TMS320F28377D: EMIF使用时一个基础却想不通的问题

你好，抱歉回复晚了，参考下工程师的回复：

user5229665 说：

当DSP读FPGA时，不是应该把 片选cs拉低，read有效，写无效，并且要把表示地址的GPIO输出成你想要读的地址吗？

Yes, all those things you indicate should happen. Once the EMIF is configured correctly, any access to the CS2 address range should drive those signals automatically. i.e. the code need not do anything explicit.

user5229665 说：

现有程序中只有这些代码：当读的时候，就把某个地址的数据取出来；写的时候，就向这个地址里写数。

It is likely the correct address is not being accessed. You need to debug the code on your end.

user5229665 说：

(而我的理解是当我读的时候，要向与FPGA连接的引脚干好多事(片选拉低 读有效 写无效，配置想读的地址)，然后再取地址中的数据啊）

You don't have to anything "manually" for this. The EMIF module drives the pins as needed.

user5229665 说：

为什么不去关注地址等其他引脚？

I think where you need to focus is whether your code generates the correct address for accessing the FPGA.