stm32l4xx_hal_timebase.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32l4xx_hal.h"
#include "stm32l4xx_hal_tim.h"
 
/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef htim17;
 
HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
{
    HAL_StatusTypeDef result;
    RCC_ClkInitTypeDef rccClockConfig = {0U};
    uint32_t clockFrequency           = 0U;
    uint32_t clockPrescaler           = 0U;
    uint32_t flashLatency;
 
    /* Set the global tick interrupt priority variable */
    uwTickPrio = TickPriority;
 
    /* Configure the timer IRQ priority */
    HAL_NVIC_SetPriority(TIM1_TRG_COM_TIM17_IRQn, TickPriority, 0U);
 
    /* Enable the timer global Interrupt */
    HAL_NVIC_EnableIRQ(TIM1_TRG_COM_TIM17_IRQn);
 
    /* Enable timer clock */
    __HAL_RCC_TIM17_CLK_ENABLE();
 
    /* Compute the prescaler value to have the timer clock equal to 1MHz */
    HAL_RCC_GetClockConfig(&rccClockConfig, &flashLatency);
    clockFrequency = HAL_RCC_GetPCLK2Freq();
    clockPrescaler = (uint32_t)((clockFrequency / 1000000U) - 1U);
 
    /* Initialize timer */
    htim17.Instance           = TIM17;
    htim17.Init.CounterMode   = TIM_COUNTERMODE_UP;
    htim17.Init.ClockDivision = 0U;
    htim17.Init.Period        = (1000000U / 1000U) - 1U;
    htim17.Init.Prescaler     = clockPrescaler;
 
    result = HAL_TIM_Base_Init(&htim17);
    if(result == HAL_OK)
    {
        /* Start the TIM time Base generation in interrupt mode */
        result = HAL_TIM_Base_Start_IT(&htim17);
    }
 
    return result;
}
 
void HAL_SuspendTick(void)
{
    __HAL_TIM_DISABLE_IT(&htim17, TIM_IT_UPDATE);
}
 
void HAL_ResumeTick(void)
{
    __HAL_TIM_ENABLE_IT(&htim17, TIM_IT_UPDATE);
}