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[AT32F407]

LAN8720A 不能获取IP,求RT-Thread的驱动

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dongly|  楼主 | 2022-6-18 09:45 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
本帖最后由 dongly 于 2022-6-18 11:31 编辑

  • 问题: 在rt-thread 最新版下,加入LAN8720A的支持,不能获取IP,但2个网络指示灯亮,debug时,有收发数据
  • 硬件: AT32F407VGT7 + LAN7820A,RMII_RX[0..1]为PC4,PC5,LAN8720A 自带25MHz晶振
  • 用雅特力的例程可以工作,说明硬件没问题
  • 求指导,或移植好的驱动
  • drv_emac.h
    /*
    * Copyright (c) 2006-2021, RT-Thread Development Team
    *
    * SPDX-License-Identifier: Apache-2.0
    *
    * Change Logs:
    * Date           Author       Notes
    * 2022-05-16     shelton      first version
    */

    #ifndef __DRV_EMAC_H__
    #define __DRV_EMAC_H__

    #include "drv_common.h"
    #include <rtdevice.h>
    #include <rthw.h>
    #include <rtthread.h>

    /* the phy basic control register */
    #define PHY_BASIC_CONTROL_REG     0x00U
    #define PHY_RESET_MASK            (1 << 15)
    #define PHY_AUTO_NEGOTIATION_MASK (1 << 12)

    /* the phy basic status register */
    #define PHY_BASIC_STATUS_REG       0x01U
    #define PHY_LINKED_STATUS_MASK     (1 << 2)
    #define PHY_AUTONEGO_COMPLETE_MASK (1 << 5)

    /* the phy id one register */
    #define PHY_ID1_REG 0x02U
    /* the phy id two register */
    #define PHY_ID2_REG 0x03U
    /* the phy auto-negotiate advertise register */
    #define PHY_AUTONEG_ADVERTISE_REG 0x04U

    #if defined(PHY_USING_DM9162)
    #define PHY_CONTROL_REG      (0x00) /*!< basic mode control register */
    #define PHY_STATUS_REG       (0x01) /*!< basic mode status register */
    #define PHY_SPECIFIED_CS_REG (0x11) /*!< specified configuration and status register */
    /* phy control register */
    #define PHY_AUTO_NEGOTIATION_BIT (0x1000) /*!< enable auto negotiation */
    #define PHY_LOOPBACK_BIT         (0x4000) /*!< enable loopback */
    #define PHY_RESET_BIT            (0x8000) /*!< reset phy */
    /* phy status register */
    #define PHY_LINKED_STATUS_BIT (0x0004) /*!< link status */
    #define PHY_NEGO_COMPLETE_BIT (0x0020) /*!< auto negotiation complete */
    /* phy specified control/status register */
    #define PHY_FULL_DUPLEX_100MBPS_BIT (0x8000) /*!< full duplex 100 mbps */
    #define PHY_HALF_DUPLEX_100MBPS_BIT (0x4000) /*!< half duplex 100 mbps */
    #define PHY_FULL_DUPLEX_10MBPS_BIT  (0x2000) /*!< full duplex 10 mbps */
    #define PHY_HALF_DUPLEX_10MBPS_BIT  (0x1000) /*!< half duplex 10 mbps */
    #define PHY_DUPLEX_MODE                                                                            \
        (PHY_FULL_DUPLEX_100MBPS_BIT | PHY_FULL_DUPLEX_10MBPS_BIT) /*!< full duplex mode */
    #define PHY_SPEED_MODE (PHY_FULL_DUPLEX_10MBPS_BIT | PHY_HALF_DUPLEX_10MBPS_BIT) /*!< 10 mbps */
    /*  the phy interrupt source flag register. */
    #define PHY_INTERRUPT_FLAG_REG 0x15U
    /*  the phy interrupt mask register. */
    #define PHY_INTERRUPT_MASK_REG 0x15U
    #define PHY_LINK_CHANGE_FLAG   (1 << 2)
    #define PHY_LINK_CHANGE_MASK   (1 << 9)
    #define PHY_INT_MASK           0
    #elif defined(PHY_USING_DP83848)
    #define PHY_CONTROL_REG          (0x00)   /*!< basic mode control register */
    #define PHY_STATUS_REG           (0x01)   /*!< basic mode status register */
    #define PHY_SPECIFIED_CS_REG     (0x10)   /*!< phy status register */
    /* phy control register */
    #define PHY_AUTO_NEGOTIATION_BIT (0x1000) /*!< enable auto negotiation */
    #define PHY_LOOPBACK_BIT         (0x4000) /*!< enable loopback */
    #define PHY_RESET_BIT            (0x8000) /*!< reset phy */
    /* phy status register */
    #define PHY_LINKED_STATUS_BIT    (0x0004) /*!< link status */
    #define PHY_NEGO_COMPLETE_BIT    (0x0020) /*!< auto negotiation complete */

    #define PHY_DUPLEX_MODE        (0x0004) /*!< full duplex mode */
    #define PHY_SPEED_MODE         (0x0002) /*!< 10 mbps */

    /*  the phy interrupt source flag register. */
    #define PHY_INTERRUPT_FLAG_REG 0x12U
    #define PHY_LINK_CHANGE_FLAG   (1 << 13)
    /*  the phy interrupt control register. */
    #define PHY_INTERRUPT_CTRL_REG 0x11U
    #define PHY_INTERRUPT_EN       ((1 << 0) | (1 << 1))
    /*  the phy interrupt mask register. */
    #define PHY_INTERRUPT_MASK_REG 0x12U
    #define PHY_INT_MASK           (1 << 5)
    #elif defined(PHY_USING_LAN8720A)
    #define PHY_CONTROL_REG      (0x00) /*!< basic mode control register */
    #define PHY_STATUS_REG       (0x01) /*!< basic mode status register */
    #define PHY_SPECIFIED_CS_REG (0x1F) /*!< phy status register */
    /* phy control register */
    #define PHY_AUTO_NEGOTIATION_BIT (0x1000) /*!< enable auto negotiation */
    #define PHY_LOOPBACK_BIT         (0x4000) /*!< enable loopback */
    #define PHY_RESET_BIT            (0x8000) /*!< reset phy */
    /* phy status register */
    #define PHY_LINKED_STATUS_BIT    (0x0004) /*!< link status */
    #define PHY_NEGO_COMPLETE_BIT    (0x0020) /*!< auto negotiation complete */

    #define PHY_DUPLEX_MODE (0x0100) /*!< full duplex mode */
    #define PHY_SPEED_MODE  (0x2000) /*!< 100 mbps */

    #define PHY_FULL_DUPLEX_100MBPS_BIT (0x0018) /*!< full duplex 100 mbps */
    #define PHY_HALF_DUPLEX_100MBPS_BIT (0x0008) /*!< half duplex 100 mbps */
    #define PHY_FULL_DUPLEX_10MBPS_BIT  (0x0014) /*!< full duplex 10 mbps */
    #define PHY_HALF_DUPLEX_10MBPS_BIT  (0x0004) /*!< half duplex 10 mbps */
    #define PHY_DUPLEX_MBPS_MSK         (0x001C)
    /*  The PHY interrupt source flag register. */
    #define PHY_INTERRUPT_FLAG_REG      (0x01DU)
    #endif

    #endif /* __DRV_EMAC_H__ */

  • /*
    * Copyright (c) 2006-2021, RT-Thread Development Team
    *
    * SPDX-License-Identifier: Apache-2.0
    *
    * Change Logs:
    * Date           Author       Notes
    * 2022-05-16     shelton      first version
    */

    #include "drv_emac.h"
    #include <netif/ethernetif.h>
    #include <lwipopts.h>

    /* debug option */
    // #define EMAC_RX_DUMP
    // #define EMAC_TX_DUMP
    #define DRV_DEBUG
    #define LOG_TAG                         "drv.emac"
    #include <drv_log.h>

    /* emac memory buffer configuration */
    #define EMAC_NUM_RX_BUF                 4    /* 0x1800 for rx (4 * 1536 = 6k)      */
    #define EMAC_NUM_TX_BUF                 2    /* 0x0600 for tx (2 * 1536 = 3k)      */

    #define MAX_ADDR_LEN                    6

    struct rt_at32_emac
    {
        /* inherit from ethernet device */
        struct eth_device parent;
    #ifndef PHY_USING_INTERRUPT_MODE
        rt_timer_t poll_link_timer;
    #endif

        /* interface address info, hw address */
        rt_uint8_t dev_addr[MAX_ADDR_LEN];
        /* emac_speed */
        emac_speed_type emac_speed;
        /* emac_duplex_mode */
        emac_duplex_type emac_mode;
    };

    static emac_dma_desc_type *dma_rx_dscr_tab, *dma_tx_dscr_tab;
    extern emac_dma_desc_type *dma_rx_desc_to_get, *dma_tx_desc_to_set;

    static rt_uint8_t *rx_buff, *tx_buff;
    static struct rt_at32_emac at32_emac_device;
    static uint8_t phy_addr = 0xFF;
    static struct rt_semaphore tx_wait;
    static rt_bool_t tx_is_waiting = RT_FALSE;

    #if defined(EMAC_RX_DUMP) || defined(EMAC_TX_DUMP)
    #define __is_print(ch) ((unsigned int)((ch) - ' ') < 127u - ' ')
    static void dump_hex(const rt_uint8_t *ptr, rt_size_t buflen)
    {
        unsigned char *buf = (unsigned char *)ptr;
        int i, j;

        for (i = 0; i < buflen; i += 16)
        {
            rt_kprintf("%08X: ", i);

            for (j = 0; j < 16; j++)
                if (i + j < buflen)
                    rt_kprintf("%02X ", buf[i + j]);
                else
                    rt_kprintf("   ");
            rt_kprintf(" ");

            for (j = 0; j < 16; j++)
                if (i + j < buflen)
                    rt_kprintf("%c", __is_print(buf[i + j]) ? buf[i + j] : '.');
            rt_kprintf("\n");
        }
    }
    #endif

    // /**
    //   * [url=home.php?mod=space&uid=247401]@brief[/url] phy reset
    //   */
    // static void phy_reset(void)
    // {
    //     gpio_init_type gpio_init_struct;

    // #if defined (SOC_SERIES_AT32F437)
    //     crm_periph_clock_enable(CRM_GPIOE_PERIPH_CLOCK, TRUE);
    //     crm_periph_clock_enable(CRM_GPIOG_PERIPH_CLOCK, TRUE);

    //     gpio_default_para_init(&gpio_init_struct);
    //     gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
    //     gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
    //     gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
    //     gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
    //     gpio_init_struct.gpio_pins = GPIO_PINS_15;
    //     gpio_init(GPIOE, &gpio_init_struct);

    //     gpio_init_struct.gpio_pins = GPIO_PINS_15;
    //     gpio_init(GPIOG, &gpio_init_struct);

    //     gpio_bits_reset(GPIOE, GPIO_PINS_15);
    //     gpio_bits_reset(GPIOG, GPIO_PINS_15);
    //     rt_thread_mdelay(2);
    //     gpio_bits_set(GPIOE, GPIO_PINS_15);
    // #endif
    // #if defined (SOC_SERIES_AT32F407)
    //     crm_periph_clock_enable(CRM_GPIOC_PERIPH_CLOCK, TRUE);

    //     gpio_default_para_init(&gpio_init_struct);
    //     gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
    //     gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
    //     gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
    //     gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
    //     gpio_init_struct.gpio_pins = GPIO_PINS_8;
    //     gpio_init(GPIOC, &gpio_init_struct);

    //     gpio_bits_reset(GPIOC, GPIO_PINS_8);
    //     rt_thread_mdelay(2);
    //     gpio_bits_set(GPIOC, GPIO_PINS_8);
    // #endif
    //     rt_thread_mdelay(2000);
    // }


    /**
      * [url=home.php?mod=space&uid=247401]@brief[/url] reset phy register
      */
    static error_status emac_phy_register_reset(void)
    {
        uint16_t data = 0;
        uint32_t timeout = 0;
        uint32_t i = 0;

        if(emac_phy_register_write(phy_addr, PHY_CONTROL_REG, PHY_RESET_BIT) == ERROR)
        {
            return ERROR;
        }

        for(i = 0; i < 0x000FFFFF; i++);

        do
        {
            timeout++;
            if(emac_phy_register_read(phy_addr, PHY_CONTROL_REG, &data) == ERROR)
            {
                return ERROR;
            }
        } while((data & PHY_RESET_BIT) && (timeout < PHY_TIMEOUT));

        for(i = 0; i < 0x00FFFFF; i++);
        if(timeout == PHY_TIMEOUT)
        {
            return ERROR;
        }
        return SUCCESS;
    }

    /**
      * [url=home.php?mod=space&uid=247401]@brief[/url] set mac speed related parameters
      */
    static error_status emac_speed_config(emac_auto_negotiation_type nego, emac_duplex_type mode, emac_speed_type speed)
    {
        uint16_t data = 0;
        uint32_t timeout = 0;
        if(nego == EMAC_AUTO_NEGOTIATION_ON)
        {
            do
            {
                timeout++;
                if(emac_phy_register_read(phy_addr, PHY_STATUS_REG, &data) == ERROR)
                {
                  return ERROR;
                }
            } while(!(data & PHY_LINKED_STATUS_BIT) && (timeout < PHY_TIMEOUT));

            if(timeout == PHY_TIMEOUT)
            {
                return ERROR;
            }

            timeout = 0;

            if(emac_phy_register_write(phy_addr, PHY_CONTROL_REG, PHY_AUTO_NEGOTIATION_BIT) == ERROR)
            {
                return ERROR;
            }

            do
            {
                timeout++;
                if(emac_phy_register_read(phy_addr, PHY_STATUS_REG, &data) == ERROR)
                {
                    return ERROR;
                }
            } while(!(data & PHY_NEGO_COMPLETE_BIT) && (timeout < PHY_TIMEOUT));

            if(timeout == PHY_TIMEOUT)
            {
                return ERROR;
            }

            if(emac_phy_register_read(phy_addr, PHY_SPECIFIED_CS_REG, &data) == ERROR)
            {
                return ERROR;
            }
    #ifdef PHY_USING_DM9162
            if(data & PHY_FULL_DUPLEX_100MBPS_BIT)
            {
                emac_fast_speed_set(EMAC_SPEED_100MBPS);
                emac_duplex_mode_set(EMAC_FULL_DUPLEX);
            }
            else if(data & PHY_HALF_DUPLEX_100MBPS_BIT)
            {
                emac_fast_speed_set(EMAC_SPEED_100MBPS);
                emac_duplex_mode_set(EMAC_HALF_DUPLEX);
            }
            else if(data & PHY_FULL_DUPLEX_10MBPS_BIT)
            {
                emac_fast_speed_set(EMAC_SPEED_10MBPS);
                emac_duplex_mode_set(EMAC_FULL_DUPLEX);
            }
            else if(data & PHY_HALF_DUPLEX_10MBPS_BIT)
            {
                emac_fast_speed_set(EMAC_SPEED_10MBPS);
                emac_duplex_mode_set(EMAC_HALF_DUPLEX);
            }
    #endif
    #ifdef PHY_USING_DP83848
            if(data & PHY_DUPLEX_MODE)
            {
                emac_duplex_mode_set(EMAC_FULL_DUPLEX);
            }
            else
            {
                emac_duplex_mode_set(EMAC_HALF_DUPLEX);
            }
            if(data & PHY_SPEED_MODE)
            {
                emac_fast_speed_set(EMAC_SPEED_10MBPS);
            }
            else
            {
                emac_fast_speed_set(EMAC_SPEED_100MBPS);
            }
    #endif
    #ifdef PHY_USING_LAN8720A
            if ((data & PHY_DUPLEX_MBPS_MSK) == PHY_FULL_DUPLEX_100MBPS_BIT)
            {
                emac_duplex_mode_set(EMAC_FULL_DUPLEX);
                emac_fast_speed_set(EMAC_SPEED_100MBPS);
            }

            if ((data & PHY_DUPLEX_MBPS_MSK) == PHY_HALF_DUPLEX_100MBPS_BIT)
            {
                emac_duplex_mode_set(EMAC_HALF_DUPLEX);
                emac_fast_speed_set(EMAC_SPEED_100MBPS);
            }

            if ((data & PHY_DUPLEX_MBPS_MSK) == PHY_FULL_DUPLEX_10MBPS_BIT)
            {
                emac_duplex_mode_set(EMAC_FULL_DUPLEX);
                emac_fast_speed_set(EMAC_SPEED_100MBPS);
            }

            if ((data & PHY_DUPLEX_MBPS_MSK) == PHY_FULL_DUPLEX_10MBPS_BIT)
            {
                emac_duplex_mode_set(EMAC_HALF_DUPLEX);
                emac_fast_speed_set(EMAC_SPEED_100MBPS);
            }
    #endif
        }
        else
        {
            if(emac_phy_register_write(phy_addr, PHY_CONTROL_REG, (uint16_t)((mode << 8) | (speed << 13))) == ERROR)
            {
                return ERROR;
            }
            if(speed == EMAC_SPEED_100MBPS)
            {
                emac_fast_speed_set(EMAC_SPEED_100MBPS);
            }
            else
            {
                emac_fast_speed_set(EMAC_SPEED_10MBPS);
            }
            if(mode == EMAC_FULL_DUPLEX)
            {
                emac_duplex_mode_set(EMAC_FULL_DUPLEX);
            }
            else
            {
                emac_duplex_mode_set(EMAC_HALF_DUPLEX);
            }
        }

        return SUCCESS;
    }

    /**
      * [url=home.php?mod=space&uid=247401]@brief[/url] initialize emac phy
      */
    static error_status emac_phy_init(emac_control_config_type *control_para)
    {
        emac_clock_range_set();
        if(emac_phy_register_reset() == ERROR)
        {
            return ERROR;
        }
        if(emac_speed_config(control_para->auto_nego, control_para->duplex_mode, control_para->fast_ethernet_speed) == ERROR)
        {
            return ERROR;
        }

        emac_control_config(control_para);
        return SUCCESS;
    }

    /**
      * [url=home.php?mod=space&uid=247401]@brief[/url] emac initialization function
      */
    static rt_err_t rt_at32_emac_init(rt_device_t dev)
    {
        emac_control_config_type mac_control_para;
        emac_dma_config_type dma_control_para;

        /* check till phy detected */
        while(phy_addr == 0xFF)
        {
            rt_thread_mdelay(1000);
        }

        /* emac reset */
        emac_reset();

        /* software reset emac dma */
        emac_dma_software_reset_set();
        while(emac_dma_software_reset_get() == SET);

        emac_control_para_init(&mac_control_para);
        mac_control_para.auto_nego = EMAC_AUTO_NEGOTIATION_ON;
        if(emac_phy_init(&mac_control_para) == ERROR)
        {
            LOG_E("emac hardware init failed");
            return -RT_ERROR;
        }
        else
        {
            LOG_D("emac hardware init success");
        }

        emac_transmit_flow_control_enable(TRUE);
        emac_zero_quanta_pause_disable(TRUE);

        /* set mac address */
        emac_local_address_set(at32_emac_device.dev_addr);

        /* set emac dma rx link list */
        emac_dma_descriptor_list_address_set(EMAC_DMA_RECEIVE, dma_rx_dscr_tab, rx_buff, EMAC_NUM_RX_BUF);
        /* set emac dma tx link list */
        emac_dma_descriptor_list_address_set(EMAC_DMA_TRANSMIT, dma_tx_dscr_tab, tx_buff, EMAC_NUM_TX_BUF);

        /* emac interrupt init */
        emac_dma_config(&dma_control_para);
        emac_dma_interrupt_enable(EMAC_DMA_INTERRUPT_NORMAL_SUMMARY, TRUE);
        emac_dma_interrupt_enable(EMAC_DMA_INTERRUPT_RX, TRUE);
        nvic_irq_enable(EMAC_IRQn, 0x07, 0);

        /* enable emac */
        emac_start();

        return RT_EOK;
    }

    static rt_err_t rt_at32_emac_open(rt_device_t dev, rt_uint16_t oflag)
    {
        LOG_D("emac open");
        return RT_EOK;
    }

    static rt_err_t rt_at32_emac_close(rt_device_t dev)
    {
        LOG_D("emac close");
        return RT_EOK;
    }

    static rt_size_t rt_at32_emac_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
    {
        LOG_D("emac read");
        rt_set_errno(-RT_ENOSYS);
        return 0;
    }

    static rt_size_t rt_at32_emac_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
    {
        LOG_D("emac write");
        rt_set_errno(-RT_ENOSYS);
        return 0;
    }

    static rt_err_t rt_at32_emac_control(rt_device_t dev, int cmd, void *args)
    {
        switch (cmd)
        {
        case NIOCTL_GADDR:
            /* get mac address */
            if (args)
            {
                SMEMCPY(args, at32_emac_device.dev_addr, 6);
            }
            else
            {
                return -RT_ERROR;
            }
            break;

        default :
            break;
        }

        return RT_EOK;
    }

    /**
      * @brief transmit data
      */
    rt_err_t rt_at32_emac_tx(rt_device_t dev, struct pbuf *p)
    {
        struct pbuf *q;
        rt_uint32_t offset;

        while ((dma_tx_desc_to_set->status & EMAC_DMATXDESC_OWN) != RESET)
        {
            rt_err_t result;
            rt_uint32_t level;

            level = rt_hw_interrupt_disable();
            tx_is_waiting = RT_TRUE;
            rt_hw_interrupt_enable(level);

            /* it's own bit set, wait it */
            result = rt_sem_take(&tx_wait, RT_WAITING_FOREVER);
            if (result == RT_EOK) break;
            if (result == -RT_ERROR) return -RT_ERROR;
        }

        offset = 0;
        for (q = p; q != NULL; q = q->next)
        {
            uint8_t *buffer;

            /* copy the frame to be sent into memory pointed by the current ethernet dma tx descriptor */
            buffer = (uint8_t*)((dma_tx_desc_to_set->buf1addr) + offset);
            SMEMCPY(buffer, q->payload, q->len);
            offset += q->len;
        }

    #ifdef EMAC_TX_DUMP
        dump_hex(p->payload, p->tot_len);
    #endif
        /* prepare transmit descriptors to give to dma */
        LOG_D("transmit frame length :%d", p->tot_len);

        /* setting the frame length: bits[12:0] */
        dma_tx_desc_to_set->controlsize = (p->tot_len & EMAC_DMATXDESC_TBS1);
        /* Setting the last segment and first segment bits (in this case a frame is transmitted in one descriptor) */
        dma_tx_desc_to_set->status |= EMAC_DMATXDESC_LS | EMAC_DMATXDESC_FS;
        /* enable tx completion interrupt */
        dma_tx_desc_to_set->status |= EMAC_DMATXDESC_IC;
        /* set own bit of the tx descriptor status: gives the buffer back to ethernet dma */
        dma_tx_desc_to_set->status |= EMAC_DMATXDESC_OWN;

        /* When Tx Buffer unavailable flag is set: clear it and resume transmission */
        if(emac_dma_flag_get(EMAC_DMA_TBU_FLAG) != RESET)
        {
            emac_dma_flag_clear(EMAC_DMA_TBU_FLAG);
            emac_dma_poll_demand_set(EMAC_DMA_TRANSMIT, 0);
        }

        /* selects the next dma tx descriptor list for next buffer to send */
        dma_tx_desc_to_set = (emac_dma_desc_type*) (dma_tx_desc_to_set->buf2nextdescaddr);

        return ERR_OK;
    }

    /**
      * @brief receive data
      */
    struct pbuf *rt_at32_emac_rx(rt_device_t dev)
    {
        struct pbuf *p = NULL;
        struct pbuf *q = NULL;
        rt_uint32_t offset = 0;
        uint16_t len = 0;
        uint8_t *buffer;

        /* get received frame */
        len = emac_received_packet_size_get();
        if(len > 0)
        {
            LOG_D("receive frame len : %d", len);
            /* we allocate a pbuf chain of pbufs from the lwip buffer pool */
            p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);

            if(p != NULL)
            {
                for (q = p; q != RT_NULL; q= q->next)
                {
                    /* get rx buffer */
                    buffer = (uint8_t *)(dma_rx_desc_to_get->buf1addr);
    #ifdef EMAC_RX_DUMP
                    dump_hex(buffer, len);
    #endif
                    /* copy the received frame into buffer from memory pointed by the current ethernet dma rx descriptor */
                    SMEMCPY(q->payload, (buffer + offset), q->len);
                    offset += q->len;
                }
            }
        }
        else
        {
            return p;
        }

        /* release descriptors to dma */
        dma_rx_desc_to_get->status |= EMAC_DMARXDESC_OWN;

        /* when rx buffer unavailable flag is set: clear it and resume reception */
        if(emac_dma_flag_get(EMAC_DMA_RBU_FLAG) != RESET)
        {
            /* clear rbu ethernet dma flag */
            emac_dma_flag_clear(EMAC_DMA_RBU_FLAG);
            /* resume dma reception */
            emac_dma_poll_demand_set(EMAC_DMA_RECEIVE, 0);
        }

        /* update the ethernet dma global rx descriptor with next rx decriptor */
        /* chained mode */
        if((dma_rx_desc_to_get->controlsize & EMAC_DMARXDESC_RCH) != RESET)
        {
            /* selects the next dma rx descriptor list for next buffer to read */
            dma_rx_desc_to_get = (emac_dma_desc_type*) (dma_rx_desc_to_get->buf2nextdescaddr);
        }
        /* ring mode */
        else
        {
            if((dma_rx_desc_to_get->controlsize & EMAC_DMARXDESC_RER) != RESET)
            {
                /* selects the first dma rx descriptor for next buffer to read: last rx descriptor was used */
                dma_rx_desc_to_get = (emac_dma_desc_type*) (EMAC_DMA->rdladdr);
            }
            else
            {
                /* selects the next dma rx descriptor list for next buffer to read */
                dma_rx_desc_to_get = (emac_dma_desc_type*) ((uint32_t)dma_rx_desc_to_get + 0x10 + ((EMAC_DMA->bm & 0x0000007C) >> 2));
            }
        }
        return p;
    }

    void EMAC_IRQHandler(void)
    {
        /* enter interrupt */
        rt_interrupt_enter();

        /* clear received it */
        if(emac_dma_flag_get(EMAC_DMA_NIS_FLAG) != RESET)
        {
            emac_dma_flag_clear(EMAC_DMA_NIS_FLAG);
        }
        if(emac_dma_flag_get(EMAC_DMA_AIS_FLAG) != RESET)
        {
            emac_dma_flag_clear(EMAC_DMA_AIS_FLAG);
        }
        if(emac_dma_flag_get(EMAC_DMA_OVF_FLAG) != RESET)
        {
            emac_dma_flag_clear(EMAC_DMA_OVF_FLAG);
        }
        if(emac_dma_flag_get(EMAC_DMA_RBU_FLAG) != RESET)
        {
            emac_dma_flag_clear(EMAC_DMA_RBU_FLAG);
        }

        /* packet receiption */
        if (emac_dma_flag_get(EMAC_DMA_RI_FLAG) == SET)
        {
            /* a frame has been received */
            eth_device_ready(&(at32_emac_device.parent));
            emac_dma_flag_clear(EMAC_DMA_RI_FLAG);
        }

        /* packet transmission */
        if (emac_dma_flag_get(EMAC_DMA_TI_FLAG) == SET)
        {
            if (tx_is_waiting == RT_TRUE)
            {
                tx_is_waiting = RT_FALSE;
                rt_sem_release(&tx_wait);
            }

            emac_dma_flag_clear(EMAC_DMA_TI_FLAG);
        }

        /* leave interrupt */
        rt_interrupt_leave();
    }

    enum {
        PHY_LINK        = (1 << 0),
        PHY_10M         = (1 << 1),
        PHY_FULLDUPLEX  = (1 << 2),
    };

    static void phy_linkchange()
    {
        static rt_uint8_t phy_speed = 0;
        rt_uint8_t phy_speed_new = 0;
        rt_uint16_t status;

        emac_phy_register_read(phy_addr, PHY_BASIC_STATUS_REG, (uint16_t *)&status);
        LOG_D("phy basic status reg is 0x%X", status);

        if (status & (PHY_AUTONEGO_COMPLETE_MASK | PHY_LINKED_STATUS_MASK))
        {
            rt_uint16_t SR = 0;

            phy_speed_new |= PHY_LINK;

            emac_phy_register_read(phy_addr, PHY_SPECIFIED_CS_REG, (uint16_t *)&SR);
            LOG_D("phy control status reg is 0x%X", SR);

            if (SR & (PHY_SPEED_MODE))
            {
                phy_speed_new |= PHY_10M;
            }

            if (SR & (PHY_DUPLEX_MODE))
            {
                phy_speed_new |= PHY_FULLDUPLEX;
            }
        }

        if (phy_speed != phy_speed_new)
        {
            phy_speed = phy_speed_new;
            if (phy_speed & PHY_LINK)
            {
                LOG_D("link up");
                if (phy_speed & PHY_10M)
                {
                    LOG_D("10Mbps");
                    at32_emac_device.emac_speed = EMAC_SPEED_10MBPS;
                }
                else
                {
                    at32_emac_device.emac_speed = EMAC_SPEED_100MBPS;
                    LOG_D("100Mbps");
                }

                if (phy_speed & PHY_FULLDUPLEX)
                {
                    LOG_D("full-duplex");
                    at32_emac_device.emac_mode = EMAC_FULL_DUPLEX;
                }
                else
                {
                    LOG_D("half-duplex");
                    at32_emac_device.emac_mode = EMAC_HALF_DUPLEX;
                }

                /* send link up. */
                eth_device_linkchange(&at32_emac_device.parent, RT_TRUE);
            }
            else
            {
                LOG_I("link down");
                eth_device_linkchange(&at32_emac_device.parent, RT_FALSE);
            }
        }
    }

    #ifdef PHY_USING_INTERRUPT_MODE
    static void emac_phy_isr(void *args)
    {
        rt_uint32_t status = 0;

        emac_phy_register_read(phy_addr, PHY_INTERRUPT_FLAG_REG, (uint16_t *)&status);
        LOG_D("phy interrupt status reg is 0x%X", status);

        phy_linkchange();
    }
    #endif /* PHY_USING_INTERRUPT_MODE */

    static void phy_monitor_thread_entry(void *parameter)
    {
        uint8_t detected_count = 0;

        while(phy_addr == 0xFF)
        {
            /* phy search */
            rt_uint32_t i, temp;
            for (i = 0; i <= 0x1F; i++)
            {
                emac_phy_register_read(i, PHY_BASIC_STATUS_REG, (uint16_t *)&temp);

                if (temp != 0xFFFF && temp != 0x00)
                {
                    phy_addr = i;
                    break;
                }
            }

            detected_count++;
            rt_thread_mdelay(1000);

            if (detected_count > 10)
            {
                LOG_E("No PHY device was detected, please check hardware!");
            }
        }

        LOG_D("Found a phy, address:0x%02X", phy_addr);

        /* reset phy */
        LOG_D("RESET PHY!");
        emac_phy_register_write(phy_addr, PHY_BASIC_CONTROL_REG, PHY_RESET_MASK);
        rt_thread_mdelay(2000);
        emac_phy_register_write(phy_addr, PHY_BASIC_CONTROL_REG, PHY_AUTO_NEGOTIATION_MASK);

        phy_linkchange();
    #ifdef PHY_USING_INTERRUPT_MODE
        /* configuration intterrupt pin */
        rt_pin_mode(PHY_INT_PIN, PIN_MODE_INPUT_PULLUP);
        rt_pin_attach_irq(PHY_INT_PIN, PIN_IRQ_MODE_FALLING, emac_phy_isr, (void *)"callbackargs");
        rt_pin_irq_enable(PHY_INT_PIN, PIN_IRQ_ENABLE);

        /* enable phy interrupt */
        emac_phy_register_write(phy_addr, PHY_INTERRUPT_MASK_REG, PHY_INT_MASK);
    #if defined(PHY_INTERRUPT_CTRL_REG)
        emac_phy_register_write(phy_addr, PHY_INTERRUPT_CTRL_REG, PHY_INTERRUPT_EN);
    #endif
    #else /* PHY_USING_INTERRUPT_MODE */
        at32_emac_device.poll_link_timer = rt_timer_create("phylnk", (void (*)(void*))phy_linkchange,
                                            NULL, RT_TICK_PER_SECOND, RT_TIMER_FLAG_PERIODIC);
        if (!at32_emac_device.poll_link_timer || rt_timer_start(at32_emac_device.poll_link_timer) != RT_EOK)
        {
            LOG_E("Start link change detection timer failed");
        }
    #endif /* PHY_USING_INTERRUPT_MODE */
    }

    extern void phy_reset(void);

    /* Register the EMAC device */
    static int rt_hw_at32_emac_init(void)
    {
        rt_err_t state = RT_EOK;

        /* Prepare receive and send buffers */
        rx_buff = (rt_uint8_t *)rt_calloc(EMAC_NUM_RX_BUF, EMAC_MAX_PACKET_LENGTH);
        if (rx_buff == RT_NULL)
        {
            LOG_E("No memory");
            state = -RT_ENOMEM;
            goto __exit;
        }

        tx_buff = (rt_uint8_t *)rt_calloc(EMAC_NUM_TX_BUF, EMAC_MAX_PACKET_LENGTH);
        if (tx_buff == RT_NULL)
        {
            LOG_E("No memory");
            state = -RT_ENOMEM;
            goto __exit;
        }

        dma_rx_dscr_tab = (emac_dma_desc_type *)rt_calloc(EMAC_NUM_RX_BUF, sizeof(emac_dma_desc_type));
        if (dma_rx_dscr_tab == RT_NULL)
        {
            LOG_E("No memory");
            state = -RT_ENOMEM;
            goto __exit;
        }

        dma_tx_dscr_tab = (emac_dma_desc_type *)rt_calloc(EMAC_NUM_TX_BUF, sizeof(emac_dma_desc_type));
        if (dma_tx_dscr_tab == RT_NULL)
        {
            LOG_E("No memory");
            state = -RT_ENOMEM;
            goto __exit;
        }

        // /* phy clock */
        // phy_clock_config();

        /* enable periph clock */
        crm_periph_clock_enable(CRM_EMAC_PERIPH_CLOCK, TRUE);
        crm_periph_clock_enable(CRM_EMACTX_PERIPH_CLOCK, TRUE);
        crm_periph_clock_enable(CRM_EMACRX_PERIPH_CLOCK, TRUE);

        /* interface mode */
    #if defined (SOC_SERIES_AT32F407)
        gpio_pin_remap_config(MII_RMII_SEL_GMUX, TRUE);
    #endif
    #if defined (SOC_SERIES_AT32F437)
        scfg_emac_interface_set(SCFG_EMAC_SELECT_RMII);
    #endif

        /* emac gpio init */
        at32_msp_emac_init(NULL);

        at32_emac_device.emac_speed = EMAC_SPEED_100MBPS;
        at32_emac_device.emac_mode  = EMAC_FULL_DUPLEX;

        at32_emac_device.dev_addr[0] = 0x00;
        at32_emac_device.dev_addr[1] = 0x66;
        at32_emac_device.dev_addr[2] = 0x88;
        /* generate mac addr from unique id (only for test). */
        at32_emac_device.dev_addr[3] = *(rt_uint8_t *)(0x1FFFF7E8 + 4);
        at32_emac_device.dev_addr[4] = *(rt_uint8_t *)(0x1FFFF7E8 + 2);
        at32_emac_device.dev_addr[5] = *(rt_uint8_t *)(0x1FFFF7E8 + 0);

        at32_emac_device.parent.parent.init = rt_at32_emac_init;
        at32_emac_device.parent.parent.open = rt_at32_emac_open;
        at32_emac_device.parent.parent.close = rt_at32_emac_close;
        at32_emac_device.parent.parent.read = rt_at32_emac_read;
        at32_emac_device.parent.parent.write = rt_at32_emac_write;
        at32_emac_device.parent.parent.control = rt_at32_emac_control;
        at32_emac_device.parent.parent.user_data = RT_NULL;

        at32_emac_device.parent.eth_rx = rt_at32_emac_rx;
        at32_emac_device.parent.eth_tx = rt_at32_emac_tx;

        /* reset phy */
        phy_reset();
        rt_thread_mdelay(2000);

        /* start phy monitor */
        rt_thread_t tid;
        tid = rt_thread_create("phy",
                               phy_monitor_thread_entry,
                               RT_NULL,
                               1024,
                               RT_THREAD_PRIORITY_MAX - 2,
                               2);
        if (tid != RT_NULL)
        {
            rt_thread_startup(tid);
        }
        else
        {
            state = -RT_ERROR;
        }

        /* register eth device */
        state = eth_device_init(&(at32_emac_device.parent), "e0");
        if (RT_EOK == state)
        {
            LOG_D("emac device init success");
        }
        else
        {
            LOG_E("emac device init faild: %d", state);
            state = -RT_ERROR;
            goto __exit;
        }
    __exit:
        if (state != RT_EOK)
        {
            if (rx_buff)
            {
                rt_free(rx_buff);
            }

            if (tx_buff)
            {
                rt_free(tx_buff);
            }

            if (dma_rx_dscr_tab)
            {
                rt_free(dma_rx_dscr_tab);
            }

            if (dma_tx_dscr_tab)
            {
                rt_free(dma_tx_dscr_tab);
            }
        }

        return state;
    }

    INIT_DEVICE_EXPORT(rt_hw_at32_emac_init);


     

使用特权

评论回复
沙发
diaos| | 2023-3-29 13:28 | 只看该作者
雅特力的例程
我没有找到lan8720a 的例程,楼主方便提供下不

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板凳
muyichuan2012| | 2023-3-30 10:38 | 只看该作者
本帖最后由 muyichuan2012 于 2023-3-30 10:39 编辑

如附件,示例代码演示AT32F407/437 EMAC接不同PHY配置方法使用方法。如下型号PHY已打通

DM9162DP83848C
LAN8720A
AR8032
IP101GR
RTL8201F
YT8512
IP175LL
IP179N


SC0073_AT32F407_437_EMAC_Connected_with_Different_PHY_V2.0.3 (1).zip

9.01 MB

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评论
Dazzz 2024-7-9 11:22 回复TA
可以 
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