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/*demo for MH-ET LVIE 1.54 Black Epaper
*Set the toggle switch to the correct gear position according to the supply voltage.
*SPI:4line-wire
*EPD Pin(s) definition hardcoded in library
* RST_PIN   8
* DC_PIN    9
* CS_PIN    10
* BUSY_PIN  7
* Board specific PIN(s)
* SDI_PIN   51
* SCLK_PIN  52
*/

#include <epd1in54.h>
#include <epdpaint.h>
#include "imagedata.h"

#define WHITE       1
#define BLACK       0


/**
  * Due to RAM not enough in Arduino UNO or NANO a pattern buffer is not allowed.
  * In this case, a smaller image buffer is allocated and you have to 
  * update a partial display several times.
  * 1 byte = 8 pixels, therefore you have to set 8*N pixels at a time.
  */
unsigned char image[1024];
Paint paint(image, 0, 0);    // width should be the multiple of 8 
Epd epd;
unsigned long time_start_ms;
unsigned long time_now_s;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  if (epd.Init(lut_full_update) != 0) {
      Serial.print("e-Paper init failed");
      return;
  }
      Serial.print("e-Paper init");
  /** 
   *  there are 2 memory areas embedded in the e-paper display
   *  and once the display is refreshed, the memory area will be auto-toggled,
   *  i.e. the next action of SetPatternMemory will set the other memory area
   *  therefore you have to clear the pattern memory twice.
   */
  epd.ClearPatternMemory(0xFF);   // bit set = white, bit reset = black
  epd.DisplayPattern();
  epd.ClearPatternMemory(0xFF);   // bit set = white, bit reset = black
  epd.DisplayPattern();

  paint.SetRotate(ROTATE_0);
  paint.SetWidth(200);
  paint.SetHeight(24);

  /* For simplicity, the arguments are explicit numerical coordinates */
  paint.Clear(BLACK);
  paint.DrawStringAt(30, 4, "Hello world!", &Font16, WHITE);
  epd.SetPatternMemory(paint.GetImage(), 0, 10, paint.GetWidth(), paint.GetHeight());
  
  paint.Clear(WHITE);
  paint.DrawStringAt(16, 4, "---MH---", &Font24, BLACK);
  epd.SetPatternMemory(paint.GetImage(), 0, 30, paint.GetWidth(), paint.GetHeight());

  paint.SetWidth(64);
  paint.SetHeight(64);
  
  paint.Clear(WHITE);
  paint.DrawRectangle(0, 0, 40, 50, BLACK);
  paint.DrawLine(0, 0, 40, 50, BLACK);
  paint.DrawLine(40, 0, 0, 50, BLACK);
  epd.SetPatternMemory(paint.GetImage(), 16, 60, paint.GetWidth(), paint.GetHeight());

  paint.Clear(WHITE);
  paint.DrawCircle(32, 32, 30, BLACK);
  epd.SetPatternMemory(paint.GetImage(), 120, 60, paint.GetWidth(), paint.GetHeight());

  paint.Clear(WHITE);
  paint.DrawFilledRectangle(0, 0, 40, 50, BLACK);
  epd.SetPatternMemory(paint.GetImage(), 16, 130, paint.GetWidth(), paint.GetHeight());

  paint.Clear(WHITE);
  paint.DrawFilledCircle(32, 32, 30, BLACK);
  epd.SetPatternMemory(paint.GetImage(), 120, 130, paint.GetWidth(), paint.GetHeight());
  epd.DisplayPattern();

  delay(2000);

  epd.SetPatternMemory(IMAGE_DATA);
  epd.DisplayPattern();
  
  if (epd.Init(lut_partial_update) != 0) {
      Serial.print("e-Paper init failed");
      return;
  }
 delay(2000);
  /** 
   *  there are 2 memory areas embedded in the e-paper display
   *  and once the display is refreshed, the memory area will be auto-toggled,
   *  i.e. the next action of SetPatternMemory will set the other memory area
   *  therefore you have to set the pattern memory and refresh the display twice.
   */
  epd.ClearPatternMemory(0xFF);   // bit set = white, bit reset = black
  epd.DisplayPattern();
  epd.ClearPatternMemory(0xFF);   // bit set = white, bit reset = black
  epd.DisplayPattern();
   delay(2000);
  time_start_ms = millis();
}

void loop() {
  // put your main code here, to run repeatedly:
  time_now_s = (millis() - time_start_ms) / 1000;
  char time_string[] = {'0', '0', ':', '0', '0', '\0'};
  time_string[0] = time_now_s / 60 / 10 + '0';
  time_string[1] = time_now_s / 60 % 10 + '0';
  time_string[3] = time_now_s % 60 / 10 + '0';
  time_string[4] = time_now_s % 60 % 10 + '0';

  paint.SetWidth(90);
  paint.SetHeight(32);
  paint.SetRotate(ROTATE_0);
  
 
  paint.Clear(WHITE);
  paint.DrawStringAt(0, 4, time_string, &Font24, BLACK);
  epd.SetPatternMemory(paint.GetImage(), 8, 128, paint.GetWidth(), paint.GetHeight());
  epd.DisplayPattern();
  Serial.println(time_string);
  delay(500);
}