e-paper-display/bcm2835-1.71/e-Paper/Arduino/epd7in5b_V2/epd7in5b_V2.cpp

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2024-01-31 22:04:09 +00:00
/**
* @filename : epd7in5b_V2.cpp
* @brief : Implements for e-paper library
* @author : Yehui from Waveshare
*
* Copyright (C) Waveshare Nov 30 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 "epd7in5b_V2.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) {
if (IfInit() != 0) {
return -1;
}
Reset();
SendCommand(0x01); //POWER SETTING
SendData(0x07);
SendData(0x07); //VGH=20V,VGL=-20V
SendData(0x3f); //VDH=15V
SendData(0x3f); //VDL=-15V
SendCommand(0x04); //POWER ON
DelayMs(100);
WaitUntilIdle();
SendCommand(0X00); //PANNEL SETTING
SendData(0x0F); //KW-3f KWR-2F BWROTP 0f BWOTP 1f
SendCommand(0x61); //tres
SendData(0x03); //source 800
SendData(0x20);
SendData(0x01); //gate 480
SendData(0xE0);
SendCommand(0X15);
SendData(0x00);
SendCommand(0X50); //VCOM AND DATA INTERVAL SETTING
SendData(0x11);
SendData(0x07);
SendCommand(0X60); //TCON SETTING
SendData(0x22);
SendCommand(0x65); // Resolution setting
SendData(0x00);
SendData(0x00);//800*480
SendData(0x00);
SendData(0x00);
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) {
unsigned char busy;
do {
SendCommand(0x71);
busy = DigitalRead(busy_pin);
busy =!(busy & 0x01);
}while(busy);
DelayMs(200);
}
/**
* @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); //module reset
DelayMs(2);
DigitalWrite(reset_pin, HIGH);
DelayMs(200);
}
void Epd::Displaypart(const unsigned char* pbuffer, unsigned long xStart, unsigned long yStart,\
unsigned long Picture_Width, unsigned long Picture_Height, unsigned char Block) {
if(Block == 0){
SendCommand(0x10);
}else if(Block == 1){
SendCommand(0x13);
}
for (unsigned long j = 0; j < height; j++) {
for (unsigned long i = 0; i < width/8; i++) {
if( (j>=yStart) && (j<yStart+Picture_Height) && (i*8>=xStart) && (i*8<xStart+Picture_Width)){
if(Block == 0){
SendData((pgm_read_byte(&(pbuffer[i-xStart/8 + (Picture_Width)/8*(j-yStart)]))) );
}else{
SendData(~(pgm_read_byte(&(pbuffer[i-xStart/8 + (Picture_Width)/8*(j-yStart)]))) );
}
}else {
if(Block == 0){
SendData(0xff);
}else {
SendData(0x00);
}
}
}
}
if(Block == 1){
SendCommand(0x12);
DelayMs(100);
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
*/
void Epd::Sleep(void) {
SendCommand(0X02);
WaitUntilIdle();
SendCommand(0X07);
SendData(0xa5);
}
/* END OF FILE */