Rpi is a lightweight and simple C library for Raspberry Pi using direct register control.

It maps the peripheral registers in memory using /dev/mem for PWM, I2C, SPI and /dev/gpiomem for GPIO control.

It is mainly used for iiot and m2m applications.

• GPIO
• PWM
• I2C (master)
• SPI

• Model: Pi Zero & Zero W, Pi Zero 2 W, Pi 3 Model B+, Pi 4 Model B, Compute Module 3 & 4 (Generally most of the 40-pin models)

Tried and tested on the following OS

• Raspbian
• Raspberry Pi OS (32 and 64-bit)
• 64-bit Ubuntu 20+ (Only GPIO peripheral is supported)

In your Raspberry Pi, clone the rpi repository.

$ git clone https://github.com/EdAlegrid/rpi

Go inside the directory to compile the library and the sample applications.

$ cd rpi

Compile the rpi source code and create an object file within the obj folder.

$ gcc -Wall -pedantic -c src/rpi.c -o obj/rpi.o

Compile the sample applications (gpio.c, pwm.c, i2c.c and others).

e.g. compiling the pwm.c ...

$ gcc -Wall -pedantic pwm.c obj/rpi.o -o pwm

Run the application.

$ sudo ./pwm

GNU General Public License v3.0