read state of pcf after a reboot

[michael]

hi renzo,

i am going to use the pcf as a replacement for mcp23017. all ports are outputs (16). when using the mcp, pinmode putput, i can still read the registers state with readgpioab. this is very useful after a reboot to know in which state the mcp pins are (high or low). is it also possible to do the same with pcf? get the state of all outputs after a reboot? tnx for your help. mike

[Renzo Mischianti]

Hi Mike,
Probably pcf8474 maintains the state with the continuous current.
But my library restarted the pcf in Setup and I think you lost all.
Bye Renzo

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