File content as of revision 0:28f3c9274ea7:

/*
Modified by COX
version 0.1

Editor     : COX
Date       : 06.03.2013

*
* Update DFRobot source to work on FRDM KL25Z
*
*/

#include "LCD4884.h"
#include "font_6x8.h"
#include "font_big.h"

DigitalOut SpiClk(SPI_SCK);    //2- Serial Clock(Master Output)
DigitalOut SpiMosi(SPI_MOSI);  //3- Master Output,Slave Input
DigitalOut LcdDC(LCD_DC);      //4- Data/Command(command active low)
DigitalOut SpiCS(SPI_CS);      //5- Chip Select,Slave Transmit Enable(active low,Master Output)
DigitalOut LcdRst(LCD_RST);    //6- One Reset button
PwmOut     LcdBl(LCD_BL);      //7- LCD backlight

LCD4884::LCD4884()
{};

/******************************************************************/
void LCD4884::backlight(float dat)
{
    LcdBl = dat;
}

/******************************************************************/
void LCD4884::LCD_init(void)
{
    /* pin intializer */
    SpiClk = LOW;
    SpiMosi = LOW;
    SpiCS = LOW;
    LcdDC = LOW;
    LcdBl = LOW;

    LcdRst = LOW;
    wait(ONE_US);
    LcdRst = HIGH;
    
    SpiCS = LOW;  //Chip Select, Slave Transmit Enable(active low, Master Output)
    wait(ONE_US);
    SpiCS = HIGH;
    wait(ONE_US);
    LcdBl = LCD_INITIAL_BRIGHTNESS;
    
    //data_type=0, all are command bytes
    LCD_write_byte(0x21, 0); //Function Set:0 0 1 0 0 PD V H=0010 0001;PD=0,V=0,H=1;
    LCD_write_byte(0xc0, 0); //Set Vop:1 Vop6 Vop5 Vop4 Vop3 Vop2 Vop1 Vop0=1100 0000
    LCD_write_byte(0x06, 0); //Set Temperature Coefficient:0 0 0 0 0 1 Tc1 Tc0=0000 0110;Tc1=1,Tc0=0(Vlcd temperature coefficient 2)
    LCD_write_byte(0x13, 0); //Set Bias System (BSx):0 0 0 1 0 BS2 BS1 BS0=0001 0011;BS2=0, BS1=1, BS0=1==>N=4,MUX RATE=1:48

    LCD_write_byte(0x20, 0);//Function Set:0 0 1 0 0 PD V H=0010 0000;PD=0,V=0,H=0;
    LCD_clear();
    LCD_write_byte(0x0c, 0);//Display Control: 0 0 0 0 1 D 0 E=0000 1100 ;D=1,E=0:normal mode

    SpiCS = LOW;
}

/******************************************************************/
void LCD4884::LCD_write_byte(unsigned char dat, unsigned char dat_type)
{
    unsigned int i;
    SpiCS = LOW; //Chip Enable:Active LOW

    if (dat_type == 0)
        LcdDC = LOW; // D/C=0:the current data byte is interpreted as command byte
    else
        LcdDC = HIGH; // D/C=1:write data to display RAM

    for(i=0;i<8;i++)
    {
        if(dat&0x80) //1000 0000
        {
            SpiMosi = HIGH;
        }
        else
        {
            SpiMosi = LOW;
        }
        SpiClk = LOW;
        dat = dat << 1;
        SpiClk = HIGH;
    }
    SpiCS = HIGH;
}

/******************************************************************/
void LCD4884::LCD_draw_bmp_pixel(unsigned char X,unsigned char Y,unsigned char *map,
                  unsigned char Pix_x,unsigned char Pix_y)
{
    unsigned int i,n;
    unsigned char row;

    if (Pix_y%8==0)
        row=Pix_y/8; //row from 1 to 6;Pix_y from R0 to R47
    else
        row=Pix_y/8+1; //Quotient+1
    
    for (n=0;n<row;n++)
    {
        LCD_set_XY(X,Y);
        for(i=0; i<Pix_x; i++)
        {
            LCD_write_byte(map[i+n*Pix_x], 1); // D/C=1:write data to display RAM
        }
        Y++;
    }
}

/**************************************************************************************/
void LCD4884::LCD_write_string(unsigned char X,unsigned char Y,char *s, char mode)
{
    LCD_set_XY(X,Y);
    while (*s)
    {
        LCD_write_char(*s, mode);
        s++;
    }
}

/**************************************************************************************/
void LCD4884::LCD_prop_write_string(unsigned char X,unsigned char Y,char *s, char mode)
{
    LCD_set_XY(X,Y);
    while (*s)
    {
        LCD_prop_write_char(*s, mode);
        s++;
    }
}

/*************************************************************************************/
void LCD4884::LCD_write_chinese(unsigned char X, unsigned char Y,unsigned char *c,unsigned char ch_with,unsigned char num,unsigned char line,unsigned char row)
{
    unsigned char i,n;
    LCD_set_XY(X,Y);                             
    for (i=0;i<num;)
    {
        for (n=0; n<ch_with*2; n++)
        {
            if (n==ch_with)
            {
                if (i==0)
                    LCD_set_XY(X,Y+1);
                else
                  LCD_set_XY((X+(ch_with+row)*i),Y+1);
            }
            LCD_write_byte(c[(i*ch_with*2)+n],1);
        }
        i++; 
        LCD_set_XY((X+(ch_with+row)*i),Y); 
    }
}


/******************************************************************/
void LCD4884::LCD_write_string_big ( unsigned char X,unsigned char Y, char *string, char mode )
{
    while ( *string )
    {
        LCD_write_char_big( X, Y, *string , mode );
        
        if(*string++ == '.')
            X += 5;
        else
            X += 12;
    }
}

/******************************************************************/
/* write char in big font */
void LCD4884::LCD_write_char_big (unsigned char X,unsigned char Y, unsigned char ch, char mode)
{
   unsigned char i, j;
   unsigned char *pFont;
   unsigned char ch_dat;
   
   pFont = (unsigned char *) big_number;
   
   if(ch == '.')
        ch = 10;
   else if (ch == '+')
        ch = 11;
   else if (ch == '-')
        ch = 12;
   else
        ch = ch & 0x0f;

   for(i=0;i<3;i++)
   {
        LCD_set_XY ( X, Y+i);

        for(j=0; j<16; j++)
        {
            ch_dat = *(pFont+ch*48 + i*16 +j);
            LCD_write_byte( (mode == MENU_NORMAL)? ch_dat : (ch_dat^0xff), 1);
        }
   }
}
  
/******************************************************************/
void LCD4884::LCD_write_char(unsigned char c, char mode)
{
    unsigned char line;
    unsigned char *pFont;
    unsigned char ch; 
    
    pFont = (unsigned char *)font6_8; //pointer *pFont points at font6_8[][6]
    c -= 32; // the ASCII of "SP" is 32

    for (line=0; line<6; line++)
    {
        ch = *(pFont+c*6+line); //read c from the font6_8[][6] (the detail information is in the "font6x8.h")
        LCD_write_byte( (mode==MENU_NORMAL)? ch: (ch^ 0xff) , 1); //MENU_NORMAL=0,True:return ch;False:return ch
    }
}

/*******************************************************************/
unsigned char LCD4884::LCD_prop_write_char(unsigned char c, char mode)
{
    int line, line_s=0, line_e=2;
    unsigned char *pFont;
    unsigned char ch;

    pFont = (unsigned char *)font6_8;
    if (c -= 32)
    {
        for (line_s=0; line_s<6; line_s++)
        {
            if(*(pFont+c*6+line_s))
                break;
        }
        for (line_e=5; line_e<0; line_e--)
        {
            if(*(pFont+c*6+line_e))
                break;
        }
    }
    for (line=line_s; line<line_e+1; line++)
    {
        ch = *(pFont+c*6+line);
        LCD_write_byte( (mode==MENU_NORMAL)? ch: (ch^ 0xff) , 1);
    }
    LCD_write_byte( (mode==MENU_NORMAL)? 0:0xff, 1);
    return ((unsigned char)(line_e+2 - line_s));
}

/******************************************************************/
void LCD4884::LCD_set_XY(unsigned char X, unsigned char Y)
{
    LCD_write_byte(0x40 | Y, 0);        // column
    LCD_write_byte(0x80 | X, 0);        // row
}

/******************************************************************/
void LCD4884::LCD_clear(void)
{
    unsigned int i;

    LCD_write_byte(0x0c, 0);
    LCD_write_byte(0x80, 0);

    for (i=0; i<504; i++)  //6*84
    {
        LCD_write_byte(0, 1);
    }
}