PCD8544

Kaluma library for PCD8544, a.k.a Nokia 5110 (Monochrome LCD Display)

You can get Nokia 5110 LCD displays from belows:

Nokia 5110 LCD (from Adafruit)

Wiring

Here is a wiring example for SPI0.

Raspberry Pi Pico	PCD8544 (Nokia 5110)
3V3	VCC
GND	GND
GP19 (SPI0 TX)	DIN
GP18 (SPI0 CLK)	CLK
GP20	DC
GP21	RST
GP17	CE (CS)
GP22	BL (LED)

Install

npm i https://github.com/niklauslee/pcd8544

Usage

You can initialize PCD8544 driver using SPI interface as below:

const {PCD8544} = require('pcd8544');
const pcd8544 = new PCD8544();

pcd8544.setup(board.spi(0), {dc: 20, cs: 17, rst: 21, bl: 22});
const gc = pcd8544.getContext();
// Use Graphics APIs
// gc.drawRect(0, 0, width, height);
// gc.display();

API

Class: PCD8544

A class for PCD8544 driver communicating with SPI interface.

new PCD8544()

Create an instance of PCD8544 driver.

pcd8544.setup(spi[, options])

spi <SPI> An instance of SPI to communicate.
options <object> Options for initialization.
- dc <number> Pin number for DC. Default -1.
- cs <number> Pin number for CS. Default -1.
- rst <number> Pin number for RST. Default -1.
- bl <number> Pin number for BL (Backlight). Default -1.
- bias <number> Bias value. Default 0x04.
- contrast <number> Contrast value. Default 0x3F.
- rotation <number> Rotation of screen. One of 0 (0 degree), 1 (90 degree in clockwise), 2 (180 degree in clockwise), and 3 (270 degree in clockwise). Default: 0.

Setup PCD8544 driver for a given SPI bus and options.

pcd8544.getContext()

Returns: <BufferedGraphicsContext> An instance of buffered graphic context for PCD8544.

pcd8544.setBias(bias)

bias <number> Bias value.

Set bias of the display.

pcd8544.setContrast(contrast)

contrast <number> Contrast value.

Set contrast of the display.

pcd8544.setBacklight(value)

value <number> HIGH or LOW.

Turn on/off the backlight.

Examples

example.js (84x48 resolution)

niklauslee / pcd8544