Which device (in /dev) is the HDMI CEC device?

Question

I want to interact directly with the CEC protocol on my raspberry pi. How can I find out which device to use?

It doesn't exist in /dev. I'm using the latest version of Raspbian — demux, Apr 10 '18 at 10:54

score 1 · Answer 1 · answered Mar 23 '21 at 12:25

I understand the device name is /dev/vchiq, but you can't use it directly unless you get relevant VideoCore documentation. libcec uses the VideoCore API, which doesn't mention device names directly. Unless you want to use RPi-specific hardware features (and you know how to do it), you should just use libcec.

score 0 · Answer 2 · answered Mar 22 '21 at 23:45

0

on my raspbian installation it's /dev/ttyACM0

answered Mar 22 '21 at 23:45

dwayne

1

I'm pretty sure there's no such port on a Pi, unless you connect a USB device to it. – Dmitry Grigoryev Mar 23 '21 at 12:31
Isn't it /dev/cecN – Mats Karlsson Apr 04 '21 at 19:22

Which device (in /dev) is the HDMI CEC device?

2 Answers2