en 129 / mbed-dev

fix LPC812 PWM

Dependents:   IR_LED_Send

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_DISCO_F469NI/hal_tick.c@129:2e517c56bcfb, 2016-05-16 (annotated)

Committer:
nameless129
Date:
Mon May 16 16:50:30 2016 +0000
Revision:
129:2e517c56bcfb
Parent:
19:112740acecfa 
PWM Fix:Duty 0%??H???????????????

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 19:112740acecfa 1 /**
mbed_official 19:112740acecfa 2 ******************************************************************************
mbed_official 19:112740acecfa 3 * @file hal_tick.c
mbed_official 19:112740acecfa 4 * @author MCD Application Team
mbed_official 19:112740acecfa 5 * @brief Initialization of HAL tick
mbed_official 19:112740acecfa 6 ******************************************************************************
mbed_official 19:112740acecfa 7 * @attention
mbed_official 19:112740acecfa 8 *
mbed_official 19:112740acecfa 9 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 19:112740acecfa 10 *
mbed_official 19:112740acecfa 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 19:112740acecfa 12 * are permitted provided that the following conditions are met:
mbed_official 19:112740acecfa 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 19:112740acecfa 14 * this list of conditions and the following disclaimer.
mbed_official 19:112740acecfa 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 19:112740acecfa 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 19:112740acecfa 17 * and/or other materials provided with the distribution.
mbed_official 19:112740acecfa 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 19:112740acecfa 19 * may be used to endorse or promote products derived from this software
mbed_official 19:112740acecfa 20 * without specific prior written permission.
mbed_official 19:112740acecfa 21 *
mbed_official 19:112740acecfa 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 19:112740acecfa 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 19:112740acecfa 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 19:112740acecfa 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 19:112740acecfa 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 19:112740acecfa 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 19:112740acecfa 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 19:112740acecfa 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 19:112740acecfa 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 19:112740acecfa 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 19:112740acecfa 32 *
mbed_official 19:112740acecfa 33 ******************************************************************************
mbed_official 19:112740acecfa 34 */
mbed_official 19:112740acecfa 35 #include "hal_tick.h"
mbed_official 19:112740acecfa 36
mbed_official 19:112740acecfa 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 19:112740acecfa 38 uint32_t PreviousVal = 0;
mbed_official 19:112740acecfa 39
mbed_official 19:112740acecfa 40 void us_ticker_irq_handler(void);
mbed_official 19:112740acecfa 41
mbed_official 19:112740acecfa 42 void timer_irq_handler(void) {
mbed_official 19:112740acecfa 43 // Channel 1 for mbed timeout
mbed_official 19:112740acecfa 44 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 19:112740acecfa 45 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 19:112740acecfa 46 us_ticker_irq_handler();
mbed_official 19:112740acecfa 47 }
mbed_official 19:112740acecfa 48
mbed_official 19:112740acecfa 49 // Channel 2 for HAL tick
mbed_official 19:112740acecfa 50 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 19:112740acecfa 51 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 19:112740acecfa 52 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 19:112740acecfa 53 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 19:112740acecfa 54 // Increment HAL variable
mbed_official 19:112740acecfa 55 HAL_IncTick();
mbed_official 19:112740acecfa 56 // Prepare next interrupt
mbed_official 19:112740acecfa 57 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 19:112740acecfa 58 PreviousVal = val;
mbed_official 19:112740acecfa 59 #if 0 // For DEBUG only
mbed_official 19:112740acecfa 60 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 19:112740acecfa 61 #endif
mbed_official 19:112740acecfa 62 }
mbed_official 19:112740acecfa 63 }
mbed_official 19:112740acecfa 64 }
mbed_official 19:112740acecfa 65
mbed_official 19:112740acecfa 66 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 19:112740acecfa 67 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 19:112740acecfa 68 // Enable timer clock
mbed_official 19:112740acecfa 69 TIM_MST_RCC;
mbed_official 19:112740acecfa 70
mbed_official 19:112740acecfa 71 // Reset timer
mbed_official 19:112740acecfa 72 TIM_MST_RESET_ON;
mbed_official 19:112740acecfa 73 TIM_MST_RESET_OFF;
mbed_official 19:112740acecfa 74
mbed_official 19:112740acecfa 75 // Configure time base
mbed_official 19:112740acecfa 76 TimMasterHandle.Instance = TIM_MST;
mbed_official 19:112740acecfa 77 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 19:112740acecfa 78 if ( SystemCoreClock == 16000000 ) {
mbed_official 19:112740acecfa 79 TimMasterHandle.Init.Prescaler = (uint32_t)( SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 19:112740acecfa 80 } else {
mbed_official 19:112740acecfa 81 TimMasterHandle.Init.Prescaler = (uint32_t)( SystemCoreClock / 2 / 1000000) - 1; // 1 µs tick
mbed_official 19:112740acecfa 82 }
mbed_official 19:112740acecfa 83 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 19:112740acecfa 84 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 19:112740acecfa 85 TimMasterHandle.Init.RepetitionCounter = 0;
mbed_official 19:112740acecfa 86 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 19:112740acecfa 87
mbed_official 19:112740acecfa 88 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 19:112740acecfa 89 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 19:112740acecfa 90
mbed_official 19:112740acecfa 91 // Channel 1 for mbed timeout
mbed_official 19:112740acecfa 92 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 19:112740acecfa 93
mbed_official 19:112740acecfa 94 // Channel 2 for HAL tick
mbed_official 19:112740acecfa 95 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 19:112740acecfa 96 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 19:112740acecfa 97 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 19:112740acecfa 98 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 19:112740acecfa 99
mbed_official 19:112740acecfa 100 #if 0 // For DEBUG only
mbed_official 19:112740acecfa 101 __GPIOB_CLK_ENABLE();
mbed_official 19:112740acecfa 102 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 19:112740acecfa 103 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 19:112740acecfa 104 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 19:112740acecfa 105 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 19:112740acecfa 106 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
mbed_official 19:112740acecfa 107 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 19:112740acecfa 108 #endif
mbed_official 19:112740acecfa 109
mbed_official 19:112740acecfa 110 return HAL_OK;
mbed_official 19:112740acecfa 111 }
mbed_official 19:112740acecfa 112
mbed_official 19:112740acecfa 113 /**
mbed_official 19:112740acecfa 114 * @}
mbed_official 19:112740acecfa 115 */
mbed_official 19:112740acecfa 116
mbed_official 19:112740acecfa 117 /**
mbed_official 19:112740acecfa 118 * @}
mbed_official 19:112740acecfa 119 */
mbed_official 19:112740acecfa 120
mbed_official 19:112740acecfa 121 /**
mbed_official 19:112740acecfa 122 * @}
mbed_official 19:112740acecfa 123 */
mbed_official 19:112740acecfa 124 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/