e-paper-display/bcm2835-1.71/e-Paper/Arduino/epd2in7b/epd2in7b.cpp

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2024-01-31 22:04:09 +00:00
/**
* @filename : epd2in7b.cpp
* @brief : Implements for Dual-color e-paper library
* @author : Yehui from Waveshare
*
* Copyright (C) Waveshare August 10 2017
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documnetation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdlib.h>
#include "epd2in7b.h"
Epd::~Epd() {
};
Epd::Epd() {
reset_pin = RST_PIN;
dc_pin = DC_PIN;
cs_pin = CS_PIN;
busy_pin = BUSY_PIN;
width = EPD_WIDTH;
height = EPD_HEIGHT;
};
int Epd::Init(void) {
/* this calls the peripheral hardware interface, see epdif */
if (IfInit() != 0) {
return -1;
}
/* EPD hardware init start */
Reset();
SendCommand(POWER_ON);
WaitUntilIdle();
SendCommand(PANEL_SETTING);
SendData(0xaf); //KW-BF KWR-AF BWROTP 0f
SendCommand(PLL_CONTROL);
SendData(0x3a); //3A 100HZ 29 150Hz 39 200HZ 31 171HZ
SendCommand(POWER_SETTING);
SendData(0x03); // VDS_EN, VDG_EN
SendData(0x00); // VCOM_HV, VGHL_LV[1], VGHL_LV[0]
SendData(0x2b); // VDH
SendData(0x2b); // VDL
SendData(0x09); // VDHR
SendCommand(BOOSTER_SOFT_START);
SendData(0x07);
SendData(0x07);
SendData(0x17);
// Power optimization
SendCommand(0xF8);
SendData(0x60);
SendData(0xA5);
// Power optimization
SendCommand(0xF8);
SendData(0x89);
SendData(0xA5);
// Power optimization
SendCommand(0xF8);
SendData(0x90);
SendData(0x00);
// Power optimization
SendCommand(0xF8);
SendData(0x93);
SendData(0x2A);
// Power optimization
SendCommand(0xF8);
SendData(0x73);
SendData(0x41);
SendCommand(VCM_DC_SETTING_REGISTER);
SendData(0x12);
SendCommand(VCOM_AND_DATA_INTERVAL_SETTING);
SendData(0x87); // define by OTP
SetLut();
SendCommand(PARTIAL_DISPLAY_REFRESH);
SendData(0x00);
/* EPD hardware init end */
return 0;
}
/**
* @brief: basic function for sending commands
*/
void Epd::SendCommand(unsigned char command) {
DigitalWrite(dc_pin, LOW);
SpiTransfer(command);
}
/**
* @brief: basic function for sending data
*/
void Epd::SendData(unsigned char data) {
DigitalWrite(dc_pin, HIGH);
SpiTransfer(data);
}
/**
* @brief: Wait until the busy_pin goes HIGH
*/
void Epd::WaitUntilIdle(void) {
while(DigitalRead(busy_pin) == 0) { //0: busy, 1: idle
DelayMs(100);
}
}
/**
* @brief: module reset.
* often used to awaken the module in deep sleep,
* see Epd::Sleep();
*/
void Epd::Reset(void) {
DigitalWrite(reset_pin, HIGH);
DelayMs(200);
DigitalWrite(reset_pin, LOW);
DelayMs(10);
DigitalWrite(reset_pin, HIGH);
DelayMs(200);
}
/**
* @brief: set the look-up tables
*/
void Epd::SetLut(void) {
unsigned int count;
SendCommand(LUT_FOR_VCOM); //vcom
for(count = 0; count < 44; count++) {
SendData(lut_vcom_dc[count]);
}
SendCommand(LUT_WHITE_TO_WHITE); //ww --
for(count = 0; count < 42; count++) {
SendData(lut_ww[count]);
}
SendCommand(LUT_BLACK_TO_WHITE); //bw r
for(count = 0; count < 42; count++) {
SendData(lut_bw[count]);
}
SendCommand(LUT_WHITE_TO_BLACK); //wb w
for(count = 0; count < 42; count++) {
SendData(lut_bb[count]);
}
SendCommand(LUT_BLACK_TO_BLACK); //bb b
for(count = 0; count < 42; count++) {
SendData(lut_wb[count]);
}
}
/**
* @brief: transmit partial data to the SRAM
*/
void Epd::TransmitPartial(const unsigned char* buffer_black, const unsigned char* buffer_red, int x, int y, int w, int l) {
if (buffer_black != NULL) {
SendCommand(PARTIAL_DATA_START_TRANSMISSION_1);
SendData(x >> 8);
SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
SendData(y >> 8);
SendData(y & 0xff);
SendData(w >> 8);
SendData(w & 0xf8); // w (width) should be the multiple of 8, the last 3 bit will always be ignored
SendData(l >> 8);
SendData(l & 0xff);
DelayMs(2);
for(int i = 0; i < w / 8 * l; i++) {
SendData(buffer_black[i]);
}
DelayMs(2);
}
if (buffer_red != NULL) {
SendCommand(PARTIAL_DATA_START_TRANSMISSION_2);
SendData(x >> 8);
SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
SendData(y >> 8);
SendData(y & 0xff);
SendData(w >> 8);
SendData(w & 0xf8); // w (width) should be the multiple of 8, the last 3 bit will always be ignored
SendData(l >> 8);
SendData(l & 0xff);
DelayMs(2);
for(int i = 0; i < w / 8 * l; i++) {
SendData(buffer_red[i]);
}
DelayMs(2);
}
}
/**
* @brief: transmit partial data to the black part of SRAM
*/
void Epd::TransmitPartialBlack(const unsigned char* buffer_black, int x, int y, int w, int l) {
if (buffer_black != NULL) {
SendCommand(PARTIAL_DATA_START_TRANSMISSION_1);
SendData(x >> 8);
SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
SendData(y >> 8);
SendData(y & 0xff);
SendData(w >> 8);
SendData(w & 0xf8); // w (width) should be the multiple of 8, the last 3 bit will always be ignored
SendData(l >> 8);
SendData(l & 0xff);
DelayMs(2);
for(int i = 0; i < w / 8 * l; i++) {
SendData(buffer_black[i]);
}
DelayMs(2);
}
}
/**
* @brief: transmit partial data to the red part of SRAM
*/
void Epd::TransmitPartialRed(const unsigned char* buffer_red, int x, int y, int w, int l) {
if (buffer_red != NULL) {
SendCommand(PARTIAL_DATA_START_TRANSMISSION_2);
SendData(x >> 8);
SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
SendData(y >> 8);
SendData(y & 0xff);
SendData(w >> 8);
SendData(w & 0xf8); // w (width) should be the multiple of 8, the last 3 bit will always be ignored
SendData(l >> 8);
SendData(l & 0xff);
DelayMs(2);
for(int i = 0; i < w / 8 * l; i++) {
SendData(buffer_red[i]);
}
DelayMs(2);
}
}
/**
* @brief: refreshes a specific part of the display
*/
void Epd::RefreshPartial(int x, int y, int w, int l) {
SendCommand(PARTIAL_DISPLAY_REFRESH);
SendData(x >> 8);
SendData(x & 0xf8); // x should be the multiple of 8, the last 3 bit will always be ignored
SendData(y >> 8);
SendData(y & 0xff);
SendData(w >> 8);
SendData(w & 0xf8); // w (width) should be the multiple of 8, the last 3 bit will always be ignored
SendData(l >> 8);
SendData(l & 0xff);
WaitUntilIdle();
}
/**
* @brief: refresh and displays the frame
*/
void Epd::DisplayFrame(const unsigned char* frame_buffer_black, const unsigned char* frame_buffer_red) {
SendCommand(TCON_RESOLUTION);
SendData(width >> 8);
SendData(width & 0xff); //176
SendData(height >> 8);
SendData(height & 0xff); //264
if (frame_buffer_black != NULL) {
SendCommand(DATA_START_TRANSMISSION_1);
DelayMs(2);
for(int i = 0; i < width * height / 8; i++) {
SendData(pgm_read_byte(&frame_buffer_black[i]));
}
DelayMs(2);
}
if (frame_buffer_red != NULL) {
SendCommand(DATA_START_TRANSMISSION_2);
DelayMs(2);
for(int i = 0; i < width * height / 8; i++) {
SendData(pgm_read_byte(&frame_buffer_red[i]));
}
DelayMs(2);
}
SendCommand(DISPLAY_REFRESH);
WaitUntilIdle();
}
/**
* @brief: clear the frame data from the SRAM, this won't refresh the display
*/
void Epd::ClearFrame(void) {
SendCommand(TCON_RESOLUTION);
SendData(width >> 8);
SendData(width & 0xff); //176
SendData(height >> 8);
SendData(height & 0xff); //264
SendCommand(DATA_START_TRANSMISSION_1);
DelayMs(2);
for(int i = 0; i < width * height / 8; i++) {
SendData(0x00);
}
DelayMs(2);
SendCommand(DATA_START_TRANSMISSION_2);
DelayMs(2);
for(int i = 0; i < width * height / 8; i++) {
SendData(0x00);
}
DelayMs(2);
}
/**
* @brief: This displays the frame data from SRAM
*/
void Epd::DisplayFrame(void) {
SendCommand(DISPLAY_REFRESH);
WaitUntilIdle();
}
/**
* @brief: After this command is transmitted, the chip would enter the deep-sleep mode to save power.
* The deep sleep mode would return to standby by hardware reset. The only one parameter is a
* check code, the command would be executed if check code = 0xA5.
* You can use Epd::Reset() to awaken and use Epd::Init() to initialize.
*/
void Epd::Sleep() {
SendCommand(DEEP_SLEEP);
SendData(0xa5);
}
const unsigned char lut_vcom_dc[] =
{
0x00, 0x00,
0x00, 0x1A, 0x1A, 0x00, 0x00, 0x01,
0x00, 0x0A, 0x0A, 0x00, 0x00, 0x08,
0x00, 0x0E, 0x01, 0x0E, 0x01, 0x10,
0x00, 0x0A, 0x0A, 0x00, 0x00, 0x08,
0x00, 0x04, 0x10, 0x00, 0x00, 0x05,
0x00, 0x03, 0x0E, 0x00, 0x00, 0x0A,
0x00, 0x23, 0x00, 0x00, 0x00, 0x01
};
//R21H
const unsigned char lut_ww[] =
{
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
};
//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 */