[Invalid] - I2C NanoPI Neo Plus2, doesn't work

[Guest]

gpio load i2c
modprobe: FATAL: Module i2c-sunxi not found in directory /lib/modules/4.14.111

By looking at example of WiringPI (for Raspberry), I tried the above command, result is shown.

 

I'm newbie, so I need to figure out how to send commands via i2c to an external device.

But first, how do I even enable i2c on Neo Plus2? Or is it enabled on default? I saw on this forum suggestion to add:

a line "overlays=i2c0 i2c1" in /boot/armbianEnv.txt

However, my boot directory is full, so and I get error 514 whenever I try to add anything to armbianEnv.txt (which is empty)

Here's disk usage:

 

I added 10K pull up resistors between Pin #1 SYS_3.3V and  Pin #3 I2C0_SDA / GPIOA12 and Pin #5 I2C0_SCL / GPIOA11.

 

Result of i2cdetects:

 

However, when I tried to output from I2C0_SCL pin the following:

 sudo i2cset -y 3 0x30 255 (writes the byte value 255 to the I2C device at address 30 hex on the i2c-3 bus)

And I was checking with scope the pins I2C0_SDA and I2C0_SCL, and nothing was shown there, other than 3.3V.

 

Also, I'm not sure where bus 3 is, I mean don't pins I2C0_SDA and I2C0_SC correspond bus to i2c-3? There are no other pins for other I2c buses...

[Werner]

Your issue report is not a valid bug report per the Armbian bug reporting instructions (https://www.armbian.com/bugs).  With limited resources the Armbian project is only able to spend time on issues where all the requested information has been provided and for only the boards/images/software that are supported.  Your report is invalid for one or more of the following reasons (non-exhaustive list):

 

• it is for an unsupported board or image (CSC/EOS/WIP/edge)
• it is for software that is not supported (such as userspace modules installed on top of the core operating system)
• it has been logged in the wrong forum (for example requests for help that are not actual bug reports)
• it lacks requested data (armbianmonitor output)
• it could have been easily solved by a quick search and/or reading documentation

 

Please review what you have submitted and the bug logging instructions (https://www.armbian.com/bugs) and either add the required information or open a new topic in the correct forum (such as Common issues / peer to peer technical support or General chit chat)