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+--- Thread: i2c debugging (/showthread.php?tid=5808)
i2c debugging - jgullickson - 03-04-2018
I'm having trouble getting a port expander (MCP23017) connected over i2c to work and I'm not sure where things are breaking-down.
I'd like to start by confirming that I have all of the operating system/configuration bits in-place before diving into the hardware side of things.
What is the best way to check to make sure I have the right kernel/modules/etc. to make i2c work? I'm using Armbian and have the i2s tools for Debian installed.
Thanks!
RE: i2c debugging - jgullickson - 03-05-2018
FWIW I changed the values of the pull-up resistors I was using on the i2c bus and things started working.
I'd still like to know how to tell from Linux if i2c is setup correctly software-wise, but I thought I should note that the underlying problem has been solved.