Linux Simple I/O Library

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libsimpleio is an attempt to encapsulate (as much as possible) the ugliness of Linux I/O device access. It provides services for the following types of I/O devices:

Industrial I/O Subsystem A/D (Analog to Digital) Converter Devices
Industrial I/O Subsystem D/A (Digital to Analog) Converter Devices
GPIO (General Purpose Input/Output) Pins
Raw HID (Human Interface Device) Devices
I²C (Inter-Integrated Circuit) Bus Devices
Labview LINX Remote I/O Devices
PWM (Pulse Width Modulated) Output Devices
Remote I/O Protocol Devices
Serial Ports
SPI (Serial Peripheral Interface) Bus Devices
Stream Framing Protocol Devices
TCP and UDP over IPv4 Network Devices
Watchdog Timer Devices

Although libsimpleio was originally intended for Linux microcomputers such as the Raspberry Pi, it can also be useful on larger desktop Linux systems.

The C wrapper functions exported by libsimpleio all follow the same uniform pattern:

All C wrapper functions are proper procedures (void f() in C).
All input arguments of primitive types (int, float, etc.) are passed by value.
All output arguments of primitive types are passed by reference (int *, float *, etc.).
All composite types are passed by reference.
int32_t is used wherever possible for int and bool arguments.

All of the C wrapper functions are declared between _BEGIN_STD_C and _END_STD_C for C++. Binding modules are provided for Ada, C#, and Free Pascal. Additional source code libraries are provided for Ada, C++, C#, and Free Pascal that define OOP (Object Oriented Programming) classes for libsimpleio.

Documentation

The user manual for libsimpleio is available at UserManual.pdf. Installation instructions are on pages 6 and 7.

The man pages specifying the libsimpleio API are available at libsimpleio.html.

Git Repository

The libsimpleio source code tree is available at:

https://github.com/pmunts/libsimpleio

Use the following command to clone it:

git clone https://github.com/pmunts/libsimpleio.git

Debian Package Repository

Prebuilt libsimpleio packages for Debian Linux are available at:

http://repo.munts.com/debian11

Alire Crates

	libsimpleio.pdf
	mcp2221.pdf
	remoteio.pdf

Make With Ada Projects

2017 Ada Embedded Linux Framework
2019 Modbus RTU Framework for Ada (Prize Winner!)

Questions or comments to Philip Munts phil@munts.net

I am available for custom system development (hardware and software) of products using ARM Linux or other microcomputers.