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); }