STM32F0_HC-SR04(distance-measure).rar_hc32f030_hc_sr04 _stm32f0_

/** ****************************************************************************** * @file stm32f0xx_tim.c * @author MCD Application Team * @version V1.0.0 * @date 23-March-2012 * @brief This file provides firmware functions to manage the following * functionalities of the TIM peripheral: * + TimeBase management * + Output Compare management * + Input Capture management * + Interrupts, DMA and flags management * + Clocks management * + Synchronization management * + Specific interface management * + Specific remapping management * * @verbatim =============================================================================== ##### How to use this driver ##### =============================================================================== [..] This driver provides functions to configure and program the TIM of all STM32F0xx devices These functions are split in 8 groups: (#) TIM TimeBase management: this group includes all needed functions to configure the TM Timebase unit: (++) Set/Get Prescaler. (++) Set/Get Autoreload. (++) Counter modes configuration. (++) Set Clock division. (++) Select the One Pulse mode. (++) Update Request Configuration. (++) Update Disable Configuration. (++) Auto-Preload Configuration. (++) Enable/Disable the counter. (#) TIM Output Compare management: this group includes all needed functions to configure the Capture/Compare unit used in Output compare mode: (++) Configure each channel, independently, in Output Compare mode. (++) Select the output compare modes. (++) Select the Polarities of each channel. (++) Set/Get the Capture/Compare register values. (++) Select the Output Compare Fast mode. (++) Select the Output Compare Forced mode. (++) Output Compare-Preload Configuration. (++) Clear Output Compare Reference. (++) Select the OCREF Clear signal. (++) Enable/Disable the Capture/Compare Channels. (#) TIM Input Capture management: this group includes all needed functions to configure the Capture/Compare unit used in Input Capture mode: (++) Configure each channel in input capture mode. (++) Configure Channel1/2 in PWM Input mode. (++) Set the Input Capture Prescaler. (++) Get the Capture/Compare values. (#) Advanced-control timers (TIM1) specific features (++) Configures the Break input, dead time, Lock level, the OSSI, the OSSR State and the AOE(automatic output enable) (++) Enable/Disable the TIM peripheral Main Outputs (++) Select the Commutation event (++) Set/Reset the Capture Compare Preload Control bit (#) TIM interrupts, DMA and flags management. (++) Enable/Disable interrupt sources. (++) Get flags status. (++) Clear flags/ Pending bits. (++) Enable/Disable DMA requests. (++) Configure DMA burst mode. (++) Select CaptureCompare DMA request. (#) TIM clocks management: this group includes all needed functions to configure the clock controller unit: (++) Select internal/External clock. (++) Select the external clock mode: ETR(Mode1/Mode2), TIx or ITRx. (#) TIM synchronization management: this group includes all needed. functions to configure the Synchronization unit: (++) Select Input Trigger. (++) Select Output Trigger. (++) Select Master Slave Mode. (++) ETR Configuration when used as external trigger. (#) TIM specific interface management, this group includes all needed functions to use the specific TIM interface: (++) Encoder Interface Configuration. (++) Select Hall Sensor. (#) TIM specific remapping management includes the Remapping configuration of specific timers @endverbatim * ****************************************************************************** * @attention * * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2> * * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); * You may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.st.com/software_license_agreement_liberty_v2 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32f0xx_tim.h" #include "stm32f0xx_rcc.h" /** @addtogroup STM32F0xx_StdPeriph_Driver * @{ */ /** @defgroup TIM * @brief TIM driver modules * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* ---------------------- TIM registers bit mask ------------------------ */ #define SMCR_ETR_MASK ((uint16_t)0x00FF) #define CCMR_OFFSET ((uint16_t)0x0018) #define CCER_CCE_SET ((uint16_t)0x0001) #define CCER_CCNE_SET ((uint16_t)0x0004) /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ static void TI1_Config(TIM_TypeDef* TIMx, uint16_t TIM_ICPolarity, uint16_t TIM_ICSelection, uint16_t TIM_ICFilter); static void TI2_Config(TIM_TypeDef* TIMx, uint16_t TIM_ICPolarity, uint16_t TIM_ICSelection, uint16_t TIM_ICFilter); static void TI3_Config(TIM_TypeDef* TIMx, uint16_t TIM_ICPolarity, uint16_t TIM_ICSelection, uint16_t TIM_ICFilter); static void TI4_Config(TIM_TypeDef* TIMx, uint16_t TIM_ICPolarity, uint16_t TIM_ICSelection, uint16_t TIM_ICFilter); /* Private functions ---------------------------------------------------------*/ /** @defgroup TIM_Private_Functions * @{ */ /** @defgroup TIM_Group1 TimeBase management functions * @brief TimeBase management functions * @verbatim =============================================================================== ##### TimeBase management functions ##### =============================================================================== *** TIM Driver: how to use it in Timing(Time base) Mode *** =============================================================================== [..] To use the Timer in Timing(Time base) mode, the following steps are mandatory: (#) Enable TIM clock using RCC_APBxPeriphClockCmd(RCC_APBxPeriph_TIMx, ENABLE) function. (#) Fill the TIM_TimeBaseInitStruct with the desired parameters. (#) Call TIM_TimeBaseInit(TIMx, &