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++. Additional source code libraries are provided for Ada, C++, C#, Free Pascal, Modula-2, and Python that define OOP (Object Oriented Programming) thick binding classes for libsimpleio.

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.

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

Prebuilt libsimpleio packages for Debian Linux are available at:

http://repo.munts.com/debian11

	libsimpleio.pdf
	mcp2221.pdf
	remoteio.pdf

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

libremoteio libremoteio-templates libsimpleio libsimpleio-templates

Questions or comments to Philip Munts phil@munts.net