rflechner / RaspberryFsharp.Lcd5110

Using Nokia LCD 5110 on Raspberry Pi with Fsharp

RaspberryFsharp.Lcd5110

Install Mono and .NET Core 2

Follow instructions of Unosquare RaspberryIO documentation

Install libgdiplus

sudo apt-get install automake
sudo apt-get install libtool
sudo apt-get install libglib2.0-dev
sudo apt-get install libxrender-dev
sudo apt-get install libfontconfig1-dev
sudo apt-get install libpng12-dev
sudo apt-get install libgif-dev
sudo apt-get install libjpeg8-dev
sudo apt-get install libtiff5-dev
sudo apt-get install libexif-dev
sudo apt-get install gettext

Hardware

You can find a Nokia 5110 LCD on sparkfun or on hackspark.

Wiring with your Raspberry Pi

You can follow instructions of this article

Pin number	GPIO	LCD PIN
18	GPIO 24	RST
24	SPI_CE0	CE
16	GPIO 23	DC
19	SPI_MOSI	DIN
23	SPI_SCLK	CLK
1	VCC 3.3V (+)	VCC
11	GPIO 17	LIGHT
6	GND (-)	GND

OS Setup

You need to enable SPI. You can use sudo raspi-config as explained here

Code

I you followed the previous wiring instructions then you can use ScreenContext.Default to control your screen.

Display a Bitmap

Your bitmap must have a width of 84 pixels and a height of 48 pixels.

Color are not interpreted. If a pixel is not black, then it is displayed. Images are encoded with one bit per pixel. So a buffer of 504 bytes is sent to the screen.

Now we will display this bitmap.

Code is:

let logo = Bitmap.FromFile "logo2.bmp" :?> Bitmap
ScreenContext.Default
|> start (60uy, 4uy) // 60 is contrast, 4 is the bias
|> displayImage logo
|> ignore

Result is:

Display a text

let text = 
    { Text.From "FSharp works on Raspberry Pi !"
        with Font = new Font("Roboto", 10.f)
    }
ScreenContext.Default
|> start (60uy, 4uy) // 60 is contrast, 4 is the bias
|> displayText text
|> ignore

Example program is here

Run example

Build and publish

Solution 1

Build project with

cd RaspberryFsharp.Lcd5110.Sample
dotnet build
dotnet publish -r linux-arm

Upload manually.

Solution 2

You can also use sshdeploy like

dotnet sshdeploy push -w youpassword -h yourip

You also edit the project to store informations

I made a pull request to add support of FSharp project. I am now waiting for the new version a the NuGet

Run program on your Raspberry Pi

chmod +x RaspberryFsharp.Lcd5110.Sample
sudo ./RaspberryFsharp.Lcd5110.Sample