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/**
* @filename : epd3in7.cpp
* @brief : Implements for e-paper library
* @author : Waveshare
*
* Copyright (C) Waveshare July 17 2020
*
* 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 <stdlib.h>
#include "epd3in7.h"
#include "imagedata.h"
static const UBYTE lut_4Gray_GC[] =
{
0x2A,0x06,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
0x28,0x06,0x14,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//2
0x20,0x06,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
0x14,0x06,0x28,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//4
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
0x00,0x02,0x02,0x0A,0x00,0x00,0x00,0x08,0x08,0x02,//6
0x00,0x02,0x02,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,//7
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//8
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//10
0x22,0x22,0x22,0x22,0x22
};
static const UBYTE lut_1Gray_GC[] =
{
0x2A,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
0x05,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//2
0x2A,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
0x05,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//4
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
0x00,0x02,0x03,0x0A,0x00,0x02,0x06,0x0A,0x05,0x00,//6
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//7
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//8
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//10
0x22,0x22,0x22,0x22,0x22
};
static const UBYTE lut_1Gray_DU[] =
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
0x01,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x0A,0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
0x00,0x00,0x05,0x05,0x00,0x05,0x03,0x05,0x05,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//7
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x22,0x22,0x22,0x22,0x22
};
Epd::~Epd() {
};
Epd::Epd() {
reset_pin = RST_PIN;
dc_pin = DC_PIN;
cs_pin = CS_PIN;
busy_pin = BUSY_PIN;
width = EPD_WIDTH;
height = EPD_HEIGHT;
};
int Epd::Init(void) {
if (IfInit() != 0) {
return -1;
}
Reset();
SendCommand(0x12);
DelayMs(300);
SendCommand(0x46);
SendData(0xF7);
WaitUntilIdle();
SendCommand(0x47);
SendData(0xF7);
WaitUntilIdle();
SendCommand(0x01); // setting gaet number
SendData(0xDF);
SendData(0x01);
SendData(0x00);
SendCommand(0x03); // set gate voltage
SendData(0x00);
SendCommand(0x04); // set source voltage
SendData(0x41);
SendData(0xA8);
SendData(0x32);
SendCommand(0x11); // set data entry sequence
SendData(0x03);
SendCommand(0x3C); // set border
SendData(0x00);
SendCommand(0x0C); // set booster strength
SendData(0xAE);
SendData(0xC7);
SendData(0xC3);
SendData(0xC0);
SendData(0xC0);
SendCommand(0x18); // set internal sensor on
SendData(0x80);
SendCommand(0x2C); // set vcom value
SendData(0x44);
SendCommand(0x37); // set display option, these setting turn on previous function
SendData(0x00);
SendData(0xff);
SendData(0xff);
SendData(0xff);
SendData(0xff);
SendData(0x4f);
SendData(0xff);
SendData(0xff);
SendData(0xff);
SendData(0xff);
SendCommand(0x44); // setting X direction start/end position of RAM
SendData(0x00);
SendData(0x00);
SendData(0x17);
SendData(0x01);
SendCommand(0x45); // setting Y direction start/end position of RAM
SendData(0x00);
SendData(0x00);
SendData(0xDF);
SendData(0x01);
SendCommand(0x22); // Display Update Control 2
SendData(0xCF);
return 0;
}
/**
* @brief: basic function for sending commands
*/
void Epd::SendCommand(unsigned char command) {
DigitalWrite(dc_pin, LOW);
SpiTransfer(command);
}
/**
* @brief: basic function for sending data
*/
void Epd::SendData(unsigned char data) {
DigitalWrite(dc_pin, HIGH);
SpiTransfer(data);
}
/**
* @brief: Wait until the busy_pin goes HIGH
*/
void Epd::WaitUntilIdle(void) {
Serial.print("e-Paper busy \r\n ");
UBYTE busy;
do
{
busy = DigitalRead(busy_pin);
}
while(busy);
DelayMs(200);
Serial.print("e-Paper busy release \r\n ");
}
/**
* @brief: module reset.
* often used to awaken the module in deep sleep,
* see Epd::Sleep();
*/
void Epd::Reset(void) {
DigitalWrite(reset_pin, LOW); //module reset
DelayMs(1);
DigitalWrite(reset_pin, HIGH);
DelayMs(200);
}
/******************************************************************************
function : Display
******************************************************************************/
void Epd::DisplayFrame(const UBYTE *Image) {
UWORD i;
UWORD IMAGE_COUNTER = width * height / 8;
SendCommand(0x4E);
SendData(0x00);
SendData(0x00);
SendCommand(0x4F);
SendData(0x00);
SendData(0x00);
SendCommand(0x24);
for (i = 0; i < IMAGE_COUNTER; i++)
{
SendData(pgm_read_byte(&Image[i]));
}
Load_LUT(1);
SendCommand(0x20);
WaitUntilIdle();
}
/******************************************************************************
function : Partial Display
******************************************************************************/
void Epd::DisplayFrame_Partial(const UBYTE *Image, UWORD Xstart, UWORD Ystart, UWORD iwidth, UWORD iheight) {
UWORD i, j;
SendCommand(0x4E);
SendData(0x00);
SendData(0x00);
SendCommand(0x4F);
SendData(0x00);
SendData(0x00);
SendCommand(0x24);
for(i=0; i<EPD_WIDTH; i++) {
for(j=0; j<EPD_HEIGHT/8; j++) {
if(i>=Ystart && i<Ystart+iheight && j>=Xstart/8 && j<(Xstart+iwidth)/8)
SendData(Image[(j-Xstart/8) + (i-Ystart)*iwidth/8]);
else
SendData(0xff);
}
}
Load_LUT(0);
SendCommand(0x20);
WaitUntilIdle();
}
/******************************************************************************
function : set the look-up tables
parameter:
******************************************************************************/
void Epd::Load_LUT(UBYTE mode) {
UWORD i;
SendCommand(0x32);
for (i = 0; i < 105; i++) {
if(mode == 1)
SendData(lut_1Gray_GC[i]);
else if(mode == 0)
SendData(lut_1Gray_DU[i]);
}
}
/******************************************************************************
function : Clear Screen
parameter:
mode: 0:just partial mode
1:clear all
******************************************************************************/
void Epd::Clear(UBYTE mode) {
UWORD i;
UWORD IMAGE_COUNTER = width * height / 8;
SendCommand(0x4E);
SendData(0x00);
SendData(0x00);
SendCommand(0x4F);
SendData(0x00);
SendData(0x00);
SendCommand(0x24);
for (i = 0; i < IMAGE_COUNTER; i++)
{
SendData(0xff);
}
if(mode)
Load_LUT(1);
else
Load_LUT(0);
SendCommand(0x20);
WaitUntilIdle();
}
/**
* @brief: After this command is transmitted, the chip would enter the
* deep-sleep mode to save power.
* The deep sleep mode would return to standby by hardware reset.
* The only one parameter is a check code, the command would be
* You can use EPD_Reset() to awaken
*/
void Epd::Sleep(void) {
SendCommand(0X50);
SendData(0xf7);
SendCommand(0X02); //power off
SendCommand(0X07); //deep sleep
SendData(0xA5);
}
/* END OF FILE */

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Arduino/epd3in7/epd3in7.h Normal file
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/**
* @filename : epd3in7.h
* @brief : Header file for e-paper library epd3in7.cpp
* @author : Waveshare
*
* Copyright (C) Waveshare July 17 2020
*
* 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 EPD3IN7_H
#define EPD3IN7_H
#include "epdif.h"
// Display resolution
#define EPD_WIDTH 480
#define EPD_HEIGHT 280
#define UWORD unsigned int
#define UBYTE unsigned char
#define UDOUBLE unsigned long
class Epd : EpdIf {
public:
Epd();
~Epd();
int Init(void);
void WaitUntilIdle(void);
void Reset(void);
void DisplayFrame(const UBYTE *Image);
void SendCommand(unsigned char command);
void DisplayFrame_Partial(const UBYTE *Image, UWORD Xstart, UWORD Ystart, UWORD iwidth, UWORD iheight);
void SendData(unsigned char data);
void Sleep(void);
void Clear(UBYTE mode);
void Load_LUT(UBYTE mode);
private:
unsigned int reset_pin;
unsigned int dc_pin;
unsigned int cs_pin;
unsigned int busy_pin;
unsigned long width;
unsigned long height;
};
#endif /* EPD3IN7_H */
/* END OF FILE */

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/**
@filename : epd3in7-demo.ino
@brief : 3.7inch e-paper display demo
@author : Waveshare
Copyright (C) Waveshare July 17 2020
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 <SPI.h>
#include "epd3in7.h"
#include "imagedata.h"
#include "epdpaint.h"
#define COLORED 0
#define UNCOLORED 1
UBYTE image[800];
Paint paint(image, 0, 0); // width should be the multiple of 8
UDOUBLE time_start_ms;
UDOUBLE time_now_s;
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
Epd epd;
if (epd.Init() != 0) {
Serial.print("e-Paper init failed");
return;
}
Serial.print("3.7inch e-paper demo\r\n ");
Serial.print("e-Paper Clear\r\n ");
epd.Clear(1);
Serial.print("draw image\r\n ");
epd.DisplayFrame(IMAGE_DATA);
delay(4000);
epd.Clear(0);
UBYTE i;
time_start_ms = millis();
for(i=0; i<10; i++) {
time_now_s = (millis() - time_start_ms) / 1000;
char time_string[] = {'0', '0', ':', '0', '0', '\0'};
time_string[0] = time_now_s / 60 / 10 + '0';
time_string[1] = time_now_s / 60 % 10 + '0';
time_string[3] = time_now_s % 60 / 10 + '0';
time_string[4] = time_now_s % 60 % 10 + '0';
paint.SetWidth(48);
paint.SetHeight(100);
paint.SetRotate(ROTATE_270);
paint.Clear(UNCOLORED);
paint.DrawStringAt(20, 10, time_string, &Font16, COLORED);
Serial.print("refresh------\r\n ");
epd.DisplayFrame_Partial(paint.GetImage(), 20, 100, 48, 100);
}
Serial.print("clear and sleep......\r\n ");
epd.Clear(1);
epd.Sleep();
}
void loop() {
// put your main code here, to run repeatedly:
}

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/**
* @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"
#include <spi.h>
EpdIf::EpdIf() {
};
EpdIf::~EpdIf() {
};
void EpdIf::DigitalWrite(int pin, int value) {
digitalWrite(pin, value);
}
int EpdIf::DigitalRead(int pin) {
return digitalRead(pin);
}
void EpdIf::DelayMs(unsigned int delaytime) {
delay(delaytime);
}
void EpdIf::SpiTransfer(unsigned char data) {
digitalWrite(CS_PIN, LOW);
SPI.transfer(data);
digitalWrite(CS_PIN, HIGH);
}
int EpdIf::IfInit(void) {
pinMode(CS_PIN, OUTPUT);
pinMode(RST_PIN, OUTPUT);
pinMode(DC_PIN, OUTPUT);
pinMode(BUSY_PIN, INPUT);
SPI.begin();
SPI.beginTransaction(SPISettings(2000000, MSBFIRST, SPI_MODE0));
return 0;
}

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/**
* @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 <arduino.h>
// Pin definition
#define RST_PIN 8
#define DC_PIN 9
#define CS_PIN 10
#define BUSY_PIN 7
class EpdIf {
public:
EpdIf(void);
~EpdIf(void);
static int IfInit(void);
static void DigitalWrite(int pin, int value);
static int DigitalRead(int pin);
static void DelayMs(unsigned int delaytime);
static void SpiTransfer(unsigned char data);
};
#endif

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/**
* @filename : epdpaint.cpp
* @brief : Paint tools
* @author : Yehui from Waveshare
*
* Copyright (C) Waveshare September 9 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 <avr/pgmspace.h>
#include "epdpaint.h"
Paint::Paint(unsigned char* image, int width, int height) {
this->rotate = ROTATE_0;
this->image = image;
/* 1 byte = 8 pixels, so the width should be the multiple of 8 */
this->width = width % 8 ? width + 8 - (width % 8) : width;
this->height = height;
}
Paint::~Paint() {
}
/**
* @brief: clear the image
*/
void Paint::Clear(int colored) {
for (int x = 0; x < this->width; x++) {
for (int y = 0; y < this->height; y++) {
DrawAbsolutePixel(x, y, colored);
}
}
}
/**
* @brief: this draws a pixel by absolute coordinates.
* this function won't be affected by the rotate parameter.
*/
void Paint::DrawAbsolutePixel(int x, int y, int colored) {
if (x < 0 || x >= this->width || y < 0 || y >= this->height) {
return;
}
if (IF_INVERT_COLOR) {
if (colored) {
image[(x + y * this->width) / 8] |= 0x80 >> (x % 8);
} else {
image[(x + y * this->width) / 8] &= ~(0x80 >> (x % 8));
}
} else {
if (colored) {
image[(x + y * this->width) / 8] &= ~(0x80 >> (x % 8));
} else {
image[(x + y * this->width) / 8] |= 0x80 >> (x % 8);
}
}
}
/**
* @brief: Getters and Setters
*/
unsigned char* Paint::GetImage(void) {
return this->image;
}
int Paint::GetWidth(void) {
return this->width;
}
void Paint::SetWidth(int width) {
this->width = width % 8 ? width + 8 - (width % 8) : width;
}
int Paint::GetHeight(void) {
return this->height;
}
void Paint::SetHeight(int height) {
this->height = height;
}
int Paint::GetRotate(void) {
return this->rotate;
}
void Paint::SetRotate(int rotate){
this->rotate = rotate;
}
/**
* @brief: this draws a pixel by the coordinates
*/
void Paint::DrawPixel(int x, int y, int colored) {
int point_temp;
if (this->rotate == ROTATE_0) {
if(x < 0 || x >= this->width || y < 0 || y >= this->height) {
return;
}
DrawAbsolutePixel(x, y, colored);
} else if (this->rotate == ROTATE_90) {
if(x < 0 || x >= this->height || y < 0 || y >= this->width) {
return;
}
point_temp = x;
x = this->width - y;
y = point_temp;
DrawAbsolutePixel(x, y, colored);
} else if (this->rotate == ROTATE_180) {
if(x < 0 || x >= this->width || y < 0 || y >= this->height) {
return;
}
x = this->width - x;
y = this->height - y;
DrawAbsolutePixel(x, y, colored);
} else if (this->rotate == ROTATE_270) {
if(x < 0 || x >= this->height || y < 0 || y >= this->width) {
return;
}
point_temp = x;
x = y;
y = this->height - point_temp;
DrawAbsolutePixel(x, y, colored);
}
}
/**
* @brief: this draws a charactor on the frame buffer but not refresh
*/
void Paint::DrawCharAt(int x, int y, char ascii_char, sFONT* font, int colored) {
int i, j;
unsigned int char_offset = (ascii_char - ' ') * font->Height * (font->Width / 8 + (font->Width % 8 ? 1 : 0));
const unsigned char* ptr = &font->table[char_offset];
for (j = 0; j < font->Height; j++) {
for (i = 0; i < font->Width; i++) {
if (pgm_read_byte(ptr) & (0x80 >> (i % 8))) {
DrawPixel(x + i, y + j, colored);
}
if (i % 8 == 7) {
ptr++;
}
}
if (font->Width % 8 != 0) {
ptr++;
}
}
}
/**
* @brief: this displays a string on the frame buffer but not refresh
*/
void Paint::DrawStringAt(int x, int y, const char* text, sFONT* font, int colored) {
const char* p_text = text;
unsigned int counter = 0;
int refcolumn = x;
/* Send the string character by character on EPD */
while (*p_text != 0) {
/* Display one character on EPD */
DrawCharAt(refcolumn, y, *p_text, font, colored);
/* Decrement the column position by 16 */
refcolumn += font->Width;
/* Point on the next character */
p_text++;
counter++;
}
}
/**
* @brief: this draws a line on the frame buffer
*/
void Paint::DrawLine(int x0, int y0, int x1, int y1, int colored) {
/* Bresenham algorithm */
int dx = x1 - x0 >= 0 ? x1 - x0 : x0 - x1;
int sx = x0 < x1 ? 1 : -1;
int dy = y1 - y0 <= 0 ? y1 - y0 : y0 - y1;
int sy = y0 < y1 ? 1 : -1;
int err = dx + dy;
while((x0 != x1) && (y0 != y1)) {
DrawPixel(x0, y0 , colored);
if (2 * err >= dy) {
err += dy;
x0 += sx;
}
if (2 * err <= dx) {
err += dx;
y0 += sy;
}
}
}
/**
* @brief: this draws a horizontal line on the frame buffer
*/
void Paint::DrawHorizontalLine(int x, int y, int line_width, int colored) {
int i;
for (i = x; i < x + line_width; i++) {
DrawPixel(i, y, colored);
}
}
/**
* @brief: this draws a vertical line on the frame buffer
*/
void Paint::DrawVerticalLine(int x, int y, int line_height, int colored) {
int i;
for (i = y; i < y + line_height; i++) {
DrawPixel(x, i, colored);
}
}
/**
* @brief: this draws a rectangle
*/
void Paint::DrawRectangle(int x0, int y0, int x1, int y1, int colored) {
int min_x, min_y, max_x, max_y;
min_x = x1 > x0 ? x0 : x1;
max_x = x1 > x0 ? x1 : x0;
min_y = y1 > y0 ? y0 : y1;
max_y = y1 > y0 ? y1 : y0;
DrawHorizontalLine(min_x, min_y, max_x - min_x + 1, colored);
DrawHorizontalLine(min_x, max_y, max_x - min_x + 1, colored);
DrawVerticalLine(min_x, min_y, max_y - min_y + 1, colored);
DrawVerticalLine(max_x, min_y, max_y - min_y + 1, colored);
}
/**
* @brief: this draws a filled rectangle
*/
void Paint::DrawFilledRectangle(int x0, int y0, int x1, int y1, int colored) {
int min_x, min_y, max_x, max_y;
int i;
min_x = x1 > x0 ? x0 : x1;
max_x = x1 > x0 ? x1 : x0;
min_y = y1 > y0 ? y0 : y1;
max_y = y1 > y0 ? y1 : y0;
for (i = min_x; i <= max_x; i++) {
DrawVerticalLine(i, min_y, max_y - min_y + 1, colored);
}
}
/**
* @brief: this draws a circle
*/
void Paint::DrawCircle(int x, int y, int radius, int colored) {
/* Bresenham algorithm */
int x_pos = -radius;
int y_pos = 0;
int err = 2 - 2 * radius;
int e2;
do {
DrawPixel(x - x_pos, y + y_pos, colored);
DrawPixel(x + x_pos, y + y_pos, colored);
DrawPixel(x + x_pos, y - y_pos, colored);
DrawPixel(x - x_pos, y - y_pos, colored);
e2 = err;
if (e2 <= y_pos) {
err += ++y_pos * 2 + 1;
if(-x_pos == y_pos && e2 <= x_pos) {
e2 = 0;
}
}
if (e2 > x_pos) {
err += ++x_pos * 2 + 1;
}
} while (x_pos <= 0);
}
/**
* @brief: this draws a filled circle
*/
void Paint::DrawFilledCircle(int x, int y, int radius, int colored) {
/* Bresenham algorithm */
int x_pos = -radius;
int y_pos = 0;
int err = 2 - 2 * radius;
int e2;
do {
DrawPixel(x - x_pos, y + y_pos, colored);
DrawPixel(x + x_pos, y + y_pos, colored);
DrawPixel(x + x_pos, y - y_pos, colored);
DrawPixel(x - x_pos, y - y_pos, colored);
DrawHorizontalLine(x + x_pos, y + y_pos, 2 * (-x_pos) + 1, colored);
DrawHorizontalLine(x + x_pos, y - y_pos, 2 * (-x_pos) + 1, colored);
e2 = err;
if (e2 <= y_pos) {
err += ++y_pos * 2 + 1;
if(-x_pos == y_pos && e2 <= x_pos) {
e2 = 0;
}
}
if(e2 > x_pos) {
err += ++x_pos * 2 + 1;
}
} while(x_pos <= 0);
}
/* END OF FILE */

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/**
* @filename : epdpaint.h
* @brief : Header file for epdpaint.cpp
* @author : Yehui from Waveshare
*
* Copyright (C) Waveshare July 28 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 EPDPAINT_H
#define EPDPAINT_H
// Display orientation
#define ROTATE_0 0
#define ROTATE_90 1
#define ROTATE_180 2
#define ROTATE_270 3
// Color inverse. 1 or 0 = set or reset a bit if set a colored pixel
#define IF_INVERT_COLOR 1
#include "fonts.h"
class Paint {
public:
Paint(unsigned char* image, int width, int height);
~Paint();
void Clear(int colored);
int GetWidth(void);
void SetWidth(int width);
int GetHeight(void);
void SetHeight(int height);
int GetRotate(void);
void SetRotate(int rotate);
unsigned char* GetImage(void);
void DrawAbsolutePixel(int x, int y, int colored);
void DrawPixel(int x, int y, int colored);
void DrawCharAt(int x, int y, char ascii_char, sFONT* font, int colored);
void DrawStringAt(int x, int y, const char* text, sFONT* font, int colored);
void DrawLine(int x0, int y0, int x1, int y1, int colored);
void DrawHorizontalLine(int x, int y, int width, int colored);
void DrawVerticalLine(int x, int y, int height, int colored);
void DrawRectangle(int x0, int y0, int x1, int y1, int colored);
void DrawFilledRectangle(int x0, int y0, int x1, int y1, int colored);
void DrawCircle(int x, int y, int radius, int colored);
void DrawFilledCircle(int x, int y, int radius, int colored);
private:
unsigned char* image;
int width;
int height;
int rotate;
};
#endif
/* END OF FILE */

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/**
******************************************************************************
* @file fonts.h
* @author MCD Application Team
* @version V1.0.0
* @date 18-February-2014
* @brief Header for fonts.c file
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __FONTS_H
#define __FONTS_H
/* Max size of bitmap will based on a font24 (17x24) */
#define MAX_HEIGHT_FONT 24
#define MAX_WIDTH_FONT 17
#define OFFSET_BITMAP 54
/* Includes ------------------------------------------------------------------*/
#include <stdint.h>
struct sFONT {
const uint8_t *table;
uint16_t Width;
uint16_t Height;
};
extern sFONT Font24;
extern sFONT Font20;
extern sFONT Font16;
extern sFONT Font12;
extern sFONT Font8;
#endif /* __FONTS_H */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

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/**
* @filename : imagedata.h
* @brief : head file for imagedata.cpp
*
* Copyright (C) Waveshare July 17 2020
*
* 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.
*/
extern const unsigned char IMAGE_DATA[]; //1-Gray 480*280
/* FILE END */