void LCDDisplay::Plot(UINT X, UINT Y, Color C)
{
WORD Address;
BYTE BitSetCommand;
if ((X > MaxX) || (Y > MaxY))
IgnorableError(LCDDisplay_PlotOutOfBounds);
else
{
Address = (30*Y+X/8)+GraphicsHomeAddress;
// Now that we know what byte contains the specified dot,
// set the LCD display address pointer to point to that
// location
LCDWriteData(LOBYTE(Address));
LCDWriteData(HIBYTE(Address));
LCDWriteCommand(0x24); // address pointer set command
// Set or clear the correct bit at that address.
// Figure out which bit in that byte to set.
BitSetCommand = 7 - (X % 8);
// Set the color of the bit.
if (C == Black)
BitSetCommand = BitSetCommand | 0x08; // Set the bit
// Finish the command
BitSetCommand = BitSetCommand | 0xF0;
LCDWriteCommand(BitSetCommand);
}
}
// Configure display controller to write to defined display area
void LCDAddressWindow(const tRectangle *pRect)
{
#ifdef PORTRAIT
LCDWriteCommand(ILI_HOR_START_AD);
LCDWriteData(pRect->sXMin);
LCDWriteCommand(ILI_HOR_END_AD);
LCDWriteData(pRect->sXMax);
LCDWriteCommand(ILI_VER_START_AD);
LCDWriteData(pRect->sYMin);
LCDWriteCommand(ILI_VER_END_AD);
LCDWriteData(pRect->sYMax);
#else
LCDWriteCommand(ILI_HOR_START_AD);
LCDWriteData(LCD_X - pRect->sYMax);
LCDWriteCommand(ILI_HOR_END_AD);
LCDWriteData(LCD_X - pRect->sYMin);
LCDWriteCommand(ILI_VER_START_AD);
LCDWriteData(pRect->sXMin);
LCDWriteCommand(ILI_VER_END_AD);
LCDWriteData(pRect->sXMax);
#endif
// Set pointer to first address in that window
LCDGoto(pRect->sXMin, pRect->sYMin);
}
void Adafruit320x240x16_ILI9325PixelDrawMultiple(void *pvDisplayData,
long lX, long lY, long lX0, long lCount, long lBPP,
const unsigned char *pucData,
const unsigned char *pucPalette)
{
// Start talking to LCD
LCD_CS_ACTIVE
#ifdef LANDSCAPE
// Configure write direction to horizontal
LCDWriteCommand(ILI_ENTRY_MOD);
LCDWriteData(0x1038);
#endif
LCDGoto(lX,lY);
unsigned long ulPixel = 0;
unsigned long ulColor = 0;
if(lBPP == 1)
{
// 1 bit per pixel in pucData
// lX0 is the index of the bit processed within a byte
// pucPalette holds the pre-translated 32bit display color
while(lCount)
{
ulPixel = *pucData++;
while(lCount && lX0 < 8) // while there are pixels in this byte
{
ulColor = ((unsigned long *)pucPalette)[ulPixel & 1]; // retrieve already translated color
LCDWriteData(ulColor);
lCount--; // processed another pixel
lX0++; // done with this bit
ulPixel >>= 1; // prepare next bit
}
lX0 = 0; // process next byte, reset bit counter
}
}
else if(lBPP == 4)
// Coordinates of next display write
void LCDGoto(unsigned short x, unsigned short y)
{
if(x >= LCD_WIDTH) x = LCD_WIDTH - 1;
if(y >= LCD_HEIGHT) y = LCD_HEIGHT - 1;
#ifdef PORTRAIT
LCDWriteCommand(ILI_GRAM_HOR_AD); // GRAM Address Set (Horizontal Address) (R20h)
LCDWriteData(x);
LCDWriteCommand(ILI_GRAM_VER_AD); // GRAM Address Set (Vertical Address) (R21h)
LCDWriteData(y);
LCDWriteCommand(ILI_RW_GRAM); // Write Data to GRAM (R22h)
#else
LCDWriteCommand(ILI_GRAM_HOR_AD); // GRAM Address Set (Horizontal Address) (R20h)
LCDWriteData(LCD_X - y);
LCDWriteCommand(ILI_GRAM_VER_AD); // GRAM Address Set (Vertical Address) (R21h)
LCDWriteData(x);
LCDWriteCommand(ILI_RW_GRAM); // Write Data to GRAM (R22h)
#endif
g_usPosX = x;
g_usPosY = y;
}
// Initializing display
void Adafruit320x240x16_ILI9325Init(void)
{
unsigned short usAddress, usData;
// Reset global variables
g_ulWait1ms = SysCtlClockGet() / (3 * 1000);
// Enable GPIO peripherals
SysCtlPeripheralEnable(LCD_DATA_PERIPH);
SysCtlPeripheralEnable(LCD_CS_PERIPH);
SysCtlPeripheralEnable(LCD_CD_PERIPH);
SysCtlPeripheralEnable(LCD_WR_PERIPH);
SysCtlPeripheralEnable(LCD_RD_PERIPH);
SysCtlPeripheralEnable(LCD_RST_PERIPH);
SysCtlPeripheralEnable(LCD_BKLT_PERIPH);
// Configure pins, all output
GPIOPinTypeGPIOOutput(LCD_DATA_BASE, LCD_DATA_PINS);
GPIOPinTypeGPIOOutput(LCD_CS_BASE, LCD_CS_PIN);
GPIOPinTypeGPIOOutput(LCD_CD_BASE, LCD_CD_PIN);
GPIOPinTypeGPIOOutput(LCD_WR_BASE, LCD_WR_PIN);
GPIOPinTypeGPIOOutput(LCD_RD_BASE, LCD_RD_PIN);
GPIOPinTypeGPIOOutput(LCD_BKLT_BASE, LCD_BKLT_PIN);
GPIOPinTypeGPIOOutput(LCD_RST_BASE, LCD_RST_PIN);
// Set control pins to idle/off state
LCD_CS_IDLE
LCD_RD_IDLE
LCD_WR_IDLE
LCD_BKLT_OFF
// Reset LCD
LCD_RST_ACTIVE
LCD_DELAY(50);
LCD_RST_IDLE
LCD_DELAY(50);
// Talk to LCD for init
LCD_CS_ACTIVE
// Sync communication
LCDWriteData(0);
LCDWriteData(0);
LCDWriteData(0);
LCDWriteData(0);
LCD_DELAY(50);
// Process initialization sequence of display driver
int i = 0;
while(usInitScript[i] != ILI_STOPCMD)
{
usAddress = usInitScript[i++];
usData = usInitScript[i++];
if(usAddress == ILI_DELAYCMD)
{
LCD_DELAY(usData);
}
else
{
LCDWriteCommand(usAddress);
LCDWriteData(usData);
}
}
// Clear display of any stray pixels
LCDClear();
// Done talking to LCD
LCD_CS_IDLE
// Turn back light on
LCD_BKLT_ON
return;
}
