void us_ticker_init(void)
{
if (us_ticker_inited) return;
us_ticker_inited = 1;
// Initial a G-Timer
TimerAdapter.IrqDis = 1; // Disable Irq
TimerAdapter.IrqHandle.IrqFun = (IRQ_FUN) _us_ticker_irq_handler;
TimerAdapter.IrqHandle.IrqNum = TIMER2_7_IRQ;
TimerAdapter.IrqHandle.Priority = 0x20;
TimerAdapter.IrqHandle.Data = (u32)NULL;
TimerAdapter.TimerId = APP_TIM_ID;
TimerAdapter.TimerIrqPriority = 0;
TimerAdapter.TimerLoadValueUs = 1;
TimerAdapter.TimerMode = FREE_RUN_MODE; // Countdown Free Run
HalTimerOp.HalTimerInit((VOID*) &TimerAdapter);
DBG_TIMER_INFO("%s: Timer_Id=%d\n", __FUNCTION__, APP_TIM_ID);
}
void us_ticker_set_interrupt(timestamp_t timestamp)
{
uint32_t tick_cnt;
uint32_t cur_tick_cnt;
uint32_t time_def;
tick_cnt = (uint32_t)timestamp/TIMER_TICK_US;
cur_tick_cnt = 0xffffffff - HalTimerOp.HalTimerReadCount(SYS_TIM_ID);
if (tick_cnt > cur_tick_cnt) {
time_def = tick_cnt - cur_tick_cnt;
}
else {
time_def = 0xffffffff - cur_tick_cnt + tick_cnt;
}
TimerAdapter.IrqDis = 0; // Enable Irq
TimerAdapter.TimerLoadValueUs = time_def * TIMER_TICK_US;
TimerAdapter.TimerMode = USER_DEFINED; // Countdown Free Run
HalTimerOp.HalTimerInit((VOID*) &TimerAdapter);
}
void us_ticker_set_interrupt(timestamp_t timestamp)
{
uint32_t cur_time_us;
uint32_t time_def;
cur_time_us = us_ticker_read();
if ((uint32_t)timestamp >= cur_time_us) {
time_def = (uint32_t)timestamp - cur_time_us;
}
else {
time_def = 0xffffffff - cur_time_us + (uint32_t)timestamp;
}
if (time_def < TIMER_TICK_US) {
time_def = TIMER_TICK_US; // at least 1 tick
}
TimerAdapter.IrqDis = 0; // Enable Irq
TimerAdapter.TimerLoadValueUs = time_def;
TimerAdapter.TimerMode = USER_DEFINED; // Countdown Free Run
HalTimerOp.HalTimerInit((VOID*) &TimerAdapter);
}
