Hi Ping Zhou,
I'm using two MK20DX256VLQ10 and code warrior.
I need to use one microcontroller as master and the other as slave.
Firs:t The Master sends the request to the slave(receiving data)
Second: The slave sends its data to the master.
But the master needs to read buffer block by buffer block for this reason it needs to wait while the master sends or receives the buffer block complete.
Best Regards,
Ivan.