Waveshare 1.54 inch with nRF52

Updated on 16 December 2021

dev board Adafruit Feather Bluefruit

chip nRF52

chip Waveshare

features e-paper e-ink SPI

e-paper version 1

This tutorial is more than 1 year old. If the steps below do not work, then please check the latest versions and the documentations of the individual tools used.

Before starting

Dependancies

Ensure the following dependancies are downloaded and available:

Buy the components

Code

Download code waveshare-1in54-e-paper-nrf52.ino

#include <SPI.h>
#include "epd1in54.h"
#include "epdpaint.h"

#define COLORED     0
#define UNCOLORED   1

unsigned char image[1024];
Paint paint(image, 0, 0);
Epd epd;

void setup() {
  Serial.begin(9600);
  if (epd.Init(lut_full_update) != 0) {
      Serial.print("e-Paper init failed");
      return;
  }

  epd.ClearFrameMemory(0xFF);
  epd.DisplayFrame();
  epd.ClearFrameMemory(0xFF);
  epd.DisplayFrame();

  paint.SetRotate(ROTATE_0);
  paint.SetWidth(200);
  paint.SetHeight(24);

  paint.Clear(UNCOLORED);
  paint.DrawStringAt(10, 4, "Hello world!", &Font16, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 10, paint.GetWidth(), paint.GetHeight());

  paint.Clear(UNCOLORED);
  paint.DrawStringAt(10, 4, "e-Paper+nRF52", &Font16, COLORED);
  epd.SetFrameMemory(paint.GetImage(), 0, 30, paint.GetWidth(), paint.GetHeight());

  epd.DisplayFrame();

  delay(2000);
  epd.Sleep();
}

void loop() { }

Makefile

BOARD?=adafruit:nrf52:feather52832
PORT?=/dev/tty.SLAB_USBtoUART

.PHONY: default lint all flash clean

default: all flash clean

lint:
	cpplint --extensions=ino --filter=-legal/copyright *.ino

all:
	arduino-cli compile --fqbn $(BOARD) ./

flash:
	adafruit-nrfutil dfu genpkg --dev-type 0x0052 --application ./.*.hex dfu-package.zip
	adafruit-nrfutil dfu serial --package dfu-package.zip -p $(PORT) -b 115200

clean:
	rm -f .*.elf
	rm -f .*.hex
	rm -f *.zip

Prototype

A photo of the actual setup.

Schematic

Wire up the hardware accordingly

Description

The 4 non-SPI pins are defined in epdif.h file:

// Pin definition
#define RST_PIN         2   // A0
#define DC_PIN          3   // A1
#define CS_PIN          4   // A2
#define BUSY_PIN        5   // A3