derived classes for specific IO expanders?

RobTillaart / MCP23S17

Arduino library for SPI based MCP23S17 16 channel port expander

MIT License

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derived classes for specific IO expanders? #4

Closed RobTillaart closed 2 years ago

RobTillaart commented 2 years ago

The mcp23S17 is one from a family:

mcp23S17 16 bit
mcp23S18 16 bit single address pin.
mcp23S08 8 bit
mcp23S09 8 bit higher clock I2C

They can be controlled by the mcp23S17 class but the 8 bit ones do not need the 16 pins interface recently added. So 23s08 can't be derived from 23s17 but the other way around means implementing all 23s17 code anyway

so a specific 23S08 class might be better.

idem for I2C variant.

RobTillaart commented 2 years ago

Created 4 separate classes, maybe merge in a (far) future