// ------------------------------------------------------------
// enables the SIT clock if not already enabled, then checks to
// see if any SITs are available for use. if one is available,
// it's initialized and started with the specified value, and
// the function returns true, otherwise it returns false
// ------------------------------------------------------------
bool IntervalTimer::allocate_SIT(intPeriod Period, bool scale, TIMid id) {
if (id < NUM_SIT) { // Allocate specified timer (id=TIMER3/4/5) or auto-allocate from pool (id=AUTO)
if (!SIT_used[id]) {
SIT_id = id;
start_SIT(Period, scale);
SIT_used[id] = true;
return true;
}
}
else {
// Auto allocate - check for an available SIT, and if so, start it
for (uint8_t tid = 0; tid < NUM_SIT; tid++) {
if (!SIT_used[tid]) {
SIT_id = tid;
start_SIT(Period, scale);
SIT_used[tid] = true;
return true;
}
}
}
// Specified or no auto-allocate SIT available
return false;
}
// ------------------------------------------------------------
// enables the SIT clock if not already enabled, then checks to
// see if any SITs are available for use. if one is available,
// it's initialized and started with the specified value, and
// the function returns true, otherwise it returns false
// ------------------------------------------------------------
bool IntervalTimer::allocate_SIT(uint16_t newValue, bool scale) {
// check for an available SIT, and if so, start it
for (uint8_t id = 0; id < NUM_SIT; id++) {
if (!SIT_used[id]) {
SIT_id = id;
start_SIT(newValue, scale);
SIT_used[id] = true;
return true;
}
}
// no SIT available
return false;
}
