Waveshare 1.54 inch V2.1 with Arduino Zero

#include <SPI.h>
#include "epd1in54_V2.h"
#include "imagedata.h"
#include "epdpaint.h"
#include <stdio.h>

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

unsigned long time_start_ms;
unsigned long time_now_s;
#define COLORED     0
#define UNCOLORED   1

void setup() {
  SerialUSB.begin(9600);
  while (!SerialUSB) { }
  SerialUSB.println("e-Paper init and clear!");

  epd.LDirInit();
  epd.Clear();

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

  SerialUSB.println("e-Paper paint");
  paint.Clear(COLORED);
  paint.DrawStringAt(30, 4, "Hello world!!", &Font16, UNCOLORED);
  epd.SetFrameMemory(
    paint.GetImage(), 0, 10, paint.GetWidth(), paint.GetHeight());

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

  paint.SetWidth(64);
  paint.SetHeight(64);

  paint.Clear(UNCOLORED);
  paint.DrawRectangle(0, 0, 40, 50, COLORED);
  paint.DrawLine(0, 0, 40, 50, COLORED);
  paint.DrawLine(40, 0, 0, 50, COLORED);
  epd.SetFrameMemory(
    paint.GetImage(), 16, 60, paint.GetWidth(), paint.GetHeight());

  paint.Clear(UNCOLORED);
  paint.DrawCircle(32, 32, 30, COLORED);
  epd.SetFrameMemory(
    paint.GetImage(), 120, 60, paint.GetWidth(), paint.GetHeight());

  paint.Clear(UNCOLORED);
  paint.DrawFilledRectangle(0, 0, 40, 50, COLORED);
  epd.SetFrameMemory(
    paint.GetImage(), 16, 130, paint.GetWidth(), paint.GetHeight());

  paint.Clear(UNCOLORED);
  paint.DrawFilledCircle(32, 32, 30, COLORED);
  epd.SetFrameMemory(
    paint.GetImage(), 120, 130, paint.GetWidth(), paint.GetHeight());
  epd.DisplayFrame();
  delay(2000);

  SerialUSB.println("e-Paper show pic");
  epd.HDirInit();

  // Part display
  epd.HDirInit();
  epd.DisplayPartBaseImage(IMAGE_DATA);

  paint.SetWidth(50);
  paint.SetHeight(60);
  paint.Clear(UNCOLORED);

  char i = 0;
  char str[10][10] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9"};
  for (i = 0; i < 10; i++) {
    paint.Clear(UNCOLORED);
    paint.DrawStringAt(10, 10, str[i], &Font24, COLORED);
    epd.SetFrameMemoryPartial(
      paint.GetImage(), 80, 70, paint.GetWidth(), paint.GetHeight());
    epd.DisplayPartFrame();
    delay(100);
  }

  SerialUSB.println("e-Paper clear and goto sleep");
  epd.HDirInit();
  epd.Clear();
  epd.Sleep();
}

void loop() { }

BOARD?=arduino:samd:mzero_bl
PORT := $(shell ls /dev/cu.usbmodem*)

.PHONY: default all flash clean

default: all flash clean

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

flash:
	arduino-cli upload -p $(PORT) --fqbn $(BOARD) --verbose

clean:
	rm -r build