// the C/D pin is low during write
void TFTLCD::writeCommand(uint16_t cmd) {
volatile uint8_t *wrportreg = portOutputRegister(wrport);
*portOutputRegister(csport) &= ~cspin;
//digitalWrite(_cs, LOW);
*portOutputRegister(cdport) &= ~cdpin;
//digitalWrite(_cd, LOW);
*portOutputRegister(rdport) |= rdpin;
//digitalWrite(_rd, HIGH);
*wrportreg |= wrpin;
//digitalWrite(_wr, HIGH);
setWriteDir();
write8(cmd >> 8);
*wrportreg &= ~wrpin;
//digitalWrite(_wr, LOW);
*wrportreg |= wrpin;
//digitalWrite(_wr, HIGH);
write8(cmd);
*wrportreg &= ~wrpin;
//digitalWrite(_wr, LOW);
*wrportreg |= wrpin;
//digitalWrite(_wr, HIGH);
*portOutputRegister(csport) |= cspin;
}
// Initialization common to both shield & breakout configs
void Adafruit_TFTLCD::init(void) {
#ifdef USE_ADAFRUIT_SHIELD_PINOUT
CS_IDLE; // Set all control bits to idle state
WR_IDLE;
RD_IDLE;
CD_DATA;
digitalWrite(5, HIGH); // Reset line
pinMode(A3, OUTPUT); // Enable outputs
pinMode(A2, OUTPUT);
pinMode(A1, OUTPUT);
pinMode(A0, OUTPUT);
pinMode( 5, OUTPUT);
#endif
setWriteDir(); // Set up LCD data port(s) for WRITE operations
rotation = 0;
cursor_y = cursor_x = 0;
textsize = 1;
textcolor = 0xFFFF;
_width = TFTWIDTH;
_height = TFTHEIGHT;
}
void TFTLCD::fillScreen(uint16_t color) {
goHome();
uint32_t i;
i = 320;
i *= 240;
*portOutputRegister(csport) &= ~cspin;
//digitalWrite(_cs, LOW);
*portOutputRegister(cdport) |= cdpin;
//digitalWrite(_cd, HIGH);
*portOutputRegister(rdport) |= rdpin;
//digitalWrite(_rd, HIGH);
*portOutputRegister(wrport) |= wrpin;
//digitalWrite(_wr, HIGH);
setWriteDir();
while (i--) {
writeData_unsafe(color);
}
*portOutputRegister(csport) |= cspin;
//digitalWrite(_cs, HIGH);
}
void TFTLCD::drawFastLine(uint16_t x, uint16_t y, uint16_t length,
uint16_t color, uint8_t rotflag)
{
uint16_t newentrymod;
switch (rotation) {
case 0:
if (rotflag)
newentrymod = 0x1028; // we want a 'vertical line'
else
newentrymod = 0x1030; // we want a 'horizontal line'
break;
case 1:
swap(x, y);
// first up fix the X
x = TFTWIDTH - x - 1;
if (rotflag)
newentrymod = 0x1000; // we want a 'vertical line'
else
newentrymod = 0x1028; // we want a 'horizontal line'
break;
case 2:
x = TFTWIDTH - x - 1;
y = TFTHEIGHT - y - 1;
if (rotflag)
newentrymod = 0x1008; // we want a 'vertical line'
else
newentrymod = 0x1020; // we want a 'horizontal line'
break;
case 3:
swap(x,y);
y = TFTHEIGHT - y - 1;
if (rotflag)
newentrymod = 0x1030; // we want a 'vertical line'
else
newentrymod = 0x1008; // we want a 'horizontal line'
break;
}
writeRegister(TFTLCD_ENTRY_MOD, newentrymod);
writeRegister(TFTLCD_GRAM_HOR_AD, x); // GRAM Address Set (Horizontal Address) (R20h)
writeRegister(TFTLCD_GRAM_VER_AD, y); // GRAM Address Set (Vertical Address) (R21h)
writeCommand(TFTLCD_RW_GRAM); // Write Data to GRAM (R22h)
*portOutputRegister(csport) &= ~cspin;
//digitalWrite(_cs, LOW);
*portOutputRegister(cdport) |= cdpin;
//digitalWrite(_cd, HIGH);
*portOutputRegister(rdport) |= rdpin;
//digitalWrite(_rd, HIGH);
*portOutputRegister(wrport) |= wrpin;
//digitalWrite(_wr, HIGH);
setWriteDir();
while (length--) {
writeData_unsafe(color);
}
// set back to default
*portOutputRegister(csport) |= cspin;
//digitalWrite(_cs, HIGH);
writeRegister(TFTLCD_ENTRY_MOD, 0x1030);
}