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| 1 | +/** |
| 2 | + ****************************************************************************** |
| 3 | + * @file hal_tick.c |
| 4 | + * @author MCD Application Team |
| 5 | + * @brief Initialization of HAL tick |
| 6 | + ****************************************************************************** |
| 7 | + * @attention |
| 8 | + * |
| 9 | + * <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2> |
| 10 | + * |
| 11 | + * Redistribution and use in source and binary forms, with or without modification, |
| 12 | + * are permitted provided that the following conditions are met: |
| 13 | + * 1. Redistributions of source code must retain the above copyright notice, |
| 14 | + * this list of conditions and the following disclaimer. |
| 15 | + * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 16 | + * this list of conditions and the following disclaimer in the documentation |
| 17 | + * and/or other materials provided with the distribution. |
| 18 | + * 3. Neither the name of STMicroelectronics nor the names of its contributors |
| 19 | + * may be used to endorse or promote products derived from this software |
| 20 | + * without specific prior written permission. |
| 21 | + * |
| 22 | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 23 | + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 25 | + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| 26 | + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 28 | + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| 29 | + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 30 | + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 31 | + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 32 | + * |
| 33 | + ****************************************************************************** |
| 34 | + */ |
| 35 | +#include "hal_tick.h" |
| 36 | + |
| 37 | +TIM_HandleTypeDef TimMasterHandle; |
| 38 | +uint32_t PreviousVal = 0; |
| 39 | + |
| 40 | +void us_ticker_irq_handler(void); |
| 41 | + |
| 42 | +void timer_irq_handler(void) { |
| 43 | + // Channel 1 for mbed timeout |
| 44 | + if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) { |
| 45 | + if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC1) == SET) { |
| 46 | + __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1); |
| 47 | + us_ticker_irq_handler(); |
| 48 | + } |
| 49 | + } |
| 50 | + |
| 51 | + // Channel 2 for HAL tick |
| 52 | + if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC2) == SET) { |
| 53 | + if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC2) == SET) { |
| 54 | + __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2); |
| 55 | + uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle); |
| 56 | + if ((val - PreviousVal) >= HAL_TICK_DELAY) { |
| 57 | + // Increment HAL variable |
| 58 | + HAL_IncTick(); |
| 59 | + // Prepare next interrupt |
| 60 | + __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY); |
| 61 | + PreviousVal = val; |
| 62 | +#if 0 // For DEBUG only |
| 63 | + HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6); |
| 64 | +#endif |
| 65 | + } |
| 66 | + } |
| 67 | + } |
| 68 | +} |
| 69 | + |
| 70 | +// Reconfigure the HAL tick using a standard timer instead of systick. |
| 71 | +HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) { |
| 72 | + // Enable timer clock |
| 73 | + TIM_MST_RCC; |
| 74 | + |
| 75 | + // Reset timer |
| 76 | + TIM_MST_RESET_ON; |
| 77 | + TIM_MST_RESET_OFF; |
| 78 | + |
| 79 | + // Update the SystemCoreClock variable |
| 80 | + SystemCoreClockUpdate(); |
| 81 | + |
| 82 | + // Configure time base |
| 83 | + TimMasterHandle.Instance = TIM_MST; |
| 84 | + TimMasterHandle.Init.Period = 0xFFFFFFFF; |
| 85 | + TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick |
| 86 | + TimMasterHandle.Init.ClockDivision = 0; |
| 87 | + TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP; |
| 88 | + TimMasterHandle.Init.RepetitionCounter = 0; |
| 89 | + HAL_TIM_OC_Init(&TimMasterHandle); |
| 90 | + |
| 91 | + NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler); |
| 92 | + NVIC_EnableIRQ(TIM_MST_IRQ); |
| 93 | + |
| 94 | + // Channel 1 for mbed timeout |
| 95 | + HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1); |
| 96 | + |
| 97 | + // Channel 2 for HAL tick |
| 98 | + HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2); |
| 99 | + PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle); |
| 100 | + __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY); |
| 101 | + __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2); |
| 102 | + |
| 103 | +#if 0 // For DEBUG only |
| 104 | + __GPIOB_CLK_ENABLE(); |
| 105 | + GPIO_InitTypeDef GPIO_InitStruct; |
| 106 | + GPIO_InitStruct.Pin = GPIO_PIN_6; |
| 107 | + GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; |
| 108 | + GPIO_InitStruct.Pull = GPIO_PULLUP; |
| 109 | + GPIO_InitStruct.Speed = GPIO_SPEED_FAST; |
| 110 | + HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); |
| 111 | +#endif |
| 112 | + |
| 113 | + return HAL_OK; |
| 114 | +} |
| 115 | + |
| 116 | +void HAL_SuspendTick(void) |
| 117 | +{ |
| 118 | + TimMasterHandle.Instance = TIM_MST; |
| 119 | + |
| 120 | + // Disable HAL tick and us_ticker update interrupts (used for 32 bit counter) |
| 121 | + __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2); |
| 122 | +} |
| 123 | + |
| 124 | +void HAL_ResumeTick(void) |
| 125 | +{ |
| 126 | + TimMasterHandle.Instance = TIM_MST; |
| 127 | + |
| 128 | + // Enable HAL tick and us_ticker update interrupts (used for 32 bit counter) |
| 129 | + __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2); |
| 130 | +} |
| 131 | +/** |
| 132 | + * @} |
| 133 | + */ |
| 134 | + |
| 135 | +/** |
| 136 | + * @} |
| 137 | + */ |
| 138 | + |
| 139 | +/** |
| 140 | + * @} |
| 141 | + */ |
| 142 | +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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