How Can I measure the input frequency by Timer Input Capture?

[dKim.1]

Hi

I measure the frequency from sensor using the Timer Input Capture mode.

I set the timer can read minimum 1Hz.

72M / 7200/65535 = 0.15Hz

This is my code.

void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
 HAL_GPIO_WritePin(LED_PORT, IN_LED_PIN, GPIO_PIN_SET);
 
 if (Is_First_Captured == 0)
 {
 IC_Value1 = HAL_TIM_ReadCapturedValue(&htim2, TIM_CHANNEL_2);
 //TIM2->CNT = 0;
 tim2_ovc = 0;
 Is_First_Captured = 1;
 }
 else if (Is_First_Captured)
 {
 IC_Value2 = HAL_TIM_ReadCapturedValue(&htim2, TIM_CHANNEL_2);
 
 if (IC_Value2 > IC_Value1)
 	Period = IC_Value2 - IC_Value1;
 else if (IC_Value2 < IC_Value1)
 {
 	Period = (htim2.Instance->ARR - IC_Value1) + IC_Value2; 
 }
 
 freq = (HAL_RCC_GetPCLK2Freq() * 2)/(htim2.Instance->PSC + 1);
 Frequency = freq/Period;
 Is_First_Captured = 0;
 } 
 }

But It can't measure the frequency. (When input frequency 1Hz,..)

What's wrong my code and setting?

Please help me..:sad_but_relieved_face: