dddddddddddddddddddddddddddddddddddddddd/     
      ddddddddddddddddddMMMMdddddddddddddddddd/     
      ``````````````````NMMM``````````````````      
   ---------------------NMMM---------------------`  
  `NNNNNNNNNNNNNNNNNNNNNMMMMNNNNNNNNNNNNNNNNNNNNNo  
  `MMMmoooooooooooooooooNMMMooooooooooooooooosMMMs  
  `MMMy                 NMMM                 -MMMs  
  `MMMy  /hhhhhhhhhhh`  NMMM   hhhhhhhhhhhs  -MMMs  
  `MMMy  /hhhhhhhhhhh`  NMMM   hhhhhhhhhhhs  -MMMs  
  `mmms                 NMMM                 -mmmo  
        /ssssssssssss`  NMMM   sssssssssssss.       
        sNNNNNNNNNNNN`  NMMM   NNNNNNNNNNNNN-       
                        oooo                        
        ::::::::::::::::::::::::::::::::::::`       
       `MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM/       
        ////////////////////////////////////.       
                                                    
 -yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyo 
 :MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMd 
  ````````````-NMMMd.```````````-ohNh+.```````````` 
             :NMMMo`            `+hMMMNy:`          
            +NMMm:             ````-sNMMMmo.        
    .yyyyyydMMMMmdddddmmmmmmmmmmmmNNNMMMMMMNh:      
    `MMMMMMMNNNNNNNmmmmmmddddddhhhhhhyyyyymMMMd/    
     ---............`````````````         `+mds:    
                                            ``      
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# 2014-09-24 | Raspberry PI + YwRobot Arduino LCM1602 IIC V1 HD44780 LCD
{

  

  Finally i have some time to write a new post.

  Let's start:
  I bought a YwRobot Arduino LCM1602 IIC V1 HD44780 LCD from Amazon for 6,57 EUR

  It has a I2C interface (so it will use just 2 cables, SDA & SCL, + 2 for VCC & GND).

  I found some tutorials online, but they were for Arduino or python... NOTHING FOR C!!
  So i decided to write a damn C lib for this component.
  I had to cross check various codes/datasheets to understand how it works, but at the end i wrote it.
  So, this is my lib! Enjoy it ;)

  You can grab from here


  #include <stdio.h>
  #include <string.h>
  #include "i2c.h"
  #include "lcd.h"

  #define I2C_FILE_NAME "/dev/i2c-0"

  const char* txt[]  = {
      "I work on the PI",
      "via liblcm1602.a"
  };

  int main() {
      int i2c_dev;
      lcd lcd0;
      // 0x27 is the address of the i2c device
      i2c_dev = open_i2c (I2C_FILE_NAME, 0x27);
      if (i2c_dev < 0) {
         printf ("Error: %d\n", i2c_dev);
         return 1;
      }
      lcd_init (&lcd0, i2c_dev);
      lcd_clear (&lcd0);
      lcd_print (&lcd0, txt[0], strlen(txt[0]), 0);
      lcd_print (&lcd0, txt[1], strlen (txt[1]), 1);
      close_i2c (i2c_dev);
      return 0;
  }


}