stm32f0xx_adc.zip_ADC驱动_F031X4_adc031_stm32f031x4_stm32f0xx

/** ****************************************************************************** * @file stm32f0xx_adc.c * @author MCD Application Team * @version V1.5.0 * @date 05-December-2014 * @brief This file provides firmware functions to manage the following * functionalities of the Analog to Digital Convertor (ADC) peripheral: * + Initialization and Configuration * + Power saving * + Analog Watchdog configuration * + Temperature Sensor, Vrefint (Internal Reference Voltage) and * Vbat (Voltage battery) management * + ADC Channels Configuration * + ADC Channels DMA Configuration * + Interrupts and flags management * * @verbatim ================================================================================ ##### How to use this driver ##### ================================================================================ [..] (#) Enable the ADC interface clock using RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); (#) ADC pins configuration (++) Enable the clock for the ADC GPIOs using the following function: RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOx, ENABLE); (++) Configure these ADC pins in analog mode using GPIO_Init(); (#) Configure the ADC conversion resolution, data alignment, external trigger and edge, scan direction and Enable/Disable the continuous mode using the ADC_Init() function. (#) Activate the ADC peripheral using ADC_Cmd() function. *** ADC channels group configuration *** ============================================ [..] (+) To configure the ADC channels features, use ADC_Init() and ADC_ChannelConfig() functions. (+) To activate the continuous mode, use the ADC_ContinuousModeCmd() function. (+) To activate the Discontinuous mode, use the ADC_DiscModeCmd() functions. (+) To activate the overrun mode, use the ADC_OverrunModeCmd() functions. (+) To activate the calibration mode, use the ADC_GetCalibrationFactor() functions. (+) To read the ADC converted values, use the ADC_GetConversionValue() function. *** DMA for ADC channels features configuration *** ============================================================= [..] (+) To enable the DMA mode for ADC channels group, use the ADC_DMACmd() function. (+) To configure the DMA transfer request, use ADC_DMARequestModeConfig() function. * @endverbatim * ****************************************************************************** * @attention * * <h2><center>&copy; COPYRIGHT 2014 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_adc.h" #include "stm32f0xx_rcc.h" /** @addtogroup STM32F0xx_StdPeriph_Driver * @{ */ /** @defgroup ADC * @brief ADC driver modules * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* ADC CFGR mask */ #define CFGR1_CLEAR_MASK ((uint32_t)0xFFFFD203) /* Calibration time out */ #define CALIBRATION_TIMEOUT ((uint32_t)0x0000F000) /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /** @defgroup ADC_Private_Functions * @{ */ /** @defgroup ADC_Group1 Initialization and Configuration functions * @brief Initialization and Configuration functions * @verbatim =============================================================================== ##### Initialization and Configuration functions ##### =============================================================================== [..] This section provides functions allowing to: (+) Initialize and configure the ADC Prescaler (+) ADC Conversion Resolution (12bit..6bit) (+) ADC Continuous Conversion Mode (Continuous or Single conversion) (+) External trigger Edge and source (+) Converted data alignment (left or right) (+) The direction in which the channels will be scanned in the sequence (+) Enable or disable the ADC peripheral @endverbatim * @{ */ /** * @brief Deinitializes ADC1 peripheral registers to their default reset values. * @param ADCx: where x can be 1 to select the ADC peripheral. * @retval None */ void ADC_DeInit(ADC_TypeDef* ADCx) { /* Check the parameters */ assert_param(IS_ADC_ALL_PERIPH(ADCx)); if(ADCx == ADC1) { /* Enable ADC1 reset state */ RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1, ENABLE); /* Release ADC1 from reset state */ RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1, DISABLE); } } /** * @brief Initializes the ADCx peripheral according to the specified parameters * in the ADC_InitStruct. * @note This function is used to configure the global features of the ADC ( * Resolution, Data Alignment, continuous mode activation, External * trigger source and edge, Sequence Scan Direction). * @param ADCx: where x can be 1 to select the ADC peripheral. * @param ADC_InitStruct: pointer to an ADC_InitTypeDef structure that contains * the configuration information for the specified ADC peripheral. * @retval None */ void ADC_Init(ADC_TypeDef* ADCx, ADC_InitTypeDef* ADC_InitStruct) { uint32_t tmpreg = 0; /* Check the parameters */ assert_param(IS_ADC_ALL_PERIPH(ADCx)); assert_param(IS_ADC_RESOLUTION(ADC_InitStruct->ADC_Resolution)); assert_param(IS_FUNCTIONAL_STATE(ADC_InitStruct->ADC_ContinuousConvMode)); assert_param(IS_ADC_EXT_TRIG_EDGE(ADC_InitStruct->ADC_ExternalTrigConvEdge)); assert_param(IS_ADC_EXTERNAL_TRIG_CONV(ADC_InitStruct->ADC_ExternalTrigConv)); assert_param(IS_ADC_DATA_ALIGN(ADC_InitStruct->ADC_DataAlign)); assert_param(IS_ADC_SCAN_DIRECTION(ADC_InitStruct->ADC_ScanDirection)); /* Get the ADCx CFGR value */ tmpreg = ADCx->CFGR1; /* Clear SCANDIR, RES[1:0], ALIGN, EXTSEL[2:0], EXTEN[1:0] and CONT bits */ tmpreg &= CFGR1_CLEAR_MASK; /*---------------------------- ADCx CFGR Configuration ---------------------*/ /* Set RES[1:0] bits according to ADC_Resolution value */ /* Set CONT bit according to ADC_ContinuousConvMode value */ /* Set EXTEN[1:0] bits according to ADC_ExternalTrigConvEdge value */ /* Set EXTSEL[2:0] bits according to ADC_ExternalTrigConv value */ /* Set ALIGN bit according to ADC_DataAlign value */ /* Set SCANDIR bit according to ADC_ScanDirection value */ tmpreg |= (uint32_t)(ADC_InitStruct->ADC_Resolution | ((uint32_t)(ADC_InitStruct->ADC_ContinuousConvMode) << 13) | ADC_InitStruct->ADC_ExternalTrigConvEdge | ADC_InitStruct->ADC_ExternalTrigConv | ADC_