/**
  ******************************************************************************
  * @file    py32f4xx_hal_timebase_tim.c 
  * @author  MCU Application Team
  * @brief   HAL time base based on the hardware TIM.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2023 Puya Semiconductor Co.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by Puya under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "py32f0xx_hal.h"
#include "py32f040_hal_tim.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
TIM_HandleTypeDef        TimHandle;

/* Private function prototypes -----------------------------------------------*/
void TIM14_IRQHandler(void);

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  This function configures the TIM14 as a time base source. 
  *         The time source is configured  to have 1ms time base with a dedicated 
  *         Tick interrupt priority. 
  * @note   This function is called  automatically at the beginning of program after
  *         reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig(). 
  * @param  TickPriority: Tick interrupt priority.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_InitTick (uint32_t TickPriority)
{
  RCC_ClkInitTypeDef    clkconfig = {0};
  uint32_t              uwTimclock = 0;
  uint32_t              uwAPB1Prescaler = 0;
  uint32_t              uwPrescalerValue = 0;
  uint32_t              pFLatency = 0;
  
  /*Configure the TIM14 IRQ priority */
  HAL_NVIC_SetPriority(TIM14_IRQn, TickPriority ,0U);
  
  /* Enable the TIM14 global Interrupt */
  HAL_NVIC_EnableIRQ(TIM14_IRQn);
  
  /* Enable TIM14 clock */
  __HAL_RCC_TIM14_CLK_ENABLE();
  
  /* Get clock configuration */
  HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
  
  /* Get APB1 prescaler */
  uwAPB1Prescaler = clkconfig.APB1CLKDivider;
  
  /* Compute TIM14 clock */
  if (uwAPB1Prescaler == RCC_HCLK_DIV1) 
  {
    uwTimclock = HAL_RCC_GetPCLK1Freq();
  }
  else
  {
    uwTimclock = 2*HAL_RCC_GetPCLK1Freq();
  }
  
  /* Compute the prescaler value to have TIM14 counter clock equal to 1MHz */
  uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000U) - 1U);
  
  /* Initialize TIM14 */
  TimHandle.Instance = TIM14;
  
  /* Initialize TIMx peripheral as follow:
  + Period = [(TIM14CLK/1000) - 1]. to have a (1/1000) s time base.
  + Prescaler = (uwTimclock/1000000 - 1) to have a 1MHz counter clock.
  + ClockDivision = 0
  + Counter direction = Up
  */
  TimHandle.Init.Period = (1000000U / 1000U) - 1U;
  TimHandle.Init.Prescaler = uwPrescalerValue;
  TimHandle.Init.ClockDivision = 0;
  TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
  TimHandle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if(HAL_TIM_Base_Init(&TimHandle) == HAL_OK)
  {
    /* Start the TIM time Base generation in interrupt mode */
    return HAL_TIM_Base_Start_IT(&TimHandle);
  }
  
  /* Return function status */
  return HAL_ERROR;
}

/**
  * @brief  Suspend Tick increment.
  * @note   Disable the tick increment by disabling TIM14 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_SuspendTick(void)
{
  /* Disable TIM14 update Interrupt */
  __HAL_TIM_DISABLE_IT(&TimHandle, TIM_IT_UPDATE);
}

/**
  * @brief  Resume Tick increment.
  * @note   Enable the tick increment by Enabling TIM14 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_ResumeTick(void)
{
  /* Enable TIM14 Update interrupt */
  __HAL_TIM_ENABLE_IT(&TimHandle, TIM_IT_UPDATE);
}

/**
  * @brief  Period elapsed callback in non blocking mode
  * @note   This function is called  when TIM14 interrupt took place, inside
  * HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
  * a global variable "uwTick" used as application time base.
  * @param  htim : TIM handle
  * @retval None
  */
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
  HAL_IncTick();
}

/**
  * @brief  This function handles TIM interrupt request.
  * @param  None
  * @retval None
  */
void TIM14_IRQHandler(void)
{
  HAL_TIM_IRQHandler(&TimHandle);
}

/************************ (C) COPYRIGHT Puya *****END OF FILE******************/
