├── rpitest ├── run.sh ├── global.json ├── nuget.config ├── rpitest.csproj ├── publish.bat ├── .vscode │ ├── tasks.json │ └── launch.json └── Program.cs ├── LCDDisplay ├── run.sh ├── global.json ├── nuget.config ├── Mcp23xxx │ ├── Port.cs │ ├── OpCode.cs │ ├── Bank.cs │ ├── Mcp23017.cs │ ├── Mcp23018.cs │ ├── Mcp23S18.cs │ ├── Mcp23S17.cs │ ├── Mcp23009.cs │ ├── Mcp23S09.cs │ ├── Mcp23S08.cs │ ├── Mcp230xx.cs │ ├── Mcp23Sxx.cs │ ├── Mcp23008.cs │ ├── Mcp23xxx.cs │ └── Register.cs ├── LCDDisplay.csproj ├── publish.bat ├── Lcm1602a1 │ ├── Commands.cs │ ├── Flags.cs │ └── Lcm1602a1.cs ├── .vscode │ ├── tasks.json │ └── launch.json └── Program.cs ├── LICENSE └── .gitignore /rpitest/run.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | sudo chmod +x rpitest 3 | ./rpitest -------------------------------------------------------------------------------- /LCDDisplay/run.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | sudo chmod +x LCDDisplay 3 | ./LCDDisplay -------------------------------------------------------------------------------- /rpitest/global.json: -------------------------------------------------------------------------------- 1 | { 2 | "sdk": { 3 | "version": "2.2.100" 4 | } 5 | } -------------------------------------------------------------------------------- /LCDDisplay/global.json: -------------------------------------------------------------------------------- 1 | { 2 | "sdk": { 3 | "version": "2.2.100" 4 | } 5 | } -------------------------------------------------------------------------------- /rpitest/nuget.config: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /LCDDisplay/nuget.config: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/Port.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | namespace Iot.Device.Mcp23xxx 6 | { 7 | public enum Port 8 | { 9 | PortA, 10 | PortB 11 | } 12 | } 13 | -------------------------------------------------------------------------------- /rpitest/rpitest.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | netcoreapp2.2 6 | 7 | 8 | 9 | --> 10 | 11 | 12 | 13 | 14 | -------------------------------------------------------------------------------- /LCDDisplay/LCDDisplay.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | Exe 5 | netcoreapp2.2 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | -------------------------------------------------------------------------------- /rpitest/publish.bat: -------------------------------------------------------------------------------- 1 | dotnet publish -r linux-arm /p:ShowLinkerSizeComparison=true 2 | pushd .\bin\Debug\netcoreapp2.2\linux-arm\publish 3 | 4 | REM Publish the .NET Core Framework ONCE, then just move the EXE 5 | 6 | REM Putty 7 | REM pscp -pw raspberry -v -r .\* pi@crowpi.lan:/home/pi/Desktop/rpitest 8 | REM pscp -pw raspberry -v -r .\rpitest pi@crowpi.lan:/home/pi/Desktop/rpitest 9 | 10 | REM Built-in OpenSSH 11 | REM scp -r .\* pi@crowpi.lan:/home/pi/Desktop/rpitest 12 | scp -r .\rpitest* pi@crowpi.lan:/home/pi/Desktop/rpitest 13 | 14 | popd -------------------------------------------------------------------------------- /LCDDisplay/publish.bat: -------------------------------------------------------------------------------- 1 | dotnet publish -r linux-arm /p:ShowLinkerSizeComparison=true 2 | pushd .\bin\Debug\netcoreapp2.2\linux-arm\publish 3 | 4 | REM Publish the .NET Core Framework ONCE, then just move the EXE 5 | 6 | REM Putty 7 | REM pscp -pw raspberry -v -r .\* pi@crowpi.lan:/home/pi/Desktop/LCDDisplay 8 | REM pscp -pw raspberry -v -r .\LCDDisplay pi@crowpi.lan:/home/pi/Desktop/LCDDisplay 9 | 10 | REM Built-in OpenSSH 11 | REM scp -r .\* pi@crowpi.lan:/home/pi/Desktop/LCDDisplay 12 | scp -r .\LCDDisplay* pi@crowpi.lan:/home/pi/Desktop/LCDDisplay 13 | 14 | popd -------------------------------------------------------------------------------- /LCDDisplay/Lcm1602a1/Commands.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | namespace Iot.Device.Lcm1602a1 6 | { 7 | internal enum Commands 8 | { 9 | LCD_CLEARDISPLAY = 0x01, 10 | LCD_RETURNHOME = 0x02, 11 | LCD_ENTRYMODESET = 0x04, 12 | LCD_DISPLAYCONTROL = 0x08, 13 | LCD_CURSORSHIFT = 0x10, 14 | LCD_FUNCTIONSET = 0x20, 15 | LCD_SETCGRAMADDR = 0x40, 16 | LCD_SETDDRAMADDR = 0x80 17 | } 18 | } 19 | -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/OpCode.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | namespace Iot.Device.Mcp23xxx 6 | { 7 | public static class OpCode 8 | { 9 | public static byte GetOpCode(int deviceAddress, bool isReadCommand) 10 | { 11 | int opCode = deviceAddress << 1; 12 | 13 | if (isReadCommand) 14 | { 15 | opCode |= 0b000_0001; // Set read bit. 16 | } 17 | 18 | return (byte)opCode; 19 | } 20 | } 21 | } 22 | -------------------------------------------------------------------------------- /rpitest/.vscode/tasks.json: -------------------------------------------------------------------------------- 1 | { 2 | "version": "2.0.0", 3 | "tasks": [ 4 | { 5 | "label": "build", 6 | "command": "dotnet", 7 | "type": "process", 8 | "args": [ 9 | "build", 10 | "${workspaceFolder}/rpitest.csproj" 11 | ], 12 | "problemMatcher": "$msCompile" 13 | }, 14 | { 15 | "label": "publish", 16 | "type": "shell", 17 | "dependsOn": "build", 18 | "presentation": { 19 | "reveal": "always", 20 | "panel": "new" 21 | }, 22 | "options": { 23 | "cwd": "${workspaceFolder}" 24 | }, 25 | "windows": { 26 | "command": "${cwd}\\publish.bat" 27 | }, 28 | "problemMatcher": [] 29 | } 30 | ] 31 | } -------------------------------------------------------------------------------- /LCDDisplay/.vscode/tasks.json: -------------------------------------------------------------------------------- 1 | { 2 | "version": "2.0.0", 3 | "tasks": [ 4 | { 5 | "label": "build", 6 | "command": "dotnet", 7 | "type": "process", 8 | "args": [ 9 | "build", 10 | "${workspaceFolder}/LCDDisplay.csproj" 11 | ], 12 | "problemMatcher": "$msCompile" 13 | }, 14 | { 15 | "label": "publish", 16 | "type": "shell", 17 | "dependsOn": "build", 18 | "presentation": { 19 | "reveal": "always", 20 | "panel": "new" 21 | }, 22 | "options": { 23 | "cwd": "${workspaceFolder}" 24 | }, 25 | "windows": { 26 | "command": "${cwd}\\publish.bat" 27 | }, 28 | "problemMatcher": [] 29 | } 30 | ] 31 | } -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/Bank.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | namespace Iot.Device.Mcp23xxx 6 | { 7 | ///

8 | /// The MCP28XXX family has an address mapping concept for accessing registers. 9 | /// This provides a way to easily address registers by group or type. 10 | ///

11 | public enum Bank 12 | { 13 | ///

14 | /// This mode is used specifically for 16-bit devices where it causes the 15 | /// address pointer to toggle between associated A/B register pairs. 16 | ///

17 | Bank0 = 0, 18 | ///

19 | /// This mode is used to group each port's registers together. 20 | /// This mode is the default since 8-bit devices only have one port and 21 | /// 16-bit devices are initialized in this state. 22 | ///

23 | Bank1 = 1 24 | } 25 | } 26 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2019 Scott Hanselman 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /rpitest/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Threading; 3 | using System.Device.Gpio; 4 | using System.Device.Gpio.Drivers; 5 | 6 | namespace rpitest 7 | { 8 | class Program 9 | { 10 | static void Main(string[] args) 11 | { 12 | Console.WriteLine("Hello World!"); 13 | GpioController controller = new GpioController(PinNumberingScheme.Board); 14 | var pin = 37; 15 | var lightTime = 300; 16 | var dimTime = 300; 17 | 18 | controller.OpenPin(pin, PinMode.Output); 19 | try 20 | { 21 | while (true) 22 | { 23 | Console.WriteLine($"Light for {lightTime}ms"); 24 | controller.Write(pin, PinValue.High); 25 | Thread.Sleep(lightTime); 26 | Console.WriteLine($"Dim for {dimTime}ms"); 27 | controller.Write(pin, PinValue.Low); 28 | Thread.Sleep(dimTime); 29 | } 30 | } 31 | finally 32 | { 33 | controller.ClosePin(pin); 34 | } 35 | } 36 | } 37 | } 38 | -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/Mcp23017.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | using System.Device.I2c; 6 | 7 | namespace Iot.Device.Mcp23xxx 8 | { 9 | public class Mcp23017 : Mcp230xx 10 | { 11 | ///

12 | /// Initializes new instance of Mcp23017 device. 13 | /// A general purpose parallel I/O expansion for I2C applications. 14 | ///

12 | /// Initializes new instance of Mcp23018 device. 13 | /// A general purpose parallel I/O expansion for I2C applications. 14 | ///

12 | /// Initializes new instance of Mcp23S18 device. 13 | /// A general purpose parallel I/O expansion for SPI applications. 14 | ///

12 | /// Initializes new instance of Mcp23xxx device. 13 | /// A general purpose parallel I/O expansion for I2C or SPI applications. 14 | ///

15 | /// The device address for the connection on the I2C or SPI bus. 16 | /// SPI device used for communication. 17 | /// Output pin number that is connected to the hardware reset. 18 | /// Input pin number that is connected to the interrupt for Port A (INTA). 19 | /// Input pin number that is connected to the interrupt for Port B (INTB). 20 | public Mcp23S17(int deviceAddress, SpiDevice spiDevice, int? reset = null, int? interruptA = null, int? interruptB = null) 21 | : base(deviceAddress, spiDevice, reset, interruptA, interruptB) 22 | { 23 | } 24 | 25 | public override int PinCount => 16; 26 | } 27 | } 28 | -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/Mcp23009.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | using System.Device.I2c; 6 | 7 | namespace Iot.Device.Mcp23xxx 8 | { 9 | public class Mcp23009 : Mcp230xx 10 | { 11 | ///

12 | /// Initializes new instance of Mcp23009 device. 13 | /// A general purpose parallel I/O expansion for I2C applications. 14 | ///

15 | /// I2C device used for communication. 16 | /// Output pin number that is connected to the hardware reset. 17 | /// Input pin number that is connected to the interrupt for Port A (INTA). 18 | /// Input pin number that is connected to the interrupt for Port B (INTB). 19 | public Mcp23009(I2cDevice i2cDevice, int? reset = null, int? interruptA = null, int? interruptB = null) 20 | : base(i2cDevice, reset, interruptA, interruptB) 21 | { 22 | } 23 | 24 | public override int PinCount => 8; 25 | 26 | public byte Read(Register.Address registerAddress) 27 | { 28 | return Read(registerAddress, Port.PortA, Bank.Bank1); 29 | } 30 | 31 | public byte[] Read(Register.Address startingRegisterAddress, byte byteCount) 32 | { 33 | return Read(startingRegisterAddress, byteCount, Port.PortA, Bank.Bank1); 34 | } 35 | 36 | public void Write(Register.Address registerAddress, byte data) 37 | { 38 | Write(registerAddress, data, Port.PortA, Bank.Bank1); 39 | } 40 | 41 | public void Write(Register.Address startingRegisterAddress, byte[] data) 42 | { 43 | Write(startingRegisterAddress, data, Port.PortA, Bank.Bank1); 44 | } 45 | } 46 | } 47 | -------------------------------------------------------------------------------- /rpitest/.vscode/launch.json: -------------------------------------------------------------------------------- 1 | { 2 | // Use IntelliSense to find out which attributes exist for C# debugging 3 | // Use hover for the description of the existing attributes 4 | // For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md 5 | "version": "0.2.0", 6 | "configurations": [ 7 | { 8 | "name": ".NET Core Launch (remote console)", 9 | "type": "coreclr", 10 | "request": "launch", 11 | "preLaunchTask": "publish", 12 | "program": "/home/pi/dotnet/dotnet", 13 | "args": ["/home/pi/Desktop/rpitest/rpitest.dll"], 14 | "cwd": "/home/pi/Desktop/rpitest", 15 | "stopAtEntry": false, 16 | "console": "internalConsole", 17 | "pipeTransport": { 18 | "pipeCwd": "${workspaceFolder}", 19 | "pipeProgram": "ssh.exe", 20 | "pipeArgs": [ 21 | "root@crowpi.lan" 22 | ], 23 | "debuggerPath": "/home/pi/vsdbg/vsdbg" 24 | } 25 | }, 26 | { 27 | "name": ".NET Core Launch (console)", 28 | "type": "coreclr", 29 | "request": "launch", 30 | "preLaunchTask": "build", 31 | // If you have changed target frameworks, make sure to update the program path. 32 | "program": "${workspaceFolder}/bin/Debug/netcoreapp2.2/rpitest.dll", 33 | "args": [], 34 | "cwd": "${workspaceFolder}", 35 | // For more information about the 'console' field, see https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md#console-terminal-window 36 | "console": "internalConsole", 37 | "stopAtEntry": false, 38 | "internalConsoleOptions": "openOnSessionStart" 39 | }, 40 | { 41 | "name": ".NET Core Attach", 42 | "type": "coreclr", 43 | "request": "attach", 44 | "processId": "${command:pickProcess}" 45 | } 46 | ,] 47 | } -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/Mcp23S09.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | using System.Device.Spi; 6 | 7 | namespace Iot.Device.Mcp23xxx 8 | { 9 | public class Mcp23S09 : Mcp23Sxx 10 | { 11 | ///

12 | /// Initializes new instance of Mcp23S09 device. 13 | /// A general purpose parallel I/O expansion for SPI applications. 14 | ///

15 | /// The device address for the connection on the SPI bus. 16 | /// SPI device used for communication. 17 | /// Output pin number that is connected to the hardware reset. 18 | /// Input pin number that is connected to the interrupt for Port A (INTA). 19 | /// Input pin number that is connected to the interrupt for Port B (INTB). 20 | public Mcp23S09(int deviceAddress, SpiDevice spiDevice, int? reset = null, int? interruptA = null, int? interruptB = null) 21 | : base(deviceAddress, spiDevice, reset, interruptA, interruptB) 22 | { 23 | } 24 | 25 | public override int PinCount => 8; 26 | 27 | public byte Read(Register.Address registerAddress) 28 | { 29 | return Read(registerAddress, Port.PortA, Bank.Bank1); 30 | } 31 | 32 | public byte[] Read(Register.Address startingRegisterAddress, byte byteCount) 33 | { 34 | return Read(startingRegisterAddress, byteCount, Port.PortA, Bank.Bank1); 35 | } 36 | 37 | public void Write(Register.Address registerAddress, byte data) 38 | { 39 | Write(registerAddress, data, Port.PortA, Bank.Bank1); 40 | } 41 | 42 | public void Write(Register.Address startingRegisterAddress, byte[] data) 43 | { 44 | Write(startingRegisterAddress, data, Port.PortA, Bank.Bank1); 45 | } 46 | } 47 | } 48 | -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/Mcp23S08.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | using System.Device.Spi; 6 | 7 | namespace Iot.Device.Mcp23xxx 8 | { 9 | public class Mcp23S08 : Mcp23Sxx 10 | { 11 | ///

12 | /// Initializes new instance of Mcp23S08 device. 13 | /// A general purpose parallel I/O expansion for I2C or SPI applications. 14 | ///

15 | /// The device address for the connection on the SPI bus. 16 | /// SPI device used for communication. 17 | /// Output pin number that is connected to the hardware reset. 18 | /// Input pin number that is connected to the interrupt for Port A (INTA). 19 | /// Input pin number that is connected to the interrupt for Port B (INTB). 20 | public Mcp23S08(int deviceAddress, SpiDevice spiDevice, int? reset = null, int? interruptA = null, int? interruptB = null) 21 | : base(deviceAddress, spiDevice, reset, interruptA, interruptB) 22 | { 23 | } 24 | 25 | public override int PinCount => 8; 26 | 27 | public byte Read(Register.Address registerAddress) 28 | { 29 | return Read(registerAddress, Port.PortA, Bank.Bank1); 30 | } 31 | 32 | public byte[] Read(Register.Address startingRegisterAddress, byte byteCount) 33 | { 34 | return Read(startingRegisterAddress, byteCount, Port.PortA, Bank.Bank1); 35 | } 36 | 37 | public void Write(Register.Address registerAddress, byte data) 38 | { 39 | Write(registerAddress, data, Port.PortA, Bank.Bank1); 40 | } 41 | 42 | public void Write(Register.Address startingRegisterAddress, byte[] data) 43 | { 44 | Write(startingRegisterAddress, data, Port.PortA, Bank.Bank1); 45 | } 46 | } 47 | } 48 | -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/Mcp230xx.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | using System.Device.I2c; 6 | 7 | namespace Iot.Device.Mcp23xxx 8 | { 9 | public abstract class Mcp230xx : Mcp23xxx 10 | { 11 | private readonly I2cDevice _i2cDevice; 12 | 13 | ///

14 | /// A general purpose parallel I/O expansion for I2C applications. 15 | ///

16 | /// I2C device used for communication. 17 | /// Output pin number that is connected to the hardware reset. 18 | /// Input pin number that is connected to the interrupt for Port A (INTA). 19 | /// Input pin number that is connected to the interrupt for Port B (INTB). 20 | public Mcp230xx(I2cDevice i2cDevice, int? reset = null, int? interruptA = null, int? interruptB = null) 21 | : base(i2cDevice.ConnectionSettings.DeviceAddress, reset, interruptA, interruptB) 22 | { 23 | _i2cDevice = i2cDevice; 24 | } 25 | 26 | public override byte[] Read(Register.Address startingRegisterAddress, byte byteCount, Port port = Port.PortA, Bank bank = Bank.Bank1) 27 | { 28 | Write(startingRegisterAddress, new byte[] { }, port, bank); // Set address to register first. 29 | 30 | byte[] readBuffer = new byte[byteCount]; 31 | _i2cDevice.Read(readBuffer); 32 | return readBuffer; 33 | } 34 | 35 | public override void Write(Register.Address startingRegisterAddress, byte[] data, Port port = Port.PortA, Bank bank = Bank.Bank1) 36 | { 37 | byte[] writeBuffer = new byte[data.Length + 1]; // Include Register Address. 38 | writeBuffer[0] = Register.GetMappedAddress(startingRegisterAddress, port, bank); 39 | data.CopyTo(writeBuffer, 1); 40 | _i2cDevice.Write(writeBuffer); 41 | } 42 | 43 | public override void Dispose() 44 | { 45 | _i2cDevice?.Dispose(); 46 | base.Dispose(); 47 | } 48 | } 49 | } 50 | -------------------------------------------------------------------------------- /LCDDisplay/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Device.Gpio; 3 | using System.Device.Gpio.Drivers; 4 | using System.Device.I2c; 5 | using System.Device.I2c.Drivers; 6 | using System.Threading; 7 | using Iot.Device.Lcm1602a1; 8 | using Iot.Device.Mcp23xxx; 9 | 10 | namespace LCDDisplay 11 | { 12 | class Program 13 | { 14 | static void Main(string[] args) 15 | { 16 | // int[] dataPins = { 12, 11, 10, 9 }; 17 | // int registerSelectPin = 15; 18 | // int enablePin = 13; 19 | // int readAndWritePin = 14; 20 | // DateTime xmas = new DateTime(2019, 12, 25); 21 | // CancellationTokenSource cts = new CancellationTokenSource(); 22 | // using (var lcd = new Lcm1602c(registerSelectPin, enablePin, dataPins)) 23 | // { 24 | // lcd.Clear(); //Clear in case there was a previous program that left some text on the screen 25 | // lcd.Begin(16, 2); //Initialize the lcd to use 2 rows, each with 16 characters. 26 | 27 | // lcd.Print("X-Mas Countdown"); //Print string on first row. 28 | 29 | // Console.CancelKeyPress += (o, e) => // Add handler for when the program should be terminated. 30 | // { 31 | // cts.Cancel(); 32 | // }; 33 | 34 | // while (!cts.Token.IsCancellationRequested) // Loop until Ctr-C is pressed. 35 | // { 36 | // lcd.SetCursor(0, 1); 37 | // TimeSpan countdown = xmas - DateTime.Now; 38 | // lcd.Print($""); 39 | // } 40 | // } 41 | 42 | Mcp23008 mcpDevice = new Mcp23008(new UnixI2cDevice(new I2cConnectionSettings(1, 0x21))); 43 | int[] dataPins = { 3, 4, 5, 6 }; 44 | int registerSelectPin = 1; 45 | int enablePin = 2; 46 | int backlightPin = 7; 47 | using (Lcm1602a1 lcd = new Lcm1602a1(mcpDevice, registerSelectPin, -1, enablePin, backlightPin, dataPins)) 48 | { 49 | lcd.Clear(); 50 | lcd.Begin(16, 2); 51 | 52 | lcd.Print("Hello World!"); 53 | lcd.SetCursor(0, 1); 54 | lcd.Print(".NET Core"); 55 | } 56 | } 57 | } 58 | } 59 | -------------------------------------------------------------------------------- /LCDDisplay/.vscode/launch.json: -------------------------------------------------------------------------------- 1 | { 2 | // Use IntelliSense to find out which attributes exist for C# debugging 3 | // Use hover for the description of the existing attributes 4 | // For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md 5 | "version": "0.2.0", 6 | "configurations": [ 7 | { 8 | "name": ".NET Core Launch (remote console)", 9 | "type": "coreclr", 10 | "request": "launch", 11 | "preLaunchTask": "publish", 12 | "program": "/home/pi/dotnet/dotnet", 13 | "args": [ 14 | "/home/pi/Desktop/LCDDisplay/LCDDisplay.dll" 15 | ], 16 | "cwd": "/home/pi/Desktop/LCDDisplay", 17 | "stopAtEntry": false, 18 | "console": "internalConsole", 19 | "pipeTransport": { 20 | "pipeCwd": "${workspaceFolder}", 21 | "pipeProgram": "ssh.exe", 22 | "pipeArgs": [ 23 | "root@crowpi.lan" 24 | ], 25 | "debuggerPath": "/home/pi/vsdbg/vsdbg" 26 | } 27 | //"pipeTransport": { 28 | // "pipeCwd": "${workspaceFolder}", 29 | // "pipeProgram": "${env:ChocolateyInstall}\\bin\\PLINK.EXE", 30 | // "pipeArgs": [ 31 | // "-pw", 32 | // "raspberry", 33 | // "root@crowpi.lan" 34 | // ], 35 | // "debuggerPath": "/home/pi/vsdbg/vsdbg" 36 | }, 37 | { 38 | "name": ".NET Core Launch (console)", 39 | "type": "coreclr", 40 | "request": "launch", 41 | "preLaunchTask": "build", 42 | // If you have changed target frameworks, make sure to update the program path. 43 | "program": "${workspaceFolder}/bin/Debug/netcoreapp2.2/LCDDisplay.dll", 44 | "args": [], 45 | "cwd": "${workspaceFolder}", 46 | // For more information about the 'console' field, see https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md#console-terminal-window 47 | "console": "internalConsole", 48 | "stopAtEntry": false, 49 | "internalConsoleOptions": "openOnSessionStart" 50 | }, 51 | { 52 | "name": ".NET Core Attach", 53 | "type": "coreclr", 54 | "request": "attach", 55 | "processId": "${command:pickProcess}" 56 | }, 57 | ] 58 | } -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/Mcp23Sxx.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | using System; 6 | using System.Device.Spi; 7 | 8 | namespace Iot.Device.Mcp23xxx 9 | { 10 | public abstract class Mcp23Sxx : Mcp23xxx 11 | { 12 | private readonly SpiDevice _spiDevice; 13 | 14 | ///

15 | /// A general purpose parallel I/O expansion for SPI applications. 16 | ///

17 | /// The device address for the connection on the SPI bus. 18 | /// SPI device used for communication. 19 | /// Output pin number that is connected to the hardware reset. 20 | /// Input pin number that is connected to the interrupt for Port A (INTA). 21 | /// Input pin number that is connected to the interrupt for Port B (INTB). 22 | public Mcp23Sxx(int deviceAddress, SpiDevice spiDevice, int? reset = null, int? interruptA = null, int? interruptB = null) 23 | : base(deviceAddress, reset, interruptA, interruptB) 24 | { 25 | _spiDevice = spiDevice; 26 | } 27 | 28 | public override byte[] Read(Register.Address startingRegisterAddress, byte byteCount, Port port = Port.PortA, Bank bank = Bank.Bank1) 29 | { 30 | byteCount += 2; // Include OpCode and Register Address. 31 | byte[] writeBuffer = new byte[byteCount]; 32 | writeBuffer[0] = OpCode.GetOpCode(DeviceAddress, true); 33 | writeBuffer[1] = Register.GetMappedAddress(startingRegisterAddress, port, bank); 34 | byte[] readBuffer = new byte[byteCount]; 35 | 36 | _spiDevice.TransferFullDuplex(writeBuffer, readBuffer); 37 | return readBuffer.AsSpan().Slice(2).ToArray(); // First 2 bytes are from sending OpCode and Register Address. 38 | } 39 | 40 | public override void Write(Register.Address startingRegisterAddress, byte[] data, Port port = Port.PortA, Bank bank = Bank.Bank1) 41 | { 42 | byte[] writeBuffer = new byte[data.Length + 2]; // Include OpCode and Register Address. 43 | writeBuffer[0] = OpCode.GetOpCode(DeviceAddress, false); 44 | writeBuffer[1] = Register.GetMappedAddress(startingRegisterAddress, port, bank); 45 | data.CopyTo(writeBuffer, 2); 46 | 47 | _spiDevice.Write(writeBuffer); 48 | } 49 | 50 | public override void Dispose() 51 | { 52 | _spiDevice?.Dispose(); 53 | base.Dispose(); 54 | } 55 | } 56 | } 57 | -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/Mcp23008.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | using System; 6 | using System.Device.Gpio; 7 | using System.Device.I2c; 8 | 9 | namespace Iot.Device.Mcp23xxx 10 | { 11 | public class Mcp23008 : Mcp230xx 12 | { 13 | private byte _iodir; 14 | private byte _gpio; 15 | 16 | ///

17 | /// Initializes new instance of Mcp23008 device. 18 | /// A general purpose parallel I/O expansion for I2C applications. 19 | ///

20 | /// I2C device used for communication. 21 | /// Output pin number that is connected to the hardware reset. 22 | /// Input pin number that is connected to the interrupt for Port A (INTA). 23 | /// Input pin number that is connected to the interrupt for Port B (INTB). 24 | public Mcp23008(I2cDevice i2cDevice, int? reset = null, int? interruptA = null, int? interruptB = null) 25 | : base(i2cDevice, reset, interruptA, interruptB) 26 | { 27 | _iodir = 0xFF; 28 | _gpio = 0x00; 29 | Write(Register.Address.IODIR, _iodir); 30 | Write(Register.Address.GPIO, _gpio); 31 | } 32 | 33 | public override int PinCount => 8; 34 | 35 | public byte Read(Register.Address registerAddress) 36 | { 37 | return Read(registerAddress, Port.PortA, Bank.Bank1); 38 | } 39 | 40 | public byte[] Read(Register.Address startingRegisterAddress, byte byteCount) 41 | { 42 | return Read(startingRegisterAddress, byteCount, Port.PortA, Bank.Bank1); 43 | } 44 | 45 | public void SetPinMode(int pinNumber, PinMode mode) 46 | { 47 | ValidateMode(mode); 48 | ValidatePin(pinNumber); 49 | 50 | switch (mode) 51 | { 52 | case PinMode.Input: 53 | _iodir |= (byte)(1 << (pinNumber % 8)); 54 | break; 55 | case PinMode.Output: 56 | _iodir &= (byte)(~(1 << (pinNumber % 8))); 57 | break; 58 | } 59 | 60 | Write(Register.Address.IODIR, _iodir); 61 | } 62 | 63 | public PinValue ReadPin(int pinNumber) 64 | { 65 | ValidatePin(pinNumber); 66 | 67 | _gpio = Read(Register.Address.GPIO); 68 | return ((_gpio & (1 << (pinNumber % 8))) > 0) ? PinValue.High : PinValue.Low; 69 | } 70 | 71 | public void WritePin(int pinNumber, PinValue value) 72 | { 73 | ValidatePin(pinNumber); 74 | 75 | switch (value) 76 | { 77 | case PinValue.High: 78 | _gpio |= (byte)(1 << (pinNumber % 8)); 79 | break; 80 | case PinValue.Low: 81 | _gpio &= (byte)(~(1 << (pinNumber % 8))); 82 | break; 83 | } 84 | Write(Register.Address.GPIO, _gpio); 85 | } 86 | 87 | private static void ValidateMode(PinMode mode) 88 | { 89 | if (mode != PinMode.Input && mode != PinMode.Output) 90 | { 91 | throw new ArgumentException("Mcp supports Input and Output modes only."); 92 | } 93 | } 94 | 95 | private void ValidatePin(int pinNumber) 96 | { 97 | if (pinNumber >= PinCount || pinNumber < 0) 98 | { 99 | throw new ArgumentOutOfRangeException($"{pinNumber} is not a valid pin on the Mcp controller."); 100 | } 101 | } 102 | 103 | public void Write(Register.Address registerAddress, byte data) 104 | { 105 | Write(registerAddress, data, Port.PortA, Bank.Bank1); 106 | } 107 | 108 | public void Write(Register.Address startingRegisterAddress, byte[] data) 109 | { 110 | Write(startingRegisterAddress, data, Port.PortA, Bank.Bank1); 111 | } 112 | } 113 | } 114 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | ## 4 | ## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore 5 | 6 | # User-specific files 7 | *.suo 8 | *.user 9 | *.userosscache 10 | *.sln.docstates 11 | 12 | # User-specific files (MonoDevelop/Xamarin Studio) 13 | *.userprefs 14 | 15 | # Build results 16 | [Dd]ebug/ 17 | [Dd]ebugPublic/ 18 | [Rr]elease/ 19 | [Rr]eleases/ 20 | x64/ 21 | x86/ 22 | bld/ 23 | [Bb]in/ 24 | [Oo]bj/ 25 | [Ll]og/ 26 | 27 | # Visual Studio 2015/2017 cache/options directory 28 | .vs/ 29 | # Uncomment if you have tasks that create the project's static files in wwwroot 30 | #wwwroot/ 31 | 32 | # Visual Studio 2017 auto generated files 33 | Generated\ Files/ 34 | 35 | # MSTest test Results 36 | [Tt]est[Rr]esult*/ 37 | [Bb]uild[Ll]og.* 38 | 39 | # NUNIT 40 | *.VisualState.xml 41 | TestResult.xml 42 | 43 | # Build Results of an ATL Project 44 | [Dd]ebugPS/ 45 | [Rr]eleasePS/ 46 | dlldata.c 47 | 48 | # Benchmark Results 49 | BenchmarkDotNet.Artifacts/ 50 | 51 | # .NET Core 52 | project.lock.json 53 | project.fragment.lock.json 54 | artifacts/ 55 | **/Properties/launchSettings.json 56 | 57 | # StyleCop 58 | StyleCopReport.xml 59 | 60 | # Files built by Visual Studio 61 | *_i.c 62 | *_p.c 63 | *_i.h 64 | *.ilk 65 | *.meta 66 | *.obj 67 | *.iobj 68 | *.pch 69 | *.pdb 70 | *.ipdb 71 | *.pgc 72 | *.pgd 73 | *.rsp 74 | *.sbr 75 | *.tlb 76 | *.tli 77 | *.tlh 78 | *.tmp 79 | *.tmp_proj 80 | *.log 81 | *.vspscc 82 | *.vssscc 83 | .builds 84 | *.pidb 85 | *.svclog 86 | *.scc 87 | 88 | # Chutzpah Test files 89 | _Chutzpah* 90 | 91 | # Visual C++ cache files 92 | ipch/ 93 | *.aps 94 | *.ncb 95 | *.opendb 96 | *.opensdf 97 | *.sdf 98 | *.cachefile 99 | *.VC.db 100 | *.VC.VC.opendb 101 | 102 | # Visual Studio profiler 103 | *.psess 104 | *.vsp 105 | *.vspx 106 | *.sap 107 | 108 | # Visual Studio Trace Files 109 | *.e2e 110 | 111 | # TFS 2012 Local Workspace 112 | $tf/ 113 | 114 | # Guidance Automation Toolkit 115 | *.gpState 116 | 117 | # ReSharper is a .NET coding add-in 118 | _ReSharper*/ 119 | *.[Rr]e[Ss]harper 120 | *.DotSettings.user 121 | 122 | # JustCode is a .NET coding add-in 123 | .JustCode 124 | 125 | # TeamCity is a build add-in 126 | _TeamCity* 127 | 128 | # DotCover is a Code Coverage Tool 129 | *.dotCover 130 | 131 | # AxoCover is a Code Coverage Tool 132 | .axoCover/* 133 | !.axoCover/settings.json 134 | 135 | # Visual Studio code coverage results 136 | *.coverage 137 | *.coveragexml 138 | 139 | # NCrunch 140 | _NCrunch_* 141 | .*crunch*.local.xml 142 | nCrunchTemp_* 143 | 144 | # MightyMoose 145 | *.mm.* 146 | AutoTest.Net/ 147 | 148 | # Web workbench (sass) 149 | .sass-cache/ 150 | 151 | # Installshield output folder 152 | [Ee]xpress/ 153 | 154 | # DocProject is a documentation generator add-in 155 | DocProject/buildhelp/ 156 | DocProject/Help/*.HxT 157 | DocProject/Help/*.HxC 158 | DocProject/Help/*.hhc 159 | DocProject/Help/*.hhk 160 | DocProject/Help/*.hhp 161 | DocProject/Help/Html2 162 | DocProject/Help/html 163 | 164 | # Click-Once directory 165 | publish/ 166 | 167 | # Publish Web Output 168 | *.[Pp]ublish.xml 169 | *.azurePubxml 170 | # Note: Comment the next line if you want to checkin your web deploy settings, 171 | # but database connection strings (with potential passwords) will be unencrypted 172 | *.pubxml 173 | *.publishproj 174 | 175 | # Microsoft Azure Web App publish settings. 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19 | /// A general purpose parallel I/O expansion for I2C or SPI applications. 20 | ///

21 | /// The device address for the connection on the I2C or SPI bus. 22 | /// Output pin number that is connected to the hardware reset. 23 | /// Input pin number that is connected to the interrupt for Port A (INTA). 24 | /// Input pin number that is connected to the interrupt for Port B (INTB). 25 | public Mcp23xxx(int deviceAddress, int? reset = null, int? interruptA = null, int? interruptB = null) 26 | { 27 | ValidateDeviceAddress(deviceAddress); 28 | 29 | DeviceAddress = deviceAddress; 30 | _reset = reset; 31 | _interruptA = interruptA; 32 | _interruptB = interruptB; 33 | 34 | InitializeMasterGpioController(); 35 | } 36 | 37 | internal static void ValidateBitNumber(int bitNumber) 38 | { 39 | if (bitNumber < 0 || bitNumber > 7) 40 | { 41 | throw new IndexOutOfRangeException("Invalid bit index."); 42 | } 43 | } 44 | 45 | internal static void ClearBit(ref byte data, int bitNumber) 46 | { 47 | ValidateBitNumber(bitNumber); 48 | data &= (byte)~(1 << bitNumber); 49 | } 50 | 51 | internal void SetBit(ref byte data, int bitNumber) 52 | { 53 | ValidateBitNumber(bitNumber); 54 | data |= (byte)(1 << bitNumber); 55 | } 56 | 57 | internal static bool GetBit(byte data, int bitNumber) 58 | { 59 | ValidateBitNumber(bitNumber); 60 | return ((data >> bitNumber) & 1) == 1; 61 | } 62 | 63 | private void ValidateDeviceAddress(int deviceAddress) 64 | { 65 | if (deviceAddress < 0x20 || deviceAddress > 0x27) 66 | { 67 | throw new ArgumentOutOfRangeException(nameof(deviceAddress), deviceAddress, "The Mcp23xxx address must be a value of 32 (0x20) - 39 (0x27)."); 68 | } 69 | } 70 | 71 | private void InitializeMasterGpioController() 72 | { 73 | // Only need master controller if there are external pins provided. 74 | if (_reset != null || _interruptA != null || _interruptB != null) 75 | { 76 | _masterGpioController = new GpioController(); 77 | 78 | if (_interruptA != null) 79 | { 80 | _masterGpioController.OpenPin((int)_interruptA, PinMode.Input); 81 | } 82 | 83 | if (_interruptB != null) 84 | { 85 | _masterGpioController.OpenPin((int)_interruptB, PinMode.Input); 86 | } 87 | 88 | if (_reset != null) 89 | { 90 | _masterGpioController.OpenPin((int)_reset, PinMode.Output); 91 | Disable(); 92 | } 93 | } 94 | } 95 | 96 | public abstract int PinCount { get; } 97 | 98 | public abstract byte[] Read(Register.Address startingRegisterAddress, byte byteCount, Port port = Port.PortA, Bank bank = Bank.Bank1); 99 | public abstract void Write(Register.Address startingRegisterAddress, byte[] data, Port port = Port.PortA, Bank bank = Bank.Bank1); 100 | 101 | public virtual void Dispose() 102 | { 103 | if (_masterGpioController != null) 104 | { 105 | _masterGpioController.Dispose(); 106 | _masterGpioController = null; 107 | } 108 | } 109 | 110 | public void Disable() 111 | { 112 | if (_masterGpioController == null) 113 | { 114 | throw new Exception("Master controller has not been initialized."); 115 | } 116 | 117 | if (_reset == null) 118 | { 119 | throw new Exception("Reset pin has not been initialized."); 120 | } 121 | 122 | _masterGpioController.Write((int)_reset, PinValue.Low); 123 | } 124 | 125 | public void Enable() 126 | { 127 | if (_masterGpioController == null) 128 | { 129 | throw new Exception("Master controller has not been initialized."); 130 | } 131 | 132 | if (_reset == null) 133 | { 134 | throw new Exception("Reset pin has not been initialized."); 135 | } 136 | 137 | _masterGpioController.Write((int)_reset, PinValue.High); 138 | } 139 | 140 | public byte Read(Register.Address registerAddress, Port port = Port.PortA, Bank bank = Bank.Bank1) 141 | { 142 | byte[] data = Read(registerAddress, 1, port, bank); 143 | return data[0]; 144 | } 145 | 146 | public bool ReadBit(Register.Address registerAddress, int bitNumber, Port port = Port.PortA, Bank bank = Bank.Bank1) 147 | { 148 | ValidateBitNumber(bitNumber); 149 | byte data = Read(registerAddress, port, bank); 150 | return GetBit(data, bitNumber); 151 | } 152 | 153 | ///

154 | /// Read the pin value of interrupt for Port A (INTA). 155 | ///

156 | /// Pin value of interrupt for Port A (INTA). 157 | public PinValue ReadInterruptA() 158 | { 159 | if (_masterGpioController == null) 160 | { 161 | throw new Exception("Master controller has not been initialized."); 162 | } 163 | 164 | if (_reset == null) 165 | { 166 | throw new Exception("INTA pin has not been initialized."); 167 | } 168 | 169 | return _masterGpioController.Read((int)_interruptA); 170 | } 171 | 172 | ///

173 | /// Read the pin value of interrupt for Port B (INTB). 174 | ///

175 | /// Pin value of interrupt for Port B (INTB). 176 | public PinValue ReadInterruptB() 177 | { 178 | if (_masterGpioController == null) 179 | { 180 | throw new Exception("Master controller has not been initialized."); 181 | } 182 | 183 | if (_reset == null) 184 | { 185 | throw new Exception("INTB pin has not been initialized."); 186 | } 187 | 188 | return _masterGpioController.Read((int)_interruptB); 189 | } 190 | 191 | public void Write(Register.Address registerAddress, byte data, Port port = Port.PortA, Bank bank = Bank.Bank1) 192 | { 193 | Write(registerAddress, new byte[] { data }, port, bank); 194 | } 195 | 196 | public void WriteBit(Register.Address registerAddress, int bitNumber, bool bit, Port port = Port.PortA, Bank bank = Bank.Bank1) 197 | { 198 | ValidateBitNumber(bitNumber); 199 | byte data = Read(registerAddress, port, bank); 200 | 201 | if (bit) 202 | { 203 | SetBit(ref data, bitNumber); 204 | } 205 | else 206 | { 207 | ClearBit(ref data, bitNumber); 208 | } 209 | 210 | Write(registerAddress, data, port, bank); 211 | } 212 | } 213 | } 214 | -------------------------------------------------------------------------------- /LCDDisplay/Mcp23xxx/Register.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | namespace Iot.Device.Mcp23xxx 6 | { 7 | public class Register 8 | { 9 | public enum Address 10 | { 11 | ///

12 | /// Controls the direction of the data I/O. 13 | /// When a bit is set, the corresponding pin becomes an input. 14 | /// When a bit is clear, the corresponding pin becomes an output. 15 | ///

16 | IODIR = 0b0000_0000, 17 | ///

18 | /// Configures the polarity on the corresponding GPIO port bits. 19 | /// When a bit is set, the corresponding GPIO register bit will reflect the inverted value on the pin. 20 | ///

21 | IPOL = 0b0000_0001, 22 | ///

23 | /// Controls the interrupt-on-change feature for each pin. 24 | /// When a bit is set, the corresponding pin is enabled for interrupt-on-change. 25 | /// The DEFVAL and INTCON registers must also be configured if any pins are enabled for interrupt-on-change. 26 | ///

27 | GPINTEN = 0b0000_0010, 28 | ///

29 | /// Configures the default comparison value. 30 | /// If enabled (via GPINTEN and INTCON) to compare against the DEFVAL register, 31 | /// an opposite value on the associated pin will cause an interrupt to occur. 32 | ///

33 | DEFVAL = 0b0000_0011, 34 | ///

35 | /// Controls how the associated pin value is compared for the interrupt-on-change feature. 36 | /// When a bit is set, the corresponding I/O pin is compared against the associated bit in the DEFVAL register. 37 | /// When a bit value is clear, the corresponding I/O pin is compared against the previous value. 38 | ///

39 | INTCON = 0b0000_0100, 40 | ///

41 | /// Contains several bits for configuring the device. See respective datasheet for more details. 42 | ///

43 | IOCON = 0b0000_0101, 44 | ///

45 | /// Controls the pull-up resistors for the port pins. 46 | /// When a bit is set and the corresponding pin is configured as an input, 47 | /// the corresponding port pin is internally pulled up with a 100 kΩ resistor. 48 | ///

49 | GPPU = 0b0000_0110, 50 | ///

51 | /// Reflects the interrupt condition on the port pins of any pin that is enabled for interrupts via the GPINTEN register. 52 | /// A 'set' bit indicates that the associated pin caused the interrupt. 53 | /// This register is read-only. Writes to this register will be ignored. 54 | ///

55 | INTF = 0b0000_0111, 56 | ///

57 | /// The INTCAP register captures the GPIO port value at the time the interrupt occurred. 58 | /// The register is read-only and is updated only when an interrupt occurs. 59 | /// The register will remain unchanged until the interrupt is cleared via a read of INTCAP or GPIO. 60 | ///

61 | INTCAP = 0b0000_1000, 62 | ///

63 | /// Reflects the value on the port. Reading from this register reads the port. 64 | /// Writing to this register modifies the Output Latch (OLAT) register. 65 | ///

66 | GPIO = 0b0000_1001, 67 | ///

68 | /// Provides access to the output latches. 69 | /// A read from this register results in a read of the OLAT and not the port itself. 70 | /// A write to this register modifies the output latches that modify the pins configured as outputs. 71 | ///

72 | OLAT = 0b0000_1010 73 | } 74 | 75 | public static byte GetMappedAddress(Address address, Port port = Port.PortA, Bank bank = Bank.Bank1) 76 | { 77 | byte mappedAddress; 78 | 79 | if (bank == Bank.Bank1) 80 | { 81 | mappedAddress = GetMappedAddressBank1(address, port); 82 | } 83 | else 84 | { 85 | mappedAddress = GetMappedAddressBank0(address, port); 86 | } 87 | 88 | return mappedAddress; 89 | } 90 | 91 | private static byte GetMappedAddressBank0(Address address, Port port) 92 | { 93 | byte mappedAddress; 94 | 95 | if (port == Port.PortA) 96 | { 97 | mappedAddress = GetMappedAddressBank0PortA(address); 98 | } 99 | else 100 | { 101 | mappedAddress = GetMappedAddressBank0PortB(address); 102 | } 103 | 104 | return mappedAddress; 105 | } 106 | 107 | private static byte GetMappedAddressBank0PortA(Address address) 108 | { 109 | byte mappedAddress = 0; 110 | 111 | switch (address) 112 | { 113 | case Address.IODIR: 114 | mappedAddress = 0b0000_0000; 115 | break; 116 | case Address.IPOL: 117 | mappedAddress = 0b0000_0010; 118 | break; 119 | case Address.GPINTEN: 120 | mappedAddress = 0b0000_0100; 121 | break; 122 | case Address.DEFVAL: 123 | mappedAddress = 0b0000_0110; 124 | break; 125 | case Address.INTCON: 126 | mappedAddress = 0b0000_1000; 127 | break; 128 | case Address.IOCON: 129 | mappedAddress = 0b0000_1010; 130 | break; 131 | case Address.GPPU: 132 | mappedAddress = 0b0000_1100; 133 | break; 134 | case Address.INTF: 135 | mappedAddress = 0b0000_1110; 136 | break; 137 | case Address.INTCAP: 138 | mappedAddress = 0b0001_0000; 139 | break; 140 | case Address.GPIO: 141 | mappedAddress = 0b0001_0010; 142 | break; 143 | case Address.OLAT: 144 | mappedAddress = 0b0001_0100; 145 | break; 146 | } 147 | 148 | return mappedAddress; 149 | } 150 | 151 | private static byte GetMappedAddressBank0PortB(Address address) 152 | { 153 | byte mappedAddress = 0; 154 | 155 | switch (address) 156 | { 157 | case Address.IODIR: 158 | mappedAddress = 0b0000_0001; 159 | break; 160 | case Address.IPOL: 161 | mappedAddress = 0b0000_0011; 162 | break; 163 | case Address.GPINTEN: 164 | mappedAddress = 0b0000_0101; 165 | break; 166 | case Address.DEFVAL: 167 | mappedAddress = 0b0000_0111; 168 | break; 169 | case Address.INTCON: 170 | mappedAddress = 0b0000_1001; 171 | break; 172 | case Address.IOCON: 173 | mappedAddress = 0b0000_1011; 174 | break; 175 | case Address.GPPU: 176 | mappedAddress = 0b0000_1101; 177 | break; 178 | case Address.INTF: 179 | mappedAddress = 0b0000_1111; 180 | break; 181 | case Address.INTCAP: 182 | mappedAddress = 0b0001_0001; 183 | break; 184 | case Address.GPIO: 185 | mappedAddress = 0b0001_0011; 186 | break; 187 | case Address.OLAT: 188 | mappedAddress = 0b0001_0101; 189 | break; 190 | } 191 | 192 | return mappedAddress; 193 | } 194 | 195 | private static byte GetMappedAddressBank1(Address address, Port port) 196 | { 197 | byte mappedAddress = (byte)address; 198 | 199 | if (port == Port.PortB) 200 | { 201 | mappedAddress |= 0b0001_0000; 202 | } 203 | 204 | return mappedAddress; 205 | } 206 | } 207 | } 208 | -------------------------------------------------------------------------------- /LCDDisplay/Lcm1602a1/Lcm1602a1.cs: -------------------------------------------------------------------------------- 1 | // Licensed to the .NET Foundation under one or more agreements. 2 | // The .NET Foundation licenses this file to you under the MIT license. 3 | // See the LICENSE file in the project root for more information. 4 | 5 | using System; 6 | using System.Device.Gpio; 7 | using System.Device.Gpio.Drivers; 8 | using System.Device.I2c; 9 | using System.Device.I2c.Drivers; 10 | using System.Diagnostics; 11 | using System.Runtime.CompilerServices; 12 | using System.Runtime.InteropServices; 13 | using Iot.Device.Mcp23xxx; 14 | 15 | namespace Iot.Device.Lcm1602a1 16 | { 17 | ///

18 | /// Supports Lcm1602c LCD controller. Ported from: https://github.com/adafruit/Adafruit_Python_CharLCD/blob/master/Adafruit_CharLCD/Adafruit_CharLCD.py 19 | ///

20 | public class Lcm1602a1 : IDisposable 21 | { 22 | // When the display powers up, it is configured as follows: 23 | // 24 | // 1. Display clear 25 | // 2. Function set: 26 | // DL = 1; 8-bit interface data 27 | // N = 0; 1-line display 28 | // F = 0; 5x8 dot character font 29 | // 3. Display on/off control: 30 | // D = 0; Display off 31 | // C = 0; Cursor off 32 | // B = 0; Blinking off 33 | // 4. Entry mode set: 34 | // I/D = 1; Increment by 1 35 | // S = 0; No shift 36 | // 37 | // Note, however, that resetting the device doesn't reset the LCD, so we 38 | // can't assume that its in that state when a sketch starts (and the 39 | // LiquidCrystal constructor is called). 40 | 41 | private readonly int _rsPin; // LOW: command. HIGH: character. 42 | private readonly int _rwPin; // LOW: write to LCD. HIGH: read from LCD. 43 | private readonly int _backlight; 44 | private readonly int _enablePin; // Activated by a HIGH pulse. 45 | private readonly int[] _dataPins; 46 | private readonly bool _usingMcp; 47 | 48 | private GpioController _controller; 49 | private readonly Mcp23008 _mcpController; 50 | 51 | private DisplayFlags _displayFunction; 52 | private DisplayFlags _displayControl; 53 | private DisplayFlags _displayMode; 54 | 55 | private byte _numLines; 56 | private readonly byte[] _rowOffsets; 57 | 58 | ///

59 | /// Initializes a new Lcm1602a1 display object without using a readWrite or backlight pin. 60 | /// This object will use the board's GPIO pins. 61 | ///

62 | /// The pin that controls the regsiter select. 63 | /// The pin that controls the enable switch. 64 | /// Collection of pins holding the data that will be printed on the screen. 65 | public Lcm1602a1(int registerSelect, int enable, int[] data) 66 | : this(registerSelect, -1, enable, -1, data) 67 | { 68 | // Do nothing 69 | } 70 | 71 | ///

72 | /// Initializes a new Lcm1602a1 display object. 73 | /// This object will use the board's GPIO pins. 74 | ///

75 | /// The pin that controls the regsiter select. 76 | /// The pin that controls the read and write switch. 77 | /// The pin that controls the enable switch. 78 | /// The pin that controls the backlight of the display. 79 | /// Collection of pins holding the data that will be printed on the screen. 80 | public Lcm1602a1(int registerSelect, int readWrite, int enable, int backlight, int[] data) 81 | : this (null, registerSelect, readWrite, enable, backlight, data) 82 | { 83 | // Do Nothing 84 | } 85 | 86 | ///

87 | /// Initializes a new Lcm1602a1 display object. 88 | /// This object will use the board's GPIO pins, or the McpController pins if one is provided. 89 | ///

90 | /// McpController that is used to provide the pins for the display. Null if we should use board's GPIO pins instead. 91 | /// The pin that controls the regsiter select. 92 | /// The pin that controls the read and write switch. 93 | /// The pin that controls the enable switch. 94 | /// The pin that controls the backlight of the display. 95 | /// Collection of pins holding the data that will be printed on the screen. 96 | public Lcm1602a1(Mcp23008 mcpController, int registerSelect, int readWrite, int enable, int backlight, int[] data) 97 | { 98 | _rwPin = readWrite; 99 | _rsPin = registerSelect; 100 | _enablePin = enable; 101 | _dataPins = data; 102 | _backlight = backlight; 103 | 104 | _rowOffsets = new byte[4]; 105 | 106 | _displayFunction = DisplayFlags.LCD_1LINE | DisplayFlags.LCD_5x8DOTS; 107 | 108 | if (data.Length == 4) 109 | { 110 | _displayFunction |= DisplayFlags.LCD_4BITMODE; 111 | } 112 | else if (data.Length == 8) 113 | { 114 | _displayFunction |= DisplayFlags.LCD_8BITMODE; 115 | } 116 | else 117 | { 118 | throw new ArgumentException($"The length of the array given to parameter {nameof(data)} must be 4 or 8"); 119 | } 120 | 121 | if (mcpController == null) 122 | { 123 | _controller = (RuntimeInformation.IsOSPlatform(OSPlatform.Linux)) ? 124 | new GpioController(PinNumberingScheme.Logical, new UnixDriver()) : 125 | new GpioController(PinNumberingScheme.Logical, new Windows10Driver()); 126 | _usingMcp = false; 127 | } 128 | else 129 | { 130 | _mcpController = mcpController; 131 | _usingMcp = true; 132 | } 133 | 134 | OpenPin(_rsPin, PinMode.Input); 135 | if (_rwPin != -1) 136 | { 137 | OpenPin(_rwPin, PinMode.Input); 138 | } 139 | if (_backlight != -1) 140 | { 141 | OpenPin(_backlight, PinMode.Input); 142 | } 143 | OpenPin(_enablePin, PinMode.Input); 144 | foreach (int i in _dataPins) 145 | OpenPin(i, PinMode.Input); 146 | // By default, initialize the display with one row and 16 characters. 147 | Begin(16, 1); 148 | } 149 | 150 | private void OpenPin(int pinNumber, PinMode mode) 151 | { 152 | if (_usingMcp) 153 | { 154 | _mcpController.SetPinMode(pinNumber, mode); 155 | } 156 | else 157 | { 158 | _controller.OpenPin(pinNumber, mode); 159 | } 160 | } 161 | 162 | private void SetPinMode(int pinNumber, PinMode mode) 163 | { 164 | if (_usingMcp) 165 | { 166 | _mcpController.SetPinMode(pinNumber, mode); 167 | } 168 | else 169 | { 170 | _controller.SetPinMode(pinNumber, mode); 171 | } 172 | } 173 | 174 | private void Write(int pinNumber, PinValue value) 175 | { 176 | if (_usingMcp) 177 | { 178 | _mcpController.WritePin(pinNumber, value); 179 | } 180 | else 181 | { 182 | _controller.Write(pinNumber, value); 183 | } 184 | } 185 | 186 | public void Dispose() 187 | { 188 | if (_controller != null) 189 | { 190 | _controller.Dispose(); 191 | _controller = null; 192 | } 193 | } 194 | 195 | public void Begin(byte cols, byte lines, DisplayFlags dotSize = DisplayFlags.LCD_5x8DOTS) 196 | { 197 | if (lines > 1) 198 | { 199 | _displayFunction |= DisplayFlags.LCD_2LINE; 200 | } 201 | 202 | _numLines = lines; 203 | 204 | SetRowOffsets(0x00, 0x40, 0x14, 0x54); 205 | 206 | // for some 1 line displays you can select a 10 pixel high font 207 | if ((dotSize != DisplayFlags.LCD_5x8DOTS) && (lines == 1)) 208 | { 209 | _displayFunction |= DisplayFlags.LCD_5x10DOTS; 210 | } 211 | 212 | _displayControl = DisplayFlags.LCD_DISPLAYON | DisplayFlags.LCD_CURSOROFF | DisplayFlags.LCD_BLINKOFF; 213 | _displayMode = DisplayFlags.LCD_ENTRYLEFT | DisplayFlags.LCD_ENTRYSHIFTDECREMENT; 214 | 215 | SetPinMode(_rsPin, PinMode.Output); 216 | // we can save 1 pin by not using RW. Indicate by passing null instead of a pin 217 | if (_rwPin != -1) 218 | { 219 | SetPinMode(_rwPin, PinMode.Output); 220 | } 221 | if (_backlight != -1) 222 | { 223 | SetPinMode(_backlight, PinMode.Output); 224 | Write(_backlight, PinValue.High); 225 | } 226 | SetPinMode(_enablePin, PinMode.Output); 227 | 228 | // Do this just once, instead of every time a character is drawn (for speed reasons). 229 | for (int i = 0; i < _dataPins.Length; ++i) 230 | { 231 | SetPinMode(_dataPins[i], PinMode.Output); 232 | } 233 | 234 | // SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION! 235 | // according to datasheet, we need at least 40ms after power rises above 2.7V 236 | // before sending commands. Arduino can turn on way before 4.5V so we'll wait 50 237 | DelayMicroseconds(50000); 238 | 239 | // Initialize the display. 240 | Write((byte)0x33); 241 | Write((byte)0x32); 242 | 243 | Write((byte)((byte)Commands.LCD_DISPLAYCONTROL| (byte)_displayControl)); 244 | Write((byte)((byte)Commands.LCD_FUNCTIONSET | (byte)_displayFunction)); 245 | Write((byte)((byte)Commands.LCD_ENTRYMODESET | (byte)_displayMode)); 246 | Clear(); 247 | } 248 | 249 | private void SetRowOffsets(byte row0, byte row1, byte row2, byte row3) 250 | { 251 | _rowOffsets[0] = row0; 252 | _rowOffsets[1] = row1; 253 | _rowOffsets[2] = row2; 254 | _rowOffsets[3] = row3; 255 | } 256 | 257 | #region High Level Surface Area 258 | public void Clear() 259 | { 260 | Command((byte)Commands.LCD_CLEARDISPLAY); // clear display, set cursor position to zero 261 | DelayMicroseconds(3000); // this command takes a long time! 262 | } 263 | 264 | public void Home() 265 | { 266 | Command((byte)Commands.LCD_RETURNHOME); // set cursor position to zero 267 | DelayMicroseconds(3000); // this command takes a long time! 268 | } 269 | 270 | public void SetCursor(byte col, byte row) 271 | { 272 | if (row >= _rowOffsets.Length) 273 | { 274 | row = (byte)(_rowOffsets.Length - 1); // we count rows starting w/0 275 | } 276 | if (row >= _numLines) 277 | { 278 | row = (byte)(_numLines - 1); // we count rows starting w/0 279 | } 280 | 281 | Command((byte)Commands.LCD_SETDDRAMADDR | (col + _rowOffsets[row])); 282 | } 283 | 284 | // Turn the display on/off (quickly) 285 | public void NoDisplay() 286 | { 287 | _displayControl &= ~DisplayFlags.LCD_DISPLAYON; 288 | Command((byte)Commands.LCD_DISPLAYCONTROL | (byte)_displayControl); 289 | } 290 | 291 | public void Display() 292 | { 293 | _displayControl |= DisplayFlags.LCD_DISPLAYON; 294 | Command((byte)Commands.LCD_DISPLAYCONTROL | (byte)_displayControl); 295 | } 296 | 297 | // Turns the underline cursor on/off 298 | public void NoCursor() 299 | { 300 | _displayControl &= ~DisplayFlags.LCD_CURSORON; 301 | Command((byte)Commands.LCD_DISPLAYCONTROL | (byte)_displayControl); 302 | } 303 | 304 | public void Cursor() 305 | { 306 | _displayControl |= DisplayFlags.LCD_CURSORON; 307 | Command((byte)Commands.LCD_DISPLAYCONTROL | (byte)_displayControl); 308 | } 309 | 310 | // Turn on and off the blinking cursor 311 | public void NoBlink() 312 | { 313 | _displayControl &= ~DisplayFlags.LCD_BLINKON; 314 | Command((byte)Commands.LCD_DISPLAYCONTROL | (byte)_displayControl); 315 | } 316 | 317 | public void Blink() 318 | { 319 | _displayControl |= DisplayFlags.LCD_BLINKON; 320 | Command((byte)Commands.LCD_DISPLAYCONTROL | (byte)_displayControl); 321 | } 322 | 323 | // These commands scroll the display without changing the RAM 324 | public void ScrollDisplayLeft() 325 | { 326 | Command((byte)Commands.LCD_CURSORSHIFT | (byte)DisplayFlags.LCD_DISPLAYMOVE | (byte)DisplayFlags.LCD_MOVELEFT); 327 | } 328 | 329 | public void ScrollDisplayRight() 330 | { 331 | Command((byte)Commands.LCD_CURSORSHIFT | (byte)DisplayFlags.LCD_DISPLAYMOVE | (byte)DisplayFlags.LCD_MOVERIGHT); 332 | } 333 | 334 | // This is for text that flows Left to Right 335 | public void LeftToRight() 336 | { 337 | _displayMode |= DisplayFlags.LCD_ENTRYLEFT; 338 | Command((byte)Commands.LCD_ENTRYMODESET | (byte)_displayMode); 339 | } 340 | 341 | // This is for text that flows Right to Left 342 | public void RightToLeft() 343 | { 344 | _displayMode &= ~DisplayFlags.LCD_ENTRYLEFT; 345 | Command((byte)Commands.LCD_ENTRYMODESET | (byte)_displayMode); 346 | } 347 | 348 | // This will 'right justify' text from the cursor 349 | public void Autoscroll() 350 | { 351 | _displayMode |= DisplayFlags.LCD_ENTRYSHIFTINCREMENT; 352 | Command((byte)Commands.LCD_ENTRYMODESET | (byte)_displayMode); 353 | } 354 | 355 | // This will 'left justify' text from the cursor 356 | public void NoAutoscroll() 357 | { 358 | _displayMode &= ~DisplayFlags.LCD_ENTRYSHIFTINCREMENT; 359 | Command((byte)Commands.LCD_ENTRYMODESET | (byte)_displayMode); 360 | } 361 | 362 | // Allows us to fill the first 8 CGRAM locations 363 | // with custom characters 364 | public void CreateChar(byte location, params byte[] charmap) 365 | { 366 | if (charmap.Length != 8) 367 | { 368 | throw new ArgumentException(nameof(charmap)); 369 | } 370 | 371 | location &= 0x7; // we only have 8 locations 0-7 372 | Command((byte)Commands.LCD_SETCGRAMADDR | (location << 3)); 373 | 374 | for (int i = 0; i < 8; i++) 375 | { 376 | Write(charmap[i]); 377 | } 378 | } 379 | 380 | public void BacklightOn() 381 | { 382 | if (_backlight != -1) 383 | { 384 | Write(_backlight, PinValue.High); 385 | } 386 | } 387 | 388 | public void BacklightOff() 389 | { 390 | if (_backlight != -1) 391 | { 392 | Write(_backlight, PinValue.Low); 393 | } 394 | } 395 | 396 | public void Print(string value) 397 | { 398 | for (int i = 0; i < value.Length; ++i) 399 | { 400 | Write(value[i]); 401 | } 402 | } 403 | #endregion // High Level Surface Area 404 | 405 | #region Mid Level Methods 406 | [MethodImpl(MethodImplOptions.AggressiveInlining)] 407 | private void Command(int value) 408 | { 409 | Command((byte)value); 410 | } 411 | 412 | [MethodImpl(MethodImplOptions.AggressiveInlining)] 413 | private void Command(byte value) 414 | { 415 | Send(value, PinValue.Low); 416 | } 417 | 418 | [MethodImpl(MethodImplOptions.AggressiveInlining)] 419 | private void Write(char value) 420 | { 421 | Write((byte)value); 422 | } 423 | 424 | [MethodImpl(MethodImplOptions.AggressiveInlining)] 425 | private void Write(byte value) 426 | { 427 | Send(value, PinValue.High); 428 | } 429 | #endregion // Mid Level Methods 430 | 431 | #region Low Level Methods 432 | // write either command or data, with automatic 4/8-bit selection 433 | private void Send(byte value, PinValue mode) 434 | { 435 | Write(_rsPin, mode); 436 | 437 | // if there is a RW pin indicated, set it low to Write 438 | if (_rwPin != -1) 439 | { 440 | Write(_rwPin, PinValue.Low); 441 | } 442 | 443 | if (_displayFunction.HasFlag(DisplayFlags.LCD_8BITMODE)) 444 | { 445 | Write8bits(value); 446 | } 447 | else 448 | { 449 | Write4bits((byte)(value >> 4)); 450 | Write4bits(value); 451 | } 452 | } 453 | 454 | private void PulseEnable() 455 | { 456 | Write(_enablePin, PinValue.Low); 457 | DelayMicroseconds(1); 458 | Write(_enablePin, PinValue.High); 459 | DelayMicroseconds(1); // enable pulse must be >450ns 460 | Write(_enablePin, PinValue.Low); 461 | DelayMicroseconds(100); // commands need > 37us to settle 462 | } 463 | 464 | private void Write4bits(byte value) 465 | { 466 | for (int i = 0; i < 4; i++) 467 | { 468 | DigitalWrite(_dataPins[i], ((value >> i) & 1)); 469 | } 470 | 471 | PulseEnable(); 472 | } 473 | 474 | private void Write8bits(byte value) 475 | { 476 | for (int i = 0; i < 8; i++) 477 | { 478 | DigitalWrite(_dataPins[i], ((value >> i) & 1)); 479 | } 480 | 481 | PulseEnable(); 482 | } 483 | 484 | [MethodImpl(MethodImplOptions.AggressiveInlining)] 485 | private void DigitalWrite(int pin, int value) 486 | { 487 | PinValue state = (value == 1) ? PinValue.High : PinValue.Low; 488 | Write(pin, state); 489 | } 490 | 491 | private static void DelayMicroseconds(int microseconds) 492 | { 493 | Stopwatch sw = Stopwatch.StartNew(); 494 | long v = (microseconds * System.Diagnostics.Stopwatch.Frequency) / 1000000; 495 | while (sw.ElapsedTicks < v) 496 | { 497 | // Do nothing 498 | } 499 | } 500 | #endregion // Low Level Methods 501 | } 502 | } 503 | --------------------------------------------------------------------------------