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raspberry-sharp/raspberry-sharp-io: A .NET/Mono IO Library for Raspberry Pi

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

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

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

• 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)

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

• 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.

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