/**
* Initialize the on-chip timer controller. We snag TMU channel 2 in its
* highest resolution mode, and start it counting down from max_int.
*/
void timer_init() {
unsigned int val = byte_read(TSTR);
byte_write( TSTR, val & (~(1<<TMU_CHANNEL)) ); /* Stop counter */
long_write( TCOR(TMU_CHANNEL), 0xFFFFFFFF );
long_write( TCNT(TMU_CHANNEL), 0xFFFFFFFF );
word_write( TCR(TMU_CHANNEL), 0x00000000 );
}
/**
Initialize the MAC timer. Called at powerup, or when you
want to clear all timers. Sets the timeout for each tick of the
system clock.
*/
void timerInit(void)
{
TIMER_INIT();
// Init the PRNG
if (NODE_TYPE == ROUTER || NODE_TYPE == COORD)
srand(TCNT(TICKTIMER));
TIMER_CLEAR();
// Enable timer output compare interrupt. -- Timer starts to interrupt as soon as Global interrup is enabled
TIMER_ENABLE();
}
/**
* Stop TMU2 and report the current value.
*/
unsigned int timer_stop() {
long_write( TSTR, long_read(TSTR) & (~(1<<TMU_CHANNEL)) );
return long_read( TCNT(TMU_CHANNEL) );
}
/**
* Report the current value of TMU2.
*/
unsigned int timer_gettime() {
return long_read(TCNT(TMU_CHANNEL));
}
