417 lines
12 KiB
C++
417 lines
12 KiB
C++
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/**
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* @filename : epd2in7b.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 "epd2in7b.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(POWER_ON);
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WaitUntilIdle();
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SendCommand(PANEL_SETTING);
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SendData(0xaf); //KW-BF KWR-AF BWROTP 0f
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SendCommand(PLL_CONTROL);
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SendData(0x3a); //3A 100HZ 29 150Hz 39 200HZ 31 171HZ
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SendCommand(POWER_SETTING);
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SendData(0x03); // VDS_EN, VDG_EN
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SendData(0x00); // VCOM_HV, VGHL_LV[1], VGHL_LV[0]
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SendData(0x2b); // VDH
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SendData(0x2b); // VDL
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SendData(0x09); // VDHR
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SendCommand(BOOSTER_SOFT_START);
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SendData(0x07);
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SendData(0x07);
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SendData(0x17);
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// Power optimization
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SendCommand(0xF8);
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SendData(0x60);
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SendData(0xA5);
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// Power optimization
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SendCommand(0xF8);
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SendData(0x89);
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SendData(0xA5);
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// Power optimization
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SendCommand(0xF8);
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SendData(0x90);
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SendData(0x00);
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// Power optimization
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SendCommand(0xF8);
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SendData(0x93);
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SendData(0x2A);
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// Power optimization
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SendCommand(0xF8);
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SendData(0x73);
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SendData(0x41);
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SendCommand(VCM_DC_SETTING_REGISTER);
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SendData(0x12);
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SendCommand(VCOM_AND_DATA_INTERVAL_SETTING);
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SendData(0x87); // define by OTP
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SetLut();
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SendCommand(PARTIAL_DISPLAY_REFRESH);
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SendData(0x00);
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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, HIGH);
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DelayMs(200);
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DigitalWrite(reset_pin, LOW);
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DelayMs(10);
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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: set the look-up tables
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*/
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void Epd::SetLut(void) {
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unsigned int count;
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SendCommand(LUT_FOR_VCOM); //vcom
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for(count = 0; count < 44; count++) {
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SendData(lut_vcom_dc[count]);
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}
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SendCommand(LUT_WHITE_TO_WHITE); //ww --
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for(count = 0; count < 42; count++) {
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SendData(lut_ww[count]);
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}
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SendCommand(LUT_BLACK_TO_WHITE); //bw r
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for(count = 0; count < 42; count++) {
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SendData(lut_bw[count]);
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}
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SendCommand(LUT_WHITE_TO_BLACK); //wb w
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for(count = 0; count < 42; count++) {
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SendData(lut_bb[count]);
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}
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SendCommand(LUT_BLACK_TO_BLACK); //bb b
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for(count = 0; count < 42; count++) {
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SendData(lut_wb[count]);
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}
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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::TransmitPartial(const unsigned char* buffer_black, const unsigned char* buffer_red, int x, int y, int w, int l) {
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if (buffer_black != NULL) {
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SendCommand(PARTIAL_DATA_START_TRANSMISSION_1);
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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(y >> 8);
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SendData(y & 0xff);
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SendData(w >> 8);
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SendData(w & 0xf8); // w (width) should be the multiple of 8, the last 3 bit will always be ignored
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SendData(l >> 8);
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SendData(l & 0xff);
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DelayMs(2);
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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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DelayMs(2);
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}
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if (buffer_red != NULL) {
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SendCommand(PARTIAL_DATA_START_TRANSMISSION_2);
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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(y >> 8);
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SendData(y & 0xff);
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SendData(w >> 8);
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SendData(w & 0xf8); // w (width) should be the multiple of 8, the last 3 bit will always be ignored
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SendData(l >> 8);
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SendData(l & 0xff);
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DelayMs(2);
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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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DelayMs(2);
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}
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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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SendCommand(PARTIAL_DATA_START_TRANSMISSION_1);
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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(y >> 8);
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SendData(y & 0xff);
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SendData(w >> 8);
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SendData(w & 0xf8); // w (width) should be the multiple of 8, the last 3 bit will always be ignored
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SendData(l >> 8);
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SendData(l & 0xff);
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DelayMs(2);
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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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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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SendCommand(PARTIAL_DATA_START_TRANSMISSION_2);
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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(y >> 8);
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SendData(y & 0xff);
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SendData(w >> 8);
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SendData(w & 0xf8); // w (width) should be the multiple of 8, the last 3 bit will always be ignored
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SendData(l >> 8);
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SendData(l & 0xff);
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DelayMs(2);
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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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DelayMs(2);
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}
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}
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/**
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* @brief: refreshes a specific part of the display
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*/
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void Epd::RefreshPartial(int x, int y, int w, int l) {
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SendCommand(PARTIAL_DISPLAY_REFRESH);
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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(y >> 8);
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SendData(y & 0xff);
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SendData(w >> 8);
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SendData(w & 0xf8); // w (width) should be the multiple of 8, the last 3 bit will always be ignored
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SendData(l >> 8);
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SendData(l & 0xff);
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WaitUntilIdle();
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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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SendCommand(TCON_RESOLUTION);
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SendData(width >> 8);
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SendData(width & 0xff); //176
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SendData(height >> 8);
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SendData(height & 0xff); //264
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if (frame_buffer_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 < 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(DATA_START_TRANSMISSION_2);
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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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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(TCON_RESOLUTION);
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SendData(width >> 8);
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SendData(width & 0xff); //176
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SendData(height >> 8);
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SendData(height & 0xff); //264
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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 * height / 8; i++) {
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SendData(0x00);
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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 * height / 8; i++) {
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SendData(0x00);
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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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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(DEEP_SLEEP);
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SendData(0xa5);
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}
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const unsigned char lut_vcom_dc[] =
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{
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0x00, 0x00,
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0x00, 0x1A, 0x1A, 0x00, 0x00, 0x01,
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0x00, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x00, 0x0E, 0x01, 0x0E, 0x01, 0x10,
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0x00, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x00, 0x04, 0x10, 0x00, 0x00, 0x05,
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0x00, 0x03, 0x0E, 0x00, 0x00, 0x0A,
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0x00, 0x23, 0x00, 0x00, 0x00, 0x01
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};
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//R21H
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const unsigned char lut_ww[] =
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{
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0x90, 0x1A, 0x1A, 0x00, 0x00, 0x01,
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0x40, 0x0A, 0x0A, 0x00, 0x00, 0x08,
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0x84, 0x0E, 0x01, 0x0E, 0x01, 0x10,
|
||
|
|
0x80, 0x0A, 0x0A, 0x00, 0x00, 0x08,
|
||
|
|
0x00, 0x04, 0x10, 0x00, 0x00, 0x05,
|
||
|
|
0x00, 0x03, 0x0E, 0x00, 0x00, 0x0A,
|
||
|
|
0x00, 0x23, 0x00, 0x00, 0x00, 0x01
|
||
|
|
};
|
||
|
|
|
||
|
|
//R22H r
|
||
|
|
const unsigned char lut_bw[] =
|
||
|
|
{
|
||
|
|
0xA0, 0x1A, 0x1A, 0x00, 0x00, 0x01,
|
||
|
|
0x00, 0x0A, 0x0A, 0x00, 0x00, 0x08,
|
||
|
|
0x84, 0x0E, 0x01, 0x0E, 0x01, 0x10,
|
||
|
|
0x90, 0x0A, 0x0A, 0x00, 0x00, 0x08,
|
||
|
|
0xB0, 0x04, 0x10, 0x00, 0x00, 0x05,
|
||
|
|
0xB0, 0x03, 0x0E, 0x00, 0x00, 0x0A,
|
||
|
|
0xC0, 0x23, 0x00, 0x00, 0x00, 0x01
|
||
|
|
};
|
||
|
|
|
||
|
|
//R23H w
|
||
|
|
const unsigned char lut_bb[] =
|
||
|
|
{
|
||
|
|
0x90, 0x1A, 0x1A, 0x00, 0x00, 0x01,
|
||
|
|
0x40, 0x0A, 0x0A, 0x00, 0x00, 0x08,
|
||
|
|
0x84, 0x0E, 0x01, 0x0E, 0x01, 0x10,
|
||
|
|
0x80, 0x0A, 0x0A, 0x00, 0x00, 0x08,
|
||
|
|
0x00, 0x04, 0x10, 0x00, 0x00, 0x05,
|
||
|
|
0x00, 0x03, 0x0E, 0x00, 0x00, 0x0A,
|
||
|
|
0x00, 0x23, 0x00, 0x00, 0x00, 0x01
|
||
|
|
};
|
||
|
|
|
||
|
|
//R24H b
|
||
|
|
const unsigned char lut_wb[] =
|
||
|
|
{
|
||
|
|
0x90, 0x1A, 0x1A, 0x00, 0x00, 0x01,
|
||
|
|
0x20, 0x0A, 0x0A, 0x00, 0x00, 0x08,
|
||
|
|
0x84, 0x0E, 0x01, 0x0E, 0x01, 0x10,
|
||
|
|
0x10, 0x0A, 0x0A, 0x00, 0x00, 0x08,
|
||
|
|
0x00, 0x04, 0x10, 0x00, 0x00, 0x05,
|
||
|
|
0x00, 0x03, 0x0E, 0x00, 0x00, 0x0A,
|
||
|
|
0x00, 0x23, 0x00, 0x00, 0x00, 0x01
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* END OF FILE */
|