I have a design where I am trying to calculate the frequency of an incoming signal. I am using STM32CubeMX
and STM32CubeIDE combo. My process is to use "Live Expressions' within DEBUG to see the results. My platform
is STM32F303RE.
The code clip below is the CallBack Routine that is defines in my main.h file. The main.c snippet is as
follows:
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_2) // rising edge interrupt
{
// read capture value
IC_Val1 = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2); // first value
if (IC_Val1 != 0) // if the value is not 0
{
//read second value
IC_Val2 = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_3); // falling edge value
// calculate Duty cycle
Duty_Cycle = (IC_Val2*100/IC_Val1);
// calculate frequency
Frequency = (2*HAL_RCC_GetPCLK2Freq()/IC_Val1);
// As my timer2 clock is 2X the PCLK1 CLOCK, that's why X2.
}
else
{
Duty_Cycle = 0;
Frequency = 0;
}
}
}
The TIM2 setup within MX is:
The "Live Expression" window is a shown:
I added the PCLK2 HAL READ and LED_State to make sure I am using the tools correctly. These variables
are working fine in Live Expression.
A little professional help here would be highly appreciated.
Please take a look and see what is stopping these variables from being processed and viewed.
Thanks
