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e-Paper/Arduino/epd2in9b_V4/epd2in9b_V4.cpp
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369
e-Paper/Arduino/epd2in9b_V4/epd2in9b_V4.cpp
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/**
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* @filename : epd2in9b_V4.cpp
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* @brief : Implements for e-paper library
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* @author : Waveshare
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*
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* Copyright (C) Waveshare 2023-12-20
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documnetation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include "epd2in9b_V4.h"
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#include "imagedata.h"
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Epd::~Epd() {
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};
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Epd::Epd() {
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reset_pin = RST_PIN;
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dc_pin = DC_PIN;
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cs_pin = CS_PIN;
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busy_pin = BUSY_PIN;
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width = EPD_WIDTH;
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height = EPD_HEIGHT;
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};
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int Epd::Init(void) {
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if (IfInit() != 0) {
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return -1;
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}
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Reset();
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ReadBusy();
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SendCommand(0x12);
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ReadBusy();
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SendCommand(0x01); //Driver output control
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SendData((height-1)%256);
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SendData((height-1)/256);
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SendData(0x00);
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SendCommand(0x11); //data entry mode
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SendData(0x03);
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SendCommand(0x44); //set Ram-X address start/end position
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SendData(0x00);
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SendData(width/8-1);
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SendCommand(0x45); //set Ram-Y address start/end position
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SendData(0x00);
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SendData(0x00);
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SendData((height-1)%256);
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SendData((height-1)/256);
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SendCommand(0x3C); //BorderWavefrom
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SendData(0x05);
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SendCommand(0x21); // Display update control
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SendData(0x00);
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SendData(0x80);
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SendCommand(0x18); //Read built-in temperature sensor
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SendData(0x80);
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SendCommand(0x4E); // set RAM x address count to 0;
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SendData(0x00);
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SendCommand(0x4F); // set RAM y address count to 0X199;
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SendData(0x00);
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SendData(0x00);
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ReadBusy();
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return 0;
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}
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int Epd::Init_Fast(void) {
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if (IfInit() != 0) {
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return -1;
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}
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Reset();
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ReadBusy();
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SendCommand(0x12); //SWRESET
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ReadBusy();
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SendCommand(0x18); //Read built-in temperature sensor
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SendData(0x80);
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SendCommand(0x22); // Load temperature value
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SendData(0xB1);
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SendCommand(0x20);
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ReadBusy();
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SendCommand(0x1A); // Write to temperature register
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SendData(0x5a); // 90
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SendData(0x00);
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SendCommand(0x22); // Load temperature value
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SendData(0x91);
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SendCommand(0x20);
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ReadBusy();
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SendCommand(0x01); //Driver output control
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SendData((height-1)%256);
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SendData((height-1)/256);
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SendData(0x00);
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SendCommand(0x11); //data entry mode
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SendData(0x03);
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SendCommand(0x44); //set Ram-X address start/end position
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SendData(0x00);
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SendData(width/8-1);
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SendCommand(0x45); //set Ram-Y address start/end position
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SendData(0x00);
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SendData(0x00);
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SendData((height-1)%256);
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SendData((height-1)/256);
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SendCommand(0x4E); // set RAM x address count to 0;
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SendData(0x00);
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SendCommand(0x4F); // set RAM y address count to 0X199;
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SendData(0x00);
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SendData(0x00);
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ReadBusy();
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return 0;
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}
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/**
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* @brief: basic function for sending commands
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*/
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void Epd::SendCommand(unsigned char command) {
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DigitalWrite(dc_pin, LOW);
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SpiTransfer(command);
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}
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/**
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* @brief: basic function for sending data
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*/
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void Epd::SendData(unsigned char data) {
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DigitalWrite(dc_pin, HIGH);
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SpiTransfer(data);
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}
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/**
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* @brief: Wait until the busy_pin goes HIGH
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*/
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void Epd::ReadBusy(void) {
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unsigned char busy;
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Serial.print("e-Paper busy \r\n ");
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while(1)
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{
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if(DigitalRead(busy_pin) == 0)
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break;
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DelayMs(50);
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}
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Serial.print("e-Paper busy release \r\n ");
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DelayMs(200);
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}
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/**
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* @brief: module reset.
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* often used to awaken the module in deep sleep,
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* see Epd::Sleep();
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*/
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void Epd::Reset(void) {
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DigitalWrite(reset_pin, HIGH);
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DelayMs(200);
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DigitalWrite(reset_pin, LOW); //module reset
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DelayMs(5);
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DigitalWrite(reset_pin, HIGH);
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DelayMs(200);
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}
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/******************************************************************************
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function : Turn On Display
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parameter:
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******************************************************************************/
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void Epd::TurnOnDisplay(void)
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{
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SendCommand(0x22); //Display Update Control
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SendData(0xF7);
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SendCommand(0x20); //Activate Display Update Sequence
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ReadBusy();
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}
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void Epd::TurnOnDisplay_Base(void)
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{
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SendCommand(0x22); //Display Update Control
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SendData(0xF4);
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SendCommand(0x20); //Activate Display Update Sequence
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ReadBusy();
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}
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void Epd::TurnOnDisplay_Partial(void)
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{
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SendCommand(0x22); //Display Update Control
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SendData(0x1C);
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SendCommand(0x20); //Activate Display Update Sequence
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ReadBusy();
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}
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void Epd::TurnOnDisplay_Fast(void)
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{
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SendCommand(0x22); //Display Update Control
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SendData(0xC7);
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SendCommand(0x20); //Activate Display Update Sequence
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ReadBusy();
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}
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void Epd::Display(const UBYTE *blackimage, const UBYTE *ryimage) {
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UBYTE k;
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SendCommand(0x24);
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for (UWORD j = 0; j < height; j++) {
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for (UWORD i = 0; i < width/8; i++) {
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SendData(pgm_read_byte(&blackimage[i + (j*width/8)]));
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}
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}
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SendCommand(0x26);
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for (UWORD j = 0; j < height; j++) {
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for (UWORD i = 0; i < width/8; i++) {
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k = pgm_read_byte(&ryimage[i + (j*width/8)]);
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SendData(~k);
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}
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}
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TurnOnDisplay();
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}
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void Epd::Display_Fast(const UBYTE *blackimage, const UBYTE *ryimage) {
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UBYTE k;
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SendCommand(0x24);
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for (UWORD j = 0; j < height; j++) {
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for (UWORD i = 0; i < width/8; i++) {
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SendData(pgm_read_byte(&blackimage[i + (j*width/8)]));
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}
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}
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SendCommand(0x26);
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for (UWORD j = 0; j < height; j++) {
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for (UWORD i = 0; i < width/8; i++) {
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k = pgm_read_byte(&ryimage[i + (j*width/8)]);
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SendData(~k);
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}
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}
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TurnOnDisplay_Fast();
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}
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void Epd::Clear() {
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//send black data
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SendCommand(0x24);
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for (UWORD j = 0; j < height; j++) {
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for (UWORD i = 0; i < width/8; i++) {
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SendData(0xff);
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}
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}
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//send red data
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SendCommand(0x26);
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for (UWORD j = 0; j < height; j++) {
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for (UWORD i = 0; i < width/8; i++) {
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SendData(0x00);
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}
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}
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TurnOnDisplay_Base();
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SendCommand(0x26);
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for (UWORD j = 0; j < height; j++) {
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for (UWORD i = 0; i < width/8; i++) {
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SendData(0xff);
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}
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}
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}
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void Epd::Clear_Base() {
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//send black data
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SendCommand(0x10);
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for (UWORD j = 0; j < height; j++) {
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for (UWORD i = 0; i < width/8; i++) {
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SendData(0xff);
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}
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}
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//send red data
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SendCommand(0x26);
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for (UWORD j = 0; j < height; j++) {
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for (UWORD i = 0; i < width/8; i++) {
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SendData(0x00);
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}
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}
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TurnOnDisplay();
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}
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//Partial refresh display
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void Epd::Partial(const UBYTE *Image, UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend)
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{
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if((Xstart % 8 + Xend % 8 == 8 && Xstart % 8 > Xend % 8) || Xstart % 8 + Xend % 8 == 0 || (Xend - Xstart)%8 == 0)
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{
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Xstart = Xstart / 8 ;
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Xend = Xend / 8;
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}
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else
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{
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Xstart = Xstart / 8 ;
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Xend = Xend % 8 == 0 ? Xend / 8 : Xend / 8 + 1;
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}
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UWORD i, Width;
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Width = Xend - Xstart;
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UWORD IMAGE_COUNTER = Width * (Yend-Ystart);
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Xend -= 1;
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Yend -= 1;
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SendCommand(0x44); // set RAM x address start/end, in page 35
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SendData(Xstart & 0xff); // RAM x address start at 00h;
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SendData(Xend & 0xff); // RAM x address end at 0fh(15+1)*8->128
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SendCommand(0x45); // set RAM y address start/end, in page 35
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SendData(Ystart & 0xff); // RAM y address start at 0127h;
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SendData((Ystart>>8) & 0x01); // RAM y address start at 0127h;
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SendData(Yend & 0xff); // RAM y address end at 00h;
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SendData((Yend>>8) & 0x01);
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SendCommand(0x4E); // set RAM x address count to 0;
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SendData(Xstart & 0xff);
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SendCommand(0x4F); // set RAM y address count to 0X127;
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SendData(Ystart & 0xff);
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SendData((Ystart>>8) & 0x01);
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SendCommand(0x24); //Write Black and White image to RAM
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for (i = 0; i < IMAGE_COUNTER; i++) {
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SendData(pgm_read_byte(&Image[i]));
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}
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TurnOnDisplay_Partial();
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}
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/**
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* @brief: After this command is transmitted, the chip would enter the
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* deep-sleep mode to save power.
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* The deep sleep mode would return to standby by hardware reset.
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* The only one parameter is a check code, the command would be
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* You can use EPD_Reset() to awaken
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*/
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void Epd::Sleep(void) {
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SendCommand(0x10); // DEEP_SLEEP
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SendData(0x01); // check code
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}
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/* END OF FILE */
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