isn't it just coming in via /dev/tty??? serial?
Thank you for the replay,I learned that Every host_send call from the MCU will trigger an interrupt to host CPU.
Is it a serial interrupt ? Could you explain something in details?
I am not familar with this part!
As you can see in Using the MCU SDK and API: Code examples | Intel® Developer Zone, the MCU communicates with the CPU by running the script found under the 'Communicating between the host and the MCU' section. And in fact a few lines bellow the script you can find the instructions on how to read the data sent by the MCU.
Regarding shared memory, a thread on how it works can be found in Re: MCU shared memory.