main.cpp

00001 /**
00002  *  New filename:   Main.cpp
00003  *  @filename   :   epd1in54-demo.ino
00004  *  @brief      :   1.54inch e-paper display demo
00005  *  @author     :   Yehui from Waveshare
00006  *
00007  *  Copyright (C) Waveshare     September 5 2017
00008  *
00009  * Permission is hereby granted, free of charge, to any person obtaining a copy
00010  * of this software and associated documnetation files (the "Software"), to deal
00011  * in the Software without restriction, including without limitation the rights
00012  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00013  * copies of the Software, and to permit persons to  whom the Software is
00014  * furished to do so, subject to the following conditions:
00015  *
00016  * The above copyright notice and this permission notice shall be included in
00017  * all copies or substantial portions of the Software.
00018  *
00019  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00020  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00021  * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00022  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00023  * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00024  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00025  * THE SOFTWARE.
00026  */
00027 
00028 // The 1.54 Incht E-paper Waveshare software is modified to work on a Kl25Z
00029 // epaper --------- KL25X
00030 // BUSY ----------- PTA13
00031 // RST ------------ PTA17
00032 // DC ------------- PTD5
00033 // CS ------------- PTD0
00034 // CLK ------------ PTD1
00035 // DIN ------------ PTD2
00036 // GND ------------ PTE3
00037 // 3.3V ----------- PTD9
00038 // NO connection with PTD3
00039 
00040 #include "mbed.h"
00041 #include "epd1in54.h"
00042 #include "epdpaint.h"
00043 #include "epdif.h"
00044 #include "imagedata.h"
00045 
00046 #define COLORED     0
00047 #define UNCOLORED   1
00048 
00049 Serial pc(USBTX, USBRX, 115200);
00050 
00051 DigitalOut reset_pin(PTA17);
00052 DigitalOut dc_pin(PTD5);
00053 DigitalOut cs_pin(PTD0);
00054 DigitalIn busy_pin(PTA13, PullNone);
00055 SPI epaper(PTD2,PTD3,PTD1);  //MOSI, MISO, CLK
00056 DigitalOut myled(LED2);
00057 Timer timer;
00058 
00059 /**
00060   * Due to RAM not enough in Arduino UNO, a frame buffer is not allowed.
00061   * In this case, a smaller image buffer is allocated and you have to
00062   * update a partial display several times.
00063   * 1 byte = 8 pixels, therefore you have to set 8*N pixels at a time.
00064   */
00065 unsigned char image[1024];
00066 Paint paint(image, 0, 0);    // width should be the multiple of 8
00067 Epd epd;
00068 unsigned long time_start_ms;
00069 unsigned long time_now_s;
00070 
00071 void setup()
00072 {
00073     // put your setup code here, to run once:
00074     if (epd.Init(lut_full_update) != 0) {
00075         pc.printf("e-Paper init failed !!!");
00076         return;
00077     }
00078 
00079     /**
00080      *  there are 2 memory areas embedded in the e-paper display
00081      *  and once the display is refreshed, the memory area will be auto-toggled,
00082      *  i.e. the next action of SetFrameMemory will set the other memory area
00083      *  therefore you have to clear the frame memory twice.
00084      */
00085 
00086     epd.ClearFrameMemory(0xFF);   // bit set = white, bit reset = black
00087     epd.DisplayFrame();
00088     epd.ClearFrameMemory(0xFF);   // bit set = white, bit reset = black
00089     epd.DisplayFrame();
00090 
00091     paint.SetRotate(ROTATE_0);
00092     paint.SetWidth(200);
00093     paint.SetHeight(24);
00094 
00095     /* For simplicity, the arguments are explicit numerical coordinates */
00096 
00097     paint.Clear(COLORED);
00098     paint.DrawStringAt(30, 4, "Hello world!", &Font16, UNCOLORED);
00099     epd.SetFrameMemory(paint.GetImage(), 0, 10, paint.GetWidth(), paint.GetHeight());
00100 
00101     paint.Clear(UNCOLORED);
00102     paint.DrawStringAt(30, 4, "e-Paper Demo", &Font16, COLORED);
00103     epd.SetFrameMemory(paint.GetImage(), 0, 30, paint.GetWidth(), paint.GetHeight());
00104 
00105     paint.SetWidth(64);
00106     paint.SetHeight(64);
00107 
00108     pc.printf("Rectangle \n\r");
00109     paint.Clear(UNCOLORED);
00110     paint.DrawRectangle(0, 0, 40, 50, COLORED);
00111     paint.DrawLine(0, 0, 40, 50, COLORED);
00112     paint.DrawLine(40, 0, 0, 50, COLORED);
00113     epd.SetFrameMemory(paint.GetImage(), 16, 60, paint.GetWidth(), paint.GetHeight());
00114 
00115     paint.Clear(UNCOLORED);
00116     paint.DrawCircle(32, 32, 30, COLORED);
00117     epd.SetFrameMemory(paint.GetImage(), 120, 60, paint.GetWidth(), paint.GetHeight());
00118 
00119     paint.Clear(UNCOLORED);
00120     paint.DrawFilledRectangle(0, 0, 40, 50, COLORED);
00121     epd.SetFrameMemory(paint.GetImage(), 16, 130, paint.GetWidth(), paint.GetHeight());
00122 
00123     paint.Clear(UNCOLORED);
00124     paint.DrawFilledCircle(32, 32, 30, COLORED);
00125     epd.SetFrameMemory(paint.GetImage(), 120, 130, paint.GetWidth(), paint.GetHeight());
00126     epd.DisplayFrame();
00127 
00128     wait_ms(2000);
00129 
00130     if (epd.Init(lut_partial_update) != 0) {
00131         pc.printf("e-Paper init failed");
00132         return;
00133     }
00134 
00135     /**
00136      *  there are 2 memory areas embedded in the e-paper display
00137      *  and once the display is refreshed, the memory area will be auto-toggled,
00138      *  i.e. the next action of SetFrameMemory will set the other memory area
00139      *  therefore you have to set the frame memory and refresh the display twice.
00140      */
00141     epd.SetFrameMemory(IMAGE_DATA);
00142     epd.DisplayFrame();
00143     epd.SetFrameMemory(IMAGE_DATA);
00144     epd.DisplayFrame();
00145 
00146     time_start_ms = timer.read_ms();
00147 }
00148 
00149 void loop()
00150 {
00151     // put your main code here, to run repeatedly:
00152     time_now_s = (timer.read_ms() - time_start_ms) / 1000;
00153     char time_string[] = {'0', '0', ':', '0', '0', '\0'};
00154     time_string[0] = time_now_s / 60 / 10 + '0';
00155     time_string[1] = time_now_s / 60 % 10 + '0';
00156     time_string[3] = time_now_s % 60 / 10 + '0';
00157     time_string[4] = time_now_s % 60 % 10 + '0';
00158 
00159     paint.SetWidth(32);
00160     paint.SetHeight(96);
00161     paint.SetRotate(ROTATE_270);
00162 
00163     paint.Clear(UNCOLORED);
00164     paint.DrawStringAt(0, 4, time_string, &Font24, COLORED);
00165     epd.SetFrameMemory(paint.GetImage(), 80, 72, paint.GetWidth(), paint.GetHeight());
00166     epd.DisplayFrame();
00167 }
00168 
00169 int main()
00170 {
00171     timer.start();
00172     pc.printf("\n\r\n\r\n\rWaveshare 1.54 inch e-Paper start\n\r");
00173     setup();
00174 
00175     while(1) {
00176         loop();
00177         myled = 1;
00178         wait(0.5);
00179         myled = 0;
00180         wait(0.5);
00181     }
00182 
00183 }
00184