STM32 Timer interrupt period - timer

Question

I am using a STM32F401RE board and I want a timer interrupt to happen every X seconds (let's say 60 seconds).
The interrupt callback works. The problem is the interrupt does not happen every 60 seconds (it does every 34 seconds). I have tried different values for prescaler and period but nothing I try is working as I want.
I am using the functions generated by CubeMX in another project:
main.c
TIM_HandleTypeDef htim10;
int main(void)
{
HAL_Init();
SystemClock_Config();
// Some other code
MX_TIM10_Init();
HAL_TIM_Base_Start_IT(&htim10);
while (1)
{
}
}
static void MX_TIM10_Init(void)
{
htim10.Instance = TIM10;
htim10.Init.Prescaler = 35999;
htim10.Init.CounterMode = TIM_COUNTERMODE_UP;
htim10.Init.Period = 60000;
htim10.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
if (HAL_TIM_Base_Init(&htim10) != HAL_OK)
{
Error_Handler();
}
}
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
if(htim->Instance==TIM10)
{
printf("ABCDEFG\n\r");
}
}
void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 16;
RCC_OscInitStruct.PLL.PLLN = 288;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
RCC_OscInitStruct.PLL.PLLQ = 6;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1);
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
__HAL_RCC_SYSCFG_CLK_ENABLE();
}
stm32f4xx_hal_msp.c
void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
{
if(htim_base->Instance==TIM10)
{
__HAL_RCC_TIM10_CLK_ENABLE();
HAL_NVIC_SetPriority(TIM1_UP_TIM10_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(TIM1_UP_TIM10_IRQn);
}
}
void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* htim_base)
{
if(htim_base->Instance==TIM10)
{
__HAL_RCC_TIM10_CLK_DISABLE();
HAL_NVIC_DisableIRQ(TIM1_UP_TIM10_IRQn);
}
}
stm32f4xx_it.c
void TIM1_UP_TIM10_IRQHandler(void)
{
HAL_TIM_IRQHandler(&htim10);
}
Can anyone explain me what I am doing wrong? How do I configure the timer parameters to achieve the period that I want?
Thank you in advance!

Answer 1

can you capture your CubeMX's Clock Configuration screen of your project, it make me diagnose your issue easier!
EDIT 1: I check your code, the Timer 10 is run by APB2 clock source so your timer 10's clock is running twice times faster. You should config your code like this:
static void MX_TIM10_Init(void)
{
htim10.Instance = TIM10;
htim10.Init.Prescaler = 35999;
htim10.Init.CounterMode = TIM_COUNTERMODE_UP;
htim10.Init.Period = 60000;
htim10.Init.ClockDivision = TIM_CLOCKDIVISION_DIV2; //TIM_CLOCKDIVISION_DIV1
if (HAL_TIM_Base_Init(&htim10) != HAL_OK)
{
Error_Handler();
}
}
Frankie

Answer 2

add the function below called MX_NVIC_Init(); to the main() function
static void MX_NVIC_Init(void)
{
HAL_NVIC_SetPriority(TIM1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(TIM10_IRQn);
}