Marco Mayer / Mbed OS Queue

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mbed-os/targets/TARGET_STM/hal_tick_16b.c@2:c7897a3f5f11, 2020-04-22 (annotated)

Committer:
demayer
Date:
Wed Apr 22 11:50:00 2020 +0000
Revision:
2:c7897a3f5f11
Parent:
0:6bf0743ece18 
test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
demayer 0:6bf0743ece18 1 /* mbed Microcontroller Library
demayer 0:6bf0743ece18 2 * Copyright (c) 2006-2016 ARM Limited
demayer 0:6bf0743ece18 3 *
demayer 0:6bf0743ece18 4 * Licensed under the Apache License, Version 2.0 (the "License");
demayer 0:6bf0743ece18 5 * you may not use this file except in compliance with the License.
demayer 0:6bf0743ece18 6 * You may obtain a copy of the License at
demayer 0:6bf0743ece18 7 *
demayer 0:6bf0743ece18 8 * http://www.apache.org/licenses/LICENSE-2.0
demayer 0:6bf0743ece18 9 *
demayer 0:6bf0743ece18 10 * Unless required by applicable law or agreed to in writing, software
demayer 0:6bf0743ece18 11 * distributed under the License is distributed on an "AS IS" BASIS,
demayer 0:6bf0743ece18 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
demayer 0:6bf0743ece18 13 * See the License for the specific language governing permissions and
demayer 0:6bf0743ece18 14 * limitations under the License.
demayer 0:6bf0743ece18 15 */
demayer 0:6bf0743ece18 16 #include "hal_tick.h"
demayer 0:6bf0743ece18 17
demayer 0:6bf0743ece18 18 // A 16-bit timer is used
demayer 0:6bf0743ece18 19 #if TIM_MST_16BIT
demayer 0:6bf0743ece18 20
demayer 0:6bf0743ece18 21 #define DEBUG_TICK 0 // Set to 1 to toggle a pin (see below which pin) at each tick
demayer 0:6bf0743ece18 22
demayer 0:6bf0743ece18 23 extern TIM_HandleTypeDef TimMasterHandle;
demayer 0:6bf0743ece18 24
demayer 0:6bf0743ece18 25 extern volatile uint32_t SlaveCounter;
demayer 0:6bf0743ece18 26 extern volatile uint32_t oc_int_part;
demayer 0:6bf0743ece18 27
demayer 0:6bf0743ece18 28 volatile uint32_t PreviousVal = 0;
demayer 0:6bf0743ece18 29
demayer 0:6bf0743ece18 30 void us_ticker_irq_handler(void);
demayer 0:6bf0743ece18 31
demayer 0:6bf0743ece18 32 #if defined(TARGET_STM32F0)
demayer 0:6bf0743ece18 33 void timer_update_irq_handler(void) {
demayer 0:6bf0743ece18 34 #else
demayer 0:6bf0743ece18 35 void timer_irq_handler(void)
demayer 0:6bf0743ece18 36 {
demayer 0:6bf0743ece18 37 #endif
demayer 0:6bf0743ece18 38 TimMasterHandle.Instance = TIM_MST;
demayer 0:6bf0743ece18 39
demayer 0:6bf0743ece18 40 // Clear Update interrupt flag
demayer 0:6bf0743ece18 41 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE) == SET) {
demayer 0:6bf0743ece18 42 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_UPDATE) == SET) {
demayer 0:6bf0743ece18 43 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_UPDATE);
demayer 0:6bf0743ece18 44 SlaveCounter++;
demayer 0:6bf0743ece18 45 }
demayer 0:6bf0743ece18 46 }
demayer 0:6bf0743ece18 47
demayer 0:6bf0743ece18 48 #if defined(TARGET_STM32F0)
demayer 0:6bf0743ece18 49 } // end timer_update_irq_handler function
demayer 0:6bf0743ece18 50 // Used for mbed timeout (channel 1) and HAL tick (channel 2)
demayer 0:6bf0743ece18 51 void timer_oc_irq_handler(void)
demayer 0:6bf0743ece18 52 {
demayer 0:6bf0743ece18 53 TimMasterHandle.Instance = TIM_MST;
demayer 0:6bf0743ece18 54 #endif
demayer 0:6bf0743ece18 55
demayer 0:6bf0743ece18 56 // Channel 1 for mbed timeout
demayer 0:6bf0743ece18 57 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
demayer 0:6bf0743ece18 58 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC1) == SET) {
demayer 0:6bf0743ece18 59 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
demayer 0:6bf0743ece18 60
demayer 0:6bf0743ece18 61 if (oc_int_part > 0) {
demayer 0:6bf0743ece18 62 oc_int_part--;
demayer 0:6bf0743ece18 63 } else {
demayer 0:6bf0743ece18 64 us_ticker_irq_handler();
demayer 0:6bf0743ece18 65 }
demayer 0:6bf0743ece18 66 }
demayer 0:6bf0743ece18 67 }
demayer 0:6bf0743ece18 68
demayer 0:6bf0743ece18 69 // Channel 2 for HAL tick
demayer 0:6bf0743ece18 70 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC2) == SET) {
demayer 0:6bf0743ece18 71
demayer 0:6bf0743ece18 72 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC2) == SET) {
demayer 0:6bf0743ece18 73 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
demayer 0:6bf0743ece18 74 uint32_t val = __HAL_TIM_GET_COUNTER(&TimMasterHandle);
demayer 0:6bf0743ece18 75 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
demayer 0:6bf0743ece18 76 // Increment HAL variable
demayer 0:6bf0743ece18 77 HAL_IncTick();
demayer 0:6bf0743ece18 78 // Prepare next interrupt
demayer 0:6bf0743ece18 79 __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
demayer 0:6bf0743ece18 80 PreviousVal = val;
demayer 0:6bf0743ece18 81 #if DEBUG_TICK > 0
demayer 0:6bf0743ece18 82 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
demayer 0:6bf0743ece18 83 #endif
demayer 0:6bf0743ece18 84 }
demayer 0:6bf0743ece18 85 }
demayer 0:6bf0743ece18 86 }
demayer 0:6bf0743ece18 87 }
demayer 0:6bf0743ece18 88
demayer 0:6bf0743ece18 89 // Reconfigure the HAL tick using a standard timer instead of systick.
demayer 0:6bf0743ece18 90 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
demayer 0:6bf0743ece18 91 {
demayer 0:6bf0743ece18 92 // Enable timer clock
demayer 0:6bf0743ece18 93 TIM_MST_RCC;
demayer 0:6bf0743ece18 94
demayer 0:6bf0743ece18 95 // Reset timer
demayer 0:6bf0743ece18 96 TIM_MST_RESET_ON;
demayer 0:6bf0743ece18 97 TIM_MST_RESET_OFF;
demayer 0:6bf0743ece18 98
demayer 0:6bf0743ece18 99 // Update the SystemCoreClock variable
demayer 0:6bf0743ece18 100 SystemCoreClockUpdate();
demayer 0:6bf0743ece18 101
demayer 0:6bf0743ece18 102 // Configure time base
demayer 0:6bf0743ece18 103 TimMasterHandle.Instance = TIM_MST;
demayer 0:6bf0743ece18 104 TimMasterHandle.Init.Period = 0xFFFF;
demayer 0:6bf0743ece18 105 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
demayer 0:6bf0743ece18 106 TimMasterHandle.Init.ClockDivision = 0;
demayer 0:6bf0743ece18 107 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
demayer 0:6bf0743ece18 108 #if !defined(TARGET_STM32L0)
demayer 0:6bf0743ece18 109 TimMasterHandle.Init.RepetitionCounter = 0;
demayer 0:6bf0743ece18 110 #endif
demayer 0:6bf0743ece18 111 #ifdef TIM_AUTORELOAD_PRELOAD_DISABLE
demayer 0:6bf0743ece18 112 TimMasterHandle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
demayer 0:6bf0743ece18 113 #endif
demayer 0:6bf0743ece18 114 HAL_TIM_Base_Init(&TimMasterHandle);
demayer 0:6bf0743ece18 115
demayer 0:6bf0743ece18 116 //LL_TIM_EnableUpdateEvent(TimMasterHandle.Instance);
demayer 0:6bf0743ece18 117
demayer 0:6bf0743ece18 118 // Configure output compare channel 1 for mbed timeout (enabled later when used)
demayer 0:6bf0743ece18 119 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
demayer 0:6bf0743ece18 120
demayer 0:6bf0743ece18 121 // Configure output compare channel 2 for HAL tick
demayer 0:6bf0743ece18 122 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
demayer 0:6bf0743ece18 123 PreviousVal = __HAL_TIM_GET_COUNTER(&TimMasterHandle);
demayer 0:6bf0743ece18 124 __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
demayer 0:6bf0743ece18 125
demayer 0:6bf0743ece18 126
demayer 0:6bf0743ece18 127
demayer 0:6bf0743ece18 128 // Configure interrupts
demayer 0:6bf0743ece18 129 // Update interrupt used for 32-bit counter
demayer 0:6bf0743ece18 130 // Output compare channel 1 interrupt for mbed timeout
demayer 0:6bf0743ece18 131 // Output compare channel 2 interrupt for HAL tick
demayer 0:6bf0743ece18 132 #if defined(TARGET_STM32F0)
demayer 0:6bf0743ece18 133 NVIC_SetVector(TIM_MST_UP_IRQ, (uint32_t)timer_update_irq_handler);
demayer 0:6bf0743ece18 134 NVIC_EnableIRQ(TIM_MST_UP_IRQ);
demayer 0:6bf0743ece18 135 NVIC_SetPriority(TIM_MST_UP_IRQ, 0);
demayer 0:6bf0743ece18 136 NVIC_SetVector(TIM_MST_OC_IRQ, (uint32_t)timer_oc_irq_handler);
demayer 0:6bf0743ece18 137 NVIC_EnableIRQ(TIM_MST_OC_IRQ);
demayer 0:6bf0743ece18 138 NVIC_SetPriority(TIM_MST_OC_IRQ, 1);
demayer 0:6bf0743ece18 139 #else
demayer 0:6bf0743ece18 140 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
demayer 0:6bf0743ece18 141 NVIC_EnableIRQ(TIM_MST_IRQ);
demayer 0:6bf0743ece18 142 #endif
demayer 0:6bf0743ece18 143
demayer 0:6bf0743ece18 144 // Enable interrupts
demayer 0:6bf0743ece18 145 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_UPDATE); // For 32-bit counter
demayer 0:6bf0743ece18 146 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2); // For HAL tick
demayer 0:6bf0743ece18 147
demayer 0:6bf0743ece18 148 // Enable timer
demayer 0:6bf0743ece18 149 HAL_TIM_Base_Start(&TimMasterHandle);
demayer 0:6bf0743ece18 150
demayer 0:6bf0743ece18 151 // Freeze timer on stop/breakpoint
demayer 0:6bf0743ece18 152 // Define the FREEZE_TIMER_ON_DEBUG macro in mbed_app.json for example
demayer 0:6bf0743ece18 153 #if !defined(NDEBUG) && defined(FREEZE_TIMER_ON_DEBUG) && defined(TIM_MST_DBGMCU_FREEZE)
demayer 0:6bf0743ece18 154 TIM_MST_DBGMCU_FREEZE;
demayer 0:6bf0743ece18 155 #endif
demayer 0:6bf0743ece18 156
demayer 0:6bf0743ece18 157 #if DEBUG_TICK > 0
demayer 0:6bf0743ece18 158 __HAL_RCC_GPIOB_CLK_ENABLE();
demayer 0:6bf0743ece18 159 GPIO_InitTypeDef GPIO_InitStruct;
demayer 0:6bf0743ece18 160 GPIO_InitStruct.Pin = GPIO_PIN_6;
demayer 0:6bf0743ece18 161 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
demayer 0:6bf0743ece18 162 GPIO_InitStruct.Pull = GPIO_PULLUP;
demayer 0:6bf0743ece18 163 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
demayer 0:6bf0743ece18 164 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
demayer 0:6bf0743ece18 165 #endif
demayer 0:6bf0743ece18 166
demayer 0:6bf0743ece18 167 return HAL_OK;
demayer 0:6bf0743ece18 168 }
demayer 0:6bf0743ece18 169
demayer 0:6bf0743ece18 170 /* NOTE: must be called with interrupts disabled! */
demayer 0:6bf0743ece18 171 void HAL_SuspendTick(void)
demayer 0:6bf0743ece18 172 {
demayer 0:6bf0743ece18 173 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
demayer 0:6bf0743ece18 174 }
demayer 0:6bf0743ece18 175
demayer 0:6bf0743ece18 176 /* NOTE: must be called with interrupts disabled! */
demayer 0:6bf0743ece18 177 void HAL_ResumeTick(void)
demayer 0:6bf0743ece18 178 {
demayer 0:6bf0743ece18 179 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
demayer 0:6bf0743ece18 180 }
demayer 0:6bf0743ece18 181
demayer 0:6bf0743ece18 182 #endif // TIM_MST_16BIT