GPIO Control + Simulator

This repo contains:

• gpio-sysfs.c — simple sysfs-based GPIO control (learning / compatibility).
• gpio-libgpiod.c — modern libgpiod-based GPIO control.
• simulator.py — virtual sysfs GPIO simulator (no hardware needed).
• Makefile, test.sh, .gitignore, this README.

Quick start (dev machine)

1. Build:

make

2. Run simulator & test:

./test.sh

Notes

• The sysfs program uses /sys/class/gpio by default. For simulation set VIRT_GPIO_ROOT to simulator root.
• gpio-libgpiod requires libgpiod development headers.
• Use Git to track sources; recommended files to include shown below.

Files to upload

• All .c, .h, Makefile, simulator.py, test.sh, README.md
• .gitignore (provided)

Flow Explanation:

1.GPIO Initialization:

Sets up GPIO pins, decides whether to use sysfs (older interface) or libgpiod (modern interface).

2. Sysfs / libgpiod Control:

Sysfs: export pins, set direction (in/out), write 0/1.

libgpiod: open GPIO chip, request line, set value.

3.Simulation / Visualization:

simulator.py shows LEDs turning on/off virtually.

test.sh can automate toggling sequences.

4.Verification:

Observe console outputs, LED simulation, or test scripts to verify GPIO behavior.

License

Add an appropriate license file if needed (e.g. LICENSE).

Linux exposes GPIOs to user-space and how you can toggle or read them — both using sysfs (older method) and libgpiod (modern method).