e-paper-display/bcm2835-1.71/e-Paper/Arduino/epd2in66b/epd2in66b.cpp

200 lines
5.5 KiB
C++

/**
* @filename : epd2in66b.cpp
* @brief : Implements for e-paper library
* @author : Waveshare
*
* Copyright (C) Waveshare Dec 02 2020
*
* 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 "epd2in66b.h"
#include "imagedata.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;
};
/**
* @brief: module reset.
* often used to awaken the module in deep sleep,
* see Epd::Sleep();
*/
static void Epd::Reset(void) {
DigitalWrite(reset_pin, HIGH);
DelayMs(200);
DigitalWrite(reset_pin, LOW); //module reset
DelayMs(2);
DigitalWrite(reset_pin, HIGH);
DelayMs(200);
}
/**
* @brief: Initialize the e-Paper register
*/
int Epd::Init(void) {
if (IfInit() != 0) {
return -1;
}
Reset();
WaitUntilIdle();
SendCommand(0x12);//soft reset
WaitUntilIdle();
/* Y increment, X increment */
SendCommand(0x11);
SendData(0x03);
/* Set RamX-address Start/End position */
SendCommand(0x44);
SendData(0x00);
SendData(((width-1) >> 3) & 0x1f);
/* Set RamY-address Start/End position */
SendCommand(0x45);
SendData(0);
SendData(0);
SendData((height&0xff));
SendData((height&0x100)>>8);
SendCommand(0x21); // Display update control
SendData(0x00);
SendData(0x80);
SendCommand(0x4E); // SET_RAM_X_ADDRESS_COUNTER
SendData(0x00);
SendCommand(0x4F); // SET_RAM_Y_ADDRESS_COUNTER
SendData(0x00);
SendData(0x00);
WaitUntilIdle();
return 0;
}
/**
* @brief: basic function for sending commands
*/
static void Epd::SendCommand(unsigned char command) {
DigitalWrite(dc_pin, LOW);
SpiTransfer(command);
}
/**
* @brief: basic function for sending data
*/
static void Epd::SendData(unsigned char data) {
DigitalWrite(dc_pin, HIGH);
SpiTransfer(data);
}
/**
* @brief: Wait until the busy_pin goes HIGH
*/
static void Epd::WaitUntilIdle(void) {
Serial.print("e-Paper busy \r\n ");
UBYTE busy;
do {
DelayMs(20);
busy = DigitalRead(busy_pin);
} while(busy);
DelayMs(20);
Serial.print("e-Paper busy release \r\n ");
}
/******************************************************************************
function : Turn On Display
parameter:
******************************************************************************/
static void Epd::TurnOnDisplay(void)
{
SendCommand(0x20);
WaitUntilIdle();
}
/******************************************************************************
function : Display Array data
******************************************************************************/
void Epd::DisplayFrame(const UBYTE *Image, const UBYTE *ImageRed) {
UWORD Width, Height;
Width = (width % 8 == 0)? (width / 8 ): (width / 8 + 1);
Height = height;
SendCommand(0x24);
for (UWORD j = 0; j <Height; j++) {
for (UWORD i = 0; i <Width; i++) {
SendData(pgm_read_byte(&Image[i + j * Width]));
}
}
SendCommand(0x26);
for (UWORD j = 0; j <Height; j++) {
for (UWORD i = 0; i <Width; i++) {
SendData(~pgm_read_byte(&ImageRed[i + j * Width]));
}
}
TurnOnDisplay();
}
/******************************************************************************
function : Clear Screen
parameter:
mode: 0:just partial mode
1:clear all
******************************************************************************/
void Epd::Clear(void) {
UWORD Width, Height;
Width = (width % 8 == 0)? (width / 8 ): (width / 8 + 1);
Height = height;
SendCommand(0x24);
for (UWORD j = 0; j <=Height; j++) {
for (UWORD i = 0; i < Width; i++) {
SendData(0xff);
}
}
SendCommand(0x26);
for (UWORD j = 0; j <=Height; j++) {
for (UWORD i = 0; i < Width; i++) {
SendData(0x00);
}
}
TurnOnDisplay();
}
/**
* @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
* You can use EPD_Reset() to awaken
*/
void Epd::Sleep(void) {
SendCommand(0X10);
SendData(0x01);
}
/* END OF FILE */