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int ch57x_eth_init(const uint8_t *macaddr)
{
    uint8_t tmp;
    // 配置安全寄存器进入安全模式，打开以太网络的时钟和电源；
    // 最好能关中断，因为只有16个周期有效果
    R8_SAFE_ACCESS_SIG = 0x57;
    R8_SAFE_ACCESS_SIG = 0xA8;
    R8_SLP_CLK_OFF1 &= ~(1<<5); // 打开时钟
    R8_SLP_POWER_CTRL &= ~(1<<1); // 打开电源
    R8_SAFE_ACCESS_SIG = 0;

    // 补充，建议这里做个反初始化，防止意外。

    // 2 开启相应的中断，可选的，启用阻抗匹配电阻；
    // R8_ETH_EIE = RB_ETH_EIE_RXERIE | RB_ETH_EIE_TXERIE | RB_ETH_EIE_R_EN50 | RB_ETH_EIE_TXIE | RB_ETH_EIE_LINKIE | RB_ETH_EIE_RXIE;
    R8_ETH_EIE = 0; // 参考反汇编
    tmp = R8_ETH_EIE; // 这里回读为0
    PRINT("\r\n@%s L=%d, R8_ETH_EIE read out=%02X\r\n", __FUNCTION__, __LINE__, tmp);
    tmp |= 0xdb; // 1101 1011 参考反汇编
    R8_ETH_EIE = tmp; //  参考反汇编
    tmp = R8_ETH_EIE; // 这里回读为 0xDB
    PRINT("@%s L=%d, R8_ETH_EIE read out=%02X\r\n", __FUNCTION__, __LINE__, tmp);
    tmp |= 4; // 0b100 50电阻 参考反汇编
    R8_ETH_EIE = tmp; //  参考反汇编
    tmp = R8_ETH_EIE; // 这里回读为 0xDF
    PRINT("@%s L=%d, R8_ETH_EIE read out=%02X\r\n", __FUNCTION__, __LINE__, tmp);

    R8_ETH_EIR = 0xFF; //  参考反汇编

    tmp = R8_ETH_ESTAT;
    tmp |= 0xC0; //清中断和buf中断
    R8_ETH_ESTAT = tmp;//  参考反汇编写回

    tmp = R8_ETH_ECON2;
    // PRINT("@%s L=%d, R8_ETH_ECON2 read out=%02X\r\n", __FUNCTION__, __LINE__, tmp);
    tmp >>= 4;
    tmp <<= 4; // 清理低4位
    R8_ETH_ECON2 = tmp;

    tmp = R8_ETH_ECON2;
    // PRINT("@%s L=%d, R8_ETH_ECON2 read out=%02X\r\n", __FUNCTION__, __LINE__, tmp);
    tmp |= 4;
    R8_ETH_ECON2 = tmp;
    tmp = R8_ETH_ECON2;
    // PRINT("@%s L=%d, R8_ETH_ECON2 read out=%02X\r\n", __FUNCTION__, __LINE__, tmp);

    tmp = R8_ETH_ECON1;
    PRINT("@%s L=%d, R8_ETH_ECON1 read out=%02X\r\n", __FUNCTION__, __LINE__, tmp);
    tmp |= 0xC0; // 复位发送和接收模块 
    R8_ETH_ECON1 = tmp;
    tmp = R8_ETH_ECON1;
    PRINT("@%s L=%d, R8_ETH_ECON1 read out=%02X\r\n", __FUNCTION__, __LINE__, tmp);

    //清高2位后，再写回
    tmp &= 0x3F; // 取消复位状态
    R8_ETH_ECON1 = tmp;
    tmp = R8_ETH_ECON1;
    PRINT("@%s L=%d, R8_ETH_ECON1 read out=%02X\r\n", __FUNCTION__, __LINE__, tmp);

    R8_ETH_ERXFCON = 0;

    tmp  = R8_ETH_MACON1;
    tmp |= 1; // MAC 接收使能
    R8_ETH_MACON1 = tmp;

    tmp = R8_ETH_MACON2;
    tmp &= 0x1F; //清高3位后，再写回 RB_ETH_MACON2_PADCFG
    R8_ETH_MACON2 = tmp;

    tmp = R8_ETH_MACON2;
    tmp |= 0x20; // 所有短包填充 0 至 60 字节，再 4字节 CRC；
    R8_ETH_MACON2 = tmp;

    tmp = R8_ETH_MACON2;
    tmp |= 0x10; // 硬件填充 CRC
    R8_ETH_MACON2 = tmp;

    tmp = R8_ETH_MACON2;
    tmp &= 0xfb; // 1111 1011 清除 巨型帧
    R8_ETH_MACON2 = tmp;

    tmp = R8_ETH_MACON2;
    tmp |= 0x01; // 全双工
    R8_ETH_MACON2 = tmp;

    R16_ETH_MAMXFL = 0x24f; // 0x24f 1500 最大包长，需要确定

    // 3 配置接收过滤模式、CRC 功能、MAC 地址；
    // R8_ETH_ECON2 = 0x07; // 默认值 0x06，但读出来为4。

    R32_ETH_HTL = 0x65820294;
    R32_ETH_HTH = 0x220B1858;

    // 设置MAC地址
    // R32_ETH_MAADRL = macaddr[0] | (macaddr[1] << 8) | (macaddr[2] << 16) | (macaddr[3] << 24);
    // R16_ETH_MAADRH = macaddr[4] | (macaddr[5] << 8);
    {
        uint8_t *ptr = (uint8_t *)&R32_ETH_MAADRL;
        uint32_t value;
        uint32_t i;

        PRINT("mac ptr = %p\r\n", ptr);

        for(i=0; i<6; i++)
        {
            tmp = *macaddr;
            PRINT("mac #%d = %02X\r\n", i, tmp);
            *ptr = tmp;
            ptr++;
            macaddr++;
        }

        value = R32_ETH_MAADRL;
        PRINT("R32_ETH_MAADRL: 0x%08X\r\n", value);

        value = R16_ETH_MAADRH;
        PRINT("R16_ETH_MAADRH: 0x%04X\r\n", value);
    }

    // R32_ETH_MACON = 0x10310100; //直接用最终值，后面再做分解。

    R8_ETH_ECON1 |= RB_ETH_ECON1_RXEN; // 收发控制，测试用

    // 4 设置缓存；
    R16_ETH_ERXST = (uint32_t)ch57x_rx_buf;


    // 5 启动接收，开启中断。
    R8_ETH_EIE |= RB_ETH_EIE_INTIE;

    return 0;
}