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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F0/TARGET_NUCLEO_F030R8/hal_tick.c@583:967d0d8b7aed, 2015-07-06 (annotated)

Committer:
mbed_official
Date:
Mon Jul 06 09:15:09 2015 +0100
Revision:
583:967d0d8b7aed
Synchronized with git revision 0a7df4e114501712e80882fb66c8a1e1ffca2dcb



Full URL: https://github.com/mbedmicro/mbed/commit/0a7df4e114501712e80882fb66c8a1e1ffca2dcb/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 583:967d0d8b7aed 1 /**
mbed_official 583:967d0d8b7aed 2 ******************************************************************************
mbed_official 583:967d0d8b7aed 3 * @file hal_tick.c
mbed_official 583:967d0d8b7aed 4 * @author MCD Application Team
mbed_official 583:967d0d8b7aed 5 * @brief Initialization of HAL tick
mbed_official 583:967d0d8b7aed 6 ******************************************************************************
mbed_official 583:967d0d8b7aed 7 * @attention
mbed_official 583:967d0d8b7aed 8 *
mbed_official 583:967d0d8b7aed 9 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 583:967d0d8b7aed 10 *
mbed_official 583:967d0d8b7aed 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 583:967d0d8b7aed 12 * are permitted provided that the following conditions are met:
mbed_official 583:967d0d8b7aed 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 583:967d0d8b7aed 14 * this list of conditions and the following disclaimer.
mbed_official 583:967d0d8b7aed 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 583:967d0d8b7aed 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 583:967d0d8b7aed 17 * and/or other materials provided with the distribution.
mbed_official 583:967d0d8b7aed 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 583:967d0d8b7aed 19 * may be used to endorse or promote products derived from this software
mbed_official 583:967d0d8b7aed 20 * without specific prior written permission.
mbed_official 583:967d0d8b7aed 21 *
mbed_official 583:967d0d8b7aed 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 583:967d0d8b7aed 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 583:967d0d8b7aed 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 583:967d0d8b7aed 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 583:967d0d8b7aed 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 583:967d0d8b7aed 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 583:967d0d8b7aed 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 583:967d0d8b7aed 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 583:967d0d8b7aed 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 583:967d0d8b7aed 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 583:967d0d8b7aed 32 *
mbed_official 583:967d0d8b7aed 33 ******************************************************************************
mbed_official 583:967d0d8b7aed 34 */
mbed_official 583:967d0d8b7aed 35 #include "hal_tick.h"
mbed_official 583:967d0d8b7aed 36
mbed_official 583:967d0d8b7aed 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 583:967d0d8b7aed 38 uint32_t PreviousVal = 0;
mbed_official 583:967d0d8b7aed 39
mbed_official 583:967d0d8b7aed 40 void us_ticker_irq_handler(void);
mbed_official 583:967d0d8b7aed 41 void set_compare(uint16_t count);
mbed_official 583:967d0d8b7aed 42
mbed_official 583:967d0d8b7aed 43 extern volatile uint32_t SlaveCounter;
mbed_official 583:967d0d8b7aed 44 extern volatile uint32_t oc_int_part;
mbed_official 583:967d0d8b7aed 45 extern volatile uint16_t oc_rem_part;
mbed_official 583:967d0d8b7aed 46
mbed_official 583:967d0d8b7aed 47 // Used to increment the slave counter
mbed_official 583:967d0d8b7aed 48 void timer_update_irq_handler(void)
mbed_official 583:967d0d8b7aed 49 {
mbed_official 583:967d0d8b7aed 50 TimMasterHandle.Instance = TIM_MST;
mbed_official 583:967d0d8b7aed 51
mbed_official 583:967d0d8b7aed 52 // Clear Update interrupt flag
mbed_official 583:967d0d8b7aed 53 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE) == SET) {
mbed_official 583:967d0d8b7aed 54 __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE);
mbed_official 583:967d0d8b7aed 55 SlaveCounter++;
mbed_official 583:967d0d8b7aed 56 }
mbed_official 583:967d0d8b7aed 57 }
mbed_official 583:967d0d8b7aed 58
mbed_official 583:967d0d8b7aed 59 // Used for mbed timeout (channel 1) and HAL tick (channel 2)
mbed_official 583:967d0d8b7aed 60 void timer_oc_irq_handler(void)
mbed_official 583:967d0d8b7aed 61 {
mbed_official 583:967d0d8b7aed 62 uint16_t cval = TIM_MST->CNT;
mbed_official 583:967d0d8b7aed 63 TimMasterHandle.Instance = TIM_MST;
mbed_official 583:967d0d8b7aed 64
mbed_official 583:967d0d8b7aed 65 // Channel 1 for mbed timeout
mbed_official 583:967d0d8b7aed 66 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
mbed_official 583:967d0d8b7aed 67 __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC1);
mbed_official 583:967d0d8b7aed 68 if (oc_rem_part > 0) {
mbed_official 583:967d0d8b7aed 69 set_compare(oc_rem_part); // Finish the remaining time left
mbed_official 583:967d0d8b7aed 70 oc_rem_part = 0;
mbed_official 583:967d0d8b7aed 71 } else {
mbed_official 583:967d0d8b7aed 72 if (oc_int_part > 0) {
mbed_official 583:967d0d8b7aed 73 set_compare(0xFFFF);
mbed_official 583:967d0d8b7aed 74 oc_rem_part = cval; // To finish the counter loop the next time
mbed_official 583:967d0d8b7aed 75 oc_int_part--;
mbed_official 583:967d0d8b7aed 76 } else {
mbed_official 583:967d0d8b7aed 77 us_ticker_irq_handler();
mbed_official 583:967d0d8b7aed 78 }
mbed_official 583:967d0d8b7aed 79 }
mbed_official 583:967d0d8b7aed 80 }
mbed_official 583:967d0d8b7aed 81
mbed_official 583:967d0d8b7aed 82 // Channel 2 for HAL tick
mbed_official 583:967d0d8b7aed 83 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC2) == SET) {
mbed_official 583:967d0d8b7aed 84 __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC2);
mbed_official 583:967d0d8b7aed 85 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 583:967d0d8b7aed 86 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 583:967d0d8b7aed 87 // Increment HAL variable
mbed_official 583:967d0d8b7aed 88 HAL_IncTick();
mbed_official 583:967d0d8b7aed 89 // Prepare next interrupt
mbed_official 583:967d0d8b7aed 90 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 583:967d0d8b7aed 91 PreviousVal = val;
mbed_official 583:967d0d8b7aed 92 }
mbed_official 583:967d0d8b7aed 93 }
mbed_official 583:967d0d8b7aed 94 }
mbed_official 583:967d0d8b7aed 95
mbed_official 583:967d0d8b7aed 96 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 583:967d0d8b7aed 97 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 583:967d0d8b7aed 98
mbed_official 583:967d0d8b7aed 99 static uint32_t ticker_inited=0;
mbed_official 583:967d0d8b7aed 100 if(ticker_inited)return HAL_OK;
mbed_official 583:967d0d8b7aed 101 ticker_inited=1;
mbed_official 583:967d0d8b7aed 102
mbed_official 583:967d0d8b7aed 103 // Enable timer clock
mbed_official 583:967d0d8b7aed 104 TIM_MST_RCC;
mbed_official 583:967d0d8b7aed 105
mbed_official 583:967d0d8b7aed 106 // Reset timer
mbed_official 583:967d0d8b7aed 107 TIM_MST_RESET_ON;
mbed_official 583:967d0d8b7aed 108 TIM_MST_RESET_OFF;
mbed_official 583:967d0d8b7aed 109
mbed_official 583:967d0d8b7aed 110 // Update the SystemCoreClock variable
mbed_official 583:967d0d8b7aed 111 SystemCoreClockUpdate();
mbed_official 583:967d0d8b7aed 112
mbed_official 583:967d0d8b7aed 113 // Configure time base
mbed_official 583:967d0d8b7aed 114 TimMasterHandle.Instance = TIM_MST;
mbed_official 583:967d0d8b7aed 115 TimMasterHandle.Init.Period = 0xFFFF;
mbed_official 583:967d0d8b7aed 116 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 583:967d0d8b7aed 117 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 583:967d0d8b7aed 118 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 583:967d0d8b7aed 119 HAL_TIM_Base_Init(&TimMasterHandle);
mbed_official 583:967d0d8b7aed 120
mbed_official 583:967d0d8b7aed 121 // Configure output compare channel 1 for mbed timeout (enabled later when used)
mbed_official 583:967d0d8b7aed 122 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 583:967d0d8b7aed 123
mbed_official 583:967d0d8b7aed 124 // Configure output compare channel 2 for HAL tick
mbed_official 583:967d0d8b7aed 125 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 583:967d0d8b7aed 126 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 583:967d0d8b7aed 127 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 583:967d0d8b7aed 128
mbed_official 583:967d0d8b7aed 129 // Configure interrupts
mbed_official 583:967d0d8b7aed 130 // Update interrupt used for 32-bit counter
mbed_official 583:967d0d8b7aed 131 // Output compare channel 1 interrupt for mbed timeout
mbed_official 583:967d0d8b7aed 132 // Output compare channel 2 interrupt for HAL tick
mbed_official 583:967d0d8b7aed 133 NVIC_SetVector(TIM_MST_UP_IRQ, (uint32_t)timer_update_irq_handler);
mbed_official 583:967d0d8b7aed 134 NVIC_EnableIRQ(TIM_MST_UP_IRQ);
mbed_official 583:967d0d8b7aed 135 NVIC_SetVector(TIM_MST_OC_IRQ, (uint32_t)timer_oc_irq_handler);
mbed_official 583:967d0d8b7aed 136 NVIC_EnableIRQ(TIM_MST_OC_IRQ);
mbed_official 583:967d0d8b7aed 137
mbed_official 583:967d0d8b7aed 138 // Enable interrupts
mbed_official 583:967d0d8b7aed 139 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_UPDATE); // For 32-bit counter
mbed_official 583:967d0d8b7aed 140 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2); // For HAL tick
mbed_official 583:967d0d8b7aed 141
mbed_official 583:967d0d8b7aed 142 // Enable timer
mbed_official 583:967d0d8b7aed 143 HAL_TIM_Base_Start(&TimMasterHandle);
mbed_official 583:967d0d8b7aed 144
mbed_official 583:967d0d8b7aed 145 return HAL_OK;
mbed_official 583:967d0d8b7aed 146 }
mbed_official 583:967d0d8b7aed 147
mbed_official 583:967d0d8b7aed 148 /**
mbed_official 583:967d0d8b7aed 149 * @}
mbed_official 583:967d0d8b7aed 150 */
mbed_official 583:967d0d8b7aed 151
mbed_official 583:967d0d8b7aed 152 /**
mbed_official 583:967d0d8b7aed 153 * @}
mbed_official 583:967d0d8b7aed 154 */
mbed_official 583:967d0d8b7aed 155
mbed_official 583:967d0d8b7aed 156 /**
mbed_official 583:967d0d8b7aed 157 * @}
mbed_official 583:967d0d8b7aed 158 */
mbed_official 583:967d0d8b7aed 159 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/