jun imamura / epd1in54b

Library for Waveshare epd1in54b (1.54 inch ePaper black/red)

Dependents:   epd

e-Paper Module

Description

Waveshare 1.54 e-paper module imported from offiicial code https://www.waveshare.com/wiki/1.54inch_e-Paper_Module_(B) 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_20180211_022046.jpg

Example Code

include the mbed library with this snippet

#include "mbed.h"
#include "epd1in54b.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];
unsigned char frame_red[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);
    memset(frame_red, 0xFF, sizeof(unsigned char)*EPD_HEIGHT*EPD_WIDTH/8);

    Epd epd = Epd(mosi, miso, sclk, cs, dc, rst, busy);
    if (epd.Init() != 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_red, 10, 130, 50, 180, COLORED);
    epd.DrawFilledRectangle(frame_red, 0, 6, 200, 26, COLORED);
    epd.DrawFilledCircle(frame_red, 120, 150, 30, COLORED);

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

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

Diff: epdif.h

Revision:
0:cba3c1061231
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epdif.h	Sun Feb 11 01:34:23 2018 +0000
@@ -0,0 +1,59 @@
+/**
+ *  @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