Library for Waveshare epd1in54b (1.54 inch ePaper black/red)
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:
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); } }
epdif.cpp
- Committer:
- imachooon
- Date:
- 2018-02-11
- Revision:
- 0:cba3c1061231
File content as of revision 0:cba3c1061231:
/** * @filename : epdif.cpp * @brief : Implements 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. */ #include "epdif.h" EpdIf::EpdIf(){ } EpdIf::EpdIf(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName dc, PinName rst, PinName busy) { m_spi = new SPI(mosi, miso, sclk); m_cs = new DigitalOut(cs); m_dc = new DigitalOut(dc); m_rst = new DigitalOut(rst); m_busy = new DigitalIn(busy); } EpdIf::~EpdIf() { } void EpdIf::DigitalWrite(DigitalOut* pout, int value) { *pout = value; } int EpdIf::DigitalRead(DigitalIn* pin) { int ret = *pin; return ret; } void EpdIf::DelayMs(unsigned int delaytime) { wait_ms(delaytime); } void EpdIf::SpiTransfer(unsigned char data) { *m_cs = 0; m_spi->write(data); *m_cs = 1; } int EpdIf::IfInit(void){ m_spi->format(8,0); m_spi->frequency(2000000); return 0; }