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Discussion - Hardware / UMFT4222EV not sending/received I2C (Win 10)
« on: April 24, 2020, 12:41:27 AM »
I have two UMFT4222EV modules that used to work great, but now I can't get either to receive or send I2C using the same code that worked great a few months ago.
The only thing I can think that changed was a fresh reinstall of Windows since then.
My test app lists all the FTDI devices (FT4222 A and B, twice, since I tried plugging both in to make them talk). It can get clock speed and address and everything looks fine.
But nothing is coming out -- I've hooked it up to a logical analyzer and also a scope. Nothing on Clock/Data.
I've tried removing the driver and reinstalling. It's bound to be a "strange windows thing."
Anyone encountered this?
The only thing I can think that changed was a fresh reinstall of Windows since then.
My test app lists all the FTDI devices (FT4222 A and B, twice, since I tried plugging both in to make them talk). It can get clock speed and address and everything looks fine.
But nothing is coming out -- I've hooked it up to a logical analyzer and also a scope. Nothing on Clock/Data.
I've tried removing the driver and reinstalling. It's bound to be a "strange windows thing."
Anyone encountered this?