summaryrefslogtreecommitdiff
path: root/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_timebase_tim_template.c
blob: 887a3cde67e8f313164bba722e1cf8d03880353e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
/**
  ******************************************************************************
  * @file    stm32h7xx_hal_timebase_tim_template.c
  * @author  MCD Application Team
  * @brief   HAL time base based on the hardware TIM.
  *
  *          This file overrides the native HAL time base functions (defined as weak)
  *          the TIM time base:
  *           + Initializes the TIM peripheral generate a Period elapsed Event each 1ms
  *           + HAL_IncTick is called inside HAL_TIM_PeriodElapsedCallback ie each 1ms
  *
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2017 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
 @verbatim
  ==============================================================================
                        ##### How to use this driver #####
  ==============================================================================
    [..]
    This file must be copied to the application folder and modified as follows:
    (#) Rename it to 'stm32h7xx_hal_timebase_tim.c'
    (#) Add this file and the TIM HAL drivers to your project and uncomment
       HAL_TIM_MODULE_ENABLED define in stm32h7xx_hal_conf.h

  @endverbatim
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32h7xx_hal.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static TIM_HandleTypeDef        TimHandle;
/* Private function prototypes -----------------------------------------------*/
void TIM6_DAC_IRQHandler(void);
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  This function configures the TIM6 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;
  uint32_t              uwTimclock, uwAPB1Prescaler;
  uint32_t              uwPrescalerValue;
  uint32_t              pFLatency;
  HAL_StatusTypeDef     status;

  /* Enable TIM6 clock */
  __HAL_RCC_TIM6_CLK_ENABLE();

  /* Get clock configuration */
  HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);

  /* Get APB1 prescaler */
  uwAPB1Prescaler = clkconfig.APB1CLKDivider;

  /* Compute TIM6 clock */
  if (uwAPB1Prescaler == RCC_HCLK_DIV1)
  {
    uwTimclock = HAL_RCC_GetPCLK1Freq();
  }
  else
  {
    uwTimclock = 2UL * HAL_RCC_GetPCLK1Freq();
  }

  /* Compute the prescaler value to have TIM6 counter clock equal to 1MHz */
  uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000U) - 1U);

  /* Initialize TIM6 */
  TimHandle.Instance = TIM6;

  /* Initialize TIMx peripheral as follow:
  + Period = [(TIM6CLK/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 = 0U;
  TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
  status = HAL_TIM_Base_Init(&TimHandle);
  if (status == HAL_OK)
  {
    /* Start the TIM time Base generation in interrupt mode */
    status = HAL_TIM_Base_Start_IT(&TimHandle);
    if (status == HAL_OK)
    {
	  /* Enable the TIM6 global Interrupt */
      HAL_NVIC_EnableIRQ(TIM6_DAC_IRQn);
   
      if (TickPriority < (1UL << __NVIC_PRIO_BITS))
      {
        /* Enable the TIM6 global Interrupt */
        HAL_NVIC_SetPriority(TIM6_DAC_IRQn, TickPriority, 0);
        uwTickPrio = TickPriority;
      }
      else
      {
        status = HAL_ERROR;
      }
   }
}

  /* Return function status */
  return status;
}

/**
  * @brief  Suspend Tick increment.
  * @note   Disable the tick increment by disabling TIM6 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_SuspendTick(void)
{
  /* Disable TIM6 update Interrupt */
  __HAL_TIM_DISABLE_IT(&TimHandle, TIM_IT_UPDATE);
}

/**
  * @brief  Resume Tick increment.
  * @note   Enable the tick increment by Enabling TIM6 update interrupt.
  * @param  None
  * @retval None
  */
void HAL_ResumeTick(void)
{
  /* Enable TIM6 Update interrupt */
  __HAL_TIM_ENABLE_IT(&TimHandle, TIM_IT_UPDATE);
}

/**
  * @brief  Period elapsed callback in non blocking mode
  * @note   This function is called  when TIM6 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)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(htim);

  HAL_IncTick();
}

/**
  * @brief  This function handles TIM interrupt request.
  * @param  None
  * @retval None
  */
void TIM6_DAC_IRQHandler(void)
{
  HAL_TIM_IRQHandler(&TimHandle);
}