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comparison l476rg/Src/stm32l4xx_hal_timebase_TIM.c @ 0:32a3b1785697

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a rough draft of Hardware Abstraction Layer for C++ STM32L476RG drivers
author cin
date Thu, 12 Jan 2017 02:45:43 +0300
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children ca4f5b55b391
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-1:000000000000 0:32a3b1785697
1 /**
2 ******************************************************************************
3 * @file stm32l4xx_hal_timebase_TIM.c
4 * @brief HAL time base based on the hardware TIM.
5 ******************************************************************************
6 *
7 * COPYRIGHT(c) 2017 STMicroelectronics
8 *
9 * Redistribution and use in source and binary forms, with or without modification,
10 * are permitted provided that the following conditions are met:
11 * 1. Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 * 3. Neither the name of STMicroelectronics nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
23 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
26 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
27 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 ******************************************************************************
32 */
33
34 /* Includes ------------------------------------------------------------------*/
35 #include "stm32l4xx_hal.h"
36 #include "stm32l4xx_hal_tim.h"
37 /** @addtogroup STM32F7xx_HAL_Examples
38 * @{
39 */
40
41 /** @addtogroup HAL_TimeBase
42 * @{
43 */
44
45 /* Private typedef -----------------------------------------------------------*/
46 /* Private define ------------------------------------------------------------*/
47 /* Private macro -------------------------------------------------------------*/
48 /* Private variables ---------------------------------------------------------*/
49 TIM_HandleTypeDef htim6;
50 uint32_t uwIncrementState = 0;
51 /* Private function prototypes -----------------------------------------------*/
52 /* Private functions ---------------------------------------------------------*/
53
54 /**
55 * @brief This function configures the TIM6 as a time base source.
56 * The time source is configured to have 1ms time base with a dedicated
57 * Tick interrupt priority.
58 * @note This function is called automatically at the beginning of program after
59 * reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig().
60 * @param TickPriority: Tick interrupt priorty.
61 * @retval HAL status
62 */
63 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
64 {
65 RCC_ClkInitTypeDef clkconfig;
66 uint32_t uwTimclock = 0;
67 uint32_t uwPrescalerValue = 0;
68 uint32_t pFLatency;
69
70 /*Configure the TIM6 IRQ priority */
71 HAL_NVIC_SetPriority(TIM6_DAC_IRQn, TickPriority ,0);
72
73 /* Enable the TIM6 global Interrupt */
74 HAL_NVIC_EnableIRQ(TIM6_DAC_IRQn);
75
76 /* Enable TIM6 clock */
77 __HAL_RCC_TIM6_CLK_ENABLE();
78
79 /* Get clock configuration */
80 HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
81
82 /* Compute TIM6 clock */
83 uwTimclock = HAL_RCC_GetPCLK1Freq();
84
85 /* Compute the prescaler value to have TIM6 counter clock equal to 1MHz */
86 uwPrescalerValue = (uint32_t) ((uwTimclock / 1000000) - 1);
87
88 /* Initialize TIM6 */
89 htim6.Instance = TIM6;
90
91 /* Initialize TIMx peripheral as follow:
92 + Period = [(TIM6CLK/1000) - 1]. to have a (1/1000) s time base.
93 + Prescaler = (uwTimclock/1000000 - 1) to have a 1MHz counter clock.
94 + ClockDivision = 0
95 + Counter direction = Up
96 */
97 htim6.Init.Period = (1000000 / 1000) - 1;
98 htim6.Init.Prescaler = uwPrescalerValue;
99 htim6.Init.ClockDivision = 0;
100 htim6.Init.CounterMode = TIM_COUNTERMODE_UP;
101 if(HAL_TIM_Base_Init(&htim6) == HAL_OK)
102 {
103 /* Start the TIM time Base generation in interrupt mode */
104 return HAL_TIM_Base_Start_IT(&htim6);
105 }
106
107 /* Return function status */
108 return HAL_ERROR;
109 }
110
111 /**
112 * @brief Suspend Tick increment.
113 * @note Disable the tick increment by disabling TIM6 update interrupt.
114 * @param None
115 * @retval None
116 */
117 void HAL_SuspendTick(void)
118 {
119 /* Disable TIM6 update Interrupt */
120 __HAL_TIM_DISABLE_IT(&htim6, TIM_IT_UPDATE);
121 }
122
123 /**
124 * @brief Resume Tick increment.
125 * @note Enable the tick increment by Enabling TIM6 update interrupt.
126 * @param None
127 * @retval None
128 */
129 void HAL_ResumeTick(void)
130 {
131 /* Enable TIM6 Update interrupt */
132 __HAL_TIM_ENABLE_IT(&htim6, TIM_IT_UPDATE);
133 }
134
135 /**
136 * @}
137 */
138
139 /**
140 * @}
141 */
142
143 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/