251 lines
7.7 KiB
C++
251 lines
7.7 KiB
C++
/**
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* @filename : epd4in2b.cpp
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* @brief : Implements for Dual-color e-paper library
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* @author : Yehui from Waveshare
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*
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* Copyright (C) Waveshare August 10 2017
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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 "epd4in2b.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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SendCommand(BOOSTER_SOFT_START);
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SendData(0x17);
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SendData(0x17);
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SendData(0x17); //07 0f 17 1f 27 2F 37 2f
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SendCommand(POWER_ON);
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WaitUntilIdle();
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SendCommand(PANEL_SETTING);
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SendData(0x0F); // LUT from OTP
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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) == 0) { //0: busy, 1: idle
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DelayMs(100);
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}
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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, LOW);
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DelayMs(200);
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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 SRAM
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*/
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void Epd::SetPartialWindow(const unsigned char* buffer_black, const unsigned char* buffer_red, int x, int y, int w, int l) {
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SendCommand(PARTIAL_IN);
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SendCommand(PARTIAL_WINDOW);
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SendData(x >> 8);
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SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
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SendData(((x & 0xf8) + w - 1) >> 8);
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SendData(((x & 0xf8) + w - 1) | 0x07);
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SendData(y >> 8);
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SendData(y & 0xff);
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SendData((y + l - 1) >> 8);
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SendData((y + l - 1) & 0xff);
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SendData(0x01); // Gates scan both inside and outside of the partial window. (default)
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DelayMs(2);
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SendCommand(DATA_START_TRANSMISSION_1);
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if (buffer_black != NULL) {
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for(int i = 0; i < w / 8 * l; i++) {
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SendData(buffer_black[i]);
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}
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}
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DelayMs(2);
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SendCommand(DATA_START_TRANSMISSION_2);
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if (buffer_red != NULL) {
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for(int i = 0; i < w / 8 * l; i++) {
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SendData(buffer_red[i]);
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}
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}
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DelayMs(2);
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SendCommand(PARTIAL_OUT);
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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::SetPartialWindowBlack(const unsigned char* buffer_black, int x, int y, int w, int l) {
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SendCommand(PARTIAL_IN);
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SendCommand(PARTIAL_WINDOW);
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SendData(x >> 8);
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SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
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SendData(((x & 0xf8) + w - 1) >> 8);
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SendData(((x & 0xf8) + w - 1) | 0x07);
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SendData(y >> 8);
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SendData(y & 0xff);
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SendData((y + l - 1) >> 8);
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SendData((y + l - 1) & 0xff);
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SendData(0x01); // Gates scan both inside and outside of the partial window. (default)
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DelayMs(2);
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SendCommand(DATA_START_TRANSMISSION_1);
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if (buffer_black != NULL) {
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for(int i = 0; i < w / 8 * l; i++) {
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SendData(buffer_black[i]);
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}
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}
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DelayMs(2);
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SendCommand(PARTIAL_OUT);
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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::SetPartialWindowRed(const unsigned char* buffer_red, int x, int y, int w, int l) {
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SendCommand(PARTIAL_IN);
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SendCommand(PARTIAL_WINDOW);
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SendData(x >> 8);
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SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
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SendData(((x & 0xf8) + w - 1) >> 8);
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SendData(((x & 0xf8) + w - 1) | 0x07);
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SendData(y >> 8);
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SendData(y & 0xff);
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SendData((y + l - 1) >> 8);
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SendData((y + l - 1) & 0xff);
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SendData(0x01); // Gates scan both inside and outside of the partial window. (default)
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DelayMs(2);
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SendCommand(DATA_START_TRANSMISSION_2);
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if (buffer_red != NULL) {
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for(int i = 0; i < w / 8 * l; i++) {
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SendData(buffer_red[i]);
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}
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}
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DelayMs(2);
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SendCommand(PARTIAL_OUT);
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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_black, const unsigned char* frame_red) {
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if (frame_black != NULL) {
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SendCommand(DATA_START_TRANSMISSION_1);
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DelayMs(2);
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for (int i = 0; i < this->width / 8 * this->height; i++) {
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SendData(pgm_read_byte(&frame_black[i]));
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}
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DelayMs(2);
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}
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if (frame_red != NULL) {
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SendCommand(DATA_START_TRANSMISSION_2);
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DelayMs(2);
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for (int i = 0; i < this->width / 8 * this->height; i++) {
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SendData(pgm_read_byte(&frame_red[i]));
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}
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DelayMs(2);
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}
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SendCommand(DISPLAY_REFRESH);
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WaitUntilIdle();
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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(DATA_START_TRANSMISSION_1);
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DelayMs(2);
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for(int i = 0; i < width / 8 * height; i++) {
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SendData(0xFF);
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}
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DelayMs(2);
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SendCommand(DATA_START_TRANSMISSION_2);
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DelayMs(2);
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for(int i = 0; i < width / 8 * height; i++) {
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SendData(0xFF);
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}
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DelayMs(2);
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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(DISPLAY_REFRESH);
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DelayMs(100);
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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(VCOM_AND_DATA_INTERVAL_SETTING);
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SendData(0xF7); // border floating
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SendCommand(POWER_OFF);
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WaitUntilIdle();
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SendCommand(DEEP_SLEEP);
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SendData(0xA5); // check code
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}
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/* END OF FILE */
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