth_rmi  I_MDC:PC1-ETH_RMII_TX_EN:PB11-ETH_RMII_TXD0:PB12-ETH_RMII_TXD1:PB13 */* 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 as alternate function push-pull */gpio_initstructure.gpio_pin = gpio_pin_1;    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_11 | 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); /* Input:-ETH_RMII_REF_CLK:PA1-ETH_RMII_CRS_DV:PA7-ETH_RMII_RXD0:PC4-ETH_RMII_RXD1:PC5 */* Con Figure PA1 and PA7 as input */Gpio_initstructure.gpio_pin = gpio_pin_1 |    gpio_pin_7;    Gpio_initstructure.gpio_speed = Gpio_speed_50mhz;    Gpio_initstructure.gpio_mode = gpio_mode_in_floating;    Gpio_init (Gpioa, &gpio_initstructure); /* Configure PC4 and PC5 as input */Gpio_initstructure.gpio_pin = 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);    /* Select configured as Mii or RMII, currently rmii*/gpio_eth_mediainterfaceconfig (GPIO_ETH_MEDIAINTERFACE_RMII);    /* Reset Ethernet */Eth_deinit ();    Eth_softwarereset ();    /* Wait for the reset to complete */while (eth_getsoftwareresetstatus () = = SET);    /* Ethernet configuration, populate the eth_initstructure structure, and finally call Eth_init () to configure Ethernet */Eth_structinit (&eth_initstructure); /*------------------------MAC-----------------------------------*/eth_initstructure.eth_autonegotiation = eth_autonegotiation_enable    ;    Eth_initstructure.eth_loopbackmode = eth_loopbackmode_disable;    Eth_initstructure.eth_retrytransmission = eth_retrytransmission_disable;    Eth_initstructure.eth_automaticpadcrcstrip = eth_automaticpadcrcstrip_disable;    Eth_initstructure.eth_receiveall = eth_receiveall_disable;    Eth_initstructure.eth_broadcastframesreception = eth_broadcastframesreception_enable;    Eth_initstructure.eth_promiscuousmode = eth_promiscuousmode_disable;    Eth_initstructure.eth_multicastframesfilter = Eth_multicastframesfilter_perfect;    Eth_initstructure.eth_unicastframesfilter = Eth_unicastframesfilter_perfect;    #ifdef Checksum_by_hardware eth_initstructure.eth_checksumoffload = eth_checksumoffload_enable; #endif/*------------------------DMA-----------------------------------*/Eth_initstructure.eth_droptcpipche Cksumerrorframe = Eth_droptcpipchecksumerrorframe_enable;             Eth_initstructure.eth_receivestoreforward = eth_receivestoreforward_enable;         Eth_initstructure.eth_transmitstoreforward = eth_transmitstoreforward_enable;           Eth_initstructure.eth_forwarderrorframes = eth_forwarderrorframes_disable;       Eth_initstructure.eth_forwardundersizedgoodframes = eth_forwardundersizedgoodframes_disable;                                                              Eth_initstructure.eth_secondframeoperate = eth_secondframeoperate_enable;          Eth_initstructure.eth_addressalignedbeats = eth_addressalignedbeats_enable;                    Eth_initstructure.eth_fixedburst = eth_fixedburst_enable;              Eth_initstructure.eth_rxdmaburstlength = Eth_rxdmaburstlength_32beat;                                                                     Eth_initstructure.eth_txdmaburstlength = Eth_txdmaburstlength_32beat;    Eth_initstructure.eth_dmaarbitration = Eth_dmaarbitration_roundrobin_rxtx_2_1; /* Initialize Ethernet, the second parameter is phY chip Address */Eth_init (&eth_initstructure, lan9303_vphy_addr);    Receive descriptor initialization rx_descr_init ();    Send descriptor initialization tx_descr_init (); /* Enable normal total interrupt and receive interrupt */Eth_dmaitconfig (Eth_dma_it_nis |    Eth_dma_it_r, ENABLE); Enable to send and receive ETH-&GT;DMAOMR |= Domr_st |    DOMR_SR; ETH-&GT;MACCR |= Mcr_re |    Mcr_te; Configure the MAC address, otherwise you can only receive broadcast data Eth_macaddressconfig (ETH_MAC_ADDRESS0, Own_hw_adr);} Enable and disable Ethernet interrupts void Int_enable_eth (void) {/* Ethernet Interrupt Enable function. */nvic->iser[1] = 1 << 29; }void Int_disable_eth (void) {/* Ethernet Interrupt Disable function. */nvic->icer[1] = 1 << 29;}    Send a frame of data (interface function provided to rl-tcpnet) void Send_frame (Os_frame *frame) {U32 *sp,*dp;    U32 i,j;    j = Txbufindex; /* Wait until the data is sent */while (Tx_desc[j].    Ctrlstat & Dma_tx_own);    SP =** (U32 *) &frame->data[0]; DP = (U32 *) tx_desc[j].    ADDR;    /* Copy the data that needs to be sent to the memory specified by the Send descriptor */for (i = (frame->length + 3) >> 2; i; i--) {*dp++ = *sp++;  }//Send data volume  TX_DESC[J].    Size = frame->length; Modify send descriptor belongs to DMA Tx_desc[j].    Ctrlstat |= Dma_tx_own; /* Write data to DMATPDR to begin DMA Transfer */if ((Eth->dmasr |        Dsr_tbus)!*= 0) {Eth->dmasr = Dsr_tbus;    ETH-&GT;DMATPDR = 0;    } if (++j = = num_tx_buf) j = 0; Txbufindex = j;}

The above is the interface function that needs to be provided to rl-tcpnet.

Interrupt Service function for receiving Ethernet data.

Ethernet Interrupt Service function (for receiving Ethernet data) void Eth_irqhandler (void) {/* Ethernet Controller Interrupt function. */Os_frame *frame;    U32 I,rxlen;    U32 *SP,*DP;    i = Rxbufindex; do {/* Valid frame has been received. */* if (Rx_desc[i].        Stat & Dma_rx_error_mask) {goto rel; } if ((Rx_desc[i].        Stat & dma_rx_seg_mask)! = dma_rx_seg_mask) {goto rel; } Rxlen = ((rx_desc[i).        Stat >>) & 0X3FFF)-4;        if (Rxlen > Eth_mtu) {/* Packet too big, ignore it and free buffer. */goto rel; }/* Flag 0x80000000 to skip Sys_error () call when out of memory.        */frame = Alloc_mem (Rxlen | 0x80000000); /* if ' alloc_mem () ' have failed, ignore this packet. */if (frame! = NULL) {SP = (U32 *) (Rx_desc[i].            Addr &);            DP = (U32 *) &frame->data[0]; for (Rxlen = (Rxlen + 3) >> 2; Rxlen; rxlen--) {*dp++ = *sp++;        } put_in_queue (frame); }/* Release this frame from ETH IO buffer. */rel:rx_desc[i].        Stat = Dma_rx_own;    if (++i = = num_rx_buf) i = 0; } while ((Rx_desc[i].    Stat & dma_rx_own) = = 0);    Rxbufindex = i; if (Eth->dmasr & Int_rbuie) {/* Rx DMA suspended, resume DMA reception. */Eth->dmasr = Int_rbu        IE;    ETH->DMARPDR = 0; }/* Clear the Interrupt pending bits. */Eth->dmasr = Int_nise | Int_rie;}

Receive descriptor Initialization

//接收描述符初始化static void rx_descr_init (void) {    /* Initialize Receive DMA Descriptor array. */    U32 i,next;    RxBufIndex = 0;    for (i = 0, next = 0; i < NUM_RX_BUF; i++) {        if (++next == NUM_RX_BUF) next = 0;        Rx_Desc[i].Stat = DMA_RX_OWN;        Rx_Desc[i].Ctrl = DMA_RX_RCH | ETH_BUF_SIZE;        Rx_Desc[i].Addr = (U32)&rx_buf[i];        Rx_Desc[i].Next = (U32)&Rx_Desc[next];    }    //指向第一个描述符    ETH->DMARDLAR = (U32)&Rx_Desc[0];}

Send Descriptor initialization

//发送描述符初始化static void tx_descr_init (void) {    /* Initialize Transmit DMA Descriptor array. */    U32 i,next;    TxBufIndex = 0;    for (i = 0, next = 0; i < NUM_TX_BUF; i++) {        if (++next == NUM_TX_BUF) next = 0;        Tx_Desc[i].CtrlStat = DMA_TX_TCH | DMA_TX_LS | DMA_TX_FS;        Tx_Desc[i].Addr     = (U32)&tx_buf[i];        Tx_Desc[i].Next     = (U32)&Tx_Desc[next];    }    //指向第一个描述符    ETH->DMATDLAR = (U32)&Tx_Desc[0];}

To do this, add the Rl-tcpnet library and configuration file to the project to use Rl-tcpnet, and refer to the Rl-arm Help documentation for use.

stm32f107 Ethernet + rl-tcpnet