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_NUCLEO_F410RB/hal_tick.c@129:2e517c56bcfb, 2016-05-16 (annotated)

Committer:
nameless129
Date:
Mon May 16 16:50:30 2016 +0000
Revision:
129:2e517c56bcfb
Parent:
25:ac5b0a371348 
PWM Fix:Duty 0%??H???????????????

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 25:ac5b0a371348 1 /**
mbed_official 25:ac5b0a371348 2 ******************************************************************************
mbed_official 25:ac5b0a371348 3 * @file hal_tick.c
mbed_official 25:ac5b0a371348 4 * @author MCD Application Team
mbed_official 25:ac5b0a371348 5 * @brief Initialization of HAL tick
mbed_official 25:ac5b0a371348 6 ******************************************************************************
mbed_official 25:ac5b0a371348 7 * @attention
mbed_official 25:ac5b0a371348 8 *
mbed_official 25:ac5b0a371348 9 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 25:ac5b0a371348 10 *
mbed_official 25:ac5b0a371348 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 25:ac5b0a371348 12 * are permitted provided that the following conditions are met:
mbed_official 25:ac5b0a371348 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 25:ac5b0a371348 14 * this list of conditions and the following disclaimer.
mbed_official 25:ac5b0a371348 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 25:ac5b0a371348 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 25:ac5b0a371348 17 * and/or other materials provided with the distribution.
mbed_official 25:ac5b0a371348 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 25:ac5b0a371348 19 * may be used to endorse or promote products derived from this software
mbed_official 25:ac5b0a371348 20 * without specific prior written permission.
mbed_official 25:ac5b0a371348 21 *
mbed_official 25:ac5b0a371348 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 25:ac5b0a371348 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 25:ac5b0a371348 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 25:ac5b0a371348 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 25:ac5b0a371348 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 25:ac5b0a371348 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 25:ac5b0a371348 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 25:ac5b0a371348 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 25:ac5b0a371348 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 25:ac5b0a371348 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 25:ac5b0a371348 32 *
mbed_official 25:ac5b0a371348 33 ******************************************************************************
mbed_official 25:ac5b0a371348 34 */
mbed_official 25:ac5b0a371348 35 #include "hal_tick.h"
mbed_official 25:ac5b0a371348 36
mbed_official 25:ac5b0a371348 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 25:ac5b0a371348 38 uint32_t PreviousVal = 0;
mbed_official 25:ac5b0a371348 39
mbed_official 25:ac5b0a371348 40 void us_ticker_irq_handler(void);
mbed_official 25:ac5b0a371348 41
mbed_official 25:ac5b0a371348 42 void timer_irq_handler(void) {
mbed_official 25:ac5b0a371348 43 // Channel 1 for mbed timeout
mbed_official 25:ac5b0a371348 44 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC1) == SET) {
mbed_official 25:ac5b0a371348 45 us_ticker_irq_handler();
mbed_official 25:ac5b0a371348 46 }
mbed_official 25:ac5b0a371348 47
mbed_official 25:ac5b0a371348 48 // Channel 2 for HAL tick
mbed_official 25:ac5b0a371348 49 if (__HAL_TIM_GET_ITSTATUS(&TimMasterHandle, TIM_IT_CC2) == SET) {
mbed_official 25:ac5b0a371348 50 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 25:ac5b0a371348 51 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 25:ac5b0a371348 52 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 25:ac5b0a371348 53 // Increment HAL variable
mbed_official 25:ac5b0a371348 54 HAL_IncTick();
mbed_official 25:ac5b0a371348 55 // Prepare next interrupt
mbed_official 25:ac5b0a371348 56 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 25:ac5b0a371348 57 PreviousVal = val;
mbed_official 25:ac5b0a371348 58 #if 0 // For DEBUG only
mbed_official 25:ac5b0a371348 59 HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_6);
mbed_official 25:ac5b0a371348 60 #endif
mbed_official 25:ac5b0a371348 61 }
mbed_official 25:ac5b0a371348 62 }
mbed_official 25:ac5b0a371348 63 }
mbed_official 25:ac5b0a371348 64
mbed_official 25:ac5b0a371348 65 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 25:ac5b0a371348 66 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 25:ac5b0a371348 67 // Enable timer clock
mbed_official 25:ac5b0a371348 68 TIM_MST_RCC;
mbed_official 25:ac5b0a371348 69
mbed_official 25:ac5b0a371348 70 // Reset timer
mbed_official 25:ac5b0a371348 71 TIM_MST_RESET_ON;
mbed_official 25:ac5b0a371348 72 TIM_MST_RESET_OFF;
mbed_official 25:ac5b0a371348 73
mbed_official 25:ac5b0a371348 74 // Update the SystemCoreClock variable
mbed_official 25:ac5b0a371348 75 SystemCoreClockUpdate();
mbed_official 25:ac5b0a371348 76
mbed_official 25:ac5b0a371348 77 // Configure time base
mbed_official 25:ac5b0a371348 78 TimMasterHandle.Instance = TIM_MST;
mbed_official 25:ac5b0a371348 79 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 25:ac5b0a371348 80 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 25:ac5b0a371348 81 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 25:ac5b0a371348 82 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 25:ac5b0a371348 83 TimMasterHandle.Init.RepetitionCounter = 0;
mbed_official 25:ac5b0a371348 84 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 25:ac5b0a371348 85
mbed_official 25:ac5b0a371348 86 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 25:ac5b0a371348 87 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 25:ac5b0a371348 88
mbed_official 25:ac5b0a371348 89 // Channel 1 for mbed timeout
mbed_official 25:ac5b0a371348 90 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 25:ac5b0a371348 91
mbed_official 25:ac5b0a371348 92 // Channel 2 for HAL tick
mbed_official 25:ac5b0a371348 93 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 25:ac5b0a371348 94 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 25:ac5b0a371348 95 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 25:ac5b0a371348 96 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2);
mbed_official 25:ac5b0a371348 97
mbed_official 25:ac5b0a371348 98 #if 0 // For DEBUG only
mbed_official 25:ac5b0a371348 99 __GPIOB_CLK_ENABLE();
mbed_official 25:ac5b0a371348 100 GPIO_InitTypeDef GPIO_InitStruct;
mbed_official 25:ac5b0a371348 101 GPIO_InitStruct.Pin = GPIO_PIN_6;
mbed_official 25:ac5b0a371348 102 GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
mbed_official 25:ac5b0a371348 103 GPIO_InitStruct.Pull = GPIO_PULLUP;
mbed_official 25:ac5b0a371348 104 GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
mbed_official 25:ac5b0a371348 105 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
mbed_official 25:ac5b0a371348 106 #endif
mbed_official 25:ac5b0a371348 107
mbed_official 25:ac5b0a371348 108 return HAL_OK;
mbed_official 25:ac5b0a371348 109 }
mbed_official 25:ac5b0a371348 110
mbed_official 25:ac5b0a371348 111 /**
mbed_official 25:ac5b0a371348 112 * @}
mbed_official 25:ac5b0a371348 113 */
mbed_official 25:ac5b0a371348 114
mbed_official 25:ac5b0a371348 115 /**
mbed_official 25:ac5b0a371348 116 * @}
mbed_official 25:ac5b0a371348 117 */
mbed_official 25:ac5b0a371348 118
mbed_official 25:ac5b0a371348 119 /**
mbed_official 25:ac5b0a371348 120 * @}
mbed_official 25:ac5b0a371348 121 */
mbed_official 25:ac5b0a371348 122 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/