238 lines
6.5 KiB
C++
238 lines
6.5 KiB
C++
/**
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* @filename : epd2in7b_V2.cpp
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* @brief : Implements for Dual-color e-paper library
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* @author :
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*
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* Copyright (C) Waveshare Feb 19 2021
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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 "epd2in7b_V2.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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/* this calls the peripheral hardware interface, see epdif */
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if (IfInit() != 0) {
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return -1;
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}
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/* EPD hardware init start */
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Reset();
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WaitUntilIdle();
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SendCommand(0x12);
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WaitUntilIdle();
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SendCommand(0x00);
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SendData(0x27);
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SendData(0x01);
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SendData(0x00);
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SendCommand(0x11);
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SendData(0x03);
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SetWindows(0, 0, width-1, height-1);
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SetCursor(0, 0);
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/* EPD hardware init end */
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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::WaitUntilIdle(void) {
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while(DigitalRead(busy_pin) == 1) { //0: busy, 1: idle
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DelayMs(10);
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}
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}
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/******************************************************************************
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function : Setting the display window
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parameter:
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******************************************************************************/
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void Epd::SetWindows(UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend)
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{
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SendCommand(0x44); // SET_RAM_X_ADDRESS_START_END_POSITION
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SendData((Xstart>>3) & 0xFF);
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SendData((Xend>>3) & 0xFF);
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SendCommand(0x45); // SET_RAM_Y_ADDRESS_START_END_POSITION
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SendData(Ystart & 0xFF);
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SendData((Ystart >> 8) & 0xFF);
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SendData(Yend & 0xFF);
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SendData((Yend >> 8) & 0xFF);
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}
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/******************************************************************************
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function : Set Cursor
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parameter:
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******************************************************************************/
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void Epd::SetCursor(UWORD Xstart, UWORD Ystart)
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{
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SendCommand(0x4E); // SET_RAM_X_ADDRESS_COUNTER
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SendData(Xstart & 0xFF);
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SendCommand(0x4F); // SET_RAM_Y_ADDRESS_COUNTER
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SendData(Ystart & 0xFF);
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SendData((Ystart >> 8) & 0xFF);
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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);
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DelayMs(2);
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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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* @brief: transmit partial data to the black part of SRAM
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*/
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void Epd::TransmitPartialBlack(const unsigned char* buffer_black, int x, int y, int w, int l) {
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if (buffer_black != NULL) {
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int width = (w%8 == 0 ? w/8 : w/8+1);
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SetWindows(x, y, w+x-1, l+y-1);
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SetCursor(x, y);
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SendCommand(0x24);
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DelayMs(2);
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for(int i = 0; i < width * l; i++) {
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SendData(~buffer_black[i]);
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}
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DelayMs(2);
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}
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}
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/**
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* @brief: transmit partial data to the red part of SRAM
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*/
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void Epd::TransmitPartialRed(const unsigned char* buffer_red, int x, int y, int w, int l) {
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if (buffer_red != NULL) {
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int width = (w%8 == 0 ? w/8 : w/8+1);
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SetWindows(x, y, w+x-1, l+y-1);
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SetCursor(x, y);
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SendCommand(0x26);
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DelayMs(2);
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for(int i = 0; i < width * l; i++) {
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SendData(buffer_red[i]);
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}
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DelayMs(2);
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}
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}
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/**
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* @brief: refresh and displays the frame
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*/
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void Epd::DisplayFrame(const unsigned char* frame_buffer_black, const unsigned char* frame_buffer_red) {
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if (frame_buffer_black != NULL) {
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SendCommand(0x24);
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DelayMs(2);
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for(int i = 0; i < width * height / 8; i++) {
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SendData(~pgm_read_byte(&frame_buffer_black[i]));
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}
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DelayMs(2);
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}
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if (frame_buffer_red != NULL) {
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SendCommand(0x26);
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DelayMs(2);
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for(int i = 0; i < width * height / 8; i++) {
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SendData(pgm_read_byte(&frame_buffer_red[i]));
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}
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DelayMs(2);
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}
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DisplayFrame();
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}
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/**
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* @brief: clear the frame data from the SRAM, this won't refresh the display
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*/
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void Epd::ClearFrame(void) {
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SendCommand(0x24);
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DelayMs(2);
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for(int i = 0; i < width * height / 8; i++) {
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SendData(0xff);
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}
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DelayMs(2);
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SendCommand(0x26);
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DelayMs(2);
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for(int i = 0; i < width * height / 8; i++) {
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SendData(0x00);
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}
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DelayMs(2);
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DisplayFrame();
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}
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/**
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* @brief: This displays the frame data from SRAM
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*/
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void Epd::DisplayFrame(void) {
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SendCommand(0x20);
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WaitUntilIdle();
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}
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/**
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* @brief: After this command is transmitted, the chip would enter the deep-sleep mode to save power.
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* The deep sleep mode would return to standby by hardware reset. The only one parameter is a
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* check code, the command would be executed if check code = 0xA5.
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* You can use Epd::Reset() to awaken and use Epd::Init() to initialize.
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*/
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void Epd::Sleep() {
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SendCommand(0x10);
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SendData(0x01);
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}
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/* END OF FILE */
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