mbed official / mbed-src

mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32L4/TARGET_DISCO_L476VG/hal_tick.c@610:813dcc80987e, 2015-08-14 (annotated)

Committer:
mbed_official
Date:
Fri Aug 14 13:15:17 2015 +0100
Revision:
610:813dcc80987e
Synchronized with git revision 6d84db41c6833e0b9b024741eb0616a5f62d5599



Full URL: https://github.com/mbedmicro/mbed/commit/6d84db41c6833e0b9b024741eb0616a5f62d5599/



DISCO_F746NG - Improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 610:813dcc80987e 1 /**
mbed_official 610:813dcc80987e 2 ******************************************************************************
mbed_official 610:813dcc80987e 3 * @file hal_tick.c
mbed_official 610:813dcc80987e 4 * @author MCD Application Team
mbed_official 610:813dcc80987e 5 * @brief Initialization of HAL tick
mbed_official 610:813dcc80987e 6 ******************************************************************************
mbed_official 610:813dcc80987e 7 * @attention
mbed_official 610:813dcc80987e 8 *
mbed_official 610:813dcc80987e 9 * <h2><center>&copy; COPYRIGHT 2015 STMicroelectronics</center></h2>
mbed_official 610:813dcc80987e 10 *
mbed_official 610:813dcc80987e 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 610:813dcc80987e 12 * are permitted provided that the following conditions are met:
mbed_official 610:813dcc80987e 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 610:813dcc80987e 14 * this list of conditions and the following disclaimer.
mbed_official 610:813dcc80987e 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 610:813dcc80987e 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 610:813dcc80987e 17 * and/or other materials provided with the distribution.
mbed_official 610:813dcc80987e 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 610:813dcc80987e 19 * may be used to endorse or promote products derived from this software
mbed_official 610:813dcc80987e 20 * without specific prior written permission.
mbed_official 610:813dcc80987e 21 *
mbed_official 610:813dcc80987e 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 610:813dcc80987e 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 610:813dcc80987e 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 610:813dcc80987e 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 610:813dcc80987e 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 610:813dcc80987e 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 610:813dcc80987e 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 610:813dcc80987e 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 610:813dcc80987e 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 610:813dcc80987e 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 610:813dcc80987e 32 *
mbed_official 610:813dcc80987e 33 ******************************************************************************
mbed_official 610:813dcc80987e 34 */
mbed_official 610:813dcc80987e 35 #include "hal_tick.h"
mbed_official 610:813dcc80987e 36
mbed_official 610:813dcc80987e 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 610:813dcc80987e 38 uint32_t PreviousVal = 0;
mbed_official 610:813dcc80987e 39
mbed_official 610:813dcc80987e 40 void us_ticker_irq_handler(void);
mbed_official 610:813dcc80987e 41
mbed_official 610:813dcc80987e 42 void timer_irq_handler(void) {
mbed_official 610:813dcc80987e 43 // Channel 1 for mbed timeout
mbed_official 610:813dcc80987e 44 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 610:813dcc80987e 45 us_ticker_irq_handler();
mbed_official 610:813dcc80987e 46 }
mbed_official 610:813dcc80987e 47
mbed_official 610:813dcc80987e 48 // Channel 2 for HAL tick
mbed_official 610:813dcc80987e 49 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 610:813dcc80987e 50 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 610:813dcc80987e 51 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 610:813dcc80987e 52 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 610:813dcc80987e 53 // Increment HAL variable
mbed_official 610:813dcc80987e 54 HAL_IncTick();
mbed_official 610:813dcc80987e 55 // Prepare next interrupt
mbed_official 610:813dcc80987e 56 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 610:813dcc80987e 57 PreviousVal = val;
mbed_official 610:813dcc80987e 58 #if 0 // For DEBUG only
mbed_official 610:813dcc80987e 59 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 610:813dcc80987e 60 #endif
mbed_official 610:813dcc80987e 61 }
mbed_official 610:813dcc80987e 62 }
mbed_official 610:813dcc80987e 63 }
mbed_official 610:813dcc80987e 64
mbed_official 610:813dcc80987e 65 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 610:813dcc80987e 66 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 610:813dcc80987e 67 // Enable timer clock
mbed_official 610:813dcc80987e 68 TIM_MST_RCC;
mbed_official 610:813dcc80987e 69
mbed_official 610:813dcc80987e 70 // Reset timer
mbed_official 610:813dcc80987e 71 TIM_MST_RESET_ON;
mbed_official 610:813dcc80987e 72 TIM_MST_RESET_OFF;
mbed_official 610:813dcc80987e 73
mbed_official 610:813dcc80987e 74 // Update the SystemCoreClock variable
mbed_official 610:813dcc80987e 75 SystemCoreClockUpdate();
mbed_official 610:813dcc80987e 76
mbed_official 610:813dcc80987e 77 // Configure time base
mbed_official 610:813dcc80987e 78 TimMasterHandle.Instance = TIM_MST;
mbed_official 610:813dcc80987e 79 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 610:813dcc80987e 80 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 610:813dcc80987e 81 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 610:813dcc80987e 82 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 610:813dcc80987e 83 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 610:813dcc80987e 84
mbed_official 610:813dcc80987e 85 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 610:813dcc80987e 86 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 610:813dcc80987e 87
mbed_official 610:813dcc80987e 88 // Channel 1 for mbed timeout
mbed_official 610:813dcc80987e 89 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 610:813dcc80987e 90
mbed_official 610:813dcc80987e 91 // Channel 2 for HAL tick
mbed_official 610:813dcc80987e 92 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 610:813dcc80987e 93 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 610:813dcc80987e 94 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 610:813dcc80987e 95 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 610:813dcc80987e 96
mbed_official 610:813dcc80987e 97 #if 0 // For DEBUG only
mbed_official 610:813dcc80987e 98 __GPIOB_CLK_ENABLE();
mbed_official 610:813dcc80987e 99 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 610:813dcc80987e 100 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 610:813dcc80987e 101 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 610:813dcc80987e 102 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 610:813dcc80987e 103 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
mbed_official 610:813dcc80987e 104 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 610:813dcc80987e 105 #endif
mbed_official 610:813dcc80987e 106
mbed_official 610:813dcc80987e 107 return HAL_OK;
mbed_official 610:813dcc80987e 108 }
mbed_official 610:813dcc80987e 109
mbed_official 610:813dcc80987e 110 /**
mbed_official 610:813dcc80987e 111 * @}
mbed_official 610:813dcc80987e 112 */
mbed_official 610:813dcc80987e 113
mbed_official 610:813dcc80987e 114 /**
mbed_official 610:813dcc80987e 115 * @}
mbed_official 610:813dcc80987e 116 */
mbed_official 610:813dcc80987e 117
mbed_official 610:813dcc80987e 118 /**
mbed_official 610:813dcc80987e 119 * @}
mbed_official 610:813dcc80987e 120 */
mbed_official 610:813dcc80987e 121 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/