What is the purpose of the GPIO2 connected to ground in PCB v1.1? #126
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I found this when I was redrawing the schematic, U1's GPIO2 was connected to ground but U2's wasn't. I'm wondering if this is used to identify the master device or has some other purpose, but I didn't find any GPIO2 related definitions or IO manipulation code in the source code.
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Replies: 2 comments
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Great catch, and you are right - the idea was to provide a way to identify which board the code was running on, but that would mean handling old boards differently. In the meantime I managed to design a detection routine for the existing boards by using internal pull-up/downs, so it's proooobably going to be deprecated. |
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Thanks, I know how to deal with it now. |
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Great catch, and you are right - the idea was to provide a way to identify which board the code was running on, but that would mean handling old boards differently. In the meantime I managed to design a detection routine for the existing boards by using internal pull-up/downs, so it's proooobably going to be deprecated.