e-paper-display/bcm2835-1.71/e-Paper/Arduino/epd2in13b_V4/epd2in13b_V4.cpp

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2024-01-31 22:04:09 +00:00
/**
* @filename : epd2in13b_V4.cpp
* @brief : Implements for Three-color e-paper library
* @author : Yehui from Waveshare
*
* Copyright (C) Waveshare April 25 2022
*
* 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 "epd2in13b_V4.h"
Epd::~Epd() {
};
Epd::Epd() {
reset_pin = RST_PIN;
dc_pin = DC_PIN;
cs_pin = CS_PIN;
busy_pin = BUSY_PIN;
width = EPD_WIDTH;
bufwidth = 128/8;
height = EPD_HEIGHT;
bufheight = 63;
};
int Epd::Init(void) {
/* this calls the peripheral hardware interface, see epdif */
if (IfInit() != 0) {
return -1;
}
/* EPD hardware init start */
Reset();
WaitUntilIdle();
SendCommand(0x12); // SWRESET
WaitUntilIdle();
SendCommand(0x01); //Driver output control
SendData(0xf9);
SendData(0x00);
SendData(0x00);
SendCommand(0x11); //data entry mode
SendData(0x03);
SetWindows(0, 0, width-1, height-1);
SetCursor(0, 0);
SendCommand(0x3C); //BorderWavefrom
SendData(0x05);
SendCommand(0x18); //Read built-in temperature sensor
SendData(0x80);
SendCommand(0x21); // Display update control
SendData(0x80);
SendData(0x80);
WaitUntilIdle();
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) {
while(DigitalRead(busy_pin) == 1) { //1: busy, 0: idle
DelayMs(10);
}
DelayMs(10);
}
/**
* @brief: module reset.
* often used to awaken the module in deep sleep,
* see Epd::Sleep();
*/
void Epd::Reset(void) {
DigitalWrite(reset_pin, HIGH);
DelayMs(20);
DigitalWrite(reset_pin, LOW);
DelayMs(2);
DigitalWrite(reset_pin, HIGH);
DelayMs(20);
this->count = 0;
}
// Setting the display window
void Epd::SetWindows(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend) {
SendCommand(0x44); // SET_RAM_X_ADDRESS_START_END_POSITION
SendData((Xstart>>3) & 0xFF);
SendData((Xend>>3) & 0xFF);
SendCommand(0x45); // SET_RAM_Y_ADDRESS_START_END_POSITION
SendData(Ystart & 0xFF);
SendData((Ystart >> 8) & 0xFF);
SendData(Yend & 0xFF);
SendData((Yend >> 8) & 0xFF);
}
// Set Cursor
void Epd::SetCursor(UWORD Xstart, UWORD Ystart) {
SendCommand(0x4E); // SET_RAM_X_ADDRESS_COUNTER
SendData(Xstart & 0xFF);
SendCommand(0x4F); // SET_RAM_Y_ADDRESS_COUNTER
SendData(Ystart & 0xFF);
SendData((Ystart >> 8) & 0xFF);
}
/**
* @brief: refresh and displays the frame
*/
void Epd::DisplayFrame(const unsigned char* frame_buffer_black, const unsigned char* frame_buffer_red) {
if (frame_buffer_black != NULL) {
SendCommand(0x24);
for (int i = 0; i < this->bufwidth * this->height; i++) {
SendData(pgm_read_byte(&frame_buffer_black[i]));
}
DelayMs(2);
}
if (frame_buffer_red != NULL) {
SendCommand(0x26);
for (int i = 0; i < this->bufwidth * this->height; i++) {
SendData(pgm_read_byte(&frame_buffer_red[i]));
}
}
SendCommand(0x20);
WaitUntilIdle();
this->count = 0;
}
void Epd::Display(const unsigned char* frame_buffer) {
if(this->count == 0){
SendCommand(0x24);
this->count++;
}else if(this->count > 0 && this->count < 4 ){
this->count++;
}else if(this->count == 4){
SendCommand(0x26);
this->count++;
}else if(this->count > 4 && this->count < 8 ){
this->count++;
}
for(int i = 0; i < this->bufwidth * this->bufheight; i++){
SendData(frame_buffer[i]);
}
if(this->count == 8){
SendCommand(0x20);
WaitUntilIdle();
this->count = 0;
}
}
/**
* @brief: clear the frame data from the SRAM, this won't refresh the display
*/
void Epd::ClearFrame(void) {
SendCommand(0x24);
for(int i = 0; i < bufwidth * height; i++) {
SendData(0xFF);
}
SendCommand(0x26);
for(int i = 0; i < bufwidth * height; i++) {
SendData(0xFF);
}
SendCommand(0x20);
WaitUntilIdle();
this->count = 0;
}
/**
* @brief: This displays the frame data from SRAM
*/
void Epd::DisplayFrame(void) {
this->count = 0;
SendCommand(0x20); // Activate Display Update Sequence
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 executed if check code = 0xA5.
* You can use Epd::Reset() to awaken and use Epd::Init() to initialize.
*/
void Epd::Sleep() {
SendCommand(0x10); //enter deep sleep
SendData(0x01);
DelayMs(100);
this->count = 0;
}
/* END OF FILE */