COMEX-IE38M: Linux: Mint
Overview
- COMEX-IE38M supports Linux Mint 18 LTS with full-featured desktop environment
- All necessary drivers and tools are already installed
- Networking, sound, video acceleration, 2D and 3D graphics and other features work out of the box
Display Interfaces
- By default HDMI output is enabled and eDP output disabled in the Linux package
- To enable eDP output need to remove "video=eDP-1:d" kernel boot option from /boot/grub/grub.cfg and /etc/default/grub
GPIO Signals Details
| GPIO name | Direction | Pin # | Default Function | PU/PD/Plane |
| 444 | In | A54 | SD_DATA0 | PU 20k (S0) |
| 445 | In | A63 | SD_DATA1 | PU 20k (S0) |
| 446 | In | A67 | SD_DATA2 | PU 20k (S0) |
| 447 | In | A85 | SD_DATA3 | PU 20k (S0) |
| 443 | Out | A93 | SD_CLK | 20k PD |
| 449 | Out | B54 | SD_CMD | PU 20k (S0) |
| 417 | Out | B57 | SD_WP | PU 10k (S5) |
- The GPIO sysfs interface allows users to manipulate any GPIO from userspace dynamically.
- A basic example of GPIO 417 Pin B57 (P19-6 on SB-COMEXmini) usage as root user:
$ echo 417 > /sys/class/gpio/export $ echo out > /sys/class/gpio/gpio417/direction $ echo 1 > /sys/class/gpio/gpio417/value ## at this point voltage measuring on B57 (or P19-6) should give 1.3V $ echo 0 > /sys/class/gpio/gpio417/value ## at this point voltage measuring on B57 (or P19-6) should give 0.0V $ echo 417 > /sys/class/gpio/unexport
- The GPIO framework and GPIO sysfs interface are documented in https://www.kernel.org/doc/Documentation/gpio/gpio.txt
