//*****************************************************************************
//
//! Clears the OLED display.
//!
//! This function will clear the display RAM. All pixels in the display will
//! be turned off.
//!
//! \return None.
//
//*****************************************************************************
void
RIT128x96x4Clear(void)
{
static const unsigned char pucCommand1[] = { 0x15, 0, 63 };
static const unsigned char pucCommand2[] = { 0x75, 0, 127 };
unsigned long ulRow, ulColumn;
//
// Clear out the buffer used for sending bytes to the display.
//
*(unsigned long *)&g_pucBuffer[0] = 0;
*(unsigned long *)&g_pucBuffer[4] = 0;
//
// Set the window to fill the entire display.
//
RITWriteCommand(pucCommand1, sizeof(pucCommand1));
RITWriteCommand(pucCommand2, sizeof(pucCommand2));
RITWriteCommand(g_pucRIT128x96x4HorizontalInc,
sizeof(g_pucRIT128x96x4HorizontalInc));
//
// Loop through the rows
//
for(ulRow = 0; ulRow < 96; ulRow++)
{
//
// Loop through the columns. Each byte is two pixels,
// and the buffer hold 8 bytes, so 16 pixels are cleared
// at a time.
//
for(ulColumn = 0; ulColumn < 128; ulColumn += 8 * 2)
{
//
// Write 8 clearing bytes to the display, which will
// clear 16 pixels across.
//
RITWriteData(g_pucBuffer, sizeof(g_pucBuffer));
}
}
}
void LCM_WriteByte(unsigned char x, unsigned char y, unsigned char bak)
{
unsigned char pucCommand1[3] = { 0x15, 0, 0 };
unsigned char pucCommand2[3] = { 0x75, 0, 0 };
g_pucBuffer[0] = bak;
pucCommand1[1] = x>>1;
pucCommand1[2] = x>>1;
pucCommand2[1] = y;
pucCommand2[2] = y;
// Set the window to fill the entire display.
//
RITWriteCommand(pucCommand1, sizeof(pucCommand1));
RITWriteCommand(pucCommand2, sizeof(pucCommand2));
RITWriteCommand(g_pucRIT128x96x4HorizontalInc,
sizeof(g_pucRIT128x96x4HorizontalInc));
RITWriteData(g_pucBuffer, 1);
}
//*****************************************************************************
//
//! Displays a string on the OLED display.
//!
//! \param pcStr is a pointer to the string to display.
//! \param ulX is the horizontal position to display the string, specified in
//! columns from the left edge of the display.
//! \param ulY is the vertical position to display the string, specified in
//! rows from the top edge of the display.
//! \param ucLevel is the 4-bit gray scale value to be used for displayed text.
//!
//! This function will draw a string on the display. Only the ASCII characters
//! between 32 (space) and 126 (tilde) are supported; other characters will
//! result in random data being draw on the display (based on whatever appears
//! before/after the font in memory). The font is mono-spaced, so characters
//! such as ``i'' and ``l'' have more white space around them than characters
//! such as ``m'' or ``w''.
//!
//! If the drawing of the string reaches the right edge of the display, no more
//! characters will be drawn. Therefore, special care is not required to avoid
//! supplying a string that is ``too long'' to display.
//!
//! \note Because the OLED display packs 2 pixels of data in a single byte, the
//! parameter \e ulX must be an even column number (for example, 0, 2, 4, and
//! so on).
//!
//! \return None.
//
//*****************************************************************************
void
RIT128x96x4StringDraw(const char *pcStr, unsigned long ulX,
unsigned long ulY, unsigned char ucLevel)
{
unsigned long ulIdx1, ulIdx2;
unsigned char ucTemp;
//
// Check the arguments.
//
ASSERT(ulX < 128);
ASSERT((ulX & 1) == 0);
ASSERT(ulY < 96);
ASSERT(ucLevel < 16);
//
// Setup a window starting at the specified column and row, ending
// at the right edge of the display and 8 rows down (single character row).
//
g_pucBuffer[0] = 0x15;
g_pucBuffer[1] = ulX / 2;
g_pucBuffer[2] = 63;
RITWriteCommand(g_pucBuffer, 3);
g_pucBuffer[0] = 0x75;
g_pucBuffer[1] = ulY;
g_pucBuffer[2] = ulY + 7;
RITWriteCommand(g_pucBuffer, 3);
RITWriteCommand(g_pucRIT128x96x4VerticalInc,
sizeof(g_pucRIT128x96x4VerticalInc));
//
// Loop while there are more characters in the string.
//
while(*pcStr != 0)
{
//
// Get a working copy of the current character and convert to an
// index into the character bit-map array.
//
ucTemp = *pcStr++ & 0x7f;
if(ucTemp < ' ')
{
ucTemp = 0;
}
else
{
ucTemp -= ' ';
}
//
// Build and display the character buffer.
//
for(ulIdx1 = 0; ulIdx1 < 6; ulIdx1 += 2)
{
//
// Convert two columns of 1-bit font data into a single data
// byte column of 4-bit font data.
//
for(ulIdx2 = 0; ulIdx2 < 8; ulIdx2++)
{
g_pucBuffer[ulIdx2] = 0;
if(g_pucFont[ucTemp][ulIdx1] & (1 << ulIdx2))
{
g_pucBuffer[ulIdx2] = (ucLevel << 4) & 0xf0;
}
if((ulIdx1 < 4) &&
(g_pucFont[ucTemp][ulIdx1 + 1] & (1 << ulIdx2)))
{
g_pucBuffer[ulIdx2] |= (ucLevel << 0) & 0x0f;
}
}
//
// Send this byte column to the display.
//
RITWriteData(g_pucBuffer, 8);
ulX += 2;
//
// Return if the right side of the display has been reached.
//
if(ulX == 128)
{
return;
}
}
}
}
