e-paper-display/bcm2835-1.71/e-Paper/Arduino/epd2in7b/epd2in7b.ino

/**
 *  @filename   :   epd2in7b-demo.ino
 *  @brief      :   2.7inch e-paper display (B) demo
 *  @author     :   Yehui from Waveshare
 *
 *  Copyright (C) Waveshare     July 17 2017
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documnetation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to  whom the Software is
 * furished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <SPI.h>
#include "epd2in7b.h"
#include "imagedata.h"
#include "epdpaint.h"

#define COLORED     1
#define UNCOLORED   0

void setup() {
	// put your setup code here, to run once:
	Serial.begin(115200);
	Epd epd;

	Serial.print("e-Paper init and clear\r\n");
	if (epd.Init() != 0) {
		Serial.print("e-Paper init failed\r\n");
	return;
	}

	/* This clears the SRAM of the e-paper display */
	epd.ClearFrame();

	/**
	* Due to RAM not enough in Arduino UNO, a frame buffer is not allowed.
	* In this case, a smaller image buffer is allocated and you have to 
	* update a partial display several times.
	* 1 byte = 8 pixels, therefore you have to set 8*N pixels at a time.
	*/
	unsigned char image[1024];
	Paint paint(image, 176, 24);    //width should be the multiple of 8 

	paint.Clear(UNCOLORED);
	paint.DrawStringAt(0, 0, "e-Paper Demo", &Font16, COLORED);
	epd.TransmitPartialBlack(paint.GetImage(), 16, 32, paint.GetWidth(), paint.GetHeight());

	paint.Clear(COLORED);
	paint.DrawStringAt(2, 2, "Hello world!", &Font20, UNCOLORED);
	epd.TransmitPartialRed(paint.GetImage(), 0, 64, 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.TransmitPartialBlack(paint.GetImage(), 10, 130, paint.GetWidth(), paint.GetHeight());

	paint.Clear(UNCOLORED);
	paint.DrawCircle(32, 32, 30, COLORED);
	epd.TransmitPartialBlack(paint.GetImage(), 90, 120, paint.GetWidth(), paint.GetHeight());

	paint.Clear(UNCOLORED);
	paint.DrawFilledRectangle(0, 0, 40, 50, COLORED);
	epd.TransmitPartialRed(paint.GetImage(), 10, 200, paint.GetWidth(), paint.GetHeight());

	paint.Clear(UNCOLORED);
	paint.DrawFilledCircle(32, 32, 30, COLORED);
	epd.TransmitPartialRed(paint.GetImage(), 90, 190, paint.GetWidth(), paint.GetHeight());

	/* This displays the data from the SRAM in e-Paper module */
	Serial.print("show paint.image\r\n");
	epd.DisplayFrame();

	/* This displays an image */
	Serial.print("show array\r\n");
	epd.DisplayFrame(IMAGE_BLACK, IMAGE_RED);

	/* Deep sleep */
	Serial.print("sleep\r\n");
	epd.Sleep();
}

void loop() {
  // put your main code here, to run repeatedly:

}