Contexts 3 5 3 – Fast Window Switcher Wiring

1. Contexts 3 5 3 – Fast Window Switcher Wiring Diagram
2. Contexts 3 5 3 – Fast Window Switcher Wiring Manual
3. Contexts 3 5 3 – Fast Window Switcher Wiring Chart
4. Contexts 3 5 3 – Fast Window Switcher Wiring Instructions

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Hardware interfaces for the Raspberry Pi 2 and Raspberry Pi 3 are exposed through the 40-pin header J8 on the board. Functionality includes:

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• 24x - GPIO pins
• 1x - Serial UARTs (RPi3 only includes mini UART)
• 2x - SPI bus
• 1x - I2C bus
• 2x - 5V power pins
• 2x - 3.3V power pins
• 8x - Ground pins

GPIO Pins

Let's look at the GPIO available on this device.

GPIO Pin Overview

Contexts 3 5 3 – Fast Window Switcher Wiring Diagram

The following GPIO pins are accessible through APIs:

* = Raspberry Pi 2 ONLY. GPIO 35 & 47 are not available on Raspberry Pi 3.

GPIO Sample

Ommwriter 1 56 download free. As an example, the following code opens GPIO 5 as an output and writes a digital '1' out on the pin:

When you open a pin, it will be in its power-on state, which may include a pull resistor. To disconnect the pull resistors and get a high-impedance input, set the drive mode to GpioPinDriveMode.Input:

When a pin is closed, it reverts to its power-on state.

Pin Muxing

Some GPIO pins can perform multiple functions. By default, pins are configured as GPIO inputs. When you open an alternate function by calling I2cDevice.FromIdAsync() or SpiDevice.FromIdAsync() , the pins required by the function are automatically switched ('muxed') to the correct function. When the device is closed by calling I2cDevice.Dispose() or SpiDevice.Dispose(), the pins revert back to their default function. If you try to use a pin for two different functions at once, an exception will be thrown when you try to open the conflicting function. For example,

Contexts 3 5 3 – Fast Window Switcher Wiring Manual

Serial UART

There is one Serial UART available on the RPi2/3: UART0

• Pin 8 - UART0 TX
• Pin 10 - UART0 RX

The example below initializes UART0 and performs a write followed by a read:

Note that you must add the following capability to the Package.appxmanifest file in your UWP project to run Serial UART code:

Visual Studio 2017 has a known bug in the Manifest Designer (the visual editor for appxmanifest files) that affects the serialcommunication capability. If your appxmanifest adds the serialcommunication capability, modifying your appxmanifest with the designer will corrupt your appxmanifest (the Device xml child will be lost). You can work around this problem by hand editing the appxmanifest by right-clicking your appxmanifest and selecting View Code from the context menu.

I2C Bus

* = Raspberry Pi 2 ONLY. GPIO 35 & 47 are not available on Raspberry Pi 3.

GPIO Sample

Ommwriter 1 56 download free. As an example, the following code opens GPIO 5 as an output and writes a digital '1' out on the pin:

When you open a pin, it will be in its power-on state, which may include a pull resistor. To disconnect the pull resistors and get a high-impedance input, set the drive mode to GpioPinDriveMode.Input:

When a pin is closed, it reverts to its power-on state.

Pin Muxing

Some GPIO pins can perform multiple functions. By default, pins are configured as GPIO inputs. When you open an alternate function by calling I2cDevice.FromIdAsync() or SpiDevice.FromIdAsync() , the pins required by the function are automatically switched ('muxed') to the correct function. When the device is closed by calling I2cDevice.Dispose() or SpiDevice.Dispose(), the pins revert back to their default function. If you try to use a pin for two different functions at once, an exception will be thrown when you try to open the conflicting function. For example,

Contexts 3 5 3 – Fast Window Switcher Wiring Manual

Serial UART

There is one Serial UART available on the RPi2/3: UART0

• Pin 8 - UART0 TX
• Pin 10 - UART0 RX

The example below initializes UART0 and performs a write followed by a read:

Note that you must add the following capability to the Package.appxmanifest file in your UWP project to run Serial UART code:

Visual Studio 2017 has a known bug in the Manifest Designer (the visual editor for appxmanifest files) that affects the serialcommunication capability. If your appxmanifest adds the serialcommunication capability, modifying your appxmanifest with the designer will corrupt your appxmanifest (the Device xml child will be lost). You can work around this problem by hand editing the appxmanifest by right-clicking your appxmanifest and selecting View Code from the context menu.

I2C Bus

Let's look at the I2C bus available on this device.

I2C Overview

Yosemite cache cleaner 9 0 7. There is one I2C controller I2C1 exposed on the pin header with two lines SDA and SCL. 1.8KΩ internal pull-up resistors are already installed on the board for this bus.

The example below initializes I2C1 and writes data to an I2C device with address 0x40:

Contexts 3 5 3 – Fast Window Switcher Wiring Chart

SPI Bus

There are two SPI bus controllers available on the RPi2/3. Photolemur 3 1 1 0.

Contexts 3 5 3 – Fast Window Switcher Wiring Instructions

SPI0

SPI1

SPI Sample

An example of how to perform a SPI write on bus SPI0 using chip select 0 is shown below: