void glcdBusyWait(uint8_t controller)
{
#ifdef GLCD_PORT_INTERFACE
cli();
// wait until LCD busy bit goes to zero
// select the controller chip
glcdControllerSelect(controller);
// do a read from control register
outb(GLCD_DATA_PORT, 0xFF);
cbi(GLCD_CTRL_PORT, GLCD_CTRL_RS);
outb(GLCD_DATA_DDR, 0x00);
sbi(GLCD_CTRL_PORT, GLCD_CTRL_RW);
sbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
asm volatile ("nop"); asm volatile ("nop");
while(inb(GLCD_DATA_PIN) & GLCD_STATUS_BUSY)
{
cbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
asm volatile ("nop"); asm volatile ("nop");
asm volatile ("nop"); asm volatile ("nop");
sbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
asm volatile ("nop"); asm volatile ("nop");
asm volatile ("nop"); asm volatile ("nop");
}
cbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW);
outb(GLCD_DATA_DDR, 0xFF);
sei();
#else
// sbi(MCUCR, SRW); // enable RAM waitstate
// wait until LCD busy bit goes to zero
while(*(volatile unsigned char *)
(GLCD_CONTROLLER0_CTRL_ADDR + GLCD_CONTROLLER_ADDR_OFFSET*controller) & GLCD_STATUS_BUSY);
// cbi(MCUCR, SRW); // disable RAM waitstate
#endif
}
void glcdBusyWait(u08 controller) {
// wait until LCD busy bit goes to zero
// select the controller chip
glcdControllerSelect(controller);
// do a read from control register
outb(GLCD_DATA_PORT, 0x00); // no pullups
outb(GLCD_DATA_DDR, 0x00);
sbi(GLCD_CTRL_PORT, GLCD_CTRL_RW);
cbi(GLCD_CTRL_PORT, GLCD_CTRL_RS);
sbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
NOP; NOP; NOP; NOP;
NOP; NOP; NOP; NOP;
while(inb(GLCD_DATA_PIN) & (GLCD_STATUS_BUSY | GLCD_STATUS_RESET));
cbi(GLCD_CTRL_PORT, GLCD_CTRL_E);
cbi(GLCD_CTRL_PORT, GLCD_CTRL_RW);
outb(GLCD_DATA_DDR, 0xFF); // output
}
