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Questions tagged [i2c]

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21 questions
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1 answer
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Sorry if this has been solved, but I would like to connect some drivers on Linux over I2C, but I only have USB available. I was going to use a FT4232 or FT260 USB to I2C; however, is there is a way to ...
Andrew Phillips's user avatar
  • 3
0 votes
2 answers
590 views

I am building custom game controllers on Linux that use the i2c bus present in video ports such as HDMI, dvi, and VGA, on standard PC hardware (x86_64). I would like to verify my current i2c bus speed ...
j0h's user avatar
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1 answer
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When I use ubuntu22.04, I use i2c-tools to identify that my current i2c adapter is a Synopsys DesignWare I2C adapter. However, when I use the Linux kernel 6.1 compiled by myself and load the two ...
Vimer's user avatar
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1 vote
0 answers
51 views

I try access multiple ICs via I2C over the MCP23017 I/O Expander for a custom embedded board. I know ICs I2C adresses. How should I add the MCP23017 to the device-tree? I think I need to add the ICs ...
alpd4's user avatar
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2 votes
2 answers
2k views

I’ve been experiencing significant system instability on my Ubuntu 24.04 machine after a recent BIOS update. The system randomly resets itself, and the logs show various errors. I’m hoping to get some ...
Terixer's user avatar
  • 21
1 vote
0 answers
338 views

I have a temp/humidity sensor connected to the i2c-0 interface on a Raspberry Pi: Rpi OS ver 'bookworm'. It works fine, and I can read sensor values from the files in /sys/class/hwmon/hwmon2 (or ...
Seamus's user avatar
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1 vote
1 answer
58 views

Week ago stylus have been added somehow between devices (I do not have own stylus for few months) and spam me with events every time laptop starts: $ sudo libinput debug-events | grep event5 -event5 ...
ldrahnik's user avatar
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1 vote
1 answer
311 views

I'm trying to register I2C gpio expander (PCF8575) on Odroid H3+/Ubuntu 22.04 using ACPI SSDT so later I can easly assign each GPIO as led and use nice names for toggling pins. I have following SSDT ...
Novakov's user avatar
  • 111
1 vote
0 answers
179 views

I am trying to read the acceleration data in the X, Y and Z axes from the LIS2DE12 accelerometer which is connected to an I2C-to-USB adapter, it is UMFT201XB. I am using a virtual machine in ...
Escris's user avatar
  • 11
0 votes
0 answers
105 views

I have a light sensor that uses I2C for data transmision. Now I want to display that data on a Website. The problem is www-data can't access I2C. I use a Python script that gets run by PHP (I know it'...
Bhasim's user avatar
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1 vote
0 answers
237 views

I'm trying to register an I2C RTC device on an x86 platform. I've disabled the PC-Style CMOS driver because I'm on an embedded platform and only my I2C RTC is properly backed up. Now when I load the ...
Davi Jones's user avatar
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2 votes
0 answers
638 views

I am using a zed board with a Zynq 7000 on it. The end goal is to have the I2c-0 controller in the physical PS of the Zynq7000 to act as an I2c slave device. I am using yocto/bitbake to generate linux ...
alexv9's user avatar
  • 21
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1 answer
3k views

I have to write a device driver code for temperature sensor using IOCTL, when I was going through a lot of sample codes, I found while surfing the net, I came across this difference in header file, I ...
hari's user avatar
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0 votes
0 answers
368 views

I have a single board computer with debian jessie installed on it. On this board, there is 2 RTC. One that is not backed up that correspond to rtc-cmos and the other one that is backed up and is ...
naeco's user avatar
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1 vote
0 answers
596 views

I have two sensors with different slave addresses connected on an i2c bus in my custom board. If two different programs try to read the different sensors a same moment of time, will it lead to an ...
skjoshi's user avatar
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