TIM2->CCR2 Value Always Zero

[Bahadir(Canceled)]

Hi,

I am running Capture Mode at TIM2 channel 1. My CubeMx configuration below. I am getting CCR1 value correctly but i checked at debugger mode, CCR2 value is always 0. Thus i can't measure duty. What's the problem ?

[waclawek.jan]

In that screenshot, Channel2 shows Disable, so it does not capture.

JW

[Bahadir(Canceled)]

I am trying convert legacy SPL code to HAL. It was written for F091 at 48MHz.Legacy code below.

I working on L072RB at 32Mhz.

void Config_PulseInputFreqEnable(void)
{
GPIO_InitTypeDef					GPIO_InitStructure;
TIM_ICInitTypeDef					TIM_ICInitStructure;
TIM_TimeBaseInitTypeDef		TIM_TimeBaseStructure;
NVIC_InitTypeDef   NVIC_InitStructure;
	
	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
	GPIO_InitStructure.GPIO_Pin 		= GPIO_Pin_5;
	GPIO_InitStructure.GPIO_Mode		= GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed 	= GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_PuPd 		= GPIO_PuPd_UP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_2);
 
/* ---------------------------------------------------
	TIM2 Configuration :PWM Input
  TIM2 input clock (TIM2CLK) is set to APB1 clock (PCLK1)
  TIM2CLK = PCLK1 => TIM2CLK = HCLK = SystemCoreClock
  ----------------------------------------------------------------------- */
	/* TIM2 Periph clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
	/* TIM2 Configuration */
  TIM_DeInit(TIM2);
	/* Time base configuration */
  TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_TimeBaseStructure.TIM_Prescaler			= (SystemCoreClock / 1000000) - 1; // 1 MHz, from 48 MHz
  TIM_TimeBaseStructure.TIM_Period				= 0xFFFFFFFF; // Maximal, TIM2 is 32-bit counter
  TIM_TimeBaseStructure.TIM_ClockDivision	= 0x0;
  TIM_TimeBaseStructure.TIM_CounterMode		= TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
	
	TIM_ICInitStructure.TIM_ICPolarity		= TIM_ICPolarity_Rising; // Rising/Falling/BothEdge
  TIM_ICInitStructure.TIM_ICSelection		= TIM_ICSelection_DirectTI;
  TIM_ICInitStructure.TIM_ICPrescaler		= TIM_ICPSC_DIV1;
  TIM_ICInitStructure.TIM_ICFilter			= 0x0;
	
	TIM_ICInitStructure.TIM_Channel				= TIM_Channel_1;
	TIM_PWMIConfig(TIM2, &TIM_ICInitStructure);
 
 /* Select the TIM2 Input Trigger: TI1FP1 */
  TIM_SelectInputTrigger(TIM2, TIM_TS_TI1FP1);
	
  /* Select the slave Mode: Reset Mode */
  TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Reset);
  TIM_SelectMasterSlaveMode(TIM2,TIM_MasterSlaveMode_Enable);
 
  /* TIM enable counter */
  TIM_Cmd(TIM2, ENABLE);
	
	TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
			
	 /* Enable and set TIM2 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel					= TIM2_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPriority	= 0x00;
  NVIC_InitStructure.NVIC_IRQChannelCmd				= ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

After that some calculation at below.

PulsePeriod	= TIM2->CCR1;
PulseDuty		= TIM2->CCR2;
PulseRemain	= TIM2->ARR - TIM2->CNT;
 
ExtPulseFreq		= 10000000/PulsePeriod;
ExtPulseDuty		= PulseDuty * 1000 / PulsePeriod;

I observe this code at debugger mode with F0 (SPL Code), there is a CCR2 value. But I observe at L0 (HAL Code) CCR2 value is 0.

Am i missing something ?

By the way JW thank you so much for your helping.

[TDK]

If the L0/HAL code is the one not working, why are you showing the working F0/SPL code? How will that help? Did you fix the problem that JW pointed out?

[Bahadir(Canceled)]

Because i just want to be ensure that converting is correct. But maybe i have a mistake. At F0/SPL code Timer2-Channel2 is disable too but there ise CCR2 value. But at L0/HAL code there is no CCR2 value. I just want to know do i have a mistake anywhere?

I also don't understand why you're so angry.

[waclawek.jan · Accepted solution]

> At F0/SPL code Timer2-Channel2 is disable too

No, it is not. It may be not apparent at the first sight, but the code above calls TIM_PWMIConfig() function which sets *both* CH1 and CH2. SPL is open source, read it.

JW

[Bahadir(Canceled)]

Thank you JW. I review this function and i found solution described as below. Now CCR2 is works.