/*  I2C LCD Operation [½ÄÛÍÞØ°¥Øů¸½]
    PIC12F629       4MHz
    Last M          11/27
    Start           2010/11/24      by M.Kikuchi
    Config=0x31C4
*/

sbit Soft_I2C_Scl            at GP4_bit;
sbit Soft_I2C_Sda            at GP5_bit;
sbit Soft_I2C_Scl_Direction  at TRISIO4_bit;
sbit Soft_I2C_Sda_Direction  at TRISIO5_bit;

char Contrast= 0b101100;  //3.2V+-
//    Contrast = 0b111000;  //2.6V+-   = 0b100000;  //3.8V+-

extern      void      Lcd_Comd();
extern      void      Lcd_Data();
extern      void      Lcd_I2c_Set();
extern      void      Lcd_Pos(const char *S);
extern      void      Lcd_Icon_Dsp(char I_add,char I_bit);

void Lcd_Comd(char X1)
{
     Soft_I2C_Start();
     Soft_I2C_Write(0x7c);        //I2C address
     Soft_I2C_Write(0x0);         //
     Soft_I2C_Write(X1);          //
     Soft_I2C_Stop();
     Delay_us(30);
}

void Lcd_Data(char X1)
{
     Soft_I2C_Start();
     Soft_I2C_Write(0x7c);        //I2C address
     Soft_I2C_Write(0x40);        //
     Soft_I2C_Write(X1);          //
     Soft_I2C_Stop();
     Delay_us(30);
}

void Lcd_I2c_Set()
{
     Delay_ms(40);
     Lcd_Comd(0x38);           //Function
     Lcd_Comd(0x39);           //Function
     Lcd_Comd(0x14);           //internal OSC
     Lcd_Comd(0x40);           //set Icon address
     Lcd_Comd(0x10);           //Icon bit
     Lcd_Comd(0x70 | (Contrast & 0x0F));    //Contrast set
     Lcd_Comd(0x5C | ((Contrast >>4)& 3));
     Lcd_Comd(0x6C);           //FolloworControl
     Delay_ms(300);
     //
     Lcd_Comd(0x38);           //Function again
     Lcd_Comd(0x08);
     Lcd_Comd(0x0C);           //Display on
     Lcd_Comd(0x06);           //Entry mode increment
     Lcd_Comd(0x01);           //Clear Display
     Delay_ms(2);
}

void Lcd_Pos(const char *S)
{
     while (*S) Lcd_Data(*S++);
}

void Lcd_Icon_Dsp(char I_add,char I_bit)
{             // I_add=Icon Address   I_bit=Icon bit
     Lcd_Comd(0x39);           //Function Specal
     Lcd_Comd(0x40 | I_add);   //set of Icon Address
     Lcd_Data(I_bit);          //set of Icon bit
     Lcd_Comd(0x38);
}

void main() {
     char   i;
     TRISIO=0b00001001;
     GPIO=0;
     Soft_I2C_Init();          // set of I2C
     Lcd_I2c_Set();            // set of begin LCD
     Lcd_Icon_Dsp(0x0d,0x1e);  // “d’r Box
     Lcd_Icon_Dsp(0,0x10);     // Antenna
// Display
     Lcd_Comd(0x80);           //set Line 1
     for (i=0x30 ; i<0x3A ; i++)   // Data 0-9
          Lcd_Data(i);
     Lcd_Comd(0xC8);           //set line 2
     Lcd_Pos("BY M.·¸Á");
     while(1) ;                //end
}