void LcdChr ( LcdFontSize size, byte ch )
{
byte i, c;
byte b1, b2;
int tmpIdx;

if ( LcdCacheIdx < LoWaterMark )
{
// Update low marker.
LoWaterMark = LcdCacheIdx;
}

if ( (ch < 0x20) || (ch > 0x7b) )
{
// Convert to a printable character.
ch = 92;
}

if ( size == FONT_1X )
{
for ( i = 0; i < 5; i++ )
{
LcdCache[LcdCacheIdx++] = FontLookup[ch - 32][i] << 1;
}
}
else if ( size == FONT_2X )
{
tmpIdx = LcdCacheIdx - 84;

if ( tmpIdx < LoWaterMark )
{
LoWaterMark = tmpIdx;
}

if ( tmpIdx < 0 ) return;

for ( i = 0; i < 5; i++ )
{
c = FontLookup[ch - 32][i] << 1;
b1 = (c & 0x01) * 3;
b1 |= (c & 0x02) * 6;
b1 |= (c & 0x04) * 12;
b1 |= (c & 0x08) * 24;

c >>= 4;
b2 = (c & 0x01) * 3;
b2 |= (c & 0x02) * 6;
b2 |= (c & 0x04) * 12;
b2 |= (c & 0x08) * 24;

LcdCache[tmpIdx++] = b1;
LcdCache[tmpIdx++] = b1;
LcdCache[tmpIdx + 82] = b2;
LcdCache[tmpIdx + 83] = b2;
}

// Update x cursor position.
LcdCacheIdx += 11;
}

if ( LcdCacheIdx > HiWaterMark )
{
// Update high marker.
HiWaterMark = LcdCacheIdx;
}

// Horizontal gap between characters.
LcdCache[LcdCacheIdx++] = 0x00;
}

/*--------------------------------------------------------------------------------------------------

Name : LcdStr

Description : Displays a character at current cursor location and increment cursor location
according to font size.

Argument(s) : size -> Font size. See enum.
dataPtr -> Pointer to null terminated ASCII string to display.

Return value : None.

--------------------------------------------------------------------------------------------------*/
void LcdStr ( LcdFontSize size, byte *dataPtr )
{
while ( *dataPtr )
{
LcdChr( size, *dataPtr++ );
}
}