void fatal_interrupt ()
{
/* Infinite loop for debugging
Returning would not help as it's necessary to clear the interrupt flag.
*/
for (;;) cop_optional_reset();
}
void
__premain (void)
{
// in case special mode enabled, avoid conflict on PORTE
PEAR |= NECLK;
// bgnd mode stops COP and RTI clocks
COPCTL = RSBCK;
// stops TCNT counter when debugging stops
TSCR1 |= (1<<5); // TFRZ
// PLL
CLKSEL = 0; // disable PLL to configure
// xtal 16MHz, bus 24MHz
SYNR = 3 - 1;
REFDV = 2 - 1;
while (!(CRGFLG & 0x08)) // wait for PLL LOCK
cop_optional_reset();
CLKSEL |= 0x80; // use PLL
// init switch inputs
PERH = 0xff; // pullups
// outputs
#if PORT_LED==M6811_PORTB //PORTB
DDRB = 0xff; // init LED
#elif PORT_LED==M6811_PORTA //PORTA
DDRA = 0xff;
#elif PORT_LED==M6811_PTT //PTT
DDRT = 0xff;
#elif PORT_LED==M6811_PTM //PTM
DDRM = 0xff;
#elif PORT_LED==M6811_PTP //PTP
DDRP = 0xff;
#elif PORT_LED==M6811_PTH //PTH
DDRH = 0xff;
#endif
}