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[components/drivers/hwtimer]修复定时器向下计数模式时时间获取错误bug

This commit is contained in:
misonyo 2018-12-25 09:59:16 +08:00
parent 0b79f45075
commit 3b4bb18c06
1 changed files with 1 additions and 1 deletions
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2
components/drivers/hwtimer/hwtimer.c
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@ -153,7 +153,7 @@ static rt_size_t rt_hwtimer_read(struct rt_device *dev, rt_off_t pos, void *buff
cnt = timer->ops->count_get(timer); cnt = timer->ops->count_get(timer);
if (timer->info->cntmode == HWTIMER_CNTMODE_DW) if (timer->info->cntmode == HWTIMER_CNTMODE_DW)
{ {
cnt = timer->info->maxcnt - cnt; cnt = (timer->freq * timer->period_sec) - cnt;
} }
t = timer->overflow * timer->period_sec + cnt/(float)timer->freq; t = timer->overflow * timer->period_sec + cnt/(float)timer->freq;