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Kishore Saldanha

I2C issues on Armbian for Nano Pi Neo2

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Hi,

I am trying to interface I/O expander MCP23017 to Nano Pi Neo2(Hardware specs:1 GB RAM, Gigabit Ethernet . Software specs: Debian Buster with Armbian Linux 4.19.59-sunxi64
) .   The issue I am having is I am not able to see the device when I run sudo i2cdetect -y 0 . I have enabled i2c overlays in /boot/armbian.txt . 

I am using 10 K Ohm pull-ups on SDA and SCK . I get no activity while running i2cdetect on the oscilloscope on SCK and SDA lines . Is this an issue with the kernel ?

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Shouldnt a problem with the kernel.
Why you didnt activate the overlay via armbian-config ==> system ==> hardware?

 

When you can execute i2cdetect - you already did install the i2c-tools ;)

i2c0_activ.jpg

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