mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_STM/hal_tick_32b.c@181:57724642e740, 2018-02-16 (annotated)

Committer:
AnnaBridge
Date:
Fri Feb 16 16:09:33 2018 +0000
Revision:
181:57724642e740
Parent:
180:96ed750bd169
Child:
186:707f6e361f3e
mbed-dev library. Release version 159.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 153:fa9ff456f731 1 /* mbed Microcontroller Library
<> 153:fa9ff456f731 2 * Copyright (c) 2006-2016 ARM Limited
<> 153:fa9ff456f731 3 *
<> 153:fa9ff456f731 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 153:fa9ff456f731 5 * you may not use this file except in compliance with the License.
<> 153:fa9ff456f731 6 * You may obtain a copy of the License at
<> 153:fa9ff456f731 7 *
<> 153:fa9ff456f731 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 153:fa9ff456f731 9 *
<> 153:fa9ff456f731 10 * Unless required by applicable law or agreed to in writing, software
<> 153:fa9ff456f731 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 153:fa9ff456f731 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 153:fa9ff456f731 13 * See the License for the specific language governing permissions and
<> 153:fa9ff456f731 14 * limitations under the License.
<> 153:fa9ff456f731 15 */
<> 153:fa9ff456f731 16 #include "hal_tick.h"
<> 153:fa9ff456f731 17
<> 153:fa9ff456f731 18 // A 32-bit timer is used
<> 153:fa9ff456f731 19 #if !TIM_MST_16BIT
<> 153:fa9ff456f731 20
<> 153:fa9ff456f731 21 #define DEBUG_TICK 0 // Set to 1 to toggle a pin (see below which pin) at each tick
<> 153:fa9ff456f731 22
<> 153:fa9ff456f731 23 extern TIM_HandleTypeDef TimMasterHandle;
<> 153:fa9ff456f731 24
<> 160:d5399cc887bb 25 extern void HAL_IncTick(void);
<> 160:d5399cc887bb 26
<> 153:fa9ff456f731 27 volatile uint32_t PreviousVal = 0;
<> 153:fa9ff456f731 28
<> 153:fa9ff456f731 29 void us_ticker_irq_handler(void);
<> 153:fa9ff456f731 30
<> 153:fa9ff456f731 31 void timer_irq_handler(void)
<> 153:fa9ff456f731 32 {
<> 153:fa9ff456f731 33 // Channel 1 for mbed timeout
<> 153:fa9ff456f731 34 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
<> 153:fa9ff456f731 35 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC1) == SET) {
<> 153:fa9ff456f731 36 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
<> 153:fa9ff456f731 37 us_ticker_irq_handler();
<> 153:fa9ff456f731 38 }
<> 153:fa9ff456f731 39 }
<> 153:fa9ff456f731 40
<> 153:fa9ff456f731 41 // Channel 2 for HAL tick
<> 153:fa9ff456f731 42 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC2) == SET) {
<> 153:fa9ff456f731 43 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC2) == SET) {
<> 153:fa9ff456f731 44 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
Anna Bridge 180:96ed750bd169 45 uint32_t val = __HAL_TIM_GET_COUNTER(&TimMasterHandle);
<> 153:fa9ff456f731 46 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
<> 153:fa9ff456f731 47 // Increment HAL variable
<> 153:fa9ff456f731 48 HAL_IncTick();
<> 153:fa9ff456f731 49 // Prepare next interrupt
AnnaBridge 165:e614a9f1c9e2 50 __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
<> 153:fa9ff456f731 51 PreviousVal = val;
<> 153:fa9ff456f731 52 #if DEBUG_TICK > 0
<> 153:fa9ff456f731 53 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
<> 153:fa9ff456f731 54 #endif
<> 153:fa9ff456f731 55 }
<> 153:fa9ff456f731 56 }
<> 153:fa9ff456f731 57 }
<> 153:fa9ff456f731 58 }
<> 153:fa9ff456f731 59
<> 153:fa9ff456f731 60 // Reconfigure the HAL tick using a standard timer instead of systick.
<> 153:fa9ff456f731 61 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
<> 153:fa9ff456f731 62 {
<> 153:fa9ff456f731 63 RCC_ClkInitTypeDef RCC_ClkInitStruct;
<> 153:fa9ff456f731 64 uint32_t PclkFreq;
<> 153:fa9ff456f731 65
<> 153:fa9ff456f731 66 // Get clock configuration
<> 153:fa9ff456f731 67 // Note: PclkFreq contains here the Latency (not used after)
<> 153:fa9ff456f731 68 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
<> 153:fa9ff456f731 69
<> 153:fa9ff456f731 70 // Get timer clock value
<> 153:fa9ff456f731 71 #if TIM_MST_PCLK == 1
<> 153:fa9ff456f731 72 PclkFreq = HAL_RCC_GetPCLK1Freq();
<> 153:fa9ff456f731 73 #else
<> 153:fa9ff456f731 74 PclkFreq = HAL_RCC_GetPCLK2Freq();
<> 153:fa9ff456f731 75 #endif
<> 153:fa9ff456f731 76
<> 153:fa9ff456f731 77 // Enable timer clock
<> 153:fa9ff456f731 78 TIM_MST_RCC;
<> 153:fa9ff456f731 79
<> 153:fa9ff456f731 80 // Reset timer
<> 153:fa9ff456f731 81 TIM_MST_RESET_ON;
<> 153:fa9ff456f731 82 TIM_MST_RESET_OFF;
<> 153:fa9ff456f731 83
<> 153:fa9ff456f731 84 // Configure time base
<> 153:fa9ff456f731 85 TimMasterHandle.Instance = TIM_MST;
<> 153:fa9ff456f731 86 TimMasterHandle.Init.Period = 0xFFFFFFFF;
<> 153:fa9ff456f731 87
<> 153:fa9ff456f731 88 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
<> 153:fa9ff456f731 89 #if TIM_MST_PCLK == 1
<> 153:fa9ff456f731 90 if (RCC_ClkInitStruct.APB1CLKDivider == RCC_HCLK_DIV1) {
<> 153:fa9ff456f731 91 #else
<> 153:fa9ff456f731 92 if (RCC_ClkInitStruct.APB2CLKDivider == RCC_HCLK_DIV1) {
<> 153:fa9ff456f731 93 #endif
<> 153:fa9ff456f731 94 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq) / 1000000) - 1; // 1 us tick
<> 160:d5399cc887bb 95 } else {
<> 153:fa9ff456f731 96 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq * 2) / 1000000) - 1; // 1 us tick
<> 153:fa9ff456f731 97 }
<> 153:fa9ff456f731 98
<> 153:fa9ff456f731 99 TimMasterHandle.Init.ClockDivision = 0;
<> 153:fa9ff456f731 100 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
<> 153:fa9ff456f731 101 #if !TARGET_STM32L1
<> 153:fa9ff456f731 102 TimMasterHandle.Init.RepetitionCounter = 0;
<> 153:fa9ff456f731 103 #endif
AnnaBridge 167:e84263d55307 104 #ifdef TIM_AUTORELOAD_PRELOAD_DISABLE
<> 156:95d6b41a828b 105 TimMasterHandle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
<> 156:95d6b41a828b 106 #endif
<> 153:fa9ff456f731 107 HAL_TIM_OC_Init(&TimMasterHandle);
<> 153:fa9ff456f731 108
<> 153:fa9ff456f731 109 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
<> 153:fa9ff456f731 110 NVIC_EnableIRQ(TIM_MST_IRQ);
<> 153:fa9ff456f731 111
<> 153:fa9ff456f731 112 // Channel 1 for mbed timeout
<> 153:fa9ff456f731 113 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
<> 153:fa9ff456f731 114
<> 153:fa9ff456f731 115 // Channel 2 for HAL tick
<> 153:fa9ff456f731 116 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
Anna Bridge 180:96ed750bd169 117 PreviousVal = __HAL_TIM_GET_COUNTER(&TimMasterHandle);
AnnaBridge 165:e614a9f1c9e2 118 __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
<> 153:fa9ff456f731 119 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
<> 153:fa9ff456f731 120
AnnaBridge 173:e131a1973e81 121 // Freeze timer on stop/breakpoint
AnnaBridge 175:af195413fb11 122 // Define the FREEZE_TIMER_ON_DEBUG macro in mbed_app.json for example
AnnaBridge 175:af195413fb11 123 #if !defined(NDEBUG) && defined(FREEZE_TIMER_ON_DEBUG) && defined(TIM_MST_DBGMCU_FREEZE)
AnnaBridge 173:e131a1973e81 124 TIM_MST_DBGMCU_FREEZE;
AnnaBridge 173:e131a1973e81 125 #endif
AnnaBridge 173:e131a1973e81 126
<> 153:fa9ff456f731 127 #if DEBUG_TICK > 0
AnnaBridge 165:e614a9f1c9e2 128 __HAL_RCC_GPIOB_CLK_ENABLE();
<> 153:fa9ff456f731 129 GPIO_InitTypeDef GPIO_InitStruct;
<> 153:fa9ff456f731 130 GPIO_InitStruct.Pin = GPIO_PIN_6;
<> 153:fa9ff456f731 131 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
<> 153:fa9ff456f731 132 GPIO_InitStruct.Pull = GPIO_PULLUP;
<> 153:fa9ff456f731 133 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
<> 153:fa9ff456f731 134 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
<> 153:fa9ff456f731 135 #endif
<> 153:fa9ff456f731 136
<> 153:fa9ff456f731 137 return HAL_OK;
<> 153:fa9ff456f731 138 }
<> 153:fa9ff456f731 139
AnnaBridge 174:b96e65c34a4d 140 /* NOTE: must be called with interrupts disabled! */
<> 153:fa9ff456f731 141 void HAL_SuspendTick(void)
<> 153:fa9ff456f731 142 {
<> 153:fa9ff456f731 143 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
<> 153:fa9ff456f731 144 }
<> 153:fa9ff456f731 145
AnnaBridge 174:b96e65c34a4d 146 /* NOTE: must be called with interrupts disabled! */
<> 153:fa9ff456f731 147 void HAL_ResumeTick(void)
<> 153:fa9ff456f731 148 {
<> 153:fa9ff456f731 149 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
<> 153:fa9ff456f731 150 }
<> 153:fa9ff456f731 151
<> 153:fa9ff456f731 152 #endif // !TIM_MST_16BIT