Support 8-bit expanders like the PCF8574 👾 #4
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Why not just use https://github.com/adafruit/Adafruit_CircuitPython_PCF8574? |
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Oh, I wasn't aware of it. I'm going to file a different bug then... |
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This change extends the PCF8575 class to support 8-bit expanders like the PCF8574, PCA9500, and a bunch of others.
An instance of the class can be constructed with an additional
gpios=8argument. Theread_gpioandwrite_gpiouse the value passed to determine whether they should write 8 vs 16-bit values.Note that if using 8-bit values,
self._readbuf[1]remains 0, sox | (self._readbuf[1] << 8)is a no-op. Similar forself._writebuf[1].