Raspberry# IO

See the Raspberry# IO Wiki for full documentation and samples.

Introduction

Raspberry# IO is a .NET/Mono IO Library for Raspberry Pi. This project is an initiative of the Raspberry# Community.

Current release is an early public release. Some features may not have been extensively tested. Raspberry# IO currently supports low- and high-level GPIO input/output, support for SPI and I2C peripherals.

Samples for SPI (for MCP3008 ADC or MCP4822 DAC), I2C (for MCP23017 I/O Expander), HD44780 LCD display and HC-SR04 distance sensor are provided.

Support for extended I/O (such as SDI, or PWM for motor control) is planned for future releases.

Programs using Raspberry# IO must be run with elevated privileges, for example the Test.Gpio.Chaser program included in solution:

sudo mono Test.Gpio.Chaser.exe -loop

Features

Raspberry.IO.GeneralPurpose

Raspberry.IO.GeneralPurpose provides a convenient way to use Raspberry Pi GPIO pins, while using .NET concepts, syntax and case. You can easily add a reference to it in your Visual Studio projects using the Raspberry.IO.GeneralPurpose Nuget.

It currently support the following features:

Low-level:

Access to GPIO pins through in 3 flavors: basic (using files), through memory, and full (memory with support for edge detection through "pseudo-interrupt"). By default, full driver is used.
Addressing through processor pin number or connector pin number
Pin assignment of various Raspberry Pi revisions (as of 2013-09, Raspberry Pi model B rev1 and rev2 as well as Raspberry Pi model A, including rev2 P5 connector)
Controlled use of resources using a IDisposable component and ability to use edge detection instead of polling
Support sub-millisecond polling of input pins

High-level:

Giving custom name to pins for more readable code
Easy-to-use, declarative configuration of pins. Ability to revert the polarity (1/0) of pins; ability to use an input pin as a switch button
Firing of events when pin status change (input as well as output), using polling
High-level behaviors for output pins, including blink, pattern and chaser

Raspberry.IO.SerialPeripheralInterface

Preliminary support for SPI through Raspberry.IO.SerialPeripheralInterface assembly
Includes SPI samples for MCP3008 ADC and MCP4822 DAC
Includes support for Linux's kernel SPI module driver spi-bcm2708 (/dev/spidev0.0)

Raspberry.IO.InterIntegratedCircuit

Preliminary support for I2C through Raspberry.IO.InterIntegratedCircuit assembly
Includes I2C sample for MCP23017 I/O expander

Raspberry.IO.Components

Preliminary support for various components through Raspberry.IO.Components assembly
Includes samples for
- HD44780 LCD display
- HC-SR04 distance detector
- Pca9685 PWM LED Controller (as used in the Adafruit 16-Channel 12-bit PWM/Servo Driver)
- TLC59711 PWM LED Controller (as used in the Adafruit 12-Channel 16-bit PWM LED Driver)

Parts of Raspberry# IO are inspired by BCM2835 C Library and Gordon Henderson's WiringPi.

raspberry-sharp/raspberry-sharp-io

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