708 lines
26 KiB
C
708 lines
26 KiB
C
/**
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******************************************************************************
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* @file stm32f2xx_dac.c
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* @author MCD Application Team
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* @version V1.1.2
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* @date 05-March-2012
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* @brief This file provides firmware functions to manage the following
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* functionalities of the Digital-to-Analog Converter (DAC) peripheral:
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* - DAC channels configuration: trigger, output buffer, data format
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* - DMA management
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* - Interrupts and flags management
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*
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* @verbatim
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*
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* ===================================================================
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* DAC Peripheral features
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* ===================================================================
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*
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* DAC Channels
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* =============
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* The device integrates two 12-bit Digital Analog Converters that can
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* be used independently or simultaneously (dual mode):
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* 1- DAC channel1 with DAC_OUT1 (PA4) as output
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* 1- DAC channel2 with DAC_OUT2 (PA5) as output
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*
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* DAC Triggers
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* =============
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* Digital to Analog conversion can be non-triggered using DAC_Trigger_None
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* and DAC_OUT1/DAC_OUT2 is available once writing to DHRx register
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* using DAC_SetChannel1Data() / DAC_SetChannel2Data() functions.
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*
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* Digital to Analog conversion can be triggered by:
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* 1- External event: EXTI Line 9 (any GPIOx_Pin9) using DAC_Trigger_Ext_IT9.
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* The used pin (GPIOx_Pin9) must be configured in input mode.
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*
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* 2- Timers TRGO: TIM2, TIM4, TIM5, TIM6, TIM7 and TIM8
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* (DAC_Trigger_T2_TRGO, DAC_Trigger_T4_TRGO...)
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* The timer TRGO event should be selected using TIM_SelectOutputTrigger()
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*
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* 3- Software using DAC_Trigger_Software
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*
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* DAC Buffer mode feature
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* ========================
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* Each DAC channel integrates an output buffer that can be used to
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* reduce the output impedance, and to drive external loads directly
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* without having to add an external operational amplifier.
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* To enable, the output buffer use
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* DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
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*
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* Refer to the device datasheet for more details about output
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* impedance value with and without output buffer.
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*
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* DAC wave generation feature
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* =============================
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* Both DAC channels can be used to generate
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* 1- Noise wave using DAC_WaveGeneration_Noise
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* 2- Triangle wave using DAC_WaveGeneration_Triangle
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*
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* Wave generation can be disabled using DAC_WaveGeneration_None
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*
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* DAC data format
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* ================
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* The DAC data format can be:
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* 1- 8-bit right alignment using DAC_Align_8b_R
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* 2- 12-bit left alignment using DAC_Align_12b_L
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* 3- 12-bit right alignment using DAC_Align_12b_R
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*
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* DAC data value to voltage correspondence
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* ========================================
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* The analog output voltage on each DAC channel pin is determined
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* by the following equation:
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* DAC_OUTx = VREF+ * DOR / 4095
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* with DOR is the Data Output Register
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* VEF+ is the input voltage reference (refer to the device datasheet)
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* e.g. To set DAC_OUT1 to 0.7V, use
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* DAC_SetChannel1Data(DAC_Align_12b_R, 868);
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* Assuming that VREF+ = 3.3V, DAC_OUT1 = (3.3 * 868) / 4095 = 0.7V
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*
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* DMA requests
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* =============
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* A DMA1 request can be generated when an external trigger (but not
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* a software trigger) occurs if DMA1 requests are enabled using
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* DAC_DMACmd()
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* DMA1 requests are mapped as following:
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* 1- DAC channel1 : mapped on DMA1 Stream5 channel7 which must be
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* already configured
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* 2- DAC channel2 : mapped on DMA1 Stream6 channel7 which must be
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* already configured
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*
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* ===================================================================
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* How to use this driver
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* ===================================================================
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* - DAC APB clock must be enabled to get write access to DAC
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* registers using
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* RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE)
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* - Configure DAC_OUTx (DAC_OUT1: PA4, DAC_OUT2: PA5) in analog mode.
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* - Configure the DAC channel using DAC_Init() function
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* - Enable the DAC channel using DAC_Cmd() function
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*
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* @endverbatim
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*
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2012 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f2xx_dac.h"
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#include "stm32f2xx_rcc.h"
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/** @addtogroup STM32F2xx_StdPeriph_Driver
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* @{
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*/
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/** @defgroup DAC
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* @brief DAC driver modules
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* CR register Mask */
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#define CR_CLEAR_MASK ((uint32_t)0x00000FFE)
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/* DAC Dual Channels SWTRIG masks */
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#define DUAL_SWTRIG_SET ((uint32_t)0x00000003)
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#define DUAL_SWTRIG_RESET ((uint32_t)0xFFFFFFFC)
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/* DHR registers offsets */
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#define DHR12R1_OFFSET ((uint32_t)0x00000008)
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#define DHR12R2_OFFSET ((uint32_t)0x00000014)
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#define DHR12RD_OFFSET ((uint32_t)0x00000020)
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/* DOR register offset */
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#define DOR_OFFSET ((uint32_t)0x0000002C)
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/** @defgroup DAC_Private_Functions
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* @{
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*/
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/** @defgroup DAC_Group1 DAC channels configuration
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* @brief DAC channels configuration: trigger, output buffer, data format
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*
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@verbatim
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===============================================================================
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DAC channels configuration: trigger, output buffer, data format
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===============================================================================
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@endverbatim
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* @{
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*/
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/**
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* @brief Deinitializes the DAC peripheral registers to their default reset values.
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* @param None
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* @retval None
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*/
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void DAC_DeInit(void)
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{
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/* Enable DAC reset state */
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_DAC, ENABLE);
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/* Release DAC from reset state */
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RCC_APB1PeriphResetCmd(RCC_APB1Periph_DAC, DISABLE);
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}
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/**
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* @brief Initializes the DAC peripheral according to the specified parameters
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* in the DAC_InitStruct.
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* @param DAC_Channel: the selected DAC channel.
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* This parameter can be one of the following values:
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* @arg DAC_Channel_1: DAC Channel1 selected
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* @arg DAC_Channel_2: DAC Channel2 selected
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* @param DAC_InitStruct: pointer to a DAC_InitTypeDef structure that contains
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* the configuration information for the specified DAC channel.
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* @retval None
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*/
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void DAC_Init(uint32_t DAC_Channel, DAC_InitTypeDef* DAC_InitStruct)
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{
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uint32_t tmpreg1 = 0, tmpreg2 = 0;
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/* Check the DAC parameters */
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assert_param(IS_DAC_TRIGGER(DAC_InitStruct->DAC_Trigger));
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assert_param(IS_DAC_GENERATE_WAVE(DAC_InitStruct->DAC_WaveGeneration));
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assert_param(IS_DAC_LFSR_UNMASK_TRIANGLE_AMPLITUDE(DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude));
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assert_param(IS_DAC_OUTPUT_BUFFER_STATE(DAC_InitStruct->DAC_OutputBuffer));
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/*---------------------------- DAC CR Configuration --------------------------*/
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/* Get the DAC CR value */
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tmpreg1 = DAC->CR;
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/* Clear BOFFx, TENx, TSELx, WAVEx and MAMPx bits */
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tmpreg1 &= ~(CR_CLEAR_MASK << DAC_Channel);
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/* Configure for the selected DAC channel: buffer output, trigger,
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wave generation, mask/amplitude for wave generation */
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/* Set TSELx and TENx bits according to DAC_Trigger value */
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/* Set WAVEx bits according to DAC_WaveGeneration value */
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/* Set MAMPx bits according to DAC_LFSRUnmask_TriangleAmplitude value */
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/* Set BOFFx bit according to DAC_OutputBuffer value */
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tmpreg2 = (DAC_InitStruct->DAC_Trigger | DAC_InitStruct->DAC_WaveGeneration |
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DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude | \
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DAC_InitStruct->DAC_OutputBuffer);
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/* Calculate CR register value depending on DAC_Channel */
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tmpreg1 |= tmpreg2 << DAC_Channel;
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/* Write to DAC CR */
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DAC->CR = tmpreg1;
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}
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/**
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* @brief Fills each DAC_InitStruct member with its default value.
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* @param DAC_InitStruct: pointer to a DAC_InitTypeDef structure which will
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* be initialized.
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* @retval None
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*/
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void DAC_StructInit(DAC_InitTypeDef* DAC_InitStruct)
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{
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/*--------------- Reset DAC init structure parameters values -----------------*/
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/* Initialize the DAC_Trigger member */
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DAC_InitStruct->DAC_Trigger = DAC_Trigger_None;
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/* Initialize the DAC_WaveGeneration member */
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DAC_InitStruct->DAC_WaveGeneration = DAC_WaveGeneration_None;
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/* Initialize the DAC_LFSRUnmask_TriangleAmplitude member */
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DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bit0;
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/* Initialize the DAC_OutputBuffer member */
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DAC_InitStruct->DAC_OutputBuffer = DAC_OutputBuffer_Enable;
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}
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/**
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* @brief Enables or disables the specified DAC channel.
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* @param DAC_Channel: The selected DAC channel.
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* This parameter can be one of the following values:
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* @arg DAC_Channel_1: DAC Channel1 selected
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* @arg DAC_Channel_2: DAC Channel2 selected
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* @param NewState: new state of the DAC channel.
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* This parameter can be: ENABLE or DISABLE.
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* @note When the DAC channel is enabled the trigger source can no more be modified.
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* @retval None
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*/
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void DAC_Cmd(uint32_t DAC_Channel, FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_DAC_CHANNEL(DAC_Channel));
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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if (NewState != DISABLE)
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{
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/* Enable the selected DAC channel */
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DAC->CR |= (DAC_CR_EN1 << DAC_Channel);
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}
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else
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{
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/* Disable the selected DAC channel */
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DAC->CR &= (~(DAC_CR_EN1 << DAC_Channel));
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}
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}
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/**
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* @brief Enables or disables the selected DAC channel software trigger.
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* @param DAC_Channel: The selected DAC channel.
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* This parameter can be one of the following values:
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* @arg DAC_Channel_1: DAC Channel1 selected
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* @arg DAC_Channel_2: DAC Channel2 selected
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* @param NewState: new state of the selected DAC channel software trigger.
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* This parameter can be: ENABLE or DISABLE.
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* @retval None
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*/
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void DAC_SoftwareTriggerCmd(uint32_t DAC_Channel, FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_DAC_CHANNEL(DAC_Channel));
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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if (NewState != DISABLE)
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{
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/* Enable software trigger for the selected DAC channel */
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DAC->SWTRIGR |= (uint32_t)DAC_SWTRIGR_SWTRIG1 << (DAC_Channel >> 4);
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}
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else
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{
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/* Disable software trigger for the selected DAC channel */
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DAC->SWTRIGR &= ~((uint32_t)DAC_SWTRIGR_SWTRIG1 << (DAC_Channel >> 4));
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}
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}
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/**
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* @brief Enables or disables simultaneously the two DAC channels software triggers.
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* @param NewState: new state of the DAC channels software triggers.
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* This parameter can be: ENABLE or DISABLE.
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* @retval None
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*/
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void DAC_DualSoftwareTriggerCmd(FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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if (NewState != DISABLE)
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{
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/* Enable software trigger for both DAC channels */
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DAC->SWTRIGR |= DUAL_SWTRIG_SET;
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}
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else
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{
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/* Disable software trigger for both DAC channels */
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DAC->SWTRIGR &= DUAL_SWTRIG_RESET;
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}
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}
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/**
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* @brief Enables or disables the selected DAC channel wave generation.
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* @param DAC_Channel: The selected DAC channel.
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* This parameter can be one of the following values:
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* @arg DAC_Channel_1: DAC Channel1 selected
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* @arg DAC_Channel_2: DAC Channel2 selected
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* @param DAC_Wave: specifies the wave type to enable or disable.
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* This parameter can be one of the following values:
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* @arg DAC_Wave_Noise: noise wave generation
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* @arg DAC_Wave_Triangle: triangle wave generation
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* @param NewState: new state of the selected DAC channel wave generation.
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* This parameter can be: ENABLE or DISABLE.
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* @retval None
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*/
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void DAC_WaveGenerationCmd(uint32_t DAC_Channel, uint32_t DAC_Wave, FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_DAC_CHANNEL(DAC_Channel));
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assert_param(IS_DAC_WAVE(DAC_Wave));
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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if (NewState != DISABLE)
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{
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/* Enable the selected wave generation for the selected DAC channel */
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DAC->CR |= DAC_Wave << DAC_Channel;
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}
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else
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{
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/* Disable the selected wave generation for the selected DAC channel */
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DAC->CR &= ~(DAC_Wave << DAC_Channel);
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}
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}
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/**
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* @brief Set the specified data holding register value for DAC channel1.
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* @param DAC_Align: Specifies the data alignment for DAC channel1.
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* This parameter can be one of the following values:
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* @arg DAC_Align_8b_R: 8bit right data alignment selected
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* @arg DAC_Align_12b_L: 12bit left data alignment selected
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* @arg DAC_Align_12b_R: 12bit right data alignment selected
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* @param Data: Data to be loaded in the selected data holding register.
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* @retval None
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*/
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void DAC_SetChannel1Data(uint32_t DAC_Align, uint16_t Data)
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{
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__IO uint32_t tmp = 0;
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/* Check the parameters */
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assert_param(IS_DAC_ALIGN(DAC_Align));
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assert_param(IS_DAC_DATA(Data));
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tmp = (uint32_t)DAC_BASE;
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tmp += DHR12R1_OFFSET + DAC_Align;
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/* Set the DAC channel1 selected data holding register */
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*(__IO uint32_t *) tmp = Data;
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}
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/**
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* @brief Set the specified data holding register value for DAC channel2.
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* @param DAC_Align: Specifies the data alignment for DAC channel2.
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* This parameter can be one of the following values:
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* @arg DAC_Align_8b_R: 8bit right data alignment selected
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* @arg DAC_Align_12b_L: 12bit left data alignment selected
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* @arg DAC_Align_12b_R: 12bit right data alignment selected
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* @param Data: Data to be loaded in the selected data holding register.
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* @retval None
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*/
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void DAC_SetChannel2Data(uint32_t DAC_Align, uint16_t Data)
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{
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__IO uint32_t tmp = 0;
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/* Check the parameters */
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assert_param(IS_DAC_ALIGN(DAC_Align));
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assert_param(IS_DAC_DATA(Data));
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tmp = (uint32_t)DAC_BASE;
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tmp += DHR12R2_OFFSET + DAC_Align;
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/* Set the DAC channel2 selected data holding register */
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*(__IO uint32_t *)tmp = Data;
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}
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/**
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* @brief Set the specified data holding register value for dual channel DAC.
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* @param DAC_Align: Specifies the data alignment for dual channel DAC.
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* This parameter can be one of the following values:
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* @arg DAC_Align_8b_R: 8bit right data alignment selected
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* @arg DAC_Align_12b_L: 12bit left data alignment selected
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* @arg DAC_Align_12b_R: 12bit right data alignment selected
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* @param Data2: Data for DAC Channel2 to be loaded in the selected data holding register.
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* @param Data1: Data for DAC Channel1 to be loaded in the selected data holding register.
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* @note In dual mode, a unique register access is required to write in both
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* DAC channels at the same time.
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* @retval None
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*/
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void DAC_SetDualChannelData(uint32_t DAC_Align, uint16_t Data2, uint16_t Data1)
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{
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uint32_t data = 0, tmp = 0;
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/* Check the parameters */
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assert_param(IS_DAC_ALIGN(DAC_Align));
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assert_param(IS_DAC_DATA(Data1));
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assert_param(IS_DAC_DATA(Data2));
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/* Calculate and set dual DAC data holding register value */
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if (DAC_Align == DAC_Align_8b_R)
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{
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data = ((uint32_t)Data2 << 8) | Data1;
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}
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else
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{
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data = ((uint32_t)Data2 << 16) | Data1;
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}
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tmp = (uint32_t)DAC_BASE;
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tmp += DHR12RD_OFFSET + DAC_Align;
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/* Set the dual DAC selected data holding register */
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*(__IO uint32_t *)tmp = data;
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}
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/**
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* @brief Returns the last data output value of the selected DAC channel.
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* @param DAC_Channel: The selected DAC channel.
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* This parameter can be one of the following values:
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* @arg DAC_Channel_1: DAC Channel1 selected
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* @arg DAC_Channel_2: DAC Channel2 selected
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* @retval The selected DAC channel data output value.
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*/
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uint16_t DAC_GetDataOutputValue(uint32_t DAC_Channel)
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{
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__IO uint32_t tmp = 0;
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/* Check the parameters */
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assert_param(IS_DAC_CHANNEL(DAC_Channel));
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tmp = (uint32_t) DAC_BASE ;
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tmp += DOR_OFFSET + ((uint32_t)DAC_Channel >> 2);
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/* Returns the DAC channel data output register value */
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return (uint16_t) (*(__IO uint32_t*) tmp);
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}
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/**
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* @}
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*/
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/** @defgroup DAC_Group2 DMA management functions
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* @brief DMA management functions
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*
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@verbatim
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===============================================================================
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DMA management functions
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===============================================================================
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@endverbatim
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* @{
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*/
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/**
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* @brief Enables or disables the specified DAC channel DMA request.
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* @note When enabled DMA1 is generated when an external trigger (EXTI Line9,
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* TIM2, TIM4, TIM5, TIM6, TIM7 or TIM8 but not a software trigger) occurs.
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* @param DAC_Channel: The selected DAC channel.
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* This parameter can be one of the following values:
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* @arg DAC_Channel_1: DAC Channel1 selected
|
|
* @arg DAC_Channel_2: DAC Channel2 selected
|
|
* @param NewState: new state of the selected DAC channel DMA request.
|
|
* This parameter can be: ENABLE or DISABLE.
|
|
* @note The DAC channel1 is mapped on DMA1 Stream 5 channel7 which must be
|
|
* already configured.
|
|
* @note The DAC channel2 is mapped on DMA1 Stream 6 channel7 which must be
|
|
* already configured.
|
|
* @retval None
|
|
*/
|
|
void DAC_DMACmd(uint32_t DAC_Channel, FunctionalState NewState)
|
|
{
|
|
/* Check the parameters */
|
|
assert_param(IS_DAC_CHANNEL(DAC_Channel));
|
|
assert_param(IS_FUNCTIONAL_STATE(NewState));
|
|
|
|
if (NewState != DISABLE)
|
|
{
|
|
/* Enable the selected DAC channel DMA request */
|
|
DAC->CR |= (DAC_CR_DMAEN1 << DAC_Channel);
|
|
}
|
|
else
|
|
{
|
|
/* Disable the selected DAC channel DMA request */
|
|
DAC->CR &= (~(DAC_CR_DMAEN1 << DAC_Channel));
|
|
}
|
|
}
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup DAC_Group3 Interrupts and flags management functions
|
|
* @brief Interrupts and flags management functions
|
|
*
|
|
@verbatim
|
|
===============================================================================
|
|
Interrupts and flags management functions
|
|
===============================================================================
|
|
|
|
@endverbatim
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief Enables or disables the specified DAC interrupts.
|
|
* @param DAC_Channel: The selected DAC channel.
|
|
* This parameter can be one of the following values:
|
|
* @arg DAC_Channel_1: DAC Channel1 selected
|
|
* @arg DAC_Channel_2: DAC Channel2 selected
|
|
* @param DAC_IT: specifies the DAC interrupt sources to be enabled or disabled.
|
|
* This parameter can be the following values:
|
|
* @arg DAC_IT_DMAUDR: DMA underrun interrupt mask
|
|
* @note The DMA underrun occurs when a second external trigger arrives before the
|
|
* acknowledgement for the first external trigger is received (first request).
|
|
* @param NewState: new state of the specified DAC interrupts.
|
|
* This parameter can be: ENABLE or DISABLE.
|
|
* @retval None
|
|
*/
|
|
void DAC_ITConfig(uint32_t DAC_Channel, uint32_t DAC_IT, FunctionalState NewState)
|
|
{
|
|
/* Check the parameters */
|
|
assert_param(IS_DAC_CHANNEL(DAC_Channel));
|
|
assert_param(IS_FUNCTIONAL_STATE(NewState));
|
|
assert_param(IS_DAC_IT(DAC_IT));
|
|
|
|
if (NewState != DISABLE)
|
|
{
|
|
/* Enable the selected DAC interrupts */
|
|
DAC->CR |= (DAC_IT << DAC_Channel);
|
|
}
|
|
else
|
|
{
|
|
/* Disable the selected DAC interrupts */
|
|
DAC->CR &= (~(uint32_t)(DAC_IT << DAC_Channel));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Checks whether the specified DAC flag is set or not.
|
|
* @param DAC_Channel: The selected DAC channel.
|
|
* This parameter can be one of the following values:
|
|
* @arg DAC_Channel_1: DAC Channel1 selected
|
|
* @arg DAC_Channel_2: DAC Channel2 selected
|
|
* @param DAC_FLAG: specifies the flag to check.
|
|
* This parameter can be only of the following value:
|
|
* @arg DAC_FLAG_DMAUDR: DMA underrun flag
|
|
* @note The DMA underrun occurs when a second external trigger arrives before the
|
|
* acknowledgement for the first external trigger is received (first request).
|
|
* @retval The new state of DAC_FLAG (SET or RESET).
|
|
*/
|
|
FlagStatus DAC_GetFlagStatus(uint32_t DAC_Channel, uint32_t DAC_FLAG)
|
|
{
|
|
FlagStatus bitstatus = RESET;
|
|
/* Check the parameters */
|
|
assert_param(IS_DAC_CHANNEL(DAC_Channel));
|
|
assert_param(IS_DAC_FLAG(DAC_FLAG));
|
|
|
|
/* Check the status of the specified DAC flag */
|
|
if ((DAC->SR & (DAC_FLAG << DAC_Channel)) != (uint8_t)RESET)
|
|
{
|
|
/* DAC_FLAG is set */
|
|
bitstatus = SET;
|
|
}
|
|
else
|
|
{
|
|
/* DAC_FLAG is reset */
|
|
bitstatus = RESET;
|
|
}
|
|
/* Return the DAC_FLAG status */
|
|
return bitstatus;
|
|
}
|
|
|
|
/**
|
|
* @brief Clears the DAC channel's pending flags.
|
|
* @param DAC_Channel: The selected DAC channel.
|
|
* This parameter can be one of the following values:
|
|
* @arg DAC_Channel_1: DAC Channel1 selected
|
|
* @arg DAC_Channel_2: DAC Channel2 selected
|
|
* @param DAC_FLAG: specifies the flag to clear.
|
|
* This parameter can be of the following value:
|
|
* @arg DAC_FLAG_DMAUDR: DMA underrun flag
|
|
* @note The DMA underrun occurs when a second external trigger arrives before the
|
|
* acknowledgement for the first external trigger is received (first request).
|
|
* @retval None
|
|
*/
|
|
void DAC_ClearFlag(uint32_t DAC_Channel, uint32_t DAC_FLAG)
|
|
{
|
|
/* Check the parameters */
|
|
assert_param(IS_DAC_CHANNEL(DAC_Channel));
|
|
assert_param(IS_DAC_FLAG(DAC_FLAG));
|
|
|
|
/* Clear the selected DAC flags */
|
|
DAC->SR = (DAC_FLAG << DAC_Channel);
|
|
}
|
|
|
|
/**
|
|
* @brief Checks whether the specified DAC interrupt has occurred or not.
|
|
* @param DAC_Channel: The selected DAC channel.
|
|
* This parameter can be one of the following values:
|
|
* @arg DAC_Channel_1: DAC Channel1 selected
|
|
* @arg DAC_Channel_2: DAC Channel2 selected
|
|
* @param DAC_IT: specifies the DAC interrupt source to check.
|
|
* This parameter can be the following values:
|
|
* @arg DAC_IT_DMAUDR: DMA underrun interrupt mask
|
|
* @note The DMA underrun occurs when a second external trigger arrives before the
|
|
* acknowledgement for the first external trigger is received (first request).
|
|
* @retval The new state of DAC_IT (SET or RESET).
|
|
*/
|
|
ITStatus DAC_GetITStatus(uint32_t DAC_Channel, uint32_t DAC_IT)
|
|
{
|
|
ITStatus bitstatus = RESET;
|
|
uint32_t enablestatus = 0;
|
|
|
|
/* Check the parameters */
|
|
assert_param(IS_DAC_CHANNEL(DAC_Channel));
|
|
assert_param(IS_DAC_IT(DAC_IT));
|
|
|
|
/* Get the DAC_IT enable bit status */
|
|
enablestatus = (DAC->CR & (DAC_IT << DAC_Channel)) ;
|
|
|
|
/* Check the status of the specified DAC interrupt */
|
|
if (((DAC->SR & (DAC_IT << DAC_Channel)) != (uint32_t)RESET) && enablestatus)
|
|
{
|
|
/* DAC_IT is set */
|
|
bitstatus = SET;
|
|
}
|
|
else
|
|
{
|
|
/* DAC_IT is reset */
|
|
bitstatus = RESET;
|
|
}
|
|
/* Return the DAC_IT status */
|
|
return bitstatus;
|
|
}
|
|
|
|
/**
|
|
* @brief Clears the DAC channel's interrupt pending bits.
|
|
* @param DAC_Channel: The selected DAC channel.
|
|
* This parameter can be one of the following values:
|
|
* @arg DAC_Channel_1: DAC Channel1 selected
|
|
* @arg DAC_Channel_2: DAC Channel2 selected
|
|
* @param DAC_IT: specifies the DAC interrupt pending bit to clear.
|
|
* This parameter can be the following values:
|
|
* @arg DAC_IT_DMAUDR: DMA underrun interrupt mask
|
|
* @note The DMA underrun occurs when a second external trigger arrives before the
|
|
* acknowledgement for the first external trigger is received (first request).
|
|
* @retval None
|
|
*/
|
|
void DAC_ClearITPendingBit(uint32_t DAC_Channel, uint32_t DAC_IT)
|
|
{
|
|
/* Check the parameters */
|
|
assert_param(IS_DAC_CHANNEL(DAC_Channel));
|
|
assert_param(IS_DAC_IT(DAC_IT));
|
|
|
|
/* Clear the selected DAC interrupt pending bits */
|
|
DAC->SR = (DAC_IT << DAC_Channel);
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|