Daniel Sygut / Application

lol

Dependencies:   MMA8451Q

Fork of Application by Mateusz Kowalik

mbed-dev/targets/TARGET_STM/hal_tick_16b.c@12:3a30cdffa27c, 2018-01-21 (annotated)

Committer:
danix
Date:
Sun Jan 21 22:28:30 2018 +0000
Revision:
12:3a30cdffa27c
Parent:
10:41552d038a69 
Working acelerometer and mouse

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Zaitsev 10:41552d038a69 1 /* mbed Microcontroller Library
Zaitsev 10:41552d038a69 2 * Copyright (c) 2006-2016 ARM Limited
Zaitsev 10:41552d038a69 3 *
Zaitsev 10:41552d038a69 4 * Licensed under the Apache License, Version 2.0 (the "License");
Zaitsev 10:41552d038a69 5 * you may not use this file except in compliance with the License.
Zaitsev 10:41552d038a69 6 * You may obtain a copy of the License at
Zaitsev 10:41552d038a69 7 *
Zaitsev 10:41552d038a69 8 * http://www.apache.org/licenses/LICENSE-2.0
Zaitsev 10:41552d038a69 9 *
Zaitsev 10:41552d038a69 10 * Unless required by applicable law or agreed to in writing, software
Zaitsev 10:41552d038a69 11 * distributed under the License is distributed on an "AS IS" BASIS,
Zaitsev 10:41552d038a69 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Zaitsev 10:41552d038a69 13 * See the License for the specific language governing permissions and
Zaitsev 10:41552d038a69 14 * limitations under the License.
Zaitsev 10:41552d038a69 15 */
Zaitsev 10:41552d038a69 16 #include "hal_tick.h"
Zaitsev 10:41552d038a69 17
Zaitsev 10:41552d038a69 18 // A 16-bit timer is used
Zaitsev 10:41552d038a69 19 #if TIM_MST_16BIT
Zaitsev 10:41552d038a69 20
Zaitsev 10:41552d038a69 21 #define DEBUG_TICK 0 // Set to 1 to toggle a pin (see below which pin) at each tick
Zaitsev 10:41552d038a69 22
Zaitsev 10:41552d038a69 23 extern TIM_HandleTypeDef TimMasterHandle;
Zaitsev 10:41552d038a69 24
Zaitsev 10:41552d038a69 25 extern volatile uint32_t SlaveCounter;
Zaitsev 10:41552d038a69 26 extern volatile uint32_t oc_int_part;
Zaitsev 10:41552d038a69 27 extern volatile uint16_t oc_rem_part;
Zaitsev 10:41552d038a69 28 extern volatile uint8_t tim_it_update;
Zaitsev 10:41552d038a69 29 extern volatile uint32_t tim_it_counter;
Zaitsev 10:41552d038a69 30
Zaitsev 10:41552d038a69 31 volatile uint32_t PreviousVal = 0;
Zaitsev 10:41552d038a69 32
Zaitsev 10:41552d038a69 33 void us_ticker_irq_handler(void);
Zaitsev 10:41552d038a69 34 void set_compare(uint16_t count);
Zaitsev 10:41552d038a69 35
Zaitsev 10:41552d038a69 36 #if defined(TARGET_STM32F0)
Zaitsev 10:41552d038a69 37 void timer_update_irq_handler(void) {
Zaitsev 10:41552d038a69 38 #else
Zaitsev 10:41552d038a69 39 void timer_irq_handler(void)
Zaitsev 10:41552d038a69 40 {
Zaitsev 10:41552d038a69 41 #endif
Zaitsev 10:41552d038a69 42 uint16_t cnt_val = TIM_MST->CNT;
Zaitsev 10:41552d038a69 43 TimMasterHandle.Instance = TIM_MST;
Zaitsev 10:41552d038a69 44
Zaitsev 10:41552d038a69 45 // Clear Update interrupt flag
Zaitsev 10:41552d038a69 46 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE) == SET) {
Zaitsev 10:41552d038a69 47 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_UPDATE) == SET) {
Zaitsev 10:41552d038a69 48 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_UPDATE);
Zaitsev 10:41552d038a69 49 SlaveCounter++;
Zaitsev 10:41552d038a69 50 tim_it_counter = cnt_val + (uint32_t)(SlaveCounter << 16);
Zaitsev 10:41552d038a69 51 tim_it_update = 1;
Zaitsev 10:41552d038a69 52 }
Zaitsev 10:41552d038a69 53 }
Zaitsev 10:41552d038a69 54
Zaitsev 10:41552d038a69 55 #if defined(TARGET_STM32F0)
Zaitsev 10:41552d038a69 56 } // end timer_update_irq_handler function
Zaitsev 10:41552d038a69 57 // Used for mbed timeout (channel 1) and HAL tick (channel 2)
Zaitsev 10:41552d038a69 58 void timer_oc_irq_handler(void)
Zaitsev 10:41552d038a69 59 {
Zaitsev 10:41552d038a69 60 uint16_t cnt_val = TIM_MST->CNT;
Zaitsev 10:41552d038a69 61 TimMasterHandle.Instance = TIM_MST;
Zaitsev 10:41552d038a69 62 #endif
Zaitsev 10:41552d038a69 63
Zaitsev 10:41552d038a69 64 // Channel 1 for mbed timeout
Zaitsev 10:41552d038a69 65 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
Zaitsev 10:41552d038a69 66 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC1) == SET) {
Zaitsev 10:41552d038a69 67 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
Zaitsev 10:41552d038a69 68 if (oc_rem_part > 0) {
Zaitsev 10:41552d038a69 69 set_compare(oc_rem_part); // Finish the remaining time left
Zaitsev 10:41552d038a69 70 oc_rem_part = 0;
Zaitsev 10:41552d038a69 71 } else {
Zaitsev 10:41552d038a69 72 if (oc_int_part > 0) {
Zaitsev 10:41552d038a69 73 set_compare(0xFFFF);
Zaitsev 10:41552d038a69 74 oc_rem_part = cnt_val; // To finish the counter loop the next time
Zaitsev 10:41552d038a69 75 oc_int_part--;
Zaitsev 10:41552d038a69 76 } else {
Zaitsev 10:41552d038a69 77 us_ticker_irq_handler();
Zaitsev 10:41552d038a69 78 }
Zaitsev 10:41552d038a69 79 }
Zaitsev 10:41552d038a69 80 }
Zaitsev 10:41552d038a69 81 }
Zaitsev 10:41552d038a69 82
Zaitsev 10:41552d038a69 83 // Channel 2 for HAL tick
Zaitsev 10:41552d038a69 84 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC2) == SET) {
Zaitsev 10:41552d038a69 85 if (__HAL_TIM_GET_IT_SOURCE(&TimMasterHandle, TIM_IT_CC2) == SET) {
Zaitsev 10:41552d038a69 86 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
Zaitsev 10:41552d038a69 87 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
Zaitsev 10:41552d038a69 88 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
Zaitsev 10:41552d038a69 89 // Increment HAL variable
Zaitsev 10:41552d038a69 90 HAL_IncTick();
Zaitsev 10:41552d038a69 91 // Prepare next interrupt
Zaitsev 10:41552d038a69 92 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
Zaitsev 10:41552d038a69 93 PreviousVal = val;
Zaitsev 10:41552d038a69 94 #if DEBUG_TICK > 0
Zaitsev 10:41552d038a69 95 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
Zaitsev 10:41552d038a69 96 #endif
Zaitsev 10:41552d038a69 97 }
Zaitsev 10:41552d038a69 98 }
Zaitsev 10:41552d038a69 99 }
Zaitsev 10:41552d038a69 100 }
Zaitsev 10:41552d038a69 101
Zaitsev 10:41552d038a69 102 // Reconfigure the HAL tick using a standard timer instead of systick.
Zaitsev 10:41552d038a69 103 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
Zaitsev 10:41552d038a69 104 {
Zaitsev 10:41552d038a69 105 // Enable timer clock
Zaitsev 10:41552d038a69 106 TIM_MST_RCC;
Zaitsev 10:41552d038a69 107
Zaitsev 10:41552d038a69 108 // Reset timer
Zaitsev 10:41552d038a69 109 TIM_MST_RESET_ON;
Zaitsev 10:41552d038a69 110 TIM_MST_RESET_OFF;
Zaitsev 10:41552d038a69 111
Zaitsev 10:41552d038a69 112 // Update the SystemCoreClock variable
Zaitsev 10:41552d038a69 113 SystemCoreClockUpdate();
Zaitsev 10:41552d038a69 114
Zaitsev 10:41552d038a69 115 // Configure time base
Zaitsev 10:41552d038a69 116 TimMasterHandle.Instance = TIM_MST;
Zaitsev 10:41552d038a69 117 TimMasterHandle.Init.Period = 0xFFFF;
Zaitsev 10:41552d038a69 118 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
Zaitsev 10:41552d038a69 119 TimMasterHandle.Init.ClockDivision = 0;
Zaitsev 10:41552d038a69 120 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
Zaitsev 10:41552d038a69 121 HAL_TIM_Base_Init(&TimMasterHandle);
Zaitsev 10:41552d038a69 122
Zaitsev 10:41552d038a69 123 // Configure output compare channel 1 for mbed timeout (enabled later when used)
Zaitsev 10:41552d038a69 124 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
Zaitsev 10:41552d038a69 125
Zaitsev 10:41552d038a69 126 // Configure output compare channel 2 for HAL tick
Zaitsev 10:41552d038a69 127 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
Zaitsev 10:41552d038a69 128 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
Zaitsev 10:41552d038a69 129 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
Zaitsev 10:41552d038a69 130
Zaitsev 10:41552d038a69 131 // Configure interrupts
Zaitsev 10:41552d038a69 132 // Update interrupt used for 32-bit counter
Zaitsev 10:41552d038a69 133 // Output compare channel 1 interrupt for mbed timeout
Zaitsev 10:41552d038a69 134 // Output compare channel 2 interrupt for HAL tick
Zaitsev 10:41552d038a69 135 #if defined(TARGET_STM32F0)
Zaitsev 10:41552d038a69 136 NVIC_SetVector(TIM_MST_UP_IRQ, (uint32_t)timer_update_irq_handler);
Zaitsev 10:41552d038a69 137 NVIC_EnableIRQ(TIM_MST_UP_IRQ);
Zaitsev 10:41552d038a69 138 NVIC_SetPriority(TIM_MST_UP_IRQ, 0);
Zaitsev 10:41552d038a69 139 NVIC_SetVector(TIM_MST_OC_IRQ, (uint32_t)timer_oc_irq_handler);
Zaitsev 10:41552d038a69 140 NVIC_EnableIRQ(TIM_MST_OC_IRQ);
Zaitsev 10:41552d038a69 141 NVIC_SetPriority(TIM_MST_OC_IRQ, 1);
Zaitsev 10:41552d038a69 142 #else
Zaitsev 10:41552d038a69 143 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
Zaitsev 10:41552d038a69 144 NVIC_EnableIRQ(TIM_MST_IRQ);
Zaitsev 10:41552d038a69 145 #endif
Zaitsev 10:41552d038a69 146
Zaitsev 10:41552d038a69 147 // Enable interrupts
Zaitsev 10:41552d038a69 148 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_UPDATE); // For 32-bit counter
Zaitsev 10:41552d038a69 149 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2); // For HAL tick
Zaitsev 10:41552d038a69 150
Zaitsev 10:41552d038a69 151 // Enable timer
Zaitsev 10:41552d038a69 152 HAL_TIM_Base_Start(&TimMasterHandle);
Zaitsev 10:41552d038a69 153
Zaitsev 10:41552d038a69 154 #if DEBUG_TICK > 0
Zaitsev 10:41552d038a69 155 __GPIOB_CLK_ENABLE();
Zaitsev 10:41552d038a69 156 GPIO_InitTypeDef GPIO_InitStruct;
Zaitsev 10:41552d038a69 157 GPIO_InitStruct.Pin = GPIO_PIN_6;
Zaitsev 10:41552d038a69 158 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
Zaitsev 10:41552d038a69 159 GPIO_InitStruct.Pull = GPIO_PULLUP;
Zaitsev 10:41552d038a69 160 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
Zaitsev 10:41552d038a69 161 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
Zaitsev 10:41552d038a69 162 #endif
Zaitsev 10:41552d038a69 163
Zaitsev 10:41552d038a69 164 return HAL_OK;
Zaitsev 10:41552d038a69 165 }
Zaitsev 10:41552d038a69 166
Zaitsev 10:41552d038a69 167 void HAL_SuspendTick(void)
Zaitsev 10:41552d038a69 168 {
Zaitsev 10:41552d038a69 169 TimMasterHandle.Instance = TIM_MST;
Zaitsev 10:41552d038a69 170 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC2);
Zaitsev 10:41552d038a69 171 }
Zaitsev 10:41552d038a69 172
Zaitsev 10:41552d038a69 173 void HAL_ResumeTick(void)
Zaitsev 10:41552d038a69 174 {
Zaitsev 10:41552d038a69 175 TimMasterHandle.Instance = TIM_MST;
Zaitsev 10:41552d038a69 176 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
Zaitsev 10:41552d038a69 177 }
Zaitsev 10:41552d038a69 178
Zaitsev 10:41552d038a69 179 #endif // TIM_MST_16BIT