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Altera_Forum's avatar
Altera_Forum
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15 years ago

UART wierdness

I'm trying to interface with a cell phone to the DE2 board over serial. I've been able to successfully talk to the phone using my computer and an FTDI cable. I know the baud and all of the other se...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I can now see the first two images. The first one shows a bad connection, if I interpreted it correctly.

If you are using a RS232 cable, you can't make a star connection: only point to point is allowed, otherwise you'd have two transmitters driving the same line.

I think this is your problem.