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targets/TARGET_STM/hal_tick_32b.c@153:fa9ff456f731, 2016-12-20 (annotated)

Committer:
<>
Date:
Tue Dec 20 17:27:56 2016 +0000
Revision:
153:fa9ff456f731
Child:
156:95d6b41a828b
This updates the lib to the mbed lib v132

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
<> 153:fa9ff456f731 25 volatile uint32_t PreviousVal = 0;
<> 153:fa9ff456f731 26
<> 153:fa9ff456f731 27 void us_ticker_irq_handler(void);
<> 153:fa9ff456f731 28
<> 153:fa9ff456f731 29 void timer_irq_handler(void)
<> 153:fa9ff456f731 30 {
<> 153:fa9ff456f731 31 // Channel 1 for mbed timeout
<> 153:fa9ff456f731 32 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
<> 153:fa9ff456f731 33 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC1) == SET) {
<> 153:fa9ff456f731 34 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
<> 153:fa9ff456f731 35 us_ticker_irq_handler();
<> 153:fa9ff456f731 36 }
<> 153:fa9ff456f731 37 }
<> 153:fa9ff456f731 38
<> 153:fa9ff456f731 39 // Channel 2 for HAL tick
<> 153:fa9ff456f731 40 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC2) == SET) {
<> 153:fa9ff456f731 41 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC2) == SET) {
<> 153:fa9ff456f731 42 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
<> 153:fa9ff456f731 43 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
<> 153:fa9ff456f731 44 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
<> 153:fa9ff456f731 45 // Increment HAL variable
<> 153:fa9ff456f731 46 HAL_IncTick();
<> 153:fa9ff456f731 47 // Prepare next interrupt
<> 153:fa9ff456f731 48 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
<> 153:fa9ff456f731 49 PreviousVal = val;
<> 153:fa9ff456f731 50 #if DEBUG_TICK > 0
<> 153:fa9ff456f731 51 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
<> 153:fa9ff456f731 52 #endif
<> 153:fa9ff456f731 53 }
<> 153:fa9ff456f731 54 }
<> 153:fa9ff456f731 55 }
<> 153:fa9ff456f731 56 }
<> 153:fa9ff456f731 57
<> 153:fa9ff456f731 58 // Reconfigure the HAL tick using a standard timer instead of systick.
<> 153:fa9ff456f731 59 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
<> 153:fa9ff456f731 60 {
<> 153:fa9ff456f731 61 RCC_ClkInitTypeDef RCC_ClkInitStruct;
<> 153:fa9ff456f731 62 uint32_t PclkFreq;
<> 153:fa9ff456f731 63
<> 153:fa9ff456f731 64 // Get clock configuration
<> 153:fa9ff456f731 65 // Note: PclkFreq contains here the Latency (not used after)
<> 153:fa9ff456f731 66 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
<> 153:fa9ff456f731 67
<> 153:fa9ff456f731 68 // Get timer clock value
<> 153:fa9ff456f731 69 #if TIM_MST_PCLK == 1
<> 153:fa9ff456f731 70 PclkFreq = HAL_RCC_GetPCLK1Freq();
<> 153:fa9ff456f731 71 #else
<> 153:fa9ff456f731 72 PclkFreq = HAL_RCC_GetPCLK2Freq();
<> 153:fa9ff456f731 73 #endif
<> 153:fa9ff456f731 74
<> 153:fa9ff456f731 75 // Enable timer clock
<> 153:fa9ff456f731 76 TIM_MST_RCC;
<> 153:fa9ff456f731 77
<> 153:fa9ff456f731 78 // Reset timer
<> 153:fa9ff456f731 79 TIM_MST_RESET_ON;
<> 153:fa9ff456f731 80 TIM_MST_RESET_OFF;
<> 153:fa9ff456f731 81
<> 153:fa9ff456f731 82 // Configure time base
<> 153:fa9ff456f731 83 TimMasterHandle.Instance = TIM_MST;
<> 153:fa9ff456f731 84 TimMasterHandle.Init.Period = 0xFFFFFFFF;
<> 153:fa9ff456f731 85
<> 153:fa9ff456f731 86 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
<> 153:fa9ff456f731 87 #if TIM_MST_PCLK == 1
<> 153:fa9ff456f731 88 if (RCC_ClkInitStruct.APB1CLKDivider == RCC_HCLK_DIV1) {
<> 153:fa9ff456f731 89 #else
<> 153:fa9ff456f731 90 if (RCC_ClkInitStruct.APB2CLKDivider == RCC_HCLK_DIV1) {
<> 153:fa9ff456f731 91 #endif
<> 153:fa9ff456f731 92 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq) / 1000000) - 1; // 1 us tick
<> 153:fa9ff456f731 93 }
<> 153:fa9ff456f731 94 else {
<> 153:fa9ff456f731 95 TimMasterHandle.Init.Prescaler = (uint16_t)((PclkFreq * 2) / 1000000) - 1; // 1 us tick
<> 153:fa9ff456f731 96 }
<> 153:fa9ff456f731 97
<> 153:fa9ff456f731 98 TimMasterHandle.Init.ClockDivision = 0;
<> 153:fa9ff456f731 99 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
<> 153:fa9ff456f731 100 #if !TARGET_STM32L1
<> 153:fa9ff456f731 101 TimMasterHandle.Init.RepetitionCounter = 0;
<> 153:fa9ff456f731 102 #endif
<> 153:fa9ff456f731 103 HAL_TIM_OC_Init(&TimMasterHandle);
<> 153:fa9ff456f731 104
<> 153:fa9ff456f731 105 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
<> 153:fa9ff456f731 106 NVIC_EnableIRQ(TIM_MST_IRQ);
<> 153:fa9ff456f731 107
<> 153:fa9ff456f731 108 // Channel 1 for mbed timeout
<> 153:fa9ff456f731 109 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
<> 153:fa9ff456f731 110
<> 153:fa9ff456f731 111 // Channel 2 for HAL tick
<> 153:fa9ff456f731 112 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
<> 153:fa9ff456f731 113 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
<> 153:fa9ff456f731 114 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
<> 153:fa9ff456f731 115 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
<> 153:fa9ff456f731 116
<> 153:fa9ff456f731 117 #if DEBUG_TICK > 0
<> 153:fa9ff456f731 118 __GPIOB_CLK_ENABLE();
<> 153:fa9ff456f731 119 GPIO_InitTypeDef GPIO_InitStruct;
<> 153:fa9ff456f731 120 GPIO_InitStruct.Pin = GPIO_PIN_6;
<> 153:fa9ff456f731 121 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
<> 153:fa9ff456f731 122 GPIO_InitStruct.Pull = GPIO_PULLUP;
<> 153:fa9ff456f731 123 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
<> 153:fa9ff456f731 124 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
<> 153:fa9ff456f731 125 #endif
<> 153:fa9ff456f731 126
<> 153:fa9ff456f731 127 return HAL_OK;
<> 153:fa9ff456f731 128 }
<> 153:fa9ff456f731 129
<> 153:fa9ff456f731 130 void HAL_SuspendTick(void)
<> 153:fa9ff456f731 131 {
<> 153:fa9ff456f731 132 TimMasterHandle.Instance = TIM_MST;
<> 153:fa9ff456f731 133 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
<> 153:fa9ff456f731 134 }
<> 153:fa9ff456f731 135
<> 153:fa9ff456f731 136 void HAL_ResumeTick(void)
<> 153:fa9ff456f731 137 {
<> 153:fa9ff456f731 138 TimMasterHandle.Instance = TIM_MST;
<> 153:fa9ff456f731 139 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
<> 153:fa9ff456f731 140 }
<> 153:fa9ff456f731 141
<> 153:fa9ff456f731 142 #endif // !TIM_MST_16BIT