I/O controller board based on ATmega328P
Design a DI/DO extension board featuring opto-coupled pins to protect the board against over-voltage. The pins shall support a voltage range of 5-30VDC with a low current load (signal only).
- 4 DI pins (opto-coupled) supporting 5-30VDC (read-through)
- 4 DO pins (opto-coupled) supporting 5-30VDC (switch-through)
- Serial Communication Interface Client for Linux
Pin states can be read and written to using a serial communication client that is shiped with this repository. The directory linuxSerialClient/ contains a C++ file that serves a working example code, demonstrating how the serial client can be used on a Linux system. To build it, simply run make ioexample.run and start the binary.
Build Everything: make
Only Compile Example Code: make ioexample.run
Upload Compiled Code to IO Board: make upload
Clean Up Compiled Files: make clean
Make Sure Arduino Driver is Installed:
sudo apt install arduino
Check Linux Distribution:
cat /etc/*-release | grep PRETTY_NAME
If on Ubuntu / Debian:
sudo apt install -y gcc-avr binutils-avr avr-libc avrdude make
If on Fedora / Red Hat:
sudo dnf install -y avr-gcc avr-binutils avr-libc avrdude make
With the Arduino NOT plugged in, type sudo dmesg and hit enter. Then connect the Arduino to your computer and run sudo dmesg again to see what has changed. Check the last lines to find something like this:
[16792.214255] usb 1-1.1: ch341-uart converter now attached to ttyUSB0
This means that the Arduino is now connected to port "/dev/ttyUSB0". Note that under Ubuntu (and some other distros) there is a pre-installed application called BRLTTY that causes USB serial device detection to fail. This can be resoved by simply uninstalling BRLTTY. (You're Welcome!)