FPGA+双网卡 方案咨询？

ljt8015

(原文件名:未命名.JPG)


哪种方案性能更好，更经济？

asdr5

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crazy_stone

2方案应该经济一点

ericdai

看你的功能复杂不,如果fpga 用不完，那就把mac集成了最省事

laoxizi

什么应用啊？LED？

ljt8015

回复【2楼】crazy stone
2方案应该经济一点
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性能呢？

baojie423

laoxizi也在啊   一般选第一种简洁写吧

baojie423

积分是不是乱了啊

hyz_avr

你以前灌水太多吧..哈哈

jerrychenglei

请问楼主用什么系列的多达容量的FPGA,对PCB布板层数有要求吗?
如果板级布线希望少,而FPGA容量又充分,MAC IP是经过充分验证的可以
以上三个条件同时满足就用方案1

zzemu

可以参考 netfpga 项目

ljt8015

netfpga 太猛了，我们玩不转啊！~~~

msdy

如果是我,我选方案1,性能好,速度快

ljt8015

回复【12楼】msdy
如果是我,我选方案1,性能好,速度快
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速度快很多么？

在nios中有三个mac 的选择：1，cs8900     2,LAN91c111       3,speed net

哪个更快！~~  更好！~~

laoxizi

回复【6楼】baojie423  风之子
laoxizi也在啊   一般选第一种简洁写吧
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哈哈，你也搞这个了？

Nuker

第一种需要FPGA资源比第二种多很多，因为要在FPGA内部实现两个MAC以及需要较多的内部RAM作Buffer/FIFO，所以需要更大容量的FPGA，因此成本较高，FPGA设计也较复杂，而第二种方案采用的MAC+PHY芯片比单独的PHY芯片贵得不多，所以第二种方案更实际，除非楼主选了一个很大容量的FPGA，资源上有很大的富裕，否则不建议采用第一种方案。