/*****************************************************************************
 *  Module for Microchip Graphics Library
 *  Solomon Systech SSD1339 OLED display controller driver
  *****************************************************************************
 * FileName:        SSD1339.c
 * Dependencies:    Graphics.h
 * Processor:       PIC24
 * Compiler:       	MPLAB C30
 * Linker:          MPLAB LINK30
 * Company:         Microchip Technology Incorporated
 *
 * Software License Agreement
 *
 * Copyright © 2008 Microchip Technology Inc.  All rights reserved.
 * Microchip licenses to you the right to use, modify, copy and distribute
 * Software only when embedded on a Microchip microcontroller or digital
 * signal controller, which is integrated into your product or third party
 * product (pursuant to the sublicense terms in the accompanying license
 * agreement).  
 *
 * You should refer to the license agreement accompanying this Software
 * for additional information regarding your rights and obligations.
 *
 * SOFTWARE AND DOCUMENTATION ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY
 * KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION, ANY WARRANTY
 * OF MERCHANTABILITY, TITLE, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR
 * PURPOSE. IN NO EVENT SHALL MICROCHIP OR ITS LICENSORS BE LIABLE OR
 * OBLIGATED UNDER CONTRACT, NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION,
 * BREACH OF WARRANTY, OR OTHER LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT
 * DAMAGES OR EXPENSES INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL,
 * INDIRECT, PUNITIVE OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
 * COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY
 * CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
 * OR OTHER SIMILAR COSTS.
 *
 * Author               Date        Comment
 *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 * Anton Alkhimenok     11/12/07	Version 1.0 release
 *****************************************************************************/
#include "Graphics\Graphics.h"

// Color
WORD_VAL    _color;

// Clipping region control
SHORT       _clipRgn;

// Clipping region borders
SHORT       _clipLeft;
SHORT       _clipTop;
SHORT       _clipRight;
SHORT       _clipBottom;

/////////////////////// LOCAL FUNCTIONS PROTOTYPES ////////////////////////////
void        PutImage1BPP(SHORT left, SHORT top, FLASH_BYTE *bitmap, BYTE stretch);
void        PutImage4BPP(SHORT left, SHORT top, FLASH_BYTE *bitmap, BYTE stretch);
void        PutImage8BPP(SHORT left, SHORT top, FLASH_BYTE *bitmap, BYTE stretch);
void        PutImage16BPP(SHORT left, SHORT top, FLASH_BYTE *bitmap, BYTE stretch);

void        PutImage1BPPExt(SHORT left, SHORT top, void *bitmap, BYTE stretch);
void        PutImage4BPPExt(SHORT left, SHORT top, void *bitmap, BYTE stretch);
void        PutImage8BPPExt(SHORT left, SHORT top, void *bitmap, BYTE stretch);
void        PutImage16BPPExt(SHORT left, SHORT top, void *bitmap, BYTE stretch);

/*********************************************************************
* Function:  void  DelayMs(WORD time)
*
* PreCondition: none
*
* Input: time - delay in ms
*
* Output: none
*
* Side Effects: none
*
* Overview: delays execution on time specified in ms
*
* Note: delay is defined for 16MIPS
*
********************************************************************/
#define DELAY_1MS   16000 / 9

/* */
void DelayMs(WORD time)
{
    unsigned    delay;
    while(time--)
        for(delay = 0; delay < DELAY_1MS; delay++);
}

/*********************************************************************
* Function:  void ResetDevice()
*
* PreCondition: none
*
* Input: none
*
* Output: none
*
* Side Effects: none
*
* Overview: resets LCD, initializes PMP
*
* Note: none
*
********************************************************************/
void ResetDevice(void)
{

    // Set LCD CS pin as output
    CS_TRIS_BIT = 0;

    // Disable LCD
    CS_LAT_BIT = 1;

    // Set FLASH CS pin as output
    CS_FLASH_TRIS_BIT = 0;

    // Disable FLASH
    CS_FLASH_LAT_BIT = 1;

    // Set reset pin as output
    RST_TRIS_BIT = 0;

    // Hold in reset
    RST_LAT_BIT = 0;

    // PMP setup
    PMMODEbits.MODE = 0b10;    // Master 2
    PMMODEbits.WAITB = 0b00;
    PMMODEbits.WAITM = 0b0001;
    PMMODEbits.WAITE = 0b00;
    PMAENbits.PTEN0 = 1;        // Address line 0 is enabled
    PMCONbits.CSF = 0b00;
    PMCONbits.PTRDEN = 1;
    PMCONbits.PTWREN = 1;
    PMCONbits.PMPEN = 1;

    // Reset controller
    RST_LAT_BIT = 1;
    DelayMs(20);
    RST_LAT_BIT = 0;
    DelayMs(20);
    RST_LAT_BIT = 1;
    DelayMs(20);

    // Enable LCD
    CS_LAT_BIT = 0;

    // Setup display
    WriteCommand(CMD_DISPON);

    WriteCommand(CMD_MODE);
    WriteData(0x74);

    WriteCommand(CMD_SRTLINE);
    WriteData(128);

    // Disable LCD
    CS_LAT_BIT = 1;

    DelayMs(20);
}

/*********************************************************************
* Function: void PutPixel(SHORT x, SHORT y)
*
* PreCondition: none
*
* Input: x,y - pixel coordinates
*
* Output: none
*
* Side Effects: none
*
* Overview: puts pixel
*
* Note: none
*
********************************************************************/
void PutPixel(SHORT x, SHORT y)
{
    if(_clipRgn)
    {
        if(x < _clipLeft)
            return;
        if(x > _clipRight)
            return;
        if(y < _clipTop)
            return;
        if(y > _clipBottom)
            return;
    }

    CS_LAT_BIT = 0;
    SetPointer(x, y, GetMaxX(), GetMaxY());
    WriteCommand(CMD_WRITE);
    WriteData(_color.v[1]);
    WriteData(_color.v[0]);
    CS_LAT_BIT = 1;
}

/*********************************************************************
* Function: WORD GetPixel(SHORT x, SHORT y)
*
* PreCondition: none
*
* Input: x,y - pixel coordinates 
*
* Output: pixel color
*
* Side Effects: none
*
* Overview: return pixel color at x,y position
*
* Note: none
*
********************************************************************/
WORD GetPixel(SHORT x, SHORT y)
{
    WORD_VAL    result;

    CS_LAT_BIT = 0;

    SetPointer(x, y, GetMaxX(), GetMaxY());

    WriteCommand(CMD_READ);

    // Start read cycle for LSB
    result.v[0] = PMDIN1;

    // Wait for reading is done
    Nop();
    Nop();

    // Get LSB and start read cycle for MSB
    result.v[0] = PMDIN1;

    // Wait for reading is done
    Nop();
    Nop();

    // Disable LCD (it will not accept extra /RD pulse)
    CS_LAT_BIT = 1;

    // Read MSB
    result.v[1] = PMDIN1;

    // Wait for dummy reading is done
    Nop();
    Nop();

    return (result.Val);
}

/*********************************************************************
* Function: WORD Bar(SHORT left, SHORT top, SHORT right, SHORT bottom)
*
* PreCondition: none
*
* Input: left,top - top left corner coordinates,
*        right,bottom - bottom right corner coordinates
*
* Output: For NON-Blocking configuration:
*         - Returns 0 when device is busy and the shape is not yet completely drawn.
*         - Returns 1 when the shape is completely drawn.
*         For Blocking configuration:
*         - Always return 1.
*
* Side Effects: none
*
* Overview: draws rectangle filled with current color
*
* Note: none
*
********************************************************************/
WORD Bar(SHORT left, SHORT top, SHORT right, SHORT bottom)
{
    SHORT   x, y;

    #ifndef USE_NONBLOCKING_CONFIG
    while(IsDeviceBusy() != 0);

    /* Ready */
    #else
    if(IsDeviceBusy() != 0)
        return (0);
    #endif
    if(_clipRgn)
    {
        if(left < _clipLeft)
            left = _clipLeft;
        if(right > _clipRight)
            right = _clipRight;
        if(top < _clipTop)
            top = _clipTop;
        if(bottom > _clipBottom)
            bottom = _clipBottom;
    }

    CS_LAT_BIT = 0;

    SetPointer(left, top, right, bottom);
    WriteCommand(CMD_WRITE);
    for(y = top; y < bottom + 1; y++)
    {
        for(x = left; x < right + 1; x++)
        {
            WriteData(_color.v[1]);
            WriteData(_color.v[0]);
        }
    }

    CS_LAT_BIT = 1;
    return (1);
}

/*********************************************************************
* Function: void ClearDevice(void)
*
* PreCondition: none
*
* Input: none
*
* Output: none
*
* Side Effects: none
*
* Overview: clears screen with current color 
*
* Note: none
*
********************************************************************/
void ClearDevice(void)
{
    DWORD   counter;

    CS_LAT_BIT = 0;
    SetPointer(0, 0, GetMaxX(), GetMaxY());
    WriteCommand(CMD_WRITE);
    for(counter = 0; counter < (DWORD) (GetMaxX() + 1) * (GetMaxY() + 1); counter++)
    {
        WriteData(_color.v[1]);
        WriteData(_color.v[0]);
    }

    CS_LAT_BIT = 1;
}

/*********************************************************************
* Function: WORD PutImage(SHORT left, SHORT top, void* bitmap, BYTE stretch)
*
* PreCondition: none
*
* Input: left,top - left top image corner, bitmap - image pointer,
*        stretch - image stretch factor
*
* Output: For NON-Blocking configuration:
*         - Returns 0 when device is busy and the image is not yet completely drawn.
*         - Returns 1 when the image is completely drawn.
*         For Blocking configuration:
*         - Always return 1.
*
* Side Effects: none
*
* Overview: outputs image starting from left,top coordinates
*
* Note: image must be located in flash
*
********************************************************************/
WORD PutImage(SHORT left, SHORT top, void *bitmap, BYTE stretch)
{
    FLASH_BYTE  *flashAddress;
    BYTE        colorDepth;
    WORD        colorTemp;

    #ifndef USE_NONBLOCKING_CONFIG
    while(IsDeviceBusy() != 0);

    /* Ready */
    #else
    if(IsDeviceBusy() != 0)
        return (0);
    #endif

    // Save current color
    colorTemp = _color.Val;

    switch(*((SHORT *)bitmap))
    {
            #ifdef USE_BITMAP_FLASH

        case FLASH:

            // Image address
            flashAddress = ((BITMAP_FLASH *)bitmap)->address;

            // Read color depth
            colorDepth = *(flashAddress + 1);

            // Draw picture
            switch(colorDepth)
            {
                case 1:     PutImage1BPP(left, top, flashAddress, stretch); break;
                case 4:     PutImage4BPP(left, top, flashAddress, stretch); break;
                case 8:     PutImage8BPP(left, top, flashAddress, stretch); break;
                case 16:    PutImage16BPP(left, top, flashAddress, stretch); break;
            }

            break;
            #endif
            #ifdef USE_BITMAP_EXTERNAL

        case EXTERNAL:

            // Get color depth
            ExternalMemoryCallback(bitmap, 1, 1, &colorDepth);

            // Draw picture
            switch(colorDepth)
            {
                case 1:     PutImage1BPPExt(left, top, bitmap, stretch); break;
                case 4:     PutImage4BPPExt(left, top, bitmap, stretch); break;
                case 8:     PutImage8BPPExt(left, top, bitmap, stretch); break;
                case 16:    PutImage16BPPExt(left, top, bitmap, stretch); break;
                default:    break;
            }

            break;
            #endif

        default:
            break;
    }

    // Restore current color
    _color.Val = colorTemp;
    return (1);
}

#ifdef USE_BITMAP_FLASH

/*********************************************************************
* Function: void PutImage1BPP(SHORT left, SHORT top, FLASH_BYTE* bitmap, BYTE stretch)
*
* PreCondition: none
*
* Input: left,top - left top image corner, bitmap - image pointer,
*        stretch - image stretch factor
*
* Output: none
*
* Side Effects: none
*
* Overview: outputs monochrome image starting from left,top coordinates
*
* Note: image must be located in flash
*
********************************************************************/
void PutImage1BPP(SHORT left, SHORT top, FLASH_BYTE *bitmap, BYTE stretch)
{
    register FLASH_BYTE *flashAddress;
    register FLASH_BYTE *tempFlashAddress;
    BYTE                temp;
    WORD                sizeX, sizeY;
    WORD                x, y;
    BYTE                stretchX, stretchY;
    WORD                pallete[2];
    BYTE                mask;

    // Move pointer to size information
    flashAddress = bitmap + 2;

    // Read image size
    sizeY = *((FLASH_WORD *)flashAddress);
    flashAddress += 2;
    sizeX = *((FLASH_WORD *)flashAddress);
    flashAddress += 2;
    pallete[0] = *((FLASH_WORD *)flashAddress);
    flashAddress += 2;
    pallete[1] = *((FLASH_WORD *)flashAddress);
    flashAddress += 2;

    CS_LAT_BIT = 0;
    for(y = 0; y < sizeY; y++)
    {
        tempFlashAddress = flashAddress;
        for(stretchY = 0; stretchY < stretch; stretchY++)
        {
            flashAddress = tempFlashAddress;
            SetPointer(left, top + y, GetMaxX(), GetMaxY());
            WriteCommand(CMD_WRITE);
            mask = 0;
            for(x = 0; x < sizeX; x++)
            {

                // Read 8 pixels from flash
                if(mask == 0)
                {
                    temp = *flashAddress;
                    flashAddress++;
                    mask = 0x80;
                }

                // Set color
                if(mask & temp)
                {
                    SetColor(pallete[1]);
                }
                else
                {
                    SetColor(pallete[0]);
                }

                // Write pixel to screen
                for(stretchX = 0; stretchX < stretch; stretchX++)
                {
                    WriteData(_color.v[1]);
                    WriteData(_color.v[0]);
                }

                // Shift to the next pixel
                mask >>= 1;
            }
        }
    }

    CS_LAT_BIT = 1;
}

/*********************************************************************
* Function: void PutImage4BPP(SHORT left, SHORT top, FLASH_BYTE* bitmap, BYTE stretch)
*
* PreCondition: none
*
* Input: left,top - left top image corner, bitmap - image pointer,
*        stretch - image stretch factor
*
* Output: none
*
* Side Effects: none
*
* Overview: outputs 16 color image starting from left,top coordinates
*
* Note: image must be located in flash
*
********************************************************************/
void PutImage4BPP(SHORT left, SHORT top, FLASH_BYTE *bitmap, BYTE stretch)
{
    register FLASH_BYTE *flashAddress;
    register FLASH_BYTE *tempFlashAddress;
    WORD                sizeX, sizeY;
    register WORD       x, y;
    BYTE                temp;
    register BYTE       stretchX, stretchY;
    WORD                pallete[16];
    WORD                counter;

    // Move pointer to size information
    flashAddress = bitmap + 2;

    // Read image size
    sizeY = *((FLASH_WORD *)flashAddress);
    flashAddress += 2;
    sizeX = *((FLASH_WORD *)flashAddress);
    flashAddress += 2;

    // Read pallete
    for(counter = 0; counter < 16; counter++)
    {
        pallete[counter] = *((FLASH_WORD *)flashAddress);
        flashAddress += 2;
    }

    CS_LAT_BIT = 0;
    for(y = 0; y < sizeY; y++)
    {
        tempFlashAddress = flashAddress;
        for(stretchY = 0; stretchY < stretch; stretchY++)
        {
            flashAddress = tempFlashAddress;
            SetPointer(left, top + y, GetMaxX(), GetMaxY());
            WriteCommand(CMD_WRITE);
            for(x = 0; x < sizeX; x++)
            {

                // Read 2 pixels from flash
                if((x & 0x0001) == 0)
                {

                    // Set color
                    SetColor(pallete[temp >> 4]);
                }
                else
                {
                    temp = *flashAddress;
                    flashAddress++;

                    // Set color
                    SetColor(pallete[temp & 0x0f]);
                }

                // Write pixel to screen
                for(stretchX = 0; stretchX < stretch; stretchX++)
                {
                    WriteData(_color.v[1]);
                    WriteData(_color.v[0]);
                }

                // Shift to the next pixel
                temp >>= 4;
            }
        }
    }

    CS_LAT_BIT = 1;
}

/*********************************************************************
* Function: void PutImage8BPP(SHORT left, SHORT top, FLASH_BYTE* bitmap, BYTE stretch)
*
* PreCondition: none
*
* Input: left,top - left top image corner, bitmap - image pointer,
*        stretch - image stretch factor
*
* Output: none
*
* Side Effects: none
*
* Overview: outputs 256 color image starting from left,top coordinates
*
* Note: image must be located in flash
*
********************************************************************/
void PutImage8BPP(SHORT left, SHORT top, FLASH_BYTE *bitmap, BYTE stretch)
{
    register FLASH_BYTE *flashAddress;
    register FLASH_BYTE *tempFlashAddress;
    WORD                sizeX, sizeY;
    WORD                x, y;
    BYTE                temp;
    BYTE                stretchX, stretchY;
    WORD                pallete[256];
    WORD                counter;

    // Move pointer to size information
    flashAddress = bitmap + 2;

    // Read image size
    sizeY = *((FLASH_WORD *)flashAddress);
    flashAddress += 2;
    sizeX = *((FLASH_WORD *)flashAddress);
    flashAddress += 2;

    // Read pallete
    for(counter = 0; counter < 256; counter++)
    {
        pallete[counter] = *((FLASH_WORD *)flashAddress);
        flashAddress += 2;
    }

    CS_LAT_BIT = 0;
    for(y = 0; y < sizeY; y++)
    {
        tempFlashAddress = flashAddress;
        for(stretchY = 0; stretchY < stretch; stretchY++)
        {
            flashAddress = tempFlashAddress;
            SetPointer(left, top + y, GetMaxX(), GetMaxY());
            WriteCommand(CMD_WRITE);
            for(x = 0; x < sizeX; x++)
            {

                // Read pixels from flash
                temp = *flashAddress;
                flashAddress++;

                // Set color
                SetColor(pallete[temp]);

                // Write pixel to screen
                for(stretchX = 0; stretchX < stretch; stretchX++)
                {
                    WriteData(_color.v[1]);
                    WriteData(_color.v[0]);
                }
            }
        }
    }

    CS_LAT_BIT = 1;
}

/*********************************************************************
* Function: void PutImage16BPP(SHORT left, SHORT top, FLASH_BYTE* bitmap, BYTE stretch)
*
* PreCondition: none
*
* Input: left,top - left top image corner, bitmap - image pointer,
*        stretch - image stretch factor
*
* Output: none
*
* Side Effects: none
*
* Overview: outputs hicolor image starting from left,top coordinates
*
* Note: image must be located in flash
*
********************************************************************/
void PutImage16BPP(SHORT left, SHORT top, FLASH_BYTE *bitmap, BYTE stretch)
{
    register FLASH_WORD *flashAddress;
    register FLASH_WORD *tempFlashAddress;
    WORD                sizeX, sizeY;
    register WORD       x, y;
    WORD                temp;
    register BYTE       stretchX, stretchY;

    // Move pointer to size information
    flashAddress = (FLASH_WORD *)bitmap + 1;

    // Read image size
    sizeY = *flashAddress;
    flashAddress++;
    sizeX = *flashAddress;
    flashAddress++;

    CS_LAT_BIT = 0;
    for(y = 0; y < sizeY; y++)
    {
        tempFlashAddress = flashAddress;
        for(stretchY = 0; stretchY < stretch; stretchY++)
        {
            flashAddress = tempFlashAddress;
            SetPointer(left, top + y, GetMaxX(), GetMaxY());
            WriteCommand(CMD_WRITE);
            for(x = 0; x < sizeX; x++)
            {

                // Read pixels from flash
                temp = *flashAddress;
                flashAddress++;

                // Set color
                SetColor(temp);

                // Write pixel to screen
                for(stretchX = 0; stretchX < stretch; stretchX++)
                {
                    WriteData(_color.v[1]);
                    WriteData(_color.v[0]);
                }
            }
        }
    }

    CS_LAT_BIT = 1;
}

#endif
#ifdef USE_BITMAP_EXTERNAL

/*********************************************************************
* Function: void PutImage1BPPExt(SHORT left, SHORT top, void* bitmap, BYTE stretch)
*
* PreCondition: none
*
* Input: left,top - left top image corner, bitmap - image pointer,
*        stretch - image stretch factor
*
* Output: none
*
* Side Effects: none
*
* Overview: outputs monochrome image starting from left,top coordinates
*
* Note: image must be located in flash
*
********************************************************************/
void PutImage1BPPExt(SHORT left, SHORT top, void *bitmap, BYTE stretch)
{
    register DWORD  memOffset;
    BITMAP_HEADER   bmp;
    WORD            pallete[2];
    BYTE            lineBuffer[((GetMaxX() + 1) / 8) + 1];
    BYTE            *pData;
    SHORT           byteWidth;

    BYTE            temp;
    BYTE            mask;
    WORD            sizeX, sizeY;
    WORD            x, y;
    BYTE            stretchX, stretchY;

    // Get bitmap header
    ExternalMemoryCallback(bitmap, 0, sizeof(BITMAP_HEADER), &bmp);

    // Get pallete (2 entries)
    ExternalMemoryCallback(bitmap, sizeof(BITMAP_HEADER), 2 * sizeof(WORD), pallete);

    // Set offset to the image data
    memOffset = sizeof(BITMAP_HEADER) + 2 * sizeof(WORD);

    // Line width in bytes
    byteWidth = bmp.width >> 3;
    if(bmp.width & 0x0007)
        byteWidth++;

    // Get size
    sizeX = bmp.width;
    sizeY = bmp.height;

    for(y = 0; y < sizeY; y++)
    {

        // Get line
        ExternalMemoryCallback(bitmap, memOffset, byteWidth, lineBuffer);
        memOffset += byteWidth;
        CS_LAT_BIT = 0;
        for(stretchY = 0; stretchY < stretch; stretchY++)
        {
            pData = lineBuffer;
            SetPointer(left, top + y, GetMaxX(), GetMaxY());
            WriteCommand(CMD_WRITE);
            mask = 0;
            for(x = 0; x < sizeX; x++)
            {

                // Read 8 pixels from flash
                if(mask == 0)
                {
                    temp = *pData++;
                    mask = 0x80;
                }

                // Set color
                if(mask & temp)
                {
                    SetColor(pallete[1]);
                }
                else
                {
                    SetColor(pallete[0]);
                }

                // Write pixel to screen
                for(stretchX = 0; stretchX < stretch; stretchX++)
                {
                    WriteData(_color.v[1]);
                    WriteData(_color.v[0]);
                }

                // Shift to the next pixel
                mask >>= 1;
            }
        }

        CS_LAT_BIT = 1;
    }
}

/*********************************************************************
* Function: void PutImage4BPPExt(SHORT left, SHORT top, void* bitmap, BYTE stretch)
*
* PreCondition: none
*
* Input: left,top - left top image corner, bitmap - image pointer,
*        stretch - image stretch factor
*
* Output: none
*
* Side Effects: none
*
* Overview: outputs monochrome image starting from left,top coordinates
*
* Note: image must be located in flash
*
********************************************************************/
void PutImage4BPPExt(SHORT left, SHORT top, void *bitmap, BYTE stretch)
{
    register DWORD  memOffset;
    BITMAP_HEADER   bmp;
    WORD            pallete[16];
    BYTE            lineBuffer[((GetMaxX() + 1) / 2) + 1];
    BYTE            *pData;
    SHORT           byteWidth;

    BYTE            temp;
    WORD            sizeX, sizeY;
    WORD            x, y;
    BYTE            stretchX, stretchY;

    // Get bitmap header
    ExternalMemoryCallback(bitmap, 0, sizeof(BITMAP_HEADER), &bmp);

    // Get pallete (16 entries)
    ExternalMemoryCallback(bitmap, sizeof(BITMAP_HEADER), 16 * sizeof(WORD), pallete);

    // Set offset to the image data
    memOffset = sizeof(BITMAP_HEADER) + 16 * sizeof(WORD);

    // Line width in bytes
    byteWidth = bmp.width >> 1;
    if(bmp.width & 0x0001)
        byteWidth++;

    // Get size
    sizeX = bmp.width;
    sizeY = bmp.height;

    for(y = 0; y < sizeY; y++)
    {

        // Get line
        ExternalMemoryCallback(bitmap, memOffset, byteWidth, lineBuffer);
        memOffset += byteWidth;
        CS_LAT_BIT = 0;
        for(stretchY = 0; stretchY < stretch; stretchY++)
        {
            pData = lineBuffer;
            SetPointer(left, top + y, GetMaxX(), GetMaxY());
            WriteCommand(CMD_WRITE);
            for(x = 0; x < sizeX; x++)
            {

                // Read 2 pixels from flash
                if(x & 0x0001)
                {

                    // second pixel in byte
                    SetColor(pallete[temp >> 4]);
                }
                else
                {
                    temp = *pData++;

                    // first pixel in byte
                    SetColor(pallete[temp & 0x0f]);
                }

                // Set color
                SetColor(pallete[temp & 0x0f]);

                // Write pixel to screen
                for(stretchX = 0; stretchX < stretch; stretchX++)
                {
                    WriteData(_color.v[1]);
                    WriteData(_color.v[0]);
                }

                // Shift to the next pixel
                temp >>= 4;
            }
        }

        CS_LAT_BIT = 1;
    }
}

/*********************************************************************
* Function: void PutImage8BPPExt(SHORT left, SHORT top, void* bitmap, BYTE stretch)
*
* PreCondition: none
*
* Input: left,top - left top image corner, bitmap - image pointer,
*        stretch - image stretch factor
*
* Output: none
*
* Side Effects: none
*
* Overview: outputs monochrome image starting from left,top coordinates
*
* Note: image must be located in flash
*
********************************************************************/
void PutImage8BPPExt(SHORT left, SHORT top, void *bitmap, BYTE stretch)
{
    register DWORD  memOffset;
    BITMAP_HEADER   bmp;
    WORD            pallete[256];
    BYTE            lineBuffer[(GetMaxX() + 1)];
    BYTE            *pData;

    BYTE            temp;
    WORD            sizeX, sizeY;
    WORD            x, y;
    BYTE            stretchX, stretchY;

    // Get bitmap header
    ExternalMemoryCallback(bitmap, 0, sizeof(BITMAP_HEADER), &bmp);

    // Get pallete (256 entries)
    ExternalMemoryCallback(bitmap, sizeof(BITMAP_HEADER), 256 * sizeof(WORD), pallete);

    // Set offset to the image data
    memOffset = sizeof(BITMAP_HEADER) + 256 * sizeof(WORD);

    // Get size
    sizeX = bmp.width;
    sizeY = bmp.height;

    for(y = 0; y < sizeY; y++)
    {

        // Get line
        ExternalMemoryCallback(bitmap, memOffset, sizeX, lineBuffer);
        memOffset += sizeX;
        CS_LAT_BIT = 0;
        for(stretchY = 0; stretchY < stretch; stretchY++)
        {
            pData = lineBuffer;
            SetPointer(left, top + y, GetMaxX(), GetMaxY());
            WriteCommand(CMD_WRITE);
            for(x = 0; x < sizeX; x++)
            {

                // Read pixels from flash
                temp = *pData++;

                // Set color
                SetColor(pallete[temp]);

                // Write pixel to screen
                for(stretchX = 0; stretchX < stretch; stretchX++)
                {
                    WriteData(_color.v[1]);
                    WriteData(_color.v[0]);
                }
            }
        }

        CS_LAT_BIT = 1;
    }
}

/*********************************************************************
* Function: void PutImage16BPPExt(SHORT left, SHORT top, void* bitmap, BYTE stretch)
*
* PreCondition: none
*
* Input: left,top - left top image corner, bitmap - image pointer,
*        stretch - image stretch factor
*
* Output: none
*
* Side Effects: none
*
* Overview: outputs monochrome image starting from left,top coordinates
*
* Note: image must be located in flash
*
********************************************************************/
void PutImage16BPPExt(SHORT left, SHORT top, void *bitmap, BYTE stretch)
{
    register DWORD  memOffset;
    BITMAP_HEADER   bmp;
    WORD            lineBuffer[(GetMaxX() + 1)];
    WORD            *pData;
    WORD            byteWidth;

    WORD            temp;
    WORD            sizeX, sizeY;
    WORD            x, y;
    BYTE            stretchX, stretchY;

    // Get bitmap header
    ExternalMemoryCallback(bitmap, 0, sizeof(BITMAP_HEADER), &bmp);

    // Set offset to the image data
    memOffset = sizeof(BITMAP_HEADER);

    // Get size
    sizeX = bmp.width;
    sizeY = bmp.height;

    byteWidth = sizeX << 1;

    for(y = 0; y < sizeY; y++)
    {

        // Get line
        ExternalMemoryCallback(bitmap, memOffset, byteWidth, lineBuffer);
        memOffset += byteWidth;
        CS_LAT_BIT = 0;
        for(stretchY = 0; stretchY < stretch; stretchY++)
        {
            pData = lineBuffer;
            SetPointer(left, top + y, GetMaxX(), GetMaxY());
            WriteCommand(CMD_WRITE);
            for(x = 0; x < sizeX; x++)
            {

                // Read pixels from flash
                temp = *pData++;

                // Set color
                SetColor(temp);

                // Write pixel to screen
                for(stretchX = 0; stretchX < stretch; stretchX++)
                {
                    WriteData(_color.v[1]);
                    WriteData(_color.v[0]);
                }
            }
        }

        CS_LAT_BIT = 1;
    }
}

#endif
