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funcctional Block Diagram

Hi, I do have a MT7620 Board, and want to use RGMII port, on the datasheet comes with board, it shows me a diagram like what I post. the red circle area. shows that somehow the RGMII comes in to the switch port which by my understanding is the LAN port on the board.

my question is how I can enable the RGMII, and connect it with my device(which port on the board I should connect). Is it a auto config or I need to do something for it(eg, DTS).

I am new to this, so please answer more detail. and If I make anything not clear, ask. Thanks

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2 回答 2

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我不确定您使用的具体电路板，但是必须配置 RGMII 引脚。如果将 PHY 连接到微控制器，则需要指定 TX 和 RX 时钟以及其他数据引脚的协商速度。类似的东西——

const IfxGeth_Eth_RgmiiPins Rgmiipins = {
        //Set the reference clock
        .txClk = &IfxGeth_TXCLK_P11_4_OUT , 
        .txd0 = &IfxGeth_TXD0_P11_3_OUT ,
        .txd1 = &IfxGeth_TXD1_P11_2_OUT ,
        .txd2 = &IfxGeth_TXD2_P11_1_OUT ,
        .txd3 = &IfxGeth_TXD3_P11_0_OUT ,
        .txCtl = &IfxGeth_TXCTL_P11_6_OUT , 
        .rxClk = &IfxGeth_RXCLKA_P11_12_IN ,
        .rxd0 = &IfxGeth_RXD0A_P11_10_IN ,
        .rxd1 = &IfxGeth_RXD1A_P11_9_IN ,
        .rxd2 = &IfxGeth_RXD2A_P11_8_IN ,
        .rxd3 = &IfxGeth_RXD3A_P11_7_IN ,
        .rxCtl = &IfxGeth_RXCTLA_P11_11_IN ,    
        .mdc = &IfxGeth_MDC_P12_0_OUT ,     
        .mdio = &IfxGeth_MDIO_P12_1_INOUT , 
        .grefClk = &IfxGeth_GREFCLK_P11_5_IN ,  
};

现在您说您正在将其连接到笔记本电脑。我不完全理解你的问题，但是如果某处涉及到 linux 内核，那么是的，你需要修改设备树。这是您可以开始的链接。这是一个示例，取自同一来源-

 ethernet@e000b000 {
            compatible = "cdns,zynq-gem", "cdns,gem";
            reg = <0xe000b000 0x1000>;
            status = "okay";
            interrupts = <0x0 0x16 0x4>;
            clocks = <0x1 0x1e 0x1 0x1e 0x1 0xd>;
            clock-names = "pclk", "hclk", "tx_clk";
            #address-cells = <0x1>;
            #size-cells = <0x0>;
            local-mac-address = [00 0a 35 00 00 00];
            phy-mode = "rgmii-id";
            xlnx,ptp-enet-clock = <0x6750918>;
            phy-handle = <0x4>;

            mdio {
                #address-cells = <0x1>;
                #size-cells = <0x0>;

                phy@1 {
                    compatible = "realtek,RTL8211E";
                    device_type = "ethernet-phy";
                    reg = <0x1>;
                    linux,phandle = <0x4>;
                    phandle = <0x4>;
                };
            };
        };

希望这会让你开始。

于 2019-10-04T14:46:54.120 回答
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已经好几天了，但没有人来回答，只是发布我为我的问题找到的内容。

我从实验室借了一些机器，这样我就可以检查船上的信号了。我将电路板连接到互联网，另一侧连接我的笔记本电脑。并在浏览器上打开一个视频页面。这样电路板和我的笔记本电脑之间就会有一些数据流。

我用机器检查电路图显示的板上的引脚属于RGMII。但是什么都没有，没有信号出现。这意味着默认情况下 RGMII 引脚不起作用。

所以我假设我需要编辑一些 DTS 来启用 RGMII 信号。但我现在不知道该怎么做。如果有人知道的话。请写下来。谢谢。

于 2016-09-12T18:39:55.583 回答