Stuart Northfield / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_DISCO_F334C8/hal_tick.c@381:5460fc57b6e4, 2014-11-03 (annotated)

Committer:
mbed_official
Date:
Mon Nov 03 10:30:07 2014 +0000
Revision:
381:5460fc57b6e4
Synchronized with git revision 02478cd1f27fc7b9643486472635eb515b2bca81



Full URL: https://github.com/mbedmicro/mbed/commit/02478cd1f27fc7b9643486472635eb515b2bca81/



Target: LPC1549 - Fix serial interrupt issues (issue report #616)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 381:5460fc57b6e4 1 /**
mbed_official 381:5460fc57b6e4 2 ******************************************************************************
mbed_official 381:5460fc57b6e4 3 * @file hal_tick.c
mbed_official 381:5460fc57b6e4 4 * @author MCD Application Team
mbed_official 381:5460fc57b6e4 5 * @brief Initialization of HAL tick
mbed_official 381:5460fc57b6e4 6 ******************************************************************************
mbed_official 381:5460fc57b6e4 7 * @attention
mbed_official 381:5460fc57b6e4 8 *
mbed_official 381:5460fc57b6e4 9 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 381:5460fc57b6e4 10 *
mbed_official 381:5460fc57b6e4 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 381:5460fc57b6e4 12 * are permitted provided that the following conditions are met:
mbed_official 381:5460fc57b6e4 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 381:5460fc57b6e4 14 * this list of conditions and the following disclaimer.
mbed_official 381:5460fc57b6e4 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 381:5460fc57b6e4 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 381:5460fc57b6e4 17 * and/or other materials provided with the distribution.
mbed_official 381:5460fc57b6e4 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 381:5460fc57b6e4 19 * may be used to endorse or promote products derived from this software
mbed_official 381:5460fc57b6e4 20 * without specific prior written permission.
mbed_official 381:5460fc57b6e4 21 *
mbed_official 381:5460fc57b6e4 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 381:5460fc57b6e4 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 381:5460fc57b6e4 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 381:5460fc57b6e4 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 381:5460fc57b6e4 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 381:5460fc57b6e4 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 381:5460fc57b6e4 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 381:5460fc57b6e4 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 381:5460fc57b6e4 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 381:5460fc57b6e4 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 381:5460fc57b6e4 32 *
mbed_official 381:5460fc57b6e4 33 ******************************************************************************
mbed_official 381:5460fc57b6e4 34 */
mbed_official 381:5460fc57b6e4 35 #include "hal_tick.h"
mbed_official 381:5460fc57b6e4 36
mbed_official 381:5460fc57b6e4 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 381:5460fc57b6e4 38 uint32_t PreviousVal = 0;
mbed_official 381:5460fc57b6e4 39
mbed_official 381:5460fc57b6e4 40 void us_ticker_irq_handler(void);
mbed_official 381:5460fc57b6e4 41
mbed_official 381:5460fc57b6e4 42 void timer_irq_handler(void) {
mbed_official 381:5460fc57b6e4 43 // Channel 1 for mbed timeout
mbed_official 381:5460fc57b6e4 44 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 381:5460fc57b6e4 45 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 381:5460fc57b6e4 46 us_ticker_irq_handler();
mbed_official 381:5460fc57b6e4 47 }
mbed_official 381:5460fc57b6e4 48
mbed_official 381:5460fc57b6e4 49 // Channel 2 for HAL tick
mbed_official 381:5460fc57b6e4 50 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 381:5460fc57b6e4 51 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 381:5460fc57b6e4 52 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 381:5460fc57b6e4 53 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 381:5460fc57b6e4 54 // Increment HAL variable
mbed_official 381:5460fc57b6e4 55 HAL_IncTick();
mbed_official 381:5460fc57b6e4 56 // Prepare next interrupt
mbed_official 381:5460fc57b6e4 57 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 381:5460fc57b6e4 58 PreviousVal = val;
mbed_official 381:5460fc57b6e4 59 #if 0 // For DEBUG only
mbed_official 381:5460fc57b6e4 60 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 381:5460fc57b6e4 61 #endif
mbed_official 381:5460fc57b6e4 62 }
mbed_official 381:5460fc57b6e4 63 }
mbed_official 381:5460fc57b6e4 64 }
mbed_official 381:5460fc57b6e4 65
mbed_official 381:5460fc57b6e4 66 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 381:5460fc57b6e4 67 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 381:5460fc57b6e4 68 // Enable timer clock
mbed_official 381:5460fc57b6e4 69 TIM_MST_RCC;
mbed_official 381:5460fc57b6e4 70
mbed_official 381:5460fc57b6e4 71 // Reset timer
mbed_official 381:5460fc57b6e4 72 TIM_MST_RESET_ON;
mbed_official 381:5460fc57b6e4 73 TIM_MST_RESET_OFF;
mbed_official 381:5460fc57b6e4 74
mbed_official 381:5460fc57b6e4 75 // Configure time base
mbed_official 381:5460fc57b6e4 76 TimMasterHandle.Instance = TIM_MST;
mbed_official 381:5460fc57b6e4 77 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 381:5460fc57b6e4 78 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 381:5460fc57b6e4 79 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 381:5460fc57b6e4 80 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 381:5460fc57b6e4 81 TimMasterHandle.Init.RepetitionCounter = 0;
mbed_official 381:5460fc57b6e4 82 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 381:5460fc57b6e4 83
mbed_official 381:5460fc57b6e4 84 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 381:5460fc57b6e4 85 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 381:5460fc57b6e4 86
mbed_official 381:5460fc57b6e4 87 // Channel 1 for mbed timeout
mbed_official 381:5460fc57b6e4 88 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 381:5460fc57b6e4 89
mbed_official 381:5460fc57b6e4 90 // Channel 2 for HAL tick
mbed_official 381:5460fc57b6e4 91 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 381:5460fc57b6e4 92 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 381:5460fc57b6e4 93 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 381:5460fc57b6e4 94 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 381:5460fc57b6e4 95
mbed_official 381:5460fc57b6e4 96 #if 0 // For DEBUG only
mbed_official 381:5460fc57b6e4 97 __GPIOB_CLK_ENABLE();
mbed_official 381:5460fc57b6e4 98 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 381:5460fc57b6e4 99 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 381:5460fc57b6e4 100 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 381:5460fc57b6e4 101 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 381:5460fc57b6e4 102 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
mbed_official 381:5460fc57b6e4 103 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 381:5460fc57b6e4 104 #endif
mbed_official 381:5460fc57b6e4 105
mbed_official 381:5460fc57b6e4 106 return HAL_OK;
mbed_official 381:5460fc57b6e4 107 }
mbed_official 381:5460fc57b6e4 108
mbed_official 381:5460fc57b6e4 109 /**
mbed_official 381:5460fc57b6e4 110 * @}
mbed_official 381:5460fc57b6e4 111 */
mbed_official 381:5460fc57b6e4 112
mbed_official 381:5460fc57b6e4 113 /**
mbed_official 381:5460fc57b6e4 114 * @}
mbed_official 381:5460fc57b6e4 115 */
mbed_official 381:5460fc57b6e4 116
mbed_official 381:5460fc57b6e4 117 /**
mbed_official 381:5460fc57b6e4 118 * @}
mbed_official 381:5460fc57b6e4 119 */
mbed_official 381:5460fc57b6e4 120 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/