u08 glcdDataRead(u08 dummy)
{
register u08 data;
register u08 controller = (GrLcdState.lcdXAddr/GLCD_CONTROLLER_XPIXELS);
glcdBusyWait(controller); // wait until LCD not busy
outb(GLCD_DATA_PORT, 0x00); // no pullups
outb(GLCD_DATA_DDR, 0x00); // don't drive data lines
GLCD_CTRL_PORT |= _BV(GLCD_CTRL_RS) |
_BV(GLCD_CTRL_RW) | _BV(GLCD_CTRL_E);
NOP; NOP; NOP; NOP;
NOP; NOP; NOP; NOP;
data = inb(GLCD_DATA_PIN);
GLCD_CTRL_PORT &= ~(_BV(GLCD_CTRL_RS) |
_BV(GLCD_CTRL_RW) | _BV(GLCD_CTRL_E));
if(!dummy) {
// increment our local address counter, not done for dummy reads
GrLcdState.ctrlr[controller].xAddr++;
GrLcdState.lcdXAddr++;
if(GrLcdState.lcdXAddr >= GLCD_XPIXELS) {
glcdSetYAddress(GrLcdState.lcdYAddr+1);
glcdSetXAddress(0);
}
}
return data;
}
void glcdDataWrite(u08 data) {
register u08 controller = (GrLcdState.lcdXAddr/GLCD_CONTROLLER_XPIXELS);
glcdBusyWait(controller); // wait until LCD not busy
outb(GLCD_DATA_DDR, 0xFF);
outb(GLCD_DATA_PORT, data);
sbi(GLCD_CTRL_PORT, GLCD_CTRL_RS);
cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW);
sbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
NOP; NOP; NOP; NOP;
NOP; NOP; NOP; NOP;
cbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
// increment our local address counter
GrLcdState.ctrlr[controller].xAddr++;
GrLcdState.lcdXAddr++;
if(GrLcdState.lcdXAddr >= GLCD_XPIXELS) {
glcdSetYAddress(GrLcdState.lcdYAddr+1);
glcdSetXAddress(0);
}
}
void glcdDataWrite(uint8_t data)
{
register uint8_t controller = (GrLcdState.lcdXAddr/GLCD_CONTROLLER_XPIXELS);
#ifdef GLCD_PORT_INTERFACE
cli();
glcdBusyWait(controller); // wait until LCD not busy
sbi(GLCD_CTRL_PORT, GLCD_CTRL_RS);
cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW);
sbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
outb(GLCD_DATA_DDR, 0xFF);
outb(GLCD_DATA_PORT, data);
asm volatile ("nop"); asm volatile ("nop");
asm volatile ("nop"); asm volatile ("nop");
asm volatile ("nop"); asm volatile ("nop");
asm volatile ("nop"); asm volatile ("nop");
cbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
sei();
#else
//sbi(MCUCR, SRW); // enable RAM waitstate
glcdBusyWait(controller); // wait until LCD not busy
*(volatile unsigned char *) (GLCD_CONTROLLER0_CTRL_ADDR + GLCD_CONTROLLER_ADDR_OFFSET*controller) = data;
//cbi(MCUCR, SRW); // disable RAM waitstate
#endif
// increment our local address counter
GrLcdState.ctrlr[controller].xAddr++;
GrLcdState.lcdXAddr++;
if(GrLcdState.lcdXAddr >= GLCD_XPIXELS)
{
GrLcdState.lcdYAddr++;
glcdSetYAddress(GrLcdState.lcdYAddr);
glcdSetXAddress(0);
}
}
void glcdSetAddress(u08 x, u08 yLine) {
// set addresses
glcdSetYAddress(yLine);
glcdSetXAddress(x);
}
void glcdSetAddress(uint8_t x, uint8_t yLine)
{
// set addresses
glcdSetYAddress(yLine);
glcdSetXAddress(x);
}
