jun imamura
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);
}
}