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 # omnicrystal
-English version (TODO)
+[English version](https://github.com/RecursiveError/omnicrystal/blob/main/README_EN.md)
 
 Biblioteca modular para LCD alfanuméricos compatíveis com HITACHI HD44780 feita com CoreArduino
 
diff --git a/README_EN.md b/README_EN.md
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+# omnicrystal
+
+Modular library for alphanumeric LCD compatible with HITACHI HD44780 made with CoreArduino
+
+This Library allows the user to choose and create the communication interface with the LCD display, This Library comes with two interfaces by default: parallel and PCF8754(Wire)
+
+(PCF6754 IS NOT IMPLEMENTED FOR PLATFORM WITHOUT I2C SUPPORT, use softI2C example on these platforms)
+
+### Creating your own interface 
+to create your own interface is very simple, just implement the "LCDInterface" interface with the public send function.
+
+The "send" function receives two uint8_t parameters, "data" and "config", in which their Bits represent:
+
+| BITS | BIT7 | BIT6 |BIT5| BIT4| BIT3| BIT2| BIT1| BIT0|
+| :------ | :------ | :------|  :------| :------| :------| :------| :------| :------|
+| DATA | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
+| CONFIG | Reserved | Reserved | Reserved | Reserved | EN2 | EN | RW | RS |
+
+the state of each bit represents the state of the port: 1 == HIGH | 0 == LOW
+
+connect each bit to its respective port and that's it you already have a functional interface
+(to work with PCF8754 you can copy this line ```uint8_t package = (config & 0b00000111) | (data & 0xF0) | 0x08; ``` and send it through I2C library of your choice)
+
+#### example soft_i2c
+```c++
+/*soft_i2c cunstom interface Exemple
+Author: Guilherme Silva Schultz
+Data: 2023-03-22
+
+this example uses the library:
+https://github.com/felias-fogg/SoftI2CMaster
+
+*/
+
+//made to run on arduino uno
+//change settings according to your board
+
+//Arduino Uno pin 13
+#define SCL_PIN 5
+#define SCL_PORT PORTB
+
+//Arduino Uno pin 12
+#define SDA_PIN 4
+#define SDA_PORT PORTB
+
+#include <omnicrystal.h>
+#include <SoftI2CMaster.h>
+
+//Implements LCDinterface
+class LCDPCF8754_SOFT : public LCDInterface{
+  private:
+    const uint8_t _addr;
+  public:
+    LCDPCF8754_SOFT(const uint8_t addr) : _addr{addr}
+    {i2c_init();}
+    void send(uint8_t config, uint8_t data){
+      /*
+      The first 3 Low Bits of PCF8754 correspond respectively
+      RS - R/W - EN
+
+      0x08 is the backlight
+
+      the last 4 high bits correspond to the data pins
+      */
+      uint8_t package = (config & 0b00000111) | (data & 0xF0) | 0x08;
+      i2c_start((_addr<<1)|I2C_WRITE);
+      i2c_write(package);
+      i2c_stop();
+  }
+};
+
+//that's all you need to create a custom interface, now just use it.
+LCDPCF8754_SOFT interface(0x27);
+Omnicrystal lcd(interface, Bus4Bits, 2, 16);
+
+void setup() {
+  lcd.begin();
+  lcd.print("hello SoftI2C!!");
+}
+
+void loop() {
+}
+
+```