stm32f769discovery 寄存器配置ETH，无操作系统移植lwip141

stary666 · 发表于 2018-4-2 14:55:20

本帖最后由 ky123 于 2018-4-2 17:59 编辑

一直以来都想搞个寄存器配置版本的ETH,最近时间充裕，花了近2周，昨天终于实现了以太网的连接，上图 TIM截图20180402175842.jpg

这是打印结果
下面详细说明一下
首先实现lan8742的驱动

/* Ethernet pins configuration ************************************************/
/*
RMII_REF_CLK ----------------------> PA1
RMII_MDIO -------------------------> PA2
RMII_MDC --------------------------> PC1
RMII_MII_CRS_DV -------------------> PA7
RMII_MII_RXD0 ---------------------> PC4
RMII_MII_RXD1 ---------------------> PC5
RMII_MII_RXER ---------------------> PG2/PD5
RMII_MII_TX_EN --------------------> PG11
RMII_MII_TXD0 ---------------------> PG13
RMII_MII_TXD1 ---------------------> PG14
*/
*(uint32_t *)0x40023830 |= 0x45; //使能PORTA\C\G时钟 0x4d,ACDG
*(uint32_t *)0x40023830 |= 0xf000000; //使能ETH,TX,RX,MAC时钟
GPIO_Set(GPIOA,PIN1|PIN2|PIN7,GPIO_MODE_AF,GPIO_OTYPE_PP,GPIO_SPEED_100M,GPIO_PUPD_NONE); //PB3,PB4设置
GPIO_AF_Set(GPIOA,1,11); //PA1,AF11
GPIO_AF_Set(GPIOA,2,11); //PA2,AF11
GPIO_AF_Set(GPIOA,7,11); //PA7,AF11
GPIO_Set(GPIOC,PIN1|PIN4|PIN5,GPIO_MODE_AF,GPIO_OTYPE_PP,GPIO_SPEED_100M,GPIO_PUPD_NONE); //PB3,PB4设置
GPIO_AF_Set(GPIOC,1,11); //PC1,AF11
GPIO_AF_Set(GPIOC,4,11); //PC4,AF11
GPIO_AF_Set(GPIOC,5,11); //PC5,AF11
GPIO_Set(GPIOD,PIN5,GPIO_MODE_AF,GPIO_OTYPE_PP,GPIO_SPEED_100M,GPIO_PUPD_NONE); //PB3,PB4设置
GPIO_AF_Set(GPIOD,5,11); //PD5,AF11
GPIO_Set(GPIOG,PIN2|PIN11|PIN13|PIN14,GPIO_MODE_AF,GPIO_OTYPE_PP,GPIO_SPEED_100M,GPIO_PUPD_NONE); //PB3,PB4设置
GPIO_AF_Set(GPIOG,2,11); //PG2,AF11
GPIO_AF_Set(GPIOG,11,11); //PG11,AF11
GPIO_AF_Set(GPIOG,13,11); //PG13,AF11
GPIO_AF_Set(GPIOG,14,11); //PG14,AF11
MY_NVIC_Init(0,0,ETH_IRQn,2); //配置ETH中的分组

[color=rgb(51, 102, 153) !important]复制代码
然后实现LAN8742寄存器的配置

*(uint32_t *)0x40023830 |= 0x400000;
RCC->AHB1RSTR |= 0x02000000;
/* Enable SYSCFG Clock */
*(uint32_t *)0x40023844 |= 0x4000;
SYSCFG->PMC &= ~(SYSCFG_PMC_MII_RMII_SEL);
SYSCFG->PMC |= 0x800000;//RMII
RCC->AHB1RSTR &= ~ 0x02000000;
ETH->DMABMR |= 0x1; //software reset
while (ETH->DMABMR & ETH_DMABMR_SR);
/* Write to ETHERNET MAC MIIAR: Configure the ETHERNET CSR Clock Range */
ETH->MACMIIAR = (uint32_t)(1<<4);
write_PHY(PHY_BCR, PHY_RESET);
/* 等待复位完成 */
for (tout = 0; tout < 0x10000; tout++)
{
read_PHY (PHY_BSR,®v);
if (!(regv & PHY_LINKED_STATUS))
{
/* 复位完成 */
printf("2. Reset Complete\r\n");
break;
}
}
write_PHY(PHY_BCR, PHY_AUTONEGOTIATION);
for (tout = 0; tout < 0x10000; tout++)
{
read_PHY (PHY_BSR,®v);
if (!(regv & PHY_AUTONEGO_COMPLETE))
{
/* 复位完成 */
printf("3. Auto-Negotiation Complete\r\n");
break;
}
}
for (tout = 0; tout < 0x1000; tout++);
read_PHY (PHY_SR,®v);
printf("%x\r\n",regv);
/* Configure the MAC with the Duplex Mode fixed by the auto-negotiation process */
if((regv & PHY_DUPLEX_STATUS) != (uint32_t)RESET)
{
/* Set Ethernet duplex mode to Full-duplex following the auto-negotiation */
printf("4. Full-duplex connection\r\n");
phyreg |= ETH_MODE_FULLDUPLEX;
}
else
{
/* Set Ethernet duplex mode to Half-duplex following the auto-negotiation */
printf("4. half-duplex connection\r\n");
phyreg |= ETH_MODE_HALFDUPLEX;
}
if((regv & PHY_SPEED_STATUS) != (uint32_t)RESET)
{
/* Set Ethernet duplex mode to Full-duplex following the auto-negotiation */
printf("5. 10Mbps Mode\r\n");
phyreg |= ETH_SPEED_10M;
}
else
{
/* Set Ethernet duplex mode to Half-duplex following the auto-negotiation */
printf("5. 100Mbps Mode\r\n");
phyreg |= ETH_SPEED_100M;
}
/* Config MAC and DMA */
ETH_MACDMAConfig(heth, phyreg);

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下面是实现读写的函数

void write_PHY (uint32_t PhyReg, uint16_t RegValue)
{
uint32_t tout;
uint32_t tmpreg = 0;
ETH->MACMIIDR = (uint16_t)RegValue;
/* Get the ETHERNET MACMIIAR value */
tmpreg = ETH->MACMIIAR;
/* Keep only the CSR Clock Range CR[2:0] bits value */
tmpreg &= ~ETH_MACMIIAR_CR_MASK;
/* Prepare the MII register address value */
tmpreg |=(((uint32_t)(LAN8742A_PHY_ADDRESS << 11)) & ETH_MACMIIAR_PA); /* Set the PHY device address */
tmpreg |=(((uint32_t)PhyReg<<6) & ETH_MACMIIAR_MR); /* Set the PHY register address */
tmpreg |= ETH_MACMIIAR_MW; /* Set the write mode */
tmpreg |= ETH_MACMIIAR_MB; /* Set the MII Busy bit */
/* Write the result value into the MII Address register */
ETH->MACMIIAR = tmpreg;
/* 等待操作完成，即等待MMAR_MB位被清零 */
tout = 0;
for (tout = 0; tout < MII_WR_TOUT; tout++)
{
if ((ETH->MACMIIAR & ETH_MACMIIAR_MB) == 0)
{
break;
}
}
}
void read_PHY (uint32_t PhyReg,uint32_t *RegValue)
{
uint32_t tout;
uint32_t tmpreg = 0;
tmpreg = ETH->MACMIIAR;
/* Keep only the CSR Clock Range CR[2:0] bits value */
tmpreg &= ~ETH_MACMIIAR_CR_MASK;
/* Prepare the MII address register value */
tmpreg |=(((uint32_t)(LAN8742A_PHY_ADDRESS << 11)) & ETH_MACMIIAR_PA); /* Set the PHY device address */
tmpreg |=(((uint32_t)PhyReg<<6) & ETH_MACMIIAR_MR); /* Set the PHY register address */
tmpreg &= ~ETH_MACMIIAR_MW; /* Set the read mode */
tmpreg |= ETH_MACMIIAR_MB; /* Set the MII Busy bit */
/* Write the result value into the MII Address register */
ETH->MACMIIAR = tmpreg;
/* 等待操作完成，即等待MMAR_MB位被清零 */
tout = 0;
for (tout = 0; tout < MII_RD_TOUT; tout++)
{
if ((ETH->MACMIIAR & ETH_MACMIIAR_MB) == 0)
{
break;
}
}
/* Get MACMIIDR value */
*RegValue = (uint16_t)(ETH->MACMIIDR);
/* 从 PHY 中读取16bit的数据值 */
}

[color=rgb(51, 102, 153) !important]复制代码
保存可以正常运行，并且连上lan8742芯片

下面开始移植lwp141，步骤就不说了，网上有

直接给出代码

static void low_level_init(struct netif *netif)
{
uint8_t macaddress[6]= { MAC_ADDR0, MAC_ADDR1, MAC_ADDR2, MAC_ADDR3, MAC_ADDR4, MAC_ADDR5 };
EthHandle.Instance = ETH;
EthHandle.Init.MACAddr = macaddress;
EthHandle.Init.AutoNegotiation = ETH_AUTONEGOTIATION_ENABLE;
EthHandle.Init.Speed = ETH_SPEED_100M;
EthHandle.Init.DuplexMode = ETH_MODE_FULLDUPLEX;
EthHandle.Init.MediaInterface = ETH_MEDIA_INTERFACE_RMII;
EthHandle.Init.RxMode = ETH_RXINTERRUPT_MODE;
EthHandle.Init.ChecksumMode = ETH_CHECKSUM_BY_HARDWARE;
EthHandle.Init.PhyAddress = LAN8742A_PHY_ADDRESS;
/* configure ethernet peripheral (GPIOs, clocks, MAC, DMA) */
lan8742_init(&EthHandle);
/* Initialize Tx Descriptors list: Chain Mode */
HAL_ETH_DMATxDescListInit(&EthHandle, DMATxDscrTab, &Tx_Buff[0][0], ETH_TXBUFNB);
/* Initialize Rx Descriptors list: Chain Mode */
HAL_ETH_DMARxDescListInit(&EthHandle, DMARxDscrTab, &Rx_Buff[0][0], ETH_RXBUFNB);
/* Set netif link flag */
netif->flags |= NETIF_FLAG_LINK_UP;
/* set netif MAC hardware address length */
netif->hwaddr_len = ETHARP_HWADDR_LEN;
/* set netif MAC hardware address */
netif->hwaddr[0] = MAC_ADDR0;
netif->hwaddr[1] = MAC_ADDR1;
netif->hwaddr[2] = MAC_ADDR2;
netif->hwaddr[3] = MAC_ADDR3;
netif->hwaddr[4] = MAC_ADDR4;
netif->hwaddr[5] = MAC_ADDR5;
/* set netif maximum transfer unit */
netif->mtu = 1500;
/* Accept broadcast address and ARP traffic */
netif->flags |= NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
}
err_t low_level_output(struct netif *netif, struct pbuf *p)
{
err_t errval;
struct pbuf *q;
uint8_t *buffer = (uint8_t *)(EthHandle.TxDesc->Buffer1Addr);
__IO ETH_DMADescTypeDef *DmaTxDesc;
uint32_t framelength = 0;
uint32_t bufferoffset = 0;
uint32_t byteslefttocopy = 0;
uint32_t payloadoffset = 0;
DmaTxDesc = EthHandle.TxDesc;
bufferoffset = 0;
/* copy frame from pbufs to driver buffers */
for(q = p; q != NULL; q = q->next)
{
/* Is this buffer available? If not, goto error */
if((DmaTxDesc->Status & ETH_DMATXDESC_OWN) != (uint32_t)RESET)
{
errval = ERR_USE;
goto error;
}
/* Get bytes in current lwIP buffer */
byteslefttocopy = q->len;
payloadoffset = 0;
/* Check if the length of data to copy is bigger than Tx buffer size*/
while( (byteslefttocopy + bufferoffset) > ETH_TX_BUF_SIZE )
{
/* Copy data to Tx buffer*/
memcpy( (uint8_t*)((uint8_t*)buffer + bufferoffset), (uint8_t*)((uint8_t*)q->payload + payloadoffset), (ETH_TX_BUF_SIZE - bufferoffset) );
/* Point to next descriptor */
DmaTxDesc = (ETH_DMADescTypeDef *)(DmaTxDesc->Buffer2NextDescAddr);
/* Check if the buffer is available */
if((DmaTxDesc->Status & ETH_DMATXDESC_OWN) != (uint32_t)RESET)
{
errval = ERR_USE;
goto error;
}
buffer = (uint8_t *)(DmaTxDesc->Buffer1Addr);
byteslefttocopy = byteslefttocopy - (ETH_TX_BUF_SIZE - bufferoffset);
payloadoffset = payloadoffset + (ETH_TX_BUF_SIZE - bufferoffset);
framelength = framelength + (ETH_TX_BUF_SIZE - bufferoffset);
bufferoffset = 0;
}
/* Copy the remaining bytes */
memcpy( (uint8_t*)((uint8_t*)buffer + bufferoffset), (uint8_t*)((uint8_t*)q->payload + payloadoffset), byteslefttocopy );
bufferoffset = bufferoffset + byteslefttocopy;
framelength = framelength + byteslefttocopy;
}
/* Clean and Invalidate data cache */
SCB_CleanInvalidateDCache ();
/* Prepare transmit descriptors to give to DMA */
HAL_ETH_TransmitFrame(&EthHandle, framelength);
errval = ERR_OK;
error:
/* When Transmit Underflow flag is set, clear it and issue a Transmit Poll Demand to resume transmission */
if ((EthHandle.Instance->DMASR & ETH_DMASR_TUS) != (uint32_t)RESET)
{
/* Clear TUS ETHERNET DMA flag */
EthHandle.Instance->DMASR = ETH_DMASR_TUS;
/* Resume DMA transmission*/
EthHandle.Instance->DMATPDR = 0;
}
return errval;
}
/**
* @brief Should allocate a pbuf and transfer the bytes of the incoming
* packet from the interface into the pbuf.
*
* @param netif the lwip network interface structure for this ethernetif
* @return a pbuf filled with the received packet (including MAC header)
* NULL on memory error
*/
struct pbuf * low_level_input(struct netif *netif)
{
struct pbuf *p = NULL, *q = NULL;
uint16_t len = 0;
uint8_t *buffer;
__IO ETH_DMADescTypeDef *dmarxdesc;
uint32_t bufferoffset = 0;
uint32_t payloadoffset = 0;
uint32_t byteslefttocopy = 0;
uint32_t i=0;
/* get received frame */
if(ETH_GetReceivedFrame(&EthHandle) != 0)
return NULL;
/* Obtain the size of the packet and put it into the "len" variable. */
len = EthHandle.RxFrameInfos.length;
buffer = (uint8_t *)EthHandle.RxFrameInfos.buffer;
if (len > 0)
{
/* We allocate a pbuf chain of pbufs from the Lwip buffer pool */
p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
printf("recv is ok\r\n");
}
/* Clean and Invalidate data cache */
SCB_CleanInvalidateDCache ();
if (p != NULL)
{
dmarxdesc = EthHandle.RxFrameInfos.FSRxDesc;
bufferoffset = 0;
for(q = p; q != NULL; q = q->next)
{
byteslefttocopy = q->len;
payloadoffset = 0;
/* Check if the length of bytes to copy in current pbuf is bigger than Rx buffer size */
while( (byteslefttocopy + bufferoffset) > ETH_RX_BUF_SIZE )
{
/* Copy data to pbuf */
memcpy( (uint8_t*)((uint8_t*)q->payload + payloadoffset), (uint8_t*)((uint8_t*)buffer + bufferoffset), (ETH_RX_BUF_SIZE - bufferoffset));
/* Point to next descriptor */
dmarxdesc = (ETH_DMADescTypeDef *)(dmarxdesc->Buffer2NextDescAddr);
buffer = (uint8_t *)(dmarxdesc->Buffer1Addr);
byteslefttocopy = byteslefttocopy - (ETH_RX_BUF_SIZE - bufferoffset);
payloadoffset = payloadoffset + (ETH_RX_BUF_SIZE - bufferoffset);
bufferoffset = 0;
}
/* Copy remaining data in pbuf */
memcpy( (uint8_t*)((uint8_t*)q->payload + payloadoffset), (uint8_t*)((uint8_t*)buffer + bufferoffset), byteslefttocopy);
bufferoffset = bufferoffset + byteslefttocopy;
}
}
/* Release descriptors to DMA */
/* Point to first descriptor */
dmarxdesc = EthHandle.RxFrameInfos.FSRxDesc;
/* Set Own bit in Rx descriptors: gives the buffers back to DMA */
for (i=0; i< EthHandle.RxFrameInfos.SegCount; i++)
{
dmarxdesc->Status |= ETH_DMARXDESC_OWN;
dmarxdesc = (ETH_DMADescTypeDef *)(dmarxdesc->Buffer2NextDescAddr);
}
/* Clear Segment_Count */
EthHandle.RxFrameInfos.SegCount =0;
/* When Rx Buffer unavailable flag is set: clear it and resume reception */
if ((EthHandle.Instance->DMASR & ETH_DMASR_RBUS) != (uint32_t)RESET)
{
/* Clear RBUS ETHERNET DMA flag */
EthHandle.Instance->DMASR = ETH_DMASR_RBUS;
/* Resume DMA reception */
EthHandle.Instance->DMARPDR = 0;
}
return p;
}
void ethernetif_input( void const * argument )
{
struct pbuf *p;
struct netif *netif = (struct netif *) argument;
p = low_level_input( netif );
if (p != NULL)
{
if (netif->input( p, netif) != ERR_OK )
{
LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
pbuf_free(p);
}
}
}
err_t ethernetif_init(struct netif *netif)
{
LWIP_ASSERT("netif != NULL", (netif != NULL));
#if LWIP_NETIF_HOSTNAME
/* Initialize interface hostname */
netif->hostname = "lwip";
#endif /* LWIP_NETIF_HOSTNAME */
netif->name[0] = IFNAME0;
netif->name[1] = IFNAME1;
/* We directly use etharp_output() here to save a function call.
* You can instead declare your own function an call etharp_output()
* from it if you have to do some checks before sending (e.g. if link
* is available...) */
netif->output = etharp_output;
netif->linkoutput = low_level_output;
/* initialize the hardware */
low_level_init(netif);
return ERR_OK;
}

[color=rgb(51, 102, 153) !important]复制代码
编译正常，然后开始网络的配置

static void Netif_Config(void)
{
ip_addr_t ipaddr;
ip_addr_t netmask;
ip_addr_t gw;
uint8_t iptab[4] = {0};
uint8_t iptxt[20];
uint8_t netmasktab[4]={0};
uint8_t netmasktxt[30];
uint8_t gwtab[4]={0};
uint8_t gwtxt[30];
mem_init(); //3?ê??ˉ?ˉì??ú′???
memp_init(); //3?ê??ˉ?ú′?3?
#ifdef USE_DHCP
ipaddr.addr = 0;
netmask.addr = 0;
gw.addr = 0;
#else
IP4_ADDR(&ipaddr,IP_ADDR0,IP_ADDR1,IP_ADDR2,IP_ADDR3);
IP4_ADDR(&netmask,NETMASK_ADDR0,NETMASK_ADDR1,NETMASK_ADDR2,NETMASK_ADDR3);
IP4_ADDR(&gw,GW_ADDR0,GW_ADDR1,GW_ADDR2,GW_ADDR3);
#endif /* USE_DHCP */
netif_add(&gnetif, &ipaddr, &netmask, &gw, NULL, eernetif_init, eernet_input);
/* Registers the default network interface. */
netif_set_default(&gnetif);
if (netif_is_link_up(&gnetif))
{
/* When the netif is fully configured this function must be called.*/
netif_set_up(&gnetif);
iptab[0] = IP_ADDR3;
iptab[1] = IP_ADDR2;
iptab[2] = IP_ADDR1;
iptab[3] = IP_ADDR0;
netmasktab[0]=NETMASK_ADDR3;
netmasktab[1]=NETMASK_ADDR2;
netmasktab[2]=NETMASK_ADDR1;
netmasktab[3]=NETMASK_ADDR0;
gwtab[0]=GW_ADDR3;
gwtab[1]=GW_ADDR2;
gwtab[2]=GW_ADDR1;
gwtab[3]=GW_ADDR0;
//
sprintf((char*)iptxt, " %d.%d.%d.%d", iptab[3], iptab[2], iptab[1], iptab[0]);
sprintf((char*)netmasktxt, "%d.%d.%d.%d",netmasktab[3],netmasktab[2],netmasktab[1],netmasktab[0]);
sprintf((char*)gwtxt,"%d.%d.%d.%d",gwtab[3],gwtab[2],gwtab[1],gwtab[0]);
//
printf("\r\n");
printf("\r\n");
printf(" Network Cable is connected \r\n");
printf(" This is lwip1.4.1-ping demo test \r\n");
printf(" The stm32f769 ip address is: %s\r\n",iptxt);
printf("The stm32f769 netmask address is: %s\r\n",netmasktxt);
printf(" The stm32f769 gw address is: %s\r\n",gwtxt);
printf("\r\n");
printf("\r\n");
printf("\r\n");
}
else
{
/* When the netif link is down this function must be called */
netif_set_down(&gnetif);
printf(" Network Cable is not connected \r\n");
}
}

[color=rgb(51, 102, 153) !important]复制代码
完成后，实现网络数据的处理

void LwIP_Pkt_Handle(void)
{
/* Read a received packet from the Ethernet buffers and send it to the lwIP for handling */
ethernetif_input(&gnetif);
}
void LwIP_Periodic_Handle(__IO uint32_t localtime)
{
#if LWIP_TCP
/* TCP periodic process every 250 ms */
if (localtime - TCPTimer >= TCP_TMR_INTERVAL)
{
TCPTimer = localtime;
tcp_tmr();
}
#endif
etharp_tmr();
}

[color=rgb(51, 102, 153) !important]复制代码
在main函数添加网路初始化，及数据处理

Netif_Config();
while(1)
{
if (ETH_GetReceivedFrame(&EthHandle)) //?ì2éê?·??óê?μ?êy?Y°ü
{
LwIP_Pkt_Handle(); //
}
/* handle periodic timers for LwIP */
LwIP_Periodic_Handle(LocalTime);
led_toggle();
delay_ms(5000);
}

[color=rgb(51, 102, 153) !important]复制代码

其他功能目前还在研究

[原创] stm32f769discovery 寄存器配置ETH，无操作系统移植lwip141

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