1 /**
2 ******************************************************************************
3 * @file stm32wbxx_hal_timebase_tim_template.c
4 * @author MCD Application Team
5 * @brief HAL time base based on the hardware TIM Template.
6 *
7 * This file overrides the native HAL time base functions (defined as weak)
8 * the TIM time base:
9 * + Initializes the TIM peripheral generate a Period elapsed Event each 1ms
10 * when uwTickFreq is set to default value, else 10 ms or
11 * 100 ms, depending of above global variable value.
12 * + HAL_IncTick is called inside HAL_TIM_PeriodElapsedCallback
13 *
14 ******************************************************************************
15 * @attention
16 *
17 * Copyright (c) 2019 STMicroelectronics.
18 * All rights reserved.
19 *
20 * This software is licensed under terms that can be found in the LICENSE file
21 * in the root directory of this software component.
22 * If no LICENSE file comes with this software, it is provided AS-IS.
23 *
24 ******************************************************************************
25 @verbatim
26 ==============================================================================
27 ##### How to use this driver #####
28 ==============================================================================
29 [..]
30 This file must be copied to the application folder and modified as follows:
31 (#) Rename it to 'stm32wlxx_hal_timebase_tim.c'
32 (#) Add this file and the TIM HAL drivers to your project and uncomment
33 HAL_TIM_MODULE_ENABLED define in stm32wlxx_hal_conf.h
34
35 @endverbatim
36 */
37
38 /* Includes ------------------------------------------------------------------*/
39 #include "stm32wbxx_hal.h"
40
41 /** @addtogroup STM32WBxx_HAL_Driver
42 * @{
43 */
44
45 /** @addtogroup HAL_TimeBase_TIM
46 * @{
47 */
48
49 /* Private typedef -----------------------------------------------------------*/
50 /* Private define ------------------------------------------------------------*/
51 /* Private macro -------------------------------------------------------------*/
52 /* Private variables ---------------------------------------------------------*/
53 extern TIM_HandleTypeDef TimHandle;
54 TIM_HandleTypeDef TimHandle;
55
56 /* Private function prototypes -----------------------------------------------*/
57 void TIM2_IRQHandler(void);
58 /* Private functions ---------------------------------------------------------*/
59
60 /**
61 * @brief This function configures the TIM2 as a time base source.
62 * The time source is configured to have 1ms time base with a dedicated
63 * Tick interrupt priority.
64 * @note This function is called automatically at the beginning of program after
65 * reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig().
66 * @param TickPriority Tick interrupt priority.
67 * @retval HAL status
68 */
HAL_InitTick(uint32_t TickPriority)69 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
70 {
71 RCC_ClkInitTypeDef clkconfig;
72 uint32_t uwTimclock;
73 uint32_t uwAPB1Prescaler;
74 uint32_t uwPrescalerValue;
75 uint32_t pFLatency;
76 HAL_StatusTypeDef status = HAL_OK;
77
78 /* Check uwTickFreq for MisraC 2012 (even if uwTickFreq is a enum type that don't take the value zero)*/
79 if ((uint32_t)uwTickFreq != 0U)
80 {
81 /* Enable TIM2 clock */
82 __HAL_RCC_TIM2_CLK_ENABLE();
83
84 /* Get clock configuration */
85 HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
86
87 /* Get APB1 prescaler */
88 uwAPB1Prescaler = clkconfig.APB1CLKDivider;
89
90 /* Compute TIM2 clock */
91 if (uwAPB1Prescaler == RCC_HCLK_DIV1)
92 {
93 uwTimclock = HAL_RCC_GetPCLK1Freq();
94 }
95 else
96 {
97 uwTimclock = 2*HAL_RCC_GetPCLK1Freq();
98 }
99
100 /* Compute the prescaler value to have TIM2 counter clock equal to 1MHz */
101 uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000U) - 1U);
102
103 /* Initialize TIM2 */
104 TimHandle.Instance = TIM2;
105
106 /* Initialize TIMx peripheral as follow:
107 + Period = [(TIM2CLK/uwTickFreq) - 1]. to have a (1/uwTickFreq) s time base.
108 + Prescaler = (uwTimclock/1000000 - 1) to have a 1MHz counter clock.
109 + ClockDivision = 0
110 + Counter direction = Up
111 */
112 TimHandle.Init.Period = (1000000U / (1000U / (uint32_t)uwTickFreq)) - 1U;
113 TimHandle.Init.Prescaler = uwPrescalerValue;
114 TimHandle.Init.ClockDivision = 0U;
115 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
116 TimHandle.Init.RepetitionCounter = 0U;
117 if (HAL_TIM_Base_Init(&TimHandle) == HAL_OK)
118 {
119 /* Start the TIM time Base generation in interrupt mode */
120 if (HAL_TIM_Base_Start_IT(&TimHandle) == HAL_OK)
121 {
122 /* Enable the TIM2 global Interrupt */
123 HAL_NVIC_EnableIRQ(TIM2_IRQn);
124
125 /* Configure the SysTick IRQ priority */
126 if (TickPriority < (1UL << __NVIC_PRIO_BITS))
127 {
128 /*Configure the TIM2 IRQ priority */
129 HAL_NVIC_SetPriority(TIM2_IRQn, TickPriority ,0U);
130 uwTickPrio = TickPriority;
131 }
132 else
133 {
134 status = HAL_ERROR;
135 }
136 }
137 else
138 {
139 status = HAL_ERROR;
140 }
141 }
142 else
143 {
144 status = HAL_ERROR;
145 }
146 }
147 else
148 {
149 status = HAL_ERROR;
150 }
151
152 /* Return function status */
153 return status;
154 }
155
156 /**
157 * @brief Suspend Tick increment.
158 * @note Disable the tick increment by disabling TIM2 update interrupt.
159 * @retval None
160 */
HAL_SuspendTick(void)161 void HAL_SuspendTick(void)
162 {
163 /* Disable TIM2 update Interrupt */
164 __HAL_TIM_DISABLE_IT(&TimHandle, TIM_IT_UPDATE);
165 }
166
167 /**
168 * @brief Resume Tick increment.
169 * @note Enable the tick increment by Enabling TIM2 update interrupt.
170 * @retval None
171 */
HAL_ResumeTick(void)172 void HAL_ResumeTick(void)
173 {
174 /* Enable TIM2 Update interrupt */
175 __HAL_TIM_ENABLE_IT(&TimHandle, TIM_IT_UPDATE);
176 }
177
178 /**
179 * @brief Period elapsed callback in non blocking mode
180 * @note This function is called when TIM2 interrupt took place, inside
181 * HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
182 * a global variable "uwTick" used as application time base.
183 * @param htim : TIM handle
184 * @retval None
185 */
HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef * htim)186 void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
187 {
188 HAL_IncTick();
189 }
190
191 /**
192 * @brief This function handles TIM interrupt request.
193 * @retval None
194 */
TIM2_IRQHandler(void)195 void TIM2_IRQHandler(void)
196 {
197 HAL_TIM_IRQHandler(&TimHandle);
198 }
199
200 /**
201 * @}
202 */
203
204 /**
205 * @}
206 */
207
