//Most Important Import
#include <SPI.h>

#include "Display_EPD_W21_spi.h"
#include "Display_EPD_W21.h"
#include "frame.h"
#include "GUI_Paint.h"
#include "font.h"

#if 1
unsigned char BlackImage[EPD_ARRAY]; //Define canvas space  
#endif

//Most Important Part
void setup() {
  pinMode(D5, INPUT); //BUSY
  pinMode(D0, OUTPUT); //RES 
  pinMode(D3, OUTPUT); //DC   
  pinMode(D1, OUTPUT); //CS  

  //SPI
  SPI.beginTransaction(SPISettings(10000000, MSBFIRST, SPI_MODE0));
  SPI.begin();

  Serial.begin(9600);
  Serial.print(111);
}

//Tips//
/*
1.Flickering is normal when EPD is performing a full screen update to clear ghosting from the previous image so to ensure better clarity and legibility for the new image.
2.There will be no flicker when EPD performs a partial refresh.
3.Please make sue that EPD enters sleep mode when refresh is completed and always leave the sleep mode command. Otherwise, this may result in a reduced lifespan of EPD.
4.Please refrain from inserting EPD to the FPC socket or unplugging it when the MCU is being powered to prevent potential damage.)
5.Re-initialization is required for every full screen update.
6.When porting the program, set the BUSY pin to input mode and other pins to output mode.
*/

void loop() {
  Serial.print(111);
  
  #if 1 //Partial refresh demostration.

  EPD_Init_Fast(); //Full screen refresh initialization.
  EPD_WhiteScreen_White(); //Clear screen function.
  EPD_DeepSleep(); //Enter the sleep mode and please do not delete it, otherwise it will reduce the lifespan of the screen.
  delay(2000); //Delay for 2s.	
  //Partial refresh demo support displaying a clock at 5 locations with 00:00.  If you need to perform partial refresh more than 5 locations, please use the feature of using partial refresh at the full screen demo.
  //After 5 partial refreshes, implement a full screen refresh to clear the ghosting caused by partial refreshes.
  //////////////////////Partial refresh time/////////////////////////////////////
  Paint_NewImage(BlackImage, EPD_WIDTH, EPD_HEIGHT, 0, WHITE); //Set canvas parameters, GUI image rotation, please change 0 to 0/90/180/270.
  Paint_SelectImage(BlackImage); //Select current settings.	
  EPD_Init(); //Full screen refresh initialization.
  Paint_Clear(WHITE); //Clear canvas.
  const char * Message = "Welcome to Kalisto";
  Paint_DrawString_EN(400 - (((strlen(Message) * 32) / 2)), 240 - (64 / 2), Message, & Font64, WHITE, BLACK);
  EPD_Display(BlackImage); //Display GUI image.
  EPD_DeepSleep(); //EPD_DeepSleep,Sleep instruction is necessary, please do not delete!!!
  delay(20000); //Delay for 2s. 		

  // Full screen update clear the screen.
  EPD_Init(); //Full screen refresh initialization.
  EPD_WhiteScreen_White(); //Clear screen function.
  EPD_DeepSleep(); //Enter the sleep mode and please do not delete it, otherwise it will reduce the lifespan of the screen.
  delay(2000); //Delay for 2s.	

  #endif

  delay(300000); // The program stops here   
}