Io channel conflicts with global/local memory?

Hi,

Thank you for the reply.My understanding of this warning is that global memory will interrupt the transfer of the io channel, causing data to be unreadable from the fpga external interface.However, the problem we are currently experiencing is that the data read from the kernel using the io channel cannot be returned to the host.

We verify the correctness of the data read from the io channel as follows:

Use io channel to read data from fpga's io into the kernel. Then perform a simple addition operation in the kernel and pass the data to the fpga external led through the io channel. By observing the 8-bit led, we find that the 8-bit led expresses the data from the kernel in binary form.However, this data cannot be passed back from kernel to host.In particular, if we use the io channel, even if the data is manually assigned in the kernel, this data cannot be passed back from the kernel to host.So can you give me some advice on this issue?

Thanks in advance for any advice.