using mcp23008 interrupt for i2c lcd backpack

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tgmcnaughton
 
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Joined: Sat Mar 10, 2012 10:13 pm

using mcp23008 interrupt for i2c lcd backpack

Post by tgmcnaughton »

The LCD i2c/SPI shield uses the MCP23008 8-Bit I/O Expander which has INTerrupt capability on any of the pins configured as inputs.
https://pdf1.alldatasheet.com/datasheet ... 23008.html

I see on the schematic (link below) that the MCP23008's INT pin appears to be unconnected. Has anyone tried to utilize this feature? I'd like to connect the MCP23008 INT pin to an arduino input to have it trigger an ISR to then access the backpack.

https://cdn-learn.adafruit.com/assets/a ... 1473701923
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