嵌入式系统扩展网卡的实现

智能电子设备具备多个以太网通信网卡是电力二次设备的标准配置。针对LPC4078芯片只有一个原生网卡的限制,提出基于BCM53101交换芯片扩展多个网卡的技术方案,利用BCM53101的VLAN和TAG技术特性,实现了多个独立网卡扩展,满足了智能电子设备多个网卡应用需求。该方案能降低硬件的设计难度和成本,具有较好的工程应用价值。

According to the limit that the LPC4078chip has only one native network card,this paper puts forward the technical scheme of extending the network cards with the help of the BCM53101,which has VLAN and TAG technical characteristics.This scheme has solved the problem of independent network with BCM53101and has met the application requirements of the intelligent electric Equipment with multiple network cards.This scheme reduces the design difficulty and cost of hardware,and has a good engineering application value.