add some paper api

docs/en/api/coreink/eink_api.md

@@ -20,6 +20,8 @@ Ink_Sprite InkPageSprite(&M5.M5Ink);
 
 **Description: create image area, configure whether to get image data buff from screen driver (default is to save true)**.
 
+?>The `x` coordinate of the >create image area must be an integer multiple of 8. (eg: 0 , 8 , 16...) Otherwise, the display will not work properly.
+
 **Example:**
 
 ```arduino

docs/en/api/coreink/system_api.md

@@ -82,8 +82,31 @@ M5.update();
 M5.Speaker.tone(2700);
 ```
 
+## RTC
+
 ?> Please use `M5.begin();` to initialize RTC related functions before using
 
+```
+typedef struct RTC_Time
+{
+    int8_t Hours;
+    int8_t Minutes;
+    int8_t Seconds;
+    RTC_Time() : Hours(),Minutes(),Seconds(){}
+    RTC_Time(int8_t h,int8_t m,int8_t s) : Hours(h),Minutes(m),Seconds(s){}
+} RTC_TimeTypeDef;
+
+typedef struct RTC_Date
+{
+    int8_t WeekDay;
+    int8_t Month;
+    int8_t Date;
+    int16_t Year;
+    RTC_Date() : WeekDay(),Month(),Date(),Year(){}
+    RTC_Date(int8_t w,int8_t m,int8_t d, int16_t y) : WeekDay(w),Month(m),Date(d),Year(y){}
+} RTC_DateTypeDef;
+```
+
 ## SetTime()
 
 **Syntax:**

docs/en/api/lcd.md

@@ -309,6 +309,7 @@ None
   M5.Lcd.drawBmpFile(SD, "/p2.bmp",0,0);
 ```
 
+?>We provide a script that can be used to convert `jpg` images -> `.c` files, you can use it to convert some personal images and draw them on the screen using the following API.[bin2code.py](https://github.com/m5stack/M5Stack/tree/master/tools)
 
 ## drawJpg()
 
@@ -1583,7 +1584,7 @@ M5.begin();
 M5.Lcd.drawCentreString("hello", 160, 0, 2);
 ```
 
-##drawRightString()
+## drawRightString()
 
 **Description:**
 
@@ -1612,7 +1613,7 @@ M5.begin();
 M5.Lcd.drawRightString("hello", 160, 0, 2);
 ```
 
-##int16_t fontHeight()
+## int16_t fontHeight()
 
 **Description:**