173 lines
4.5 KiB
C++
173 lines
4.5 KiB
C++
/**
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* @filename : epd7in5.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 "epd7in5.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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if (IfInit() != 0) {
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return -1;
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}
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Reset();
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SendCommand(POWER_SETTING);
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SendData(0x37);
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SendData(0x00);
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SendCommand(PANEL_SETTING);
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SendData(0xCF);
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SendData(0x08);
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SendCommand(BOOSTER_SOFT_START);
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SendData(0xc7);
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SendData(0xcc);
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SendData(0x28);
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SendCommand(POWER_ON);
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WaitUntilIdle();
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SendCommand(PLL_CONTROL);
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SendData(0x3c);
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SendCommand(TEMPERATURE_CALIBRATION);
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SendData(0x00);
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SendCommand(VCOM_AND_DATA_INTERVAL_SETTING);
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SendData(0x77);
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SendCommand(TCON_SETTING);
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SendData(0x22);
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SendCommand(TCON_RESOLUTION);
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SendData(0x02); //source 640
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SendData(0x80);
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SendData(0x01); //gate 384
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SendData(0x80);
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SendCommand(VCM_DC_SETTING);
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SendData(0x1E); //decide by LUT file
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SendCommand(0xe5); //FLASH MODE
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SendData(0x03);
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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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void Epd::DisplayFrame(const unsigned char* frame_buffer) {
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unsigned char temp1, temp2;
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SendCommand(DATA_START_TRANSMISSION_1);
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for(long i = 0; i < EPD_WIDTH / 8 * EPD_HEIGHT; i++) {
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temp1 = pgm_read_byte(&frame_buffer[i]);
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for(unsigned char j = 0; j < 8; j++) {
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if(temp1 & 0x80)
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temp2 = 0x03;
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else
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temp2 = 0x00;
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temp2 <<= 4;
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temp1 <<= 1;
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j++;
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if(temp1 & 0x80)
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temp2 |= 0x03;
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else
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temp2 |= 0x00;
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temp1 <<= 1;
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SendData(temp2);
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}
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}
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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
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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_Reset() to awaken
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*/
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void Epd::Sleep(void) {
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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);
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}
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/* END OF FILE */
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