270 lines
7.4 KiB
C++
270 lines
7.4 KiB
C++
/**
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* @filename : epd1in54b.cpp
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* @brief : Implements for 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 "epd1in54b.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_SETTING);
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SendData(0x07);
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SendData(0x00);
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SendData(0x08);
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SendData(0x00);
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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(0x07);
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SendCommand(POWER_ON);
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WaitUntilIdle();
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SendCommand(PANEL_SETTING);
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SendData(0xcf);
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SendCommand(VCOM_AND_DATA_INTERVAL_SETTING);
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SendData(0x17);
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SendCommand(PLL_CONTROL);
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SendData(0x39);
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SendCommand(TCON_RESOLUTION);
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SendData(0xC8);
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SendData(0x00);
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SendData(0xC8);
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SendCommand(VCM_DC_SETTING_REGISTER);
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SendData(0x0E);
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SetLutBw();
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SetLutRed();
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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); //module reset
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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: set the look-up tables
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*/
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void Epd::SetLutBw(void) {
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unsigned int count;
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SendCommand(0x20); //g vcom
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for(count = 0; count < 15; count++) {
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SendData(lut_vcom0[count]);
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}
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SendCommand(0x21); //g ww --
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for(count = 0; count < 15; count++) {
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SendData(lut_w[count]);
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}
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SendCommand(0x22); //g bw r
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for(count = 0; count < 15; count++) {
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SendData(lut_b[count]);
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}
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SendCommand(0x23); //g wb w
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for(count = 0; count < 15; count++) {
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SendData(lut_g1[count]);
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}
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SendCommand(0x24); //g bb b
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for(count = 0; count < 15; count++) {
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SendData(lut_g2[count]);
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}
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}
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void Epd::SetLutRed(void) {
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unsigned int count;
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SendCommand(0x25);
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for(count = 0; count < 15; count++) {
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SendData(lut_vcom1[count]);
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}
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SendCommand(0x26);
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for(count = 0; count < 15; count++) {
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SendData(lut_red0[count]);
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}
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SendCommand(0x27);
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for(count = 0; count < 15; count++) {
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SendData(lut_red1[count]);
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}
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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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unsigned char temp;
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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 < this->width * this->height / 8; i++) {
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temp = 0x00;
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for (int bit = 0; bit < 4; bit++) {
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if ((pgm_read_byte(&frame_buffer_black[i]) & (0x80 >> bit)) != 0) {
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temp |= 0xC0 >> (bit * 2);
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}
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}
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SendData(temp);
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temp = 0x00;
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for (int bit = 4; bit < 8; bit++) {
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if ((pgm_read_byte(&frame_buffer_black[i]) & (0x80 >> bit)) != 0) {
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temp |= 0xC0 >> ((bit - 4) * 2);
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}
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}
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SendData(temp);
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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 < this->width * this->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: 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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* executed if check code = 0xA5.
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* You can use Epd::Init() to awaken
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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(0x17);
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SendCommand(VCM_DC_SETTING_REGISTER); //to solve Vcom drop
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SendData(0x00);
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SendCommand(POWER_SETTING); //power setting
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SendData(0x02); //gate switch to external
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SendData(0x00);
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SendData(0x00);
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SendData(0x00);
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WaitUntilIdle();
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SendCommand(POWER_OFF); //power off
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}
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const unsigned char lut_vcom0[] =
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{
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0x0E, 0x14, 0x01, 0x0A, 0x06, 0x04, 0x0A, 0x0A,
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0x0F, 0x03, 0x03, 0x0C, 0x06, 0x0A, 0x00
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};
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const unsigned char lut_w[] =
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{
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0x0E, 0x14, 0x01, 0x0A, 0x46, 0x04, 0x8A, 0x4A,
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0x0F, 0x83, 0x43, 0x0C, 0x86, 0x0A, 0x04
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};
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const unsigned char lut_b[] =
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{
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0x0E, 0x14, 0x01, 0x8A, 0x06, 0x04, 0x8A, 0x4A,
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0x0F, 0x83, 0x43, 0x0C, 0x06, 0x4A, 0x04
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};
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const unsigned char lut_g1[] =
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{
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0x8E, 0x94, 0x01, 0x8A, 0x06, 0x04, 0x8A, 0x4A,
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0x0F, 0x83, 0x43, 0x0C, 0x06, 0x0A, 0x04
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};
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const unsigned char lut_g2[] =
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{
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0x8E, 0x94, 0x01, 0x8A, 0x06, 0x04, 0x8A, 0x4A,
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0x0F, 0x83, 0x43, 0x0C, 0x06, 0x0A, 0x04
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};
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const unsigned char lut_vcom1[] =
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{
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0x03, 0x1D, 0x01, 0x01, 0x08, 0x23, 0x37, 0x37,
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0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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const unsigned char lut_red0[] =
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{
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0x83, 0x5D, 0x01, 0x81, 0x48, 0x23, 0x77, 0x77,
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0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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const unsigned char lut_red1[] =
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{
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0x03, 0x1D, 0x01, 0x01, 0x08, 0x23, 0x37, 0x37,
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0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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};
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/* END OF FILE */
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