PL通过EMIO方式外接PHY芯片的实验

首先设置EMIO方式引出ETHE1



之后我们看到ZYNQ模块生长出了GMII接口如下图：



主要是三部分：

1，左边的ENET1_EXT_INITN是外部中断的输入。

2，MIO主控部分，时钟是输出的，数据是双向的，所以有一个方向选择T。我们可以简单做一个三态门实现。

3，GMII接口部分[注1]。

生成HDL文件之后接着我们从原理图上找到这些引脚的对应，做成XDC约束文件，主要部分如下：



#set_property -dict {PACKAGE_PIN Y11 IOSTANDARD LVCMOS33} [get_ports pmod_ja1];

set_property -dict {PACKAGE_PIN AD10 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_RXD[0]}];
set_property -dict {PACKAGE_PIN AC12 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_RXD[1]}];
set_property -dict {PACKAGE_PIN AD11 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_RXD[2]}];
set_property -dict {PACKAGE_PIN AD13 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_RXD[3]}];
set_property -dict {PACKAGE_PIN AB15 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_RXD[4]}];
set_property -dict {PACKAGE_PIN AB14 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_RXD[5]}];
set_property -dict {PACKAGE_PIN AE16 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_RXD[6]}];
set_property -dict {PACKAGE_PIN AE15 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_RXD[7]}];

set_property -dict {PACKAGE_PIN AD14 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_TXD[0]}];
set_property -dict {PACKAGE_PIN Y12 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_TXD[1]}];
set_property -dict {PACKAGE_PIN Y11 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_TXD[2]}];
set_property -dict {PACKAGE_PIN W13 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_TXD[3]}];
set_property -dict {PACKAGE_PIN Y13 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_TXD[4]}];
set_property -dict {PACKAGE_PIN W16 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_TXD[5]}];
set_property -dict {PACKAGE_PIN W15 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_TXD[6]}];
set_property -dict {PACKAGE_PIN Y17 IOSTANDARD LVCMOS33} [get_ports {ENET1_GMII_TXD[7]}];

set_property -dict {PACKAGE_PIN AC14 IOSTANDARD LVCMOS33} [get_ports ENET1_GMII_TX_CLK];
set_property -dict {PACKAGE_PIN AC13 IOSTANDARD LVCMOS33} [get_ports ENET1_GMII_RX_CLK];

set_property -dict {PACKAGE_PIN AE10 IOSTANDARD LVCMOS33} [get_ports ENET1_GMII_RX_DV];
set_property -dict {PACKAGE_PIN Y10 IOSTANDARD LVCMOS33} [get_ports ENET1_GMII_RX_ER];

set_property -dict {PACKAGE_PIN AA10 IOSTANDARD LVCMOS33} [get_ports ENET1_GMII_TX_EN];
set_property -dict {PACKAGE_PIN AA17 IOSTANDARD LVCMOS33} [get_ports ENET1_GMII_TX_ER];

set_property -dict {PACKAGE_PIN Y15 IOSTANDARD LVCMOS33} [get_ports ENET1_MDIO_MC];
set_property -dict {PACKAGE_PIN Y16 IOSTANDARD LVCMOS33} [get_ports ENET1_MDIO_MD];



注1 ： 关于GMII接口可以学习https://wenku.baidu.com/view/6d03c124bd64783e09122bab.html