Gan likun / mbed-dev11

targets/TARGET_STM/hal_tick_32b.c@0:06036f8bee2d, 2022-10-24 (annotated)

Committer:
ganlikun
Date:
Mon Oct 24 15:19:39 2022 +0000
Revision:
0:06036f8bee2d
11

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ganlikun 0:06036f8bee2d 1 /* mbed Microcontroller Library
ganlikun 0:06036f8bee2d 2 * Copyright (c) 2006-2016 ARM Limited
ganlikun 0:06036f8bee2d 3 *
ganlikun 0:06036f8bee2d 4 * Licensed under the Apache License, Version 2.0 (the "License");
ganlikun 0:06036f8bee2d 5 * you may not use this file except in compliance with the License.
ganlikun 0:06036f8bee2d 6 * You may obtain a copy of the License at
ganlikun 0:06036f8bee2d 7 *
ganlikun 0:06036f8bee2d 8 * http://www.apache.org/licenses/LICENSE-2.0
ganlikun 0:06036f8bee2d 9 *
ganlikun 0:06036f8bee2d 10 * Unless required by applicable law or agreed to in writing, software
ganlikun 0:06036f8bee2d 11 * distributed under the License is distributed on an "AS IS" BASIS,
ganlikun 0:06036f8bee2d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ganlikun 0:06036f8bee2d 13 * See the License for the specific language governing permissions and
ganlikun 0:06036f8bee2d 14 * limitations under the License.
ganlikun 0:06036f8bee2d 15 */
ganlikun 0:06036f8bee2d 16 #include "hal_tick.h"
ganlikun 0:06036f8bee2d 17
ganlikun 0:06036f8bee2d 18 // A 32-bit timer is used
ganlikun 0:06036f8bee2d 19 #if !TIM_MST_16BIT
ganlikun 0:06036f8bee2d 20
ganlikun 0:06036f8bee2d 21 #define DEBUG_TICK 0 // Set to 1 to toggle a pin (see below which pin) at each tick
ganlikun 0:06036f8bee2d 22
ganlikun 0:06036f8bee2d 23 extern TIM_HandleTypeDef TimMasterHandle;
ganlikun 0:06036f8bee2d 24
ganlikun 0:06036f8bee2d 25 extern void HAL_IncTick(void);
ganlikun 0:06036f8bee2d 26
ganlikun 0:06036f8bee2d 27 volatile uint32_t PreviousVal = 0;
ganlikun 0:06036f8bee2d 28
ganlikun 0:06036f8bee2d 29 void us_ticker_irq_handler(void);
ganlikun 0:06036f8bee2d 30
ganlikun 0:06036f8bee2d 31 void timer_irq_handler(void)
ganlikun 0:06036f8bee2d 32 {
ganlikun 0:06036f8bee2d 33 // Channel 1 for mbed timeout
ganlikun 0:06036f8bee2d 34 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
ganlikun 0:06036f8bee2d 35 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC1) == SET) {
ganlikun 0:06036f8bee2d 36 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
ganlikun 0:06036f8bee2d 37 us_ticker_irq_handler();
ganlikun 0:06036f8bee2d 38 }
ganlikun 0:06036f8bee2d 39 }
ganlikun 0:06036f8bee2d 40
ganlikun 0:06036f8bee2d 41 // Channel 2 for HAL tick
ganlikun 0:06036f8bee2d 42 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC2) == SET) {
ganlikun 0:06036f8bee2d 43 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC2) == SET) {
ganlikun 0:06036f8bee2d 44 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
ganlikun 0:06036f8bee2d 45 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
ganlikun 0:06036f8bee2d 46 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
ganlikun 0:06036f8bee2d 47 // Increment HAL variable
ganlikun 0:06036f8bee2d 48 HAL_IncTick();
ganlikun 0:06036f8bee2d 49 // Prepare next interrupt
ganlikun 0:06036f8bee2d 50 __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
ganlikun 0:06036f8bee2d 51 PreviousVal = val;
ganlikun 0:06036f8bee2d 52 #if DEBUG_TICK > 0
ganlikun 0:06036f8bee2d 53 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
ganlikun 0:06036f8bee2d 54 #endif
ganlikun 0:06036f8bee2d 55 }
ganlikun 0:06036f8bee2d 56 }
ganlikun 0:06036f8bee2d 57 }
ganlikun 0:06036f8bee2d 58 }
ganlikun 0:06036f8bee2d 59
ganlikun 0:06036f8bee2d 60 // Reconfigure the HAL tick using a standard timer instead of systick.
ganlikun 0:06036f8bee2d 61 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
ganlikun 0:06036f8bee2d 62 {
ganlikun 0:06036f8bee2d 63 RCC_ClkInitTypeDef RCC_ClkInitStruct;
ganlikun 0:06036f8bee2d 64 uint32_t PclkFreq;
ganlikun 0:06036f8bee2d 65
ganlikun 0:06036f8bee2d 66 // Get clock configuration
ganlikun 0:06036f8bee2d 67 // Note: PclkFreq contains here the Latency (not used after)
ganlikun 0:06036f8bee2d 68 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
ganlikun 0:06036f8bee2d 69
ganlikun 0:06036f8bee2d 70 // Get timer clock value
ganlikun 0:06036f8bee2d 71 #if TIM_MST_PCLK == 1
ganlikun 0:06036f8bee2d 72 PclkFreq = HAL_RCC_GetPCLK1Freq();
ganlikun 0:06036f8bee2d 73 #else
ganlikun 0:06036f8bee2d 74 PclkFreq = HAL_RCC_GetPCLK2Freq();
ganlikun 0:06036f8bee2d 75 #endif
ganlikun 0:06036f8bee2d 76
ganlikun 0:06036f8bee2d 77 // Enable timer clock
ganlikun 0:06036f8bee2d 78 TIM_MST_RCC;
ganlikun 0:06036f8bee2d 79
ganlikun 0:06036f8bee2d 80 // Reset timer
ganlikun 0:06036f8bee2d 81 TIM_MST_RESET_ON;
ganlikun 0:06036f8bee2d 82 TIM_MST_RESET_OFF;
ganlikun 0:06036f8bee2d 83
ganlikun 0:06036f8bee2d 84 // Configure time base
ganlikun 0:06036f8bee2d 85 TimMasterHandle.Instance = TIM_MST;
ganlikun 0:06036f8bee2d 86 TimMasterHandle.Init.Period = 0xFFFFFFFF;
ganlikun 0:06036f8bee2d 87
ganlikun 0:06036f8bee2d 88 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
ganlikun 0:06036f8bee2d 89 #if TIM_MST_PCLK == 1
ganlikun 0:06036f8bee2d 90 if (RCC_ClkInitStruct.APB1CLKDivider == RCC_HCLK_DIV1) {
ganlikun 0:06036f8bee2d 91 #else
ganlikun 0:06036f8bee2d 92 if (RCC_ClkInitStruct.APB2CLKDivider == RCC_HCLK_DIV1) {
ganlikun 0:06036f8bee2d 93 #endif
ganlikun 0:06036f8bee2d 94 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq) / 1000000) - 1; // 1 us tick
ganlikun 0:06036f8bee2d 95 } else {
ganlikun 0:06036f8bee2d 96 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq * 2) / 1000000) - 1; // 1 us tick
ganlikun 0:06036f8bee2d 97 }
ganlikun 0:06036f8bee2d 98
ganlikun 0:06036f8bee2d 99 TimMasterHandle.Init.ClockDivision = 0;
ganlikun 0:06036f8bee2d 100 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
ganlikun 0:06036f8bee2d 101 #if !TARGET_STM32L1
ganlikun 0:06036f8bee2d 102 TimMasterHandle.Init.RepetitionCounter = 0;
ganlikun 0:06036f8bee2d 103 #endif
ganlikun 0:06036f8bee2d 104 #ifdef TIM_AUTORELOAD_PRELOAD_DISABLE
ganlikun 0:06036f8bee2d 105 TimMasterHandle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
ganlikun 0:06036f8bee2d 106 #endif
ganlikun 0:06036f8bee2d 107 HAL_TIM_OC_Init(&TimMasterHandle);
ganlikun 0:06036f8bee2d 108
ganlikun 0:06036f8bee2d 109 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
ganlikun 0:06036f8bee2d 110 NVIC_EnableIRQ(TIM_MST_IRQ);
ganlikun 0:06036f8bee2d 111
ganlikun 0:06036f8bee2d 112 // Channel 1 for mbed timeout
ganlikun 0:06036f8bee2d 113 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
ganlikun 0:06036f8bee2d 114
ganlikun 0:06036f8bee2d 115 // Channel 2 for HAL tick
ganlikun 0:06036f8bee2d 116 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
ganlikun 0:06036f8bee2d 117 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
ganlikun 0:06036f8bee2d 118 __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
ganlikun 0:06036f8bee2d 119 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
ganlikun 0:06036f8bee2d 120
ganlikun 0:06036f8bee2d 121 // Freeze timer on stop/breakpoint
ganlikun 0:06036f8bee2d 122 // Define the FREEZE_TIMER_ON_DEBUG macro in mbed_app.json for example
ganlikun 0:06036f8bee2d 123 #if !defined(NDEBUG) && defined(FREEZE_TIMER_ON_DEBUG) && defined(TIM_MST_DBGMCU_FREEZE)
ganlikun 0:06036f8bee2d 124 TIM_MST_DBGMCU_FREEZE;
ganlikun 0:06036f8bee2d 125 #endif
ganlikun 0:06036f8bee2d 126
ganlikun 0:06036f8bee2d 127 #if DEBUG_TICK > 0
ganlikun 0:06036f8bee2d 128 __HAL_RCC_GPIOB_CLK_ENABLE();
ganlikun 0:06036f8bee2d 129 GPIO_InitTypeDef GPIO_InitStruct;
ganlikun 0:06036f8bee2d 130 GPIO_InitStruct.Pin = GPIO_PIN_6;
ganlikun 0:06036f8bee2d 131 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
ganlikun 0:06036f8bee2d 132 GPIO_InitStruct.Pull = GPIO_PULLUP;
ganlikun 0:06036f8bee2d 133 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
ganlikun 0:06036f8bee2d 134 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
ganlikun 0:06036f8bee2d 135 #endif
ganlikun 0:06036f8bee2d 136
ganlikun 0:06036f8bee2d 137 return HAL_OK;
ganlikun 0:06036f8bee2d 138 }
ganlikun 0:06036f8bee2d 139
ganlikun 0:06036f8bee2d 140 /* NOTE: must be called with interrupts disabled! */
ganlikun 0:06036f8bee2d 141 void HAL_SuspendTick(void)
ganlikun 0:06036f8bee2d 142 {
ganlikun 0:06036f8bee2d 143 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
ganlikun 0:06036f8bee2d 144 }
ganlikun 0:06036f8bee2d 145
ganlikun 0:06036f8bee2d 146 /* NOTE: must be called with interrupts disabled! */
ganlikun 0:06036f8bee2d 147 void HAL_ResumeTick(void)
ganlikun 0:06036f8bee2d 148 {
ganlikun 0:06036f8bee2d 149 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
ganlikun 0:06036f8bee2d 150 }
ganlikun 0:06036f8bee2d 151
ganlikun 0:06036f8bee2d 152 #endif // !TIM_MST_16BIT
ganlikun 0:06036f8bee2d 153