From ce29fad2c32c1a852fdfe21e428ee1dccc1c45a8 Mon Sep 17 00:00:00 2001
From: SSYYL <1032789891@qq.com>
Date: Wed, 29 Dec 2021 12:01:53 +0800
Subject: [PATCH] Added a function that can refresh only part of the screen
 area.

---
 Arduino/epd3in7/epd3in7.cpp                   | 411 ++++++++++--------
 Arduino/epd3in7/epd3in7.h                     |   1 +
 Arduino/epd3in7/epd3in7.ino                   |  76 ++--
 .../c/lib/e-Paper/EPD_3in7.c                  | 166 ++++---
 4 files changed, 357 insertions(+), 297 deletions(-)

diff --git a/Arduino/epd3in7/epd3in7.cpp b/Arduino/epd3in7/epd3in7.cpp
index fa9f9de..149662d 100644
--- a/Arduino/epd3in7/epd3in7.cpp
+++ b/Arduino/epd3in7/epd3in7.cpp
@@ -30,49 +30,63 @@
 
 static const UBYTE lut_4Gray_GC[] =
 {
-0x2A,0x06,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
-0x28,0x06,0x14,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//2
-0x20,0x06,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
-0x14,0x06,0x28,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//4
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
-0x00,0x02,0x02,0x0A,0x00,0x00,0x00,0x08,0x08,0x02,//6
-0x00,0x02,0x02,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,//7
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//8
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//10
-0x22,0x22,0x22,0x22,0x22
+    0x2A,0x06,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
+    0x28,0x06,0x14,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//2
+    0x20,0x06,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
+    0x14,0x06,0x28,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//4
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
+    0x00,0x02,0x02,0x0A,0x00,0x00,0x00,0x08,0x08,0x02,//6
+    0x00,0x02,0x02,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,//7
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//8
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//10
+    0x22,0x22,0x22,0x22,0x22
 };  
 
 static const UBYTE lut_1Gray_GC[] =
 {
-0x2A,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
-0x05,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//2
-0x2A,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
-0x05,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//4
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
-0x00,0x02,0x03,0x0A,0x00,0x02,0x06,0x0A,0x05,0x00,//6
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//7
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//8
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//10
-0x22,0x22,0x22,0x22,0x22
+    0x2A,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
+    0x05,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//2
+    0x2A,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
+    0x05,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//4
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
+    0x00,0x02,0x03,0x0A,0x00,0x02,0x06,0x0A,0x05,0x00,//6
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//7
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//8
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//10
+    0x22,0x22,0x22,0x22,0x22
 };  
 
 static const UBYTE lut_1Gray_DU[] =
 {
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
-0x01,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x0A,0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
-0x00,0x00,0x05,0x05,0x00,0x05,0x03,0x05,0x05,0x00,
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//7
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x22,0x22,0x22,0x22,0x22
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
+    0x01,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x0A,0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
+    0x00,0x00,0x05,0x05,0x00,0x05,0x03,0x05,0x05,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//7
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x22,0x22,0x22,0x22,0x22
 }; 
 
+static const UBYTE lut_1Gray_A2[] =
+{
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //1
+0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //2
+0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //3
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //4
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //5
+0x00,0x00,0x03,0x05,0x00,0x00,0x00,0x00,0x00,0x00, //6
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //7
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //8
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //9
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //10
+0x22,0x22,0x22,0x22,0x22
+}; 
 
 Epd::~Epd() {
 };
@@ -87,80 +101,80 @@ Epd::Epd() {
 };
 
 int Epd::Init(void) {
-  if (IfInit() != 0) {
-      return -1;
-  }
-  Reset();
+    if (IfInit() != 0) {
+        return -1;
+    }
+    Reset();
 
-  SendCommand(0x12);
-  DelayMs(300);
-  
-  SendCommand(0x46); 
-  SendData(0xF7);
-  WaitUntilIdle();
-  SendCommand(0x47);
-  SendData(0xF7);
-  WaitUntilIdle(); 
-  
-  SendCommand(0x01); // setting gaet number
-  SendData(0xDF);
-  SendData(0x01);
-  SendData(0x00);
+    SendCommand(0x12);
+    DelayMs(300);
 
-  SendCommand(0x03); // set gate voltage
-  SendData(0x00);
+    SendCommand(0x46); 
+    SendData(0xF7);
+    WaitUntilIdle();
+    SendCommand(0x47);
+    SendData(0xF7);
+    WaitUntilIdle(); 
 
-  SendCommand(0x04); // set source voltage
-  SendData(0x41);
-  SendData(0xA8);
-  SendData(0x32);
+    SendCommand(0x01); // setting gaet number
+    SendData(0xDF);
+    SendData(0x01);
+    SendData(0x00);
 
-  SendCommand(0x11); // set data entry sequence
-  SendData(0x03);
+    SendCommand(0x03); // set gate voltage
+    SendData(0x00);
 
-  SendCommand(0x3C); // set border 
-  SendData(0x00);
+    SendCommand(0x04); // set source voltage
+    SendData(0x41);
+    SendData(0xA8);
+    SendData(0x32);
 
-  SendCommand(0x0C); // set booster strength
-  SendData(0xAE);
-  SendData(0xC7);
-  SendData(0xC3);
-  SendData(0xC0);
-  SendData(0xC0);  
+    SendCommand(0x11); // set data entry sequence
+    SendData(0x03);
 
-  SendCommand(0x18); // set internal sensor on
-  SendData(0x80);
-   
-  SendCommand(0x2C); // set vcom value
-  SendData(0x44);
-  
-  SendCommand(0x37); // set display option, these setting turn on previous function
-  SendData(0x00);
-  SendData(0xff);
-  SendData(0xff);
-  SendData(0xff);
-  SendData(0xff);  
-  SendData(0x4f);
-  SendData(0xff);
-  SendData(0xff);
-  SendData(0xff);
-  SendData(0xff);  
+    SendCommand(0x3C); // set border 
+    SendData(0x00);
 
-  SendCommand(0x44); // setting X direction start/end position of RAM
-  SendData(0x00);
-  SendData(0x00);
-  SendData(0x17);
-  SendData(0x01);
+    SendCommand(0x0C); // set booster strength
+    SendData(0xAE);
+    SendData(0xC7);
+    SendData(0xC3);
+    SendData(0xC0);
+    SendData(0xC0);  
 
-  SendCommand(0x45); // setting Y direction start/end position of RAM
-  SendData(0x00);
-  SendData(0x00);
-  SendData(0xDF);
-  SendData(0x01);
+    SendCommand(0x18); // set internal sensor on
+    SendData(0x80);
 
-  SendCommand(0x22); // Display Update Control 2
-  SendData(0xCF);
-  return 0;
+    SendCommand(0x2C); // set vcom value
+    SendData(0x44);
+
+    SendCommand(0x37); // set display option, these setting turn on previous function
+    SendData(0x00);
+    SendData(0xff);
+    SendData(0xff);
+    SendData(0xff);
+    SendData(0xff);  
+    SendData(0x4f);
+    SendData(0xff);
+    SendData(0xff);
+    SendData(0xff);
+    SendData(0xff);  
+
+    SendCommand(0x44); // setting X direction start/end position of RAM
+    SendData(0x00);
+    SendData(0x00);
+    SendData(0x17);
+    SendData(0x01);
+
+    SendCommand(0x45); // setting Y direction start/end position of RAM
+    SendData(0x00);
+    SendData(0x00);
+    SendData(0xDF);
+    SendData(0x01);
+
+    SendCommand(0x22); // Display Update Control 2
+    SendData(0xCF);
+    return 0;
 }
 
 /**
@@ -183,15 +197,13 @@ void Epd::SendData(unsigned char data) {
  *  @brief: Wait until the busy_pin goes HIGH
  */
 void Epd::WaitUntilIdle(void) {
-  Serial.print("e-Paper busy \r\n ");
-  UBYTE busy;
-  do
-  {
-    busy = DigitalRead(busy_pin);
-  }
-  while(busy);    
-  DelayMs(200);
-  Serial.print("e-Paper busy release \r\n ");
+    Serial.print("e-Paper busy \r\n ");
+    UBYTE busy;
+    do {
+        busy = DigitalRead(busy_pin);
+    } while(busy);    
+    DelayMs(200);
+    Serial.print("e-Paper busy release \r\n ");
 }
 
 /**
@@ -200,78 +212,131 @@ void Epd::WaitUntilIdle(void) {
  *          see Epd::Sleep();
  */
 void Epd::Reset(void) {
-    DigitalWrite(reset_pin, LOW);                //module reset    
-    DelayMs(1);
     DigitalWrite(reset_pin, HIGH);
-    DelayMs(200);    
+    DelayMs(20);    
+    DigitalWrite(reset_pin, LOW);                //module reset    
+    DelayMs(2);
+    DigitalWrite(reset_pin, HIGH);
+    DelayMs(20);    
 }
 
 /******************************************************************************
 function :  Display
 ******************************************************************************/
 void Epd::DisplayFrame(const UBYTE *Image) {
-  UWORD i;
-  UWORD IMAGE_COUNTER = width * height / 8;
+    UWORD i;
+    UWORD IMAGE_COUNTER = width * height / 8;
 
-  SendCommand(0x4E);
-  SendData(0x00);
-  SendData(0x00);
-  SendCommand(0x4F);
-  SendData(0x00);
-  SendData(0x00);
+    SendCommand(0x4E);
+    SendData(0x00);
+    SendData(0x00);
+    SendCommand(0x4F);
+    SendData(0x00);
+    SendData(0x00);
 
-  SendCommand(0x24);
-  for (i = 0; i < IMAGE_COUNTER; i++)
-  {
-    SendData(pgm_read_byte(&Image[i]));
-  }
+    SendCommand(0x24);
+    for (i = 0; i < IMAGE_COUNTER; i++) {
+        SendData(pgm_read_byte(&Image[i]));
+    }
+    SendCommand(0x26);
+    for (i = 0; i < IMAGE_COUNTER; i++) {
+        SendData(pgm_read_byte(&Image[i]));
+    }
 
-  Load_LUT(1);
-  SendCommand(0x20);
-  WaitUntilIdle();  
+    Load_LUT(1);
+    SendCommand(0x20);
+    WaitUntilIdle();  
 }
 
 /******************************************************************************
 function :  Partial Display
+note:
+    1. iwidth must be a multiple of 8
+    2. The update will clear other parts of the image data
 ******************************************************************************/
 void Epd::DisplayFrame_Partial(const UBYTE *Image, UWORD Xstart, UWORD Ystart, UWORD iwidth, UWORD iheight) {
-  UWORD i, j;
-  SendCommand(0x4E);
-  SendData(0x00);
-  SendData(0x00);
-  SendCommand(0x4F);
-  SendData(0x00);
-  SendData(0x00);
+    UWORD i, j;
+    SendCommand(0x4E);
+    SendData(0x00);
+    SendData(0x00);
+    SendCommand(0x4F);
+    SendData(0x00);
+    SendData(0x00);
 
-  SendCommand(0x24);
-  for(i=0; i<EPD_WIDTH; i++) {
-    for(j=0; j<EPD_HEIGHT/8; j++) {
-      if(i>=Ystart && i<Ystart+iheight && j>=Xstart/8 && j<(Xstart+iwidth)/8)
-        SendData(Image[(j-Xstart/8) + (i-Ystart)*iwidth/8]);
-       else
-        SendData(0xff);
+    SendCommand(0x24);
+    for(i=0; i<EPD_WIDTH; i++) {
+        for(j=0; j<EPD_HEIGHT/8; j++) {
+            if(i>=Ystart && i<Ystart+iheight && j>=Xstart/8 && j<(Xstart+iwidth)/8)
+                SendData(Image[(j-Xstart/8) + (i-Ystart)*iwidth/8]);
+            else
+                SendData(0xff);
+        }
     }
-  }
-  
-  Load_LUT(0);
-  SendCommand(0x20);
-  WaitUntilIdle();   
+
+    Load_LUT(0);
+    SendCommand(0x20);
+    WaitUntilIdle();   
 }
 
+/******************************************************************************
+function :  Sends part the image buffer in RAM to e-Paper and displays
+notes:
+    1. Xstart must be a multiple of 8
+    1. isGC: use GC mode to clear base-image
+******************************************************************************/
+void Epd::DisplayFrame_Part(const UBYTE *Image, UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, bool isGC)
+{
+	UWORD i, Width;
+	Width = (Xend-Xstart)%8 == 0 ? (Xend-Xstart)/8 : (Xend-Xstart)/8+1;
+    UWORD IMAGE_COUNTER = Width * (Yend-Ystart);
+
+	Xend -= 1;
+	Yend -= 1;
+
+	SendCommand(0x44);
+	SendData(Xstart & 0xff);
+	SendData((Xstart>>8) & 0x03);
+	SendData(Xend & 0xff);
+	SendData((Xend>>8) & 0x03);
+	SendCommand(0x45);
+	SendData(Ystart & 0xff);
+	SendData((Ystart>>8) & 0x03);
+	SendData(Yend & 0xff);
+	SendData((Yend>>8) & 0x03);
+
+    SendCommand(0x4E); // SET_RAM_X_ADDRESS_COUNTER
+    SendData(Xstart & 0xFF);
+
+    SendCommand(0x4F); // SET_RAM_Y_ADDRESS_COUNTER
+    SendData(Ystart & 0xFF);
+    SendData((Ystart >> 8) & 0xFF);
+	
+	SendCommand(0x24);
+    for (i = 0; i < IMAGE_COUNTER; i++)
+	{
+	    SendData(Image[i]);
+	}
+    if(isGC)
+        Load_LUT(1);
+    else
+        Load_LUT(0);
+	SendCommand(0x20);
+	WaitUntilIdle();    
+}
 
 /******************************************************************************
 function :  set the look-up tables
 parameter:
 ******************************************************************************/
 void Epd::Load_LUT(UBYTE mode) {
-  UWORD i;
-  SendCommand(0x32);
-  for (i = 0; i < 105; i++) {
-    if(mode == 1)
-      SendData(lut_1Gray_GC[i]);
-    else if(mode == 0)
-      SendData(lut_1Gray_DU[i]);
-  }   
+    UWORD i;
+    SendCommand(0x32);
+    for (i = 0; i < 105; i++) {
+        if(mode == 1)
+            SendData(lut_1Gray_GC[i]);
+        else if(mode == 0)
+            SendData(lut_1Gray_A2[i]);
+    }   
 }
 
 /******************************************************************************
@@ -281,28 +346,27 @@ parameter:
         1:clear all
 ******************************************************************************/
 void Epd::Clear(UBYTE mode) {
-  UWORD i;
-  UWORD IMAGE_COUNTER = width * height / 8;
+    UWORD i;
+    UWORD IMAGE_COUNTER = width * height / 8;
 
-  SendCommand(0x4E);
-  SendData(0x00);
-  SendData(0x00);
-  SendCommand(0x4F);
-  SendData(0x00);
-  SendData(0x00);
-
-  SendCommand(0x24);
-  for (i = 0; i < IMAGE_COUNTER; i++)
-  {
-    SendData(0xff);
-  }
-  if(mode)
-    Load_LUT(1);
-   else
-    Load_LUT(0); 
-  SendCommand(0x20);
-  WaitUntilIdle();   
+    SendCommand(0x4E);
+    SendData(0x00);
+    SendData(0x00);
+    SendCommand(0x4F);
+    SendData(0x00);
+    SendData(0x00);
 
+    SendCommand(0x24);
+    for (i = 0; i < IMAGE_COUNTER; i++)
+    {
+        SendData(0xff);
+    }
+    if(mode)
+        Load_LUT(1);
+    else
+        Load_LUT(0); 
+    SendCommand(0x20);
+    WaitUntilIdle();   
 }
 
 /**
@@ -319,7 +383,4 @@ void Epd::Sleep(void) {
     SendCommand(0X07);   //deep sleep
     SendData(0xA5);
 }
-
-
-
 /* END OF FILE */
diff --git a/Arduino/epd3in7/epd3in7.h b/Arduino/epd3in7/epd3in7.h
index 16d0568..ab9357f 100644
--- a/Arduino/epd3in7/epd3in7.h
+++ b/Arduino/epd3in7/epd3in7.h
@@ -47,6 +47,7 @@ public:
     void DisplayFrame(const UBYTE *Image);
     void SendCommand(unsigned char command);
     void DisplayFrame_Partial(const UBYTE *Image, UWORD Xstart, UWORD Ystart, UWORD iwidth, UWORD iheight);
+    void DisplayFrame_Part(const UBYTE *Image, UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend, bool isGC);
     void SendData(unsigned char data);
     void Sleep(void);
     void Clear(UBYTE mode);
diff --git a/Arduino/epd3in7/epd3in7.ino b/Arduino/epd3in7/epd3in7.ino
index 235a2d9..ca14fe4 100644
--- a/Arduino/epd3in7/epd3in7.ino
+++ b/Arduino/epd3in7/epd3in7.ino
@@ -32,51 +32,55 @@
 #define COLORED     0
 #define UNCOLORED   1
 
-UBYTE image[800];
+UBYTE image[700];
 Paint paint(image, 0, 0);    // width should be the multiple of 8 
 UDOUBLE time_start_ms;
 UDOUBLE time_now_s;
 
 void setup() {
-  // put your setup code here, to run once:
-  Serial.begin(115200);
-  Epd epd;
-  if (epd.Init() != 0) {
-    Serial.print("e-Paper init failed");
-    return;
-  }
-  Serial.print("3.7inch e-paper demo\r\n ");
-  Serial.print("e-Paper Clear\r\n ");
-  epd.Clear(1);  
-  Serial.print("draw image\r\n ");
-  epd.DisplayFrame(IMAGE_DATA);
-  delay(4000);
-  epd.Clear(0);
-  
-  UBYTE i;
-  time_start_ms = millis();
-  for(i=0; i<10; i++) {
-    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(48);
-    paint.SetHeight(100);
+    // put your setup code here, to run once:
+    Serial.begin(115200);
+    Epd epd;
+    if (epd.Init() != 0) {
+        Serial.print("e-Paper init failed");
+        return;
+    }
+    Serial.print("3.7inch e-paper demo\r\n ");
+    Serial.print("e-Paper Clear\r\n ");
+    epd.Clear(1);  
+    Serial.print("draw image\r\n ");
+    epd.DisplayFrame(IMAGE_DATA);   // Set base image
+    delay(3000);
+    
+    paint.SetWidth(40);
+    paint.SetHeight(120);
     paint.SetRotate(ROTATE_270);
     paint.Clear(UNCOLORED);
-    paint.DrawStringAt(20, 10, time_string, &Font16, COLORED);
-    Serial.print("refresh------\r\n ");
-    epd.DisplayFrame_Partial(paint.GetImage(), 20, 100, 48, 100);
-  }
-  
-  Serial.print("clear and sleep......\r\n ");
-  epd.Clear(1);
-  epd.Sleep();
+
+    UBYTE i;
+    time_start_ms = millis();
+    for(i=0; i<10; i++) {
+        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.Clear(UNCOLORED);
+        paint.DrawStringAt(20, 10, time_string, &Font16, COLORED);
+        Serial.print("refresh------\r\n ");
+        // epd.DisplayFrame_Partial(paint.GetImage(), 20, 100, 40, 120); // Width must be a multiple of 8
+        epd.DisplayFrame_Part(paint.GetImage(), 40, 30, 80, 140, false);   // Xstart must be a multiple of 8
+    }
+    
+    Serial.print("clear and sleep......\r\n ");
+    epd.Init();
+    epd.Clear(1);
+    epd.Sleep();
 }
 
 void loop() {
-  // put your main code here, to run repeatedly:
+    // put your main code here, to run repeatedly:
 
 }
diff --git a/RaspberryPi_JetsonNano/c/lib/e-Paper/EPD_3in7.c b/RaspberryPi_JetsonNano/c/lib/e-Paper/EPD_3in7.c
index e8086e5..673d9b1 100644
--- a/RaspberryPi_JetsonNano/c/lib/e-Paper/EPD_3in7.c
+++ b/RaspberryPi_JetsonNano/c/lib/e-Paper/EPD_3in7.c
@@ -33,62 +33,62 @@
 
 static const UBYTE lut_4Gray_GC[] =
 {
-0x2A,0x06,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
-0x28,0x06,0x14,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//2
-0x20,0x06,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
-0x14,0x06,0x28,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//4
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
-0x00,0x02,0x02,0x0A,0x00,0x00,0x00,0x08,0x08,0x02,//6
-0x00,0x02,0x02,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,//7
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//8
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//10
-0x22,0x22,0x22,0x22,0x22
+    0x2A,0x06,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
+    0x28,0x06,0x14,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//2
+    0x20,0x06,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
+    0x14,0x06,0x28,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//4
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
+    0x00,0x02,0x02,0x0A,0x00,0x00,0x00,0x08,0x08,0x02,//6
+    0x00,0x02,0x02,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,//7
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//8
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//10
+    0x22,0x22,0x22,0x22,0x22
 };	
 
 static const UBYTE lut_1Gray_GC[] =
 {
-0x2A,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
-0x05,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//2
-0x2A,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
-0x05,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//4
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
-0x00,0x02,0x03,0x0A,0x00,0x02,0x06,0x0A,0x05,0x00,//6
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//7
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//8
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//10
-0x22,0x22,0x22,0x22,0x22
+    0x2A,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
+    0x05,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//2
+    0x2A,0x15,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
+    0x05,0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//4
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
+    0x00,0x02,0x03,0x0A,0x00,0x02,0x06,0x0A,0x05,0x00,//6
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//7
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//8
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//10
+    0x22,0x22,0x22,0x22,0x22
 };  
 
 static const UBYTE lut_1Gray_DU[] =
 {
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
-0x01,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x0A,0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
-0x00,0x00,0x05,0x05,0x00,0x05,0x03,0x05,0x05,0x00,
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//7
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-0x22,0x22,0x22,0x22,0x22
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//1
+    0x01,0x2A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x0A,0x55,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//3
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//5
+    0x00,0x00,0x05,0x05,0x00,0x05,0x03,0x05,0x05,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//7
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//9
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+    0x22,0x22,0x22,0x22,0x22
 }; 
 
 static const UBYTE lut_1Gray_A2[] =
 {
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //1
-0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //2
-0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //3
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //4
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //5
-0x00,0x00,0x03,0x05,0x00,0x00,0x00,0x00,0x00,0x00, //6
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //7
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //8
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //9
-0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //10
-0x22,0x22,0x22,0x22,0x22
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //1
+    0x0A,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //2
+    0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //3
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //4
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //5
+    0x00,0x00,0x03,0x05,0x00,0x00,0x00,0x00,0x00,0x00, //6
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //7
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //8
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //9
+    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, //10
+    0x22,0x22,0x22,0x22,0x22
 }; 
 
 /******************************************************************************
@@ -150,8 +150,7 @@ void EPD_3IN7_Load_LUT(UBYTE lut)
 {
   UWORD i;
   EPD_3IN7_SendCommand(0x32);
-  for (i = 0; i < 105; i++)
-  {
+  for (i = 0; i < 105; i++) {
     if(lut == 0)
         EPD_3IN7_SendData(lut_4Gray_GC[i]);
     else if(lut == 1)
@@ -376,26 +375,25 @@ parameter:
 ******************************************************************************/
 void EPD_3IN7_1Gray_Clear(void)
 {
-  UWORD i;
-  UWORD IMAGE_COUNTER = EPD_3IN7_WIDTH * EPD_3IN7_HEIGHT / 8;
+    UWORD i;
+    UWORD IMAGE_COUNTER = EPD_3IN7_WIDTH * EPD_3IN7_HEIGHT / 8;
 
-  EPD_3IN7_SendCommand(0x4E);
-  EPD_3IN7_SendData(0x00);
-  EPD_3IN7_SendData(0x00);
-  EPD_3IN7_SendCommand(0x4F);
-  EPD_3IN7_SendData(0x00);
-  EPD_3IN7_SendData(0x00);
+    EPD_3IN7_SendCommand(0x4E);
+    EPD_3IN7_SendData(0x00);
+    EPD_3IN7_SendData(0x00);
+    EPD_3IN7_SendCommand(0x4F);
+    EPD_3IN7_SendData(0x00);
+    EPD_3IN7_SendData(0x00);
 
-  EPD_3IN7_SendCommand(0x24);
-  for (i = 0; i < IMAGE_COUNTER; i++)
-  {
-    EPD_3IN7_SendData(0xff);
-  }
-  
-  EPD_3IN7_Load_LUT(2);
-  
-  EPD_3IN7_SendCommand(0x20);
-  EPD_3IN7_ReadBusy_HIGH();    
+    EPD_3IN7_SendCommand(0x24);
+    for (i = 0; i < IMAGE_COUNTER; i++) {
+        EPD_3IN7_SendData(0xff);
+    }
+
+    EPD_3IN7_Load_LUT(2);
+
+    EPD_3IN7_SendCommand(0x20);
+    EPD_3IN7_ReadBusy_HIGH();    
 }
 
 /******************************************************************************
@@ -518,33 +516,30 @@ parameter:
 ******************************************************************************/
 void EPD_3IN7_1Gray_Display(const UBYTE *Image)
 {
-  UWORD i;
-  UWORD IMAGE_COUNTER = EPD_3IN7_WIDTH * EPD_3IN7_HEIGHT / 8;
+    UWORD i;
+    UWORD IMAGE_COUNTER = EPD_3IN7_WIDTH * EPD_3IN7_HEIGHT / 8;
 
-  EPD_3IN7_SendCommand(0x4E);
-  EPD_3IN7_SendData(0x00);
-  EPD_3IN7_SendData(0x00);
-  EPD_3IN7_SendCommand(0x4F);
-  EPD_3IN7_SendData(0x00);
-  EPD_3IN7_SendData(0x00);
+    EPD_3IN7_SendCommand(0x4E);
+    EPD_3IN7_SendData(0x00);
+    EPD_3IN7_SendData(0x00);
+    EPD_3IN7_SendCommand(0x4F);
+    EPD_3IN7_SendData(0x00);
+    EPD_3IN7_SendData(0x00);
 
-  EPD_3IN7_SendCommand(0x24);
-  for (i = 0; i < IMAGE_COUNTER; i++)
-  {
-    EPD_3IN7_SendData(Image[i]);
-  }
+    EPD_3IN7_SendCommand(0x24);
+    for (i = 0; i < IMAGE_COUNTER; i++) {
+        EPD_3IN7_SendData(Image[i]);
+    }
 
-  EPD_3IN7_Load_LUT(2);
-  EPD_3IN7_SendCommand(0x20);
-  EPD_3IN7_ReadBusy_HIGH();  
+    EPD_3IN7_Load_LUT(2);
+    EPD_3IN7_SendCommand(0x20);
+    EPD_3IN7_ReadBusy_HIGH();  
 }
 
 /******************************************************************************
 function :  Sends part the image buffer in RAM to e-Paper and displays
 notes:
-    You can send a part of data to e-Paper,But this function is not recommended
-    1.Xsize must be as big as EPD_3IN7_WIDTH
-    2.Ypointer must be start at 0
+    Xstart must be a multiple of 8
 ******************************************************************************/
 void EPD_3IN7_1Gray_Display_Part(const UBYTE *Image, UWORD Xstart, UWORD Ystart, UWORD Xend, UWORD Yend)
 {
@@ -574,9 +569,8 @@ void EPD_3IN7_1Gray_Display_Part(const UBYTE *Image, UWORD Xstart, UWORD Ystart,
     EPD_3IN7_SendData((Ystart >> 8) & 0xFF);
 	
 	EPD_3IN7_SendCommand(0x24);
-	for (i = 0; i < IMAGE_COUNTER; i++)
-	{
-	EPD_3IN7_SendData(Image[i]);
+	for (i = 0; i < IMAGE_COUNTER; i++) {
+	    EPD_3IN7_SendData(Image[i]);
 	}
 
 	EPD_3IN7_Load_LUT(3);