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GPIO expansion board
Posted: Wed Jul 15, 2015 5:32 pm
by Spilly
Also, if you want to get really crazy, I can make a GPIO expansion board. For example, use three digital outputs from the STM32 to control 8, 16, or more outputs. The downside is changing the state of one of the outputs would take 10-100 microseconds longer depending on the communication protocol and number of outputs.
Re: GPIO expansion board
Posted: Wed Jul 15, 2015 5:53 pm
by AndreyB
Maybe. Need to do the math and re-iterate the use-cases. We kind of have the issue of surface space shortage and we kind of have an issue of pin shortage with the 100 pin case, but also not so many outputs are so slow and we have not so many slow digital inputs like buttons or clutch switches. I'd say button inputs is the most realistic use-case.