Add example for Scroll pHat (PowerShell#41)

* Added an example and a README  for the Scroll pHat device

* added the image

* yet another image, this time it's the result of the script

* Added the copyright. Changed from Lightning effect to brightness to be clearer. Added instructions to install the module and enable I2C

* Forgot to change one "lightning"

Author: DanielSSilva

Examples/Microsoft.PowerShell.IoT.Scroll_pHat/Microsoft.PowerShell.IoT.SadJoey.ps1

@@ -0,0 +1,36 @@
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+Import-Module Microsoft.PowerShell.IoT
+
+[int]$DeviceAddress = 0x60
+######### Configuration Register and Value #########
+[int]$ConfigurationRegisterAddress = 0x00
+[int]$ConfigurationRegisterValue = 0x1B
+
+######### Data Registers and value #########
+[int[]]$DataRegisterAddress = 0x04 ..0x08
+[int[]]$values = 0x12,0x08,0x08,0x08,0x12
+######### Brightness Register and value #########
+[int]$BrightnessRegisterAddress = 0x0D
+[int]$BrightnessRegisterValue = 0x08 #Lowest intensity
+
+######### Get the device and set the Configuration Register
+$Device = Get-I2CDevice -Id $DeviceAddress -FriendlyName phat
+Set-I2CRegister -Device $Device -Register $ConfigurationRegisterAddress -Data $ConfigurationRegisterValue
+
+######## Brightness #####
+Set-I2CRegister -Device $Device -Register $BrightnessRegisterAddress -Data $BrightnessRegisterValue
+
+######### Write the #sadJoey pattern to the Data registers #########
+$i = 0
+foreach ($register in $DataRegisterAddress) {
+    Set-I2CRegister -Device $Device -Register $register -Data $values[$i]
+    $i++
+}
+
+#In order to update the registers, we need to write something to the column register, accoding to the datasheet: "A write operation of any 8-bit value to the Update Column Register is required to update the Data Registers"
+[int]$UpdateRegisterAddress = 0x0C
+[int]$UpdateValue = 0xFF
+
+#After executing this instruction, a Sad Joey should appear on your pHat :)
+Set-I2CRegister -Device $Device -Register $UpdateRegisterAddress -Data $UpdateValue

Examples/Microsoft.PowerShell.IoT.Scroll_pHat/README.md

@@ -0,0 +1,48 @@
+# Example on how to interact with Scroll pHat
+
+With this example, we will see how we can interact with [Scroll pHat](https://shop.pimoroni.com/products/scroll-phat).
+
+## Information
+
+After reading the [driver's data sheet](http://www.issi.com/WW/pdf/31FL3730.pdf) we know the following:
+
+There are three "types" of registers: Configuration register, Update register and data registers.
+The configuration register value is set to have the expected behaviour of this pHat.
+
+There are 11 data registers, ranging from address 0x01 to 1x0B.
+Each register holds 1byte, but since ScrollPHat only has 5 lines, only 5bits are used.
+To set the LED on, you need to set the correspondent bits as 1, as example, to achieve the following:
+
+![](https://i.imgur.com/nII0q7B.jpg)
+
+we need to set the register 1 with data 0x0D (0000 1101).
+
+## Software setup
+
+### Install PowerShell Core on Raspberry Pi
+
+Installation instructions can be found [here](https://github.com/PowerShell/PowerShell/tree/master/docs/installation/linux.md#raspbian).
+
+### Enable I2C interface on Raspberry Pi
+
+1. `sudo raspi-config`
+2. `5 Interfacing options`
+3. `P5 I2C`
+4. `Would you like ARM I2C interface to be enabled -> Yes`
+
+Start PowerShell (**with sudo, so that you can access the I2C bus**)
+
+```powershell
+sudo pwsh
+
+git clone https://github.com/PowerShell/PowerShell-IoT.git #if you haven't already
+./PowerShell-IoT/Examples/Microsoft.PowerShell.IoT.Scroll_pHat/Microsoft.PowerShell.IoT.SadJoey.ps1
+```
+
+After running this code, you should see a "Sad Joey" on your Scroll pHat.
+
+Note: What's "Sad Joey"? - #SadJoey became "popular" meme/hastag [on twitter](https://twitter.com/search?q=%23sadJoey&src=typd) during the #PSConfEU 2018
+
+This is what you should see:
+
+![](https://i.imgur.com/112YDk4.jpg)

Examples/README.md

@@ -7,6 +7,7 @@ Example modules that leverage PowerShell IoT in a specific way.
 | Example | Difficulty | Type |
 |---------|------------|------|
 | [Microsoft.PowerShell.IoT.LED](/Examples/Microsoft.PowerShell.IoT.LED) | Easy | GPIO |
+| [Microsoft.PowerShell.IoT.Scroll_pHat](/Examples/Microsoft.PowerShell.IoT.Scroll_pHat) | Easy | I2C |
 | [Microsoft.PowerShell.IoT.BME280](/Examples/Microsoft.PowerShell.IoT.BME280) | Medium | I2C |
 | [Microsoft.PowerShell.IoT.SSD1306](/Examples/Microsoft.PowerShell.IoT.SSD1306) | Medium | I2C |
 | [Microsoft.PowerShell.IoT.ADXL345](/Examples/Microsoft.PowerShell.IoT.ADXL345) | Medium | I2C |