void TIM2_IRQHandler(void)
{
/* Clear TIM2 Capture compare interrupt pending bit */
TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);
/* Get the Input Capture value */
IC2Value = TIM_GetCapture2(TIM2);
if (IC2Value != 0)
{
/* Duty cycle computation */
DutyCycle = (TIM_GetCapture1(TIM2) * 100) / IC2Value;
/* Frequency computation */
Frequency = 72000000 / IC2Value;
}
else
{
DutyCycle = 0;
Frequency = 0;
}
}
就是这里，为什么计算占空比的时候要乘以100呢。 |
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