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→But what is an encoder?
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By pressing down on the top of an encoder a completely separate switch can be operated without any alteration of the rotating component (hopefully).
By pressing down on the top of an encoder a completely separate switch can be operated without any alteration of the rotating component (hopefully).
This used to select the page of parameter you are to use, which is demonstrated by a grey screen activated by a short push of the encoder. This is a basic Zynthian function and it is used to indicate selection in the zynthian world.
This used to select the page of parameter you are to use, which is demonstrated by a grey screen activated by a short push of the encoder. This is a basic Zynthian function and it is used to indicate selection in the zynthian world.
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+==Encoders connected using a MCP23017 chip==
+As an interface grows ( when 4 user definable switches were added to V3 (?) we had already moved away from the direct encoder route in favour of a much more efficient way of reading encoders and switches, which passed off some of the effort to another piece of silicon. The MCP23017 16 port I2C multiplexer. This board meant the communication between the Raspberry Pi and this 20 pinned chip could be handled by only a few wires at the Pi end, and a standard form of communication called I2C.
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+The zynaptik-3 board from zynthian provides all the interfaces for encoders and the extra switches introduced, along with MIDI interfaces and Control voltage and digital ins and outs which represents the official implementation of this sort of approach.