jun imamura / epd1in54

WaveShare e-paper module (epd1in54). Monochrome version

e-Paper Module

Description

Waveshare 1.54 e-paper module imported from offiicial code https://www.waveshare.com/wiki/1.54inch_e-Paper_Module Codes are referenced from official Arduino code and Raspberry pi code.

SPI is used for communication between ePaper module and mbed.

Following shapes can be used:

  • primitive shape (square, circle, line)
  • font (variable sizes)

Pull request are appreciated (Note that the original code is copyrighted by (C) Waveshare )

Example Output

Display output with example code will be like following image:

/media/uploads/imachooon/img_20180216_223238.jpg

Example Code

include the mbed library with this snippet

#include "mbed.h"
#include "epd1in54.h"
#include "m41t62_rtc.h"
// Control
PinName rst;
PinName dc;
PinName busy;
// SPI communication
PinName mosi;
PinName miso;
PinName sclk;
PinName cs;

DigitalOut myled(LED1);

unsigned char frame_black[EPD_HEIGHT*EPD_WIDTH/8];


int main() {
    mosi = p5;
    miso = p6;
    sclk = p7;
    cs = p8;
    rst = p9;
    dc = p10;
    busy = p11;
    
    memset(frame_black, 0xFF, sizeof(unsigned char)*EPD_HEIGHT*EPD_WIDTH/8);

    Epd epd = Epd(mosi, miso, sclk, cs, dc, rst, busy);
    if (epd.Init(lut_full_update) != 0){
        return -1;
    }

    /* Draw something to the frame buffer */
    // For simplicity, the arguments are explicit numerical coordinates
    epd.DrawRectangle(frame_black, 10, 60, 50, 110, COLORED);
    epd.DrawLine(frame_black, 10, 60, 50, 110, COLORED);
    epd.DrawLine(frame_black, 50, 60, 10, 110, COLORED);
    epd.DrawCircle(frame_black, 120, 80, 30, COLORED);
    epd.DrawFilledRectangle(frame_black, 10, 130, 50, 180, COLORED);
    epd.DrawFilledRectangle(frame_black, 0, 6, 200, 26, COLORED);
    epd.DrawFilledCircle(frame_black, 120, 150, 30, COLORED);

    /*Write strings to the buffer */
    epd.DrawStringAt(frame_black, 30, 30, "e-Paper Demo", &Font16, COLORED);
    epd.DrawStringAt(frame_black, 28, 10, "Hello world!", &Font16, UNCOLORED);


    
    /* Display the frame_buffer */
    epd.SetFrameMemory(frame_black, 0, 0, epd.width, epd.height);
    epd.DisplayFrame();
    epd.Sleep();

    
    while(1) {
        myled = 1;
        wait(0.5);
        myled = 0;
        wait(0.5);
    }
}

epdif.h

Committer:
imachooon
Date:
2018-02-16
Revision:
0:ac97d71fe296

File content as of revision 0:ac97d71fe296:

/**
 *  @filename   :   epdif.h
 *  @brief      :   Header file of epdif.cpp providing EPD interface functions
 *                  Users have to implement all the functions in epdif.cpp
 *  @author     :   Yehui from Waveshare
 *
 *  Copyright (C) Waveshare     August 10 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.
 */

#ifndef EPDIF_H
#define EPDIF_H
#include "mbed.h"


#define SPI_
class EpdIf {
public:
    EpdIf(void);
    EpdIf(PinName mosi,
          PinName miso,
          PinName sclk, 
          PinName cs, 
          PinName dc, 
          PinName rst, 
          PinName busy);
    ~EpdIf(void);

    int  IfInit(void);
    static void DigitalWrite(DigitalOut* put, int value); 
    static int  DigitalRead(DigitalIn* pin);
    static void DelayMs(unsigned int delaytime);
    void SpiTransfer(unsigned char data);
    
    SPI* m_spi;
    DigitalOut* m_cs;
    DigitalOut* m_dc;
    DigitalOut* m_rst;
    DigitalIn*  m_busy;
};

#endif