Hi,
I just got the Intel Galileo board and wanted to try the serial port(audio jack). I have the special 3.5mm to serial cable, and connect the board to my laptop(using another serial to usb cable together).
The problem is:
when I open a putty and start the serial session, I find it extremely lag to communicate with the board. I have to quickly press Enter several times, only to see one new line shows up. It is impossible to input some commands like ls or cat and see the result.
More information:
1. I notice that the input to board(which connects the PIN2 RING RXD of galileo board) works correctly. When I input root to login, even if I can't see what I input(because of the strange lag problem), after several Enter, I can find myself do logged into the system as root. So the problem may lie in the output part.
2. I use a multimeter to test the PIN3 TIP TXD to ground. And find that PIN3 TIP TXD is actually shorted to ground at the beginning. After one or two seconds, the resistance between PIN3 TIP TXD and ground remains stable at 4.66K ohm. However, the PIN2 RING RXD is always open to ground.
That is all I know for now. This problem happens on my two Intel Galileo boards, so it may be a common problem.
I doubt if there is some "bug" in the manufacture or board design? Anyone else has the same problem?
I'd appreciate any advises or suggestions.
Thank you!