I want to connect the MTi to overo air(expansion board is summit) using ttyS0, for changing the logic level,
I have made a circuit and it works as the communication(both read and write) between the summit ttyS0
and the PC ttyS0 very well. I have bitbaked the program of MTi and installed it in overo air. If I connect the MTi
to overo by usb-hub, and run the program it works. When I connect MTi by ttyS0, run the program,
it does not work. But on the scope,I can see the signal send from MTi (1.8v). and use
it shows the same as connecting the MTi to PC by ttyS0, of course, connecting to PC, the program works well as
connect to overo by usb-hub.
Anyone had the same case? Anyone help?