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Are you sure that both CPU are connected to the same shared memory, that SHM is the correct address, and that this memory isn't used for anything else? (including the text, ro, rw, bss, stack and head sections)
I'd suggest to put SignalTap probes on the shared memory control signals to verify that the first CPU is correctly writing the value and see what the second one is reading.
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Yes I'm sure that both CPU are connected to the shared RAM, this memory is only connected to cpu data masters, to clk and reset signals
Could you please tell how use and put SignalTap probes on the shared mem? what are signal tap probes? is there any tutorial??
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