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  1. /**
  2.   ******************************************************************************
  3.   * @file    stm32f1xx_hal_dac.c
  4.   * @author  MCD Application Team
  5.   * @brief   DAC HAL module driver.
  6.   *         This file provides firmware functions to manage the following
  7.   *         functionalities of the Digital to Analog Converter (DAC) peripheral:
  8.   *           + Initialization and de-initialization functions
  9.   *           + IO operation functions
  10.   *           + Peripheral Control functions
  11.   *           + Peripheral State and Errors functions
  12.   *
  13.   *
  14.   ******************************************************************************
  15.   * @attention
  16.   *
  17.   * Copyright (c) 2016 STMicroelectronics.
  18.   * All rights reserved.
  19.   *
  20.   * This software is licensed under terms that can be found in the LICENSE file
  21.   * in the root directory of this software component.
  22.   * If no LICENSE file comes with this software, it is provided AS-IS.
  23.   *
  24.   ******************************************************************************
  25.   @verbatim
  26.   ==============================================================================
  27.                       ##### DAC Peripheral features #####
  28.   ==============================================================================
  29.     [..]
  30.       *** DAC Channels ***
  31.       ====================
  32.     [..]
  33.     STM32F1 devices integrate two 12-bit Digital Analog Converters
  34.  
  35.     The 2 converters (i.e. channel1 & channel2)
  36.     can be used independently or simultaneously (dual mode):
  37.       (#) DAC channel1 with DAC_OUT1 (PA4) as output or connected to on-chip
  38.           peripherals (ex. timers).
  39.       (#) DAC channel2 with DAC_OUT2 (PA5) as output or connected to on-chip
  40.           peripherals (ex. timers).
  41.  
  42.       *** DAC Triggers ***
  43.       ====================
  44.     [..]
  45.     Digital to Analog conversion can be non-triggered using DAC_TRIGGER_NONE
  46.     and DAC_OUT1/DAC_OUT2 is available once writing to DHRx register.
  47.     [..]
  48.     Digital to Analog conversion can be triggered by:
  49.       (#) External event: EXTI Line 9 (any GPIOx_PIN_9) using DAC_TRIGGER_EXT_IT9.
  50.           The used pin (GPIOx_PIN_9) must be configured in input mode.
  51.  
  52.       (#) Timers TRGO: TIM2, TIM4, TIM6, TIM7
  53.           For STM32F10x connectivity line devices and STM32F100x devices: TIM3
  54.           For STM32F10x high-density and XL-density devices: TIM8
  55.           For STM32F100x high-density value line devices: TIM15 as
  56.           replacement of TIM5.
  57.           (DAC_TRIGGER_T2_TRGO, DAC_TRIGGER_T4_TRGO...)
  58.  
  59.       (#) Software using DAC_TRIGGER_SOFTWARE
  60.  
  61.       *** DAC Buffer mode feature ***
  62.       ===============================
  63.       [..]
  64.       Each DAC channel integrates an output buffer that can be used to
  65.       reduce the output impedance, and to drive external loads directly
  66.       without having to add an external operational amplifier.
  67.       To enable, the output buffer use
  68.       sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
  69.       [..]
  70.       (@) Refer to the device datasheet for more details about output
  71.           impedance value with and without output buffer.
  72.  
  73.       *** GPIO configurations guidelines ***
  74.       =====================
  75.       [..]
  76.       When a DAC channel is used (ex channel1 on PA4) and the other is not
  77.       (ex channel2 on PA5 is configured in Analog and disabled).
  78.       Channel1 may disturb channel2 as coupling effect.
  79.       Note that there is no coupling on channel2 as soon as channel2 is turned on.
  80.       Coupling on adjacent channel could be avoided as follows:
  81.       when unused PA5 is configured as INPUT PULL-UP or DOWN.
  82.       PA5 is configured in ANALOG just before it is turned on.
  83.  
  84.        *** DAC wave generation feature ***
  85.        ===================================
  86.        [..]
  87.        Both DAC channels can be used to generate
  88.          (#) Noise wave
  89.          (#) Triangle wave
  90.  
  91.        *** DAC data format ***
  92.        =======================
  93.        [..]
  94.        The DAC data format can be:
  95.          (#) 8-bit right alignment using DAC_ALIGN_8B_R
  96.          (#) 12-bit left alignment using DAC_ALIGN_12B_L
  97.          (#) 12-bit right alignment using DAC_ALIGN_12B_R
  98.  
  99.        *** DAC data value to voltage correspondence ***
  100.        ================================================
  101.        [..]
  102.        The analog output voltage on each DAC channel pin is determined
  103.        by the following equation:
  104.        [..]
  105.        DAC_OUTx = VREF+ * DOR / 4095
  106.        (+) with  DOR is the Data Output Register
  107.        [..]
  108.           VREF+ is the input voltage reference (refer to the device datasheet)
  109.        [..]
  110.         e.g. To set DAC_OUT1 to 0.7V, use
  111.        (+) Assuming that VREF+ = 3.3V, DAC_OUT1 = (3.3 * 868) / 4095 = 0.7V
  112.  
  113.        *** DMA requests ***
  114.        =====================
  115.        [..]
  116.        A DMA request can be generated when an external trigger (but not a software trigger)
  117.        occurs if DMA1 requests are enabled using HAL_DAC_Start_DMA().
  118.        DMA1 requests are mapped as following:
  119.       (#) DAC channel1 mapped on DMA1 channel3
  120.           for STM32F100x low-density, medium-density, high-density with DAC
  121.           DMA remap:
  122.       (#) DAC channel2 mapped on DMA2 channel3
  123.           for STM32F100x high-density without DAC DMA remap and other
  124.           STM32F1 devices
  125.  
  126.      [..]
  127.     (@) For Dual mode and specific signal (Triangle and noise) generation please
  128.         refer to Extended Features Driver description
  129.  
  130.                       ##### How to use this driver #####
  131.   ==============================================================================
  132.     [..]
  133.       (+) DAC APB clock must be enabled to get write access to DAC
  134.           registers using HAL_DAC_Init()
  135.       (+) Configure DAC_OUTx (DAC_OUT1: PA4, DAC_OUT2: PA5) in analog mode.
  136.       (+) Configure the DAC channel using HAL_DAC_ConfigChannel() function.
  137.       (+) Enable the DAC channel using HAL_DAC_Start() or HAL_DAC_Start_DMA() functions.
  138.  
  139.  
  140.      *** Polling mode IO operation ***
  141.      =================================
  142.      [..]
  143.        (+) Start the DAC peripheral using HAL_DAC_Start()
  144.        (+) To read the DAC last data output value, use the HAL_DAC_GetValue() function.
  145.        (+) Stop the DAC peripheral using HAL_DAC_Stop()
  146.  
  147.      *** DMA mode IO operation ***
  148.      ==============================
  149.      [..]
  150.        (+) Start the DAC peripheral using HAL_DAC_Start_DMA(), at this stage the user specify the length
  151.            of data to be transferred at each end of conversion
  152.            First issued trigger will start the conversion of the value previously set by HAL_DAC_SetValue().
  153.        (+) At the middle of data transfer HAL_DAC_ConvHalfCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  154.            function is executed and user can add his own code by customization of function pointer
  155.            HAL_DAC_ConvHalfCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  156.        (+) At The end of data transfer HAL_DAC_ConvCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  157.            function is executed and user can add his own code by customization of function pointer
  158.            HAL_DAC_ConvCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  159.        (+) In case of transfer Error, HAL_DAC_ErrorCallbackCh1() function is executed and user can
  160.             add his own code by customization of function pointer HAL_DAC_ErrorCallbackCh1
  161.        (+) For STM32F100x devices with specific feature: DMA underrun.
  162.            In case of DMA underrun, DAC interruption triggers and execute internal function HAL_DAC_IRQHandler.
  163.            HAL_DAC_DMAUnderrunCallbackCh1() or HAL_DACEx_DMAUnderrunCallbackCh2()
  164.            function is executed and user can add his own code by customization of function pointer
  165.            HAL_DAC_DMAUnderrunCallbackCh1() or HAL_DACEx_DMAUnderrunCallbackCh2() and
  166.            add his own code by customization of function pointer HAL_DAC_ErrorCallbackCh1()
  167.        (+) Stop the DAC peripheral using HAL_DAC_Stop_DMA()
  168.  
  169.     *** Callback registration ***
  170.     =============================================
  171.     [..]
  172.       The compilation define  USE_HAL_DAC_REGISTER_CALLBACKS when set to 1
  173.       allows the user to configure dynamically the driver callbacks.
  174.  
  175.     Use Functions HAL_DAC_RegisterCallback() to register a user callback,
  176.       it allows to register following callbacks:
  177.       (+) ConvCpltCallbackCh1     : callback when a half transfer is completed on Ch1.
  178.       (+) ConvHalfCpltCallbackCh1 : callback when a transfer is completed on Ch1.
  179.       (+) ErrorCallbackCh1        : callback when an error occurs on Ch1.
  180.       (+) DMAUnderrunCallbackCh1  : callback when an underrun error occurs on Ch1.
  181.       (+) ConvCpltCallbackCh2     : callback when a half transfer is completed on Ch2.
  182.       (+) ConvHalfCpltCallbackCh2 : callback when a transfer is completed on Ch2.
  183.       (+) ErrorCallbackCh2        : callback when an error occurs on Ch2.
  184.       (+) DMAUnderrunCallbackCh2  : callback when an underrun error occurs on Ch2.
  185.       (+) MspInitCallback         : DAC MspInit.
  186.       (+) MspDeInitCallback       : DAC MspdeInit.
  187.       This function takes as parameters the HAL peripheral handle, the Callback ID
  188.       and a pointer to the user callback function.
  189.  
  190.     Use function HAL_DAC_UnRegisterCallback() to reset a callback to the default
  191.       weak (overridden) function. It allows to reset following callbacks:
  192.       (+) ConvCpltCallbackCh1     : callback when a half transfer is completed on Ch1.
  193.       (+) ConvHalfCpltCallbackCh1 : callback when a transfer is completed on Ch1.
  194.       (+) ErrorCallbackCh1        : callback when an error occurs on Ch1.
  195.       (+) DMAUnderrunCallbackCh1  : callback when an underrun error occurs on Ch1.
  196.       (+) ConvCpltCallbackCh2     : callback when a half transfer is completed on Ch2.
  197.       (+) ConvHalfCpltCallbackCh2 : callback when a transfer is completed on Ch2.
  198.       (+) ErrorCallbackCh2        : callback when an error occurs on Ch2.
  199.       (+) DMAUnderrunCallbackCh2  : callback when an underrun error occurs on Ch2.
  200.       (+) MspInitCallback         : DAC MspInit.
  201.       (+) MspDeInitCallback       : DAC MspdeInit.
  202.       (+) All Callbacks
  203.       This function) takes as parameters the HAL peripheral handle and the Callback ID.
  204.  
  205.       By default, after the HAL_DAC_Init and if the state is HAL_DAC_STATE_RESET
  206.       all callbacks are reset to the corresponding legacy weak (overridden) functions.
  207.       Exception done for MspInit and MspDeInit callbacks that are respectively
  208.       reset to the legacy weak (overridden) functions in the HAL_DAC_Init
  209.       and  HAL_DAC_DeInit only when these callbacks are null (not registered beforehand).
  210.       If not, MspInit or MspDeInit are not null, the HAL_DAC_Init and HAL_DAC_DeInit
  211.       keep and use the user MspInit/MspDeInit callbacks (registered beforehand)
  212.  
  213.       Callbacks can be registered/unregistered in READY state only.
  214.       Exception done for MspInit/MspDeInit callbacks that can be registered/unregistered
  215.       in READY or RESET state, thus registered (user) MspInit/DeInit callbacks can be used
  216.       during the Init/DeInit.
  217.       In that case first register the MspInit/MspDeInit user callbacks
  218.       using HAL_DAC_RegisterCallback before calling HAL_DAC_DeInit
  219.       or HAL_DAC_Init function.
  220.  
  221.       When The compilation define USE_HAL_DAC_REGISTER_CALLBACKS is set to 0 or
  222.       not defined, the callback registering feature is not available
  223.       and weak (overridden) callbacks are used.
  224.  
  225.      *** DAC HAL driver macros list ***
  226.      =============================================
  227.      [..]
  228.        Below the list of most used macros in DAC HAL driver.
  229.  
  230.       (+) __HAL_DAC_ENABLE : Enable the DAC peripheral (For STM32F100x devices with specific feature: DMA underrun)
  231.       (+) __HAL_DAC_DISABLE : Disable the DAC peripheral (For STM32F100x devices with specific feature: DMA underrun)
  232.       (+) __HAL_DAC_CLEAR_FLAG: Clear the DAC's pending flags (For STM32F100x devices with specific feature: DMA underrun)
  233.       (+) __HAL_DAC_GET_FLAG: Get the selected DAC's flag status (For STM32F100x devices with specific feature: DMA underrun)
  234.  
  235.      [..]
  236.       (@) You can refer to the DAC HAL driver header file for more useful macros
  237.  
  238. @endverbatim
  239.   ******************************************************************************
  240.   */
  241.  
  242. /* Includes ------------------------------------------------------------------*/
  243. #include "stm32f1xx_hal.h"
  244.  
  245. /** @addtogroup STM32F1xx_HAL_Driver
  246.   * @{
  247.   */
  248.  
  249. #ifdef HAL_DAC_MODULE_ENABLED
  250. #if defined(DAC)
  251.  
  252. /** @defgroup DAC DAC
  253.   * @brief DAC driver modules
  254.   * @{
  255.   */
  256.  
  257. /* Private typedef -----------------------------------------------------------*/
  258. /* Private define ------------------------------------------------------------*/
  259. /* Private constants ---------------------------------------------------------*/
  260. /* Private macro -------------------------------------------------------------*/
  261. /* Private variables ---------------------------------------------------------*/
  262. /* Private function prototypes -----------------------------------------------*/
  263. /* Exported functions -------------------------------------------------------*/
  264.  
  265. /** @defgroup DAC_Exported_Functions DAC Exported Functions
  266.   * @{
  267.   */
  268.  
  269. /** @defgroup DAC_Exported_Functions_Group1 Initialization and de-initialization functions
  270.   *  @brief    Initialization and Configuration functions
  271.   *
  272. @verbatim
  273.   ==============================================================================
  274.               ##### Initialization and de-initialization functions #####
  275.   ==============================================================================
  276.     [..]  This section provides functions allowing to:
  277.       (+) Initialize and configure the DAC.
  278.       (+) De-initialize the DAC.
  279.  
  280. @endverbatim
  281.   * @{
  282.   */
  283.  
  284. /**
  285.   * @brief  Initialize the DAC peripheral according to the specified parameters
  286.   *         in the DAC_InitStruct and initialize the associated handle.
  287.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  288.   *         the configuration information for the specified DAC.
  289.   * @retval HAL status
  290.   */
  291. HAL_StatusTypeDef HAL_DAC_Init(DAC_HandleTypeDef *hdac)
  292. {
  293.   /* Check the DAC peripheral handle */
  294.   if (hdac == NULL)
  295.   {
  296.     return HAL_ERROR;
  297.   }
  298.   /* Check the parameters */
  299.   assert_param(IS_DAC_ALL_INSTANCE(hdac->Instance));
  300.  
  301.   if (hdac->State == HAL_DAC_STATE_RESET)
  302.   {
  303. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  304.     /* Init the DAC Callback settings */
  305.     hdac->ConvCpltCallbackCh1           = HAL_DAC_ConvCpltCallbackCh1;
  306.     hdac->ConvHalfCpltCallbackCh1       = HAL_DAC_ConvHalfCpltCallbackCh1;
  307.     hdac->ErrorCallbackCh1              = HAL_DAC_ErrorCallbackCh1;
  308.     hdac->DMAUnderrunCallbackCh1        = HAL_DAC_DMAUnderrunCallbackCh1;
  309.  
  310.     hdac->ConvCpltCallbackCh2           = HAL_DACEx_ConvCpltCallbackCh2;
  311.     hdac->ConvHalfCpltCallbackCh2       = HAL_DACEx_ConvHalfCpltCallbackCh2;
  312.     hdac->ErrorCallbackCh2              = HAL_DACEx_ErrorCallbackCh2;
  313.     hdac->DMAUnderrunCallbackCh2        = HAL_DACEx_DMAUnderrunCallbackCh2;
  314.  
  315.     if (hdac->MspInitCallback == NULL)
  316.     {
  317.       hdac->MspInitCallback             = HAL_DAC_MspInit;
  318.     }
  319. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  320.  
  321.     /* Allocate lock resource and initialize it */
  322.     hdac->Lock = HAL_UNLOCKED;
  323.  
  324. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  325.     /* Init the low level hardware */
  326.     hdac->MspInitCallback(hdac);
  327. #else
  328.     /* Init the low level hardware */
  329.     HAL_DAC_MspInit(hdac);
  330. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  331.   }
  332.  
  333.   /* Initialize the DAC state*/
  334.   hdac->State = HAL_DAC_STATE_BUSY;
  335.  
  336.   /* Set DAC error code to none */
  337.   hdac->ErrorCode = HAL_DAC_ERROR_NONE;
  338.  
  339.   /* Initialize the DAC state*/
  340.   hdac->State = HAL_DAC_STATE_READY;
  341.  
  342.   /* Return function status */
  343.   return HAL_OK;
  344. }
  345.  
  346. /**
  347.   * @brief  Deinitialize the DAC peripheral registers to their default reset values.
  348.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  349.   *         the configuration information for the specified DAC.
  350.   * @retval HAL status
  351.   */
  352. HAL_StatusTypeDef HAL_DAC_DeInit(DAC_HandleTypeDef *hdac)
  353. {
  354.   /* Check the DAC peripheral handle */
  355.   if (hdac == NULL)
  356.   {
  357.     return HAL_ERROR;
  358.   }
  359.  
  360.   /* Check the parameters */
  361.   assert_param(IS_DAC_ALL_INSTANCE(hdac->Instance));
  362.  
  363.   /* Change DAC state */
  364.   hdac->State = HAL_DAC_STATE_BUSY;
  365.  
  366. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  367.   if (hdac->MspDeInitCallback == NULL)
  368.   {
  369.     hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  370.   }
  371.   /* DeInit the low level hardware */
  372.   hdac->MspDeInitCallback(hdac);
  373. #else
  374.   /* DeInit the low level hardware */
  375.   HAL_DAC_MspDeInit(hdac);
  376. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  377.  
  378.   /* Set DAC error code to none */
  379.   hdac->ErrorCode = HAL_DAC_ERROR_NONE;
  380.  
  381.   /* Change DAC state */
  382.   hdac->State = HAL_DAC_STATE_RESET;
  383.  
  384.   /* Release Lock */
  385.   __HAL_UNLOCK(hdac);
  386.  
  387.   /* Return function status */
  388.   return HAL_OK;
  389. }
  390.  
  391. /**
  392.   * @brief  Initialize the DAC MSP.
  393.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  394.   *         the configuration information for the specified DAC.
  395.   * @retval None
  396.   */
  397. __weak void HAL_DAC_MspInit(DAC_HandleTypeDef *hdac)
  398. {
  399.   /* Prevent unused argument(s) compilation warning */
  400.   UNUSED(hdac);
  401.  
  402.   /* NOTE : This function should not be modified, when the callback is needed,
  403.             the HAL_DAC_MspInit could be implemented in the user file
  404.    */
  405. }
  406.  
  407. /**
  408.   * @brief  DeInitialize the DAC MSP.
  409.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  410.   *         the configuration information for the specified DAC.
  411.   * @retval None
  412.   */
  413. __weak void HAL_DAC_MspDeInit(DAC_HandleTypeDef *hdac)
  414. {
  415.   /* Prevent unused argument(s) compilation warning */
  416.   UNUSED(hdac);
  417.  
  418.   /* NOTE : This function should not be modified, when the callback is needed,
  419.             the HAL_DAC_MspDeInit could be implemented in the user file
  420.    */
  421. }
  422.  
  423. /**
  424.   * @}
  425.   */
  426.  
  427. /** @defgroup DAC_Exported_Functions_Group2 IO operation functions
  428.   *  @brief    IO operation functions
  429.   *
  430. @verbatim
  431.   ==============================================================================
  432.              ##### IO operation functions #####
  433.   ==============================================================================
  434.     [..]  This section provides functions allowing to:
  435.       (+) Start conversion.
  436.       (+) Stop conversion.
  437.       (+) Start conversion and enable DMA transfer.
  438.       (+) Stop conversion and disable DMA transfer.
  439.       (+) Get result of conversion.
  440.  
  441. @endverbatim
  442.   * @{
  443.   */
  444.  
  445. /**
  446.   * @brief  Enables DAC and starts conversion of channel.
  447.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  448.   *         the configuration information for the specified DAC.
  449.   * @param  Channel The selected DAC channel.
  450.   *          This parameter can be one of the following values:
  451.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  452.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  453.   * @retval HAL status
  454.   */
  455. HAL_StatusTypeDef HAL_DAC_Start(DAC_HandleTypeDef *hdac, uint32_t Channel)
  456. {
  457.   /* Check the DAC peripheral handle */
  458.   if (hdac == NULL)
  459.   {
  460.     return HAL_ERROR;
  461.   }
  462.  
  463.   /* Check the parameters */
  464.   assert_param(IS_DAC_CHANNEL(Channel));
  465.  
  466.   /* Process locked */
  467.   __HAL_LOCK(hdac);
  468.  
  469.   /* Change DAC state */
  470.   hdac->State = HAL_DAC_STATE_BUSY;
  471.  
  472.   /* Enable the Peripheral */
  473.   __HAL_DAC_ENABLE(hdac, Channel);
  474.  
  475.   if (Channel == DAC_CHANNEL_1)
  476.   {
  477.     /* Check if software trigger enabled */
  478.     if ((hdac->Instance->CR & (DAC_CR_TEN1 | DAC_CR_TSEL1)) == DAC_TRIGGER_SOFTWARE)
  479.     {
  480.       /* Enable the selected DAC software conversion */
  481.       SET_BIT(hdac->Instance->SWTRIGR, DAC_SWTRIGR_SWTRIG1);
  482.     }
  483.   }
  484.  
  485.   else
  486.   {
  487.     /* Check if software trigger enabled */
  488.     if ((hdac->Instance->CR & (DAC_CR_TEN2 | DAC_CR_TSEL2)) == (DAC_TRIGGER_SOFTWARE << (Channel & 0x10UL)))
  489.     {
  490.       /* Enable the selected DAC software conversion*/
  491.       SET_BIT(hdac->Instance->SWTRIGR, DAC_SWTRIGR_SWTRIG2);
  492.     }
  493.   }
  494.  
  495.  
  496.   /* Change DAC state */
  497.   hdac->State = HAL_DAC_STATE_READY;
  498.  
  499.   /* Process unlocked */
  500.   __HAL_UNLOCK(hdac);
  501.  
  502.   /* Return function status */
  503.   return HAL_OK;
  504. }
  505.  
  506. /**
  507.   * @brief  Disables DAC and stop conversion of channel.
  508.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  509.   *         the configuration information for the specified DAC.
  510.   * @param  Channel The selected DAC channel.
  511.   *          This parameter can be one of the following values:
  512.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  513.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  514.   * @retval HAL status
  515.   */
  516. HAL_StatusTypeDef HAL_DAC_Stop(DAC_HandleTypeDef *hdac, uint32_t Channel)
  517. {
  518.   /* Check the DAC peripheral handle */
  519.   if (hdac == NULL)
  520.   {
  521.     return HAL_ERROR;
  522.   }
  523.  
  524.   /* Check the parameters */
  525.   assert_param(IS_DAC_CHANNEL(Channel));
  526.  
  527.   /* Disable the Peripheral */
  528.   __HAL_DAC_DISABLE(hdac, Channel);
  529.  
  530.   /* Change DAC state */
  531.   hdac->State = HAL_DAC_STATE_READY;
  532.  
  533.   /* Return function status */
  534.   return HAL_OK;
  535. }
  536.  
  537. /**
  538.   * @brief  Enables DAC and starts conversion of channel.
  539.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  540.   *         the configuration information for the specified DAC.
  541.   * @param  Channel The selected DAC channel.
  542.   *          This parameter can be one of the following values:
  543.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  544.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  545.   * @param  pData The source Buffer address.
  546.   * @param  Length The length of data to be transferred from memory to DAC peripheral
  547.   * @param  Alignment Specifies the data alignment for DAC channel.
  548.   *          This parameter can be one of the following values:
  549.   *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
  550.   *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
  551.   *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
  552.   * @retval HAL status
  553.   */
  554. HAL_StatusTypeDef HAL_DAC_Start_DMA(DAC_HandleTypeDef *hdac, uint32_t Channel, const uint32_t *pData, uint32_t Length,
  555.                                     uint32_t Alignment)
  556. {
  557.   HAL_StatusTypeDef status;
  558.   uint32_t tmpreg;
  559.  
  560.   /* Check the DAC peripheral handle */
  561.   if (hdac == NULL)
  562.   {
  563.     return HAL_ERROR;
  564.   }
  565.  
  566.   /* Check the parameters */
  567.   assert_param(IS_DAC_CHANNEL(Channel));
  568.   assert_param(IS_DAC_ALIGN(Alignment));
  569.  
  570.   /* Process locked */
  571.   __HAL_LOCK(hdac);
  572.  
  573.   /* Change DAC state */
  574.   hdac->State = HAL_DAC_STATE_BUSY;
  575.  
  576.   if (Channel == DAC_CHANNEL_1)
  577.   {
  578.     /* Set the DMA transfer complete callback for channel1 */
  579.     hdac->DMA_Handle1->XferCpltCallback = DAC_DMAConvCpltCh1;
  580.  
  581.     /* Set the DMA half transfer complete callback for channel1 */
  582.     hdac->DMA_Handle1->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh1;
  583.  
  584.     /* Set the DMA error callback for channel1 */
  585.     hdac->DMA_Handle1->XferErrorCallback = DAC_DMAErrorCh1;
  586.  
  587.     /* Enable the selected DAC channel1 DMA request */
  588.     SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN1);
  589.  
  590.     /* Case of use of channel 1 */
  591.     switch (Alignment)
  592.     {
  593.       case DAC_ALIGN_12B_R:
  594.         /* Get DHR12R1 address */
  595.         tmpreg = (uint32_t)&hdac->Instance->DHR12R1;
  596.         break;
  597.       case DAC_ALIGN_12B_L:
  598.         /* Get DHR12L1 address */
  599.         tmpreg = (uint32_t)&hdac->Instance->DHR12L1;
  600.         break;
  601.       default: /* case DAC_ALIGN_8B_R */
  602.         /* Get DHR8R1 address */
  603.         tmpreg = (uint32_t)&hdac->Instance->DHR8R1;
  604.         break;
  605.     }
  606.   }
  607.  
  608.   else
  609.   {
  610.     /* Set the DMA transfer complete callback for channel2 */
  611.     hdac->DMA_Handle2->XferCpltCallback = DAC_DMAConvCpltCh2;
  612.  
  613.     /* Set the DMA half transfer complete callback for channel2 */
  614.     hdac->DMA_Handle2->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh2;
  615.  
  616.     /* Set the DMA error callback for channel2 */
  617.     hdac->DMA_Handle2->XferErrorCallback = DAC_DMAErrorCh2;
  618.  
  619.     /* Enable the selected DAC channel2 DMA request */
  620.     SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN2);
  621.  
  622.     /* Case of use of channel 2 */
  623.     switch (Alignment)
  624.     {
  625.       case DAC_ALIGN_12B_R:
  626.         /* Get DHR12R2 address */
  627.         tmpreg = (uint32_t)&hdac->Instance->DHR12R2;
  628.         break;
  629.       case DAC_ALIGN_12B_L:
  630.         /* Get DHR12L2 address */
  631.         tmpreg = (uint32_t)&hdac->Instance->DHR12L2;
  632.         break;
  633.       default: /* case DAC_ALIGN_8B_R */
  634.         /* Get DHR8R2 address */
  635.         tmpreg = (uint32_t)&hdac->Instance->DHR8R2;
  636.         break;
  637.     }
  638.   }
  639.  
  640.   if (Channel == DAC_CHANNEL_1)
  641.   {
  642. #if defined(DAC_CR_DMAUDRIE1)
  643.     /* Enable the DAC DMA underrun interrupt */
  644.     __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR1);
  645. #endif /* DAC_CR_DMAUDRIE1 */
  646.  
  647.     /* Enable the DMA Stream */
  648.     status = HAL_DMA_Start_IT(hdac->DMA_Handle1, (uint32_t)pData, tmpreg, Length);
  649.   }
  650.  
  651.   else
  652.   {
  653. #if defined(DAC_CR_DMAUDRIE2)
  654.     /* Enable the DAC DMA underrun interrupt */
  655.     __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR2);
  656. #endif /* DAC_CR_DMAUDRIE2 */
  657.  
  658.     /* Enable the DMA Stream */
  659.     status = HAL_DMA_Start_IT(hdac->DMA_Handle2, (uint32_t)pData, tmpreg, Length);
  660.   }
  661.  
  662.  
  663.   /* Process Unlocked */
  664.   __HAL_UNLOCK(hdac);
  665.  
  666.   if (status == HAL_OK)
  667.   {
  668.     /* Enable the Peripheral */
  669.     __HAL_DAC_ENABLE(hdac, Channel);
  670.   }
  671.   else
  672.   {
  673.     hdac->ErrorCode |= HAL_DAC_ERROR_DMA;
  674.   }
  675.  
  676.   /* Return function status */
  677.   return status;
  678. }
  679.  
  680. /**
  681.   * @brief  Disables DAC and stop conversion of channel.
  682.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  683.   *         the configuration information for the specified DAC.
  684.   * @param  Channel The selected DAC channel.
  685.   *          This parameter can be one of the following values:
  686.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  687.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  688.   * @retval HAL status
  689.   */
  690. HAL_StatusTypeDef HAL_DAC_Stop_DMA(DAC_HandleTypeDef *hdac, uint32_t Channel)
  691. {
  692.   /* Check the DAC peripheral handle */
  693.   if (hdac == NULL)
  694.   {
  695.     return HAL_ERROR;
  696.   }
  697.  
  698.   /* Check the parameters */
  699.   assert_param(IS_DAC_CHANNEL(Channel));
  700.  
  701.   /* Disable the selected DAC channel DMA request */
  702.   hdac->Instance->CR &= ~(DAC_CR_DMAEN1 << (Channel & 0x10UL));
  703.  
  704.   /* Disable the Peripheral */
  705.   __HAL_DAC_DISABLE(hdac, Channel);
  706.  
  707.   /* Disable the DMA Stream */
  708.  
  709.   /* Channel1 is used */
  710.   if (Channel == DAC_CHANNEL_1)
  711.   {
  712.     /* Disable the DMA Stream */
  713.     (void)HAL_DMA_Abort(hdac->DMA_Handle1);
  714.  
  715. #if defined(DAC_CR_DMAUDRIE1)
  716.     /* Disable the DAC DMA underrun interrupt */
  717.     __HAL_DAC_DISABLE_IT(hdac, DAC_IT_DMAUDR1);
  718. #endif /* DAC_CR_DMAUDRIE1 */
  719.   }
  720.  
  721.   else /* Channel2 is used for */
  722.   {
  723.     /* Disable the DMA Stream */
  724.     (void)HAL_DMA_Abort(hdac->DMA_Handle2);
  725.  
  726. #if defined(DAC_CR_DMAUDRIE2)
  727.     /* Disable the DAC DMA underrun interrupt */
  728.     __HAL_DAC_DISABLE_IT(hdac, DAC_IT_DMAUDR2);
  729. #endif /* DAC_CR_DMAUDRIE2 */
  730.   }
  731.  
  732.  
  733.   /* Change DAC state */
  734.   hdac->State = HAL_DAC_STATE_READY;
  735.  
  736.   /* Return function status */
  737.   return HAL_OK;
  738. }
  739.  
  740. /**
  741.   * @brief  Handles DAC interrupt request
  742.   *         This function uses the interruption of DMA
  743.   *         underrun.
  744.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  745.   *         the configuration information for the specified DAC.
  746.   * @retval None
  747.   */
  748. void HAL_DAC_IRQHandler(DAC_HandleTypeDef *hdac)
  749. {
  750. #if !defined(DAC_SR_DMAUDR1) && !defined(DAC_SR_DMAUDR2)
  751.   UNUSED(hdac);
  752. #else
  753.   uint32_t itsource = hdac->Instance->CR;
  754.   uint32_t itflag   = hdac->Instance->SR;
  755. #endif /* !DAC_SR_DMAUDR1 && !DAC_SR_DMAUDR2 */
  756.  
  757. #if defined(DAC_SR_DMAUDR1)
  758.   if ((itsource & DAC_IT_DMAUDR1) == DAC_IT_DMAUDR1)
  759.   {
  760.     /* Check underrun flag of DAC channel 1 */
  761.     if ((itflag & DAC_FLAG_DMAUDR1) == DAC_FLAG_DMAUDR1)
  762.     {
  763.       /* Change DAC state to error state */
  764.       hdac->State = HAL_DAC_STATE_ERROR;
  765.  
  766.       /* Set DAC error code to channel1 DMA underrun error */
  767.       SET_BIT(hdac->ErrorCode, HAL_DAC_ERROR_DMAUNDERRUNCH1);
  768.  
  769.       /* Clear the underrun flag */
  770.       __HAL_DAC_CLEAR_FLAG(hdac, DAC_FLAG_DMAUDR1);
  771.  
  772.       /* Disable the selected DAC channel1 DMA request */
  773.       __HAL_DAC_DISABLE_IT(hdac, DAC_CR_DMAEN1);
  774.  
  775.       /* Error callback */
  776. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  777.       hdac->DMAUnderrunCallbackCh1(hdac);
  778. #else
  779.       HAL_DAC_DMAUnderrunCallbackCh1(hdac);
  780. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  781.     }
  782.   }
  783. #endif /* DAC_SR_DMAUDR1 */
  784.  
  785. #if defined(DAC_SR_DMAUDR2)
  786.   if ((itsource & DAC_IT_DMAUDR2) == DAC_IT_DMAUDR2)
  787.   {
  788.     /* Check underrun flag of DAC channel 2 */
  789.     if ((itflag & DAC_FLAG_DMAUDR2) == DAC_FLAG_DMAUDR2)
  790.     {
  791.       /* Change DAC state to error state */
  792.       hdac->State = HAL_DAC_STATE_ERROR;
  793.  
  794.       /* Set DAC error code to channel2 DMA underrun error */
  795.       SET_BIT(hdac->ErrorCode, HAL_DAC_ERROR_DMAUNDERRUNCH2);
  796.  
  797.       /* Clear the underrun flag */
  798.       __HAL_DAC_CLEAR_FLAG(hdac, DAC_FLAG_DMAUDR2);
  799.  
  800.       /* Disable the selected DAC channel2 DMA request */
  801.       __HAL_DAC_DISABLE_IT(hdac,  DAC_CR_DMAEN2);
  802.  
  803.       /* Error callback */
  804. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  805.       hdac->DMAUnderrunCallbackCh2(hdac);
  806. #else
  807.       HAL_DACEx_DMAUnderrunCallbackCh2(hdac);
  808. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  809.     }
  810.   }
  811. #endif /* DAC_SR_DMAUDR2 */
  812. }
  813.  
  814. /**
  815.   * @brief  Set the specified data holding register value for DAC channel.
  816.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  817.   *         the configuration information for the specified DAC.
  818.   * @param  Channel The selected DAC channel.
  819.   *          This parameter can be one of the following values:
  820.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  821.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  822.   * @param  Alignment Specifies the data alignment.
  823.   *          This parameter can be one of the following values:
  824.   *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
  825.   *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
  826.   *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
  827.   * @param  Data Data to be loaded in the selected data holding register.
  828.   * @retval HAL status
  829.   */
  830. HAL_StatusTypeDef HAL_DAC_SetValue(DAC_HandleTypeDef *hdac, uint32_t Channel, uint32_t Alignment, uint32_t Data)
  831. {
  832.   __IO uint32_t tmp = 0UL;
  833.  
  834.   /* Check the DAC peripheral handle */
  835.   if (hdac == NULL)
  836.   {
  837.     return HAL_ERROR;
  838.   }
  839.  
  840.   /* Check the parameters */
  841.   assert_param(IS_DAC_CHANNEL(Channel));
  842.   assert_param(IS_DAC_ALIGN(Alignment));
  843.   assert_param(IS_DAC_DATA(Data));
  844.  
  845.   tmp = (uint32_t)hdac->Instance;
  846.   if (Channel == DAC_CHANNEL_1)
  847.   {
  848.     tmp += DAC_DHR12R1_ALIGNMENT(Alignment);
  849.   }
  850.  
  851.   else
  852.   {
  853.     tmp += DAC_DHR12R2_ALIGNMENT(Alignment);
  854.   }
  855.  
  856.  
  857.   /* Set the DAC channel selected data holding register */
  858.   *(__IO uint32_t *) tmp = Data;
  859.  
  860.   /* Return function status */
  861.   return HAL_OK;
  862. }
  863.  
  864. /**
  865.   * @brief  Conversion complete callback in non-blocking mode for Channel1
  866.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  867.   *         the configuration information for the specified DAC.
  868.   * @retval None
  869.   */
  870. __weak void HAL_DAC_ConvCpltCallbackCh1(DAC_HandleTypeDef *hdac)
  871. {
  872.   /* Prevent unused argument(s) compilation warning */
  873.   UNUSED(hdac);
  874.  
  875.   /* NOTE : This function should not be modified, when the callback is needed,
  876.             the HAL_DAC_ConvCpltCallbackCh1 could be implemented in the user file
  877.    */
  878. }
  879.  
  880. /**
  881.   * @brief  Conversion half DMA transfer callback in non-blocking mode for Channel1
  882.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  883.   *         the configuration information for the specified DAC.
  884.   * @retval None
  885.   */
  886. __weak void HAL_DAC_ConvHalfCpltCallbackCh1(DAC_HandleTypeDef *hdac)
  887. {
  888.   /* Prevent unused argument(s) compilation warning */
  889.   UNUSED(hdac);
  890.  
  891.   /* NOTE : This function should not be modified, when the callback is needed,
  892.             the HAL_DAC_ConvHalfCpltCallbackCh1 could be implemented in the user file
  893.    */
  894. }
  895.  
  896. /**
  897.   * @brief  Error DAC callback for Channel1.
  898.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  899.   *         the configuration information for the specified DAC.
  900.   * @retval None
  901.   */
  902. __weak void HAL_DAC_ErrorCallbackCh1(DAC_HandleTypeDef *hdac)
  903. {
  904.   /* Prevent unused argument(s) compilation warning */
  905.   UNUSED(hdac);
  906.  
  907.   /* NOTE : This function should not be modified, when the callback is needed,
  908.             the HAL_DAC_ErrorCallbackCh1 could be implemented in the user file
  909.    */
  910. }
  911.  
  912. /**
  913.   * @brief  DMA underrun DAC callback for channel1.
  914.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  915.   *         the configuration information for the specified DAC.
  916.   * @retval None
  917.   */
  918. __weak void HAL_DAC_DMAUnderrunCallbackCh1(DAC_HandleTypeDef *hdac)
  919. {
  920.   /* Prevent unused argument(s) compilation warning */
  921.   UNUSED(hdac);
  922.  
  923.   /* NOTE : This function should not be modified, when the callback is needed,
  924.             the HAL_DAC_DMAUnderrunCallbackCh1 could be implemented in the user file
  925.    */
  926. }
  927.  
  928. /**
  929.   * @}
  930.   */
  931.  
  932. /** @defgroup DAC_Exported_Functions_Group3 Peripheral Control functions
  933.   *  @brief    Peripheral Control functions
  934.   *
  935. @verbatim
  936.   ==============================================================================
  937.              ##### Peripheral Control functions #####
  938.   ==============================================================================
  939.     [..]  This section provides functions allowing to:
  940.       (+) Configure channels.
  941.       (+) Set the specified data holding register value for DAC channel.
  942.  
  943. @endverbatim
  944.   * @{
  945.   */
  946.  
  947. /**
  948.   * @brief  Returns the last data output value of the selected DAC channel.
  949.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  950.   *         the configuration information for the specified DAC.
  951.   * @param  Channel The selected DAC channel.
  952.   *          This parameter can be one of the following values:
  953.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  954.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  955.   * @retval The selected DAC channel data output value.
  956.   */
  957. uint32_t HAL_DAC_GetValue(const DAC_HandleTypeDef *hdac, uint32_t Channel)
  958. {
  959.   uint32_t result;
  960.  
  961.   /* Check the DAC peripheral handle */
  962.   if (hdac == NULL)
  963.   {
  964.     return HAL_ERROR;
  965.   }
  966.  
  967.   /* Check the parameters */
  968.   assert_param(IS_DAC_CHANNEL(Channel));
  969.  
  970.   if (Channel == DAC_CHANNEL_1)
  971.   {
  972.     result = hdac->Instance->DOR1;
  973.   }
  974.  
  975.   else
  976.   {
  977.     result = hdac->Instance->DOR2;
  978.   }
  979.  
  980.   /* Returns the DAC channel data output register value */
  981.   return result;
  982. }
  983.  
  984. /**
  985.   * @brief  Configures the selected DAC channel.
  986.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  987.   *         the configuration information for the specified DAC.
  988.   * @param  sConfig DAC configuration structure.
  989.   * @param  Channel The selected DAC channel.
  990.   *          This parameter can be one of the following values:
  991.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  992.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  993.   * @retval HAL status
  994.   */
  995. HAL_StatusTypeDef HAL_DAC_ConfigChannel(DAC_HandleTypeDef *hdac,
  996.                                         const DAC_ChannelConfTypeDef *sConfig, uint32_t Channel)
  997. {
  998.   HAL_StatusTypeDef status = HAL_OK;
  999.   uint32_t tmpreg1;
  1000.   uint32_t tmpreg2;
  1001.  
  1002.   /* Check the DAC peripheral handle and channel configuration struct */
  1003.   if ((hdac == NULL) || (sConfig == NULL))
  1004.   {
  1005.     return HAL_ERROR;
  1006.   }
  1007.  
  1008.   /* Check the DAC parameters */
  1009.   assert_param(IS_DAC_TRIGGER(sConfig->DAC_Trigger));
  1010.   assert_param(IS_DAC_OUTPUT_BUFFER_STATE(sConfig->DAC_OutputBuffer));
  1011.   assert_param(IS_DAC_CHANNEL(Channel));
  1012.  
  1013.   /* Process locked */
  1014.   __HAL_LOCK(hdac);
  1015.  
  1016.   /* Change DAC state */
  1017.   hdac->State = HAL_DAC_STATE_BUSY;
  1018.  
  1019.   /* Get the DAC CR value */
  1020.   tmpreg1 = hdac->Instance->CR;
  1021.   /* Clear BOFFx, TENx, TSELx, WAVEx and MAMPx bits */
  1022.   tmpreg1 &= ~(((uint32_t)(DAC_CR_MAMP1 | DAC_CR_WAVE1 | DAC_CR_TSEL1 | DAC_CR_TEN1 | DAC_CR_BOFF1))
  1023.                << (Channel & 0x10UL));
  1024.   /* Configure for the selected DAC channel: buffer output, trigger */
  1025.   /* Set TSELx and TENx bits according to DAC_Trigger value */
  1026.   /* Set BOFFx bit according to DAC_OutputBuffer value */
  1027.   tmpreg2 = (sConfig->DAC_Trigger | sConfig->DAC_OutputBuffer);
  1028.   /* Calculate CR register value depending on DAC_Channel */
  1029.   tmpreg1 |= tmpreg2 << (Channel & 0x10UL);
  1030.   /* Write to DAC CR */
  1031.   hdac->Instance->CR = tmpreg1;
  1032.   /* Disable wave generation */
  1033.   CLEAR_BIT(hdac->Instance->CR, (DAC_CR_WAVE1 << (Channel & 0x10UL)));
  1034.  
  1035.   /* Change DAC state */
  1036.   hdac->State = HAL_DAC_STATE_READY;
  1037.  
  1038.   /* Process unlocked */
  1039.   __HAL_UNLOCK(hdac);
  1040.  
  1041.   /* Return function status */
  1042.   return status;
  1043. }
  1044.  
  1045. /**
  1046.   * @}
  1047.   */
  1048.  
  1049. /** @defgroup DAC_Exported_Functions_Group4 Peripheral State and Errors functions
  1050.   *  @brief   Peripheral State and Errors functions
  1051.   *
  1052. @verbatim
  1053.   ==============================================================================
  1054.             ##### Peripheral State and Errors functions #####
  1055.   ==============================================================================
  1056.     [..]
  1057.     This subsection provides functions allowing to
  1058.       (+) Check the DAC state.
  1059.       (+) Check the DAC Errors.
  1060.  
  1061. @endverbatim
  1062.   * @{
  1063.   */
  1064.  
  1065. /**
  1066.   * @brief  return the DAC handle state
  1067.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  1068.   *         the configuration information for the specified DAC.
  1069.   * @retval HAL state
  1070.   */
  1071. HAL_DAC_StateTypeDef HAL_DAC_GetState(const DAC_HandleTypeDef *hdac)
  1072. {
  1073.   /* Return DAC handle state */
  1074.   return hdac->State;
  1075. }
  1076.  
  1077.  
  1078. /**
  1079.   * @brief  Return the DAC error code
  1080.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  1081.   *         the configuration information for the specified DAC.
  1082.   * @retval DAC Error Code
  1083.   */
  1084. uint32_t HAL_DAC_GetError(const DAC_HandleTypeDef *hdac)
  1085. {
  1086.   return hdac->ErrorCode;
  1087. }
  1088.  
  1089. /**
  1090.   * @}
  1091.   */
  1092.  
  1093. /**
  1094.   * @}
  1095.   */
  1096.  
  1097. /** @addtogroup DAC_Exported_Functions
  1098.   * @{
  1099.   */
  1100.  
  1101. /** @addtogroup DAC_Exported_Functions_Group1
  1102.   * @{
  1103.   */
  1104. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1105. /**
  1106.   * @brief  Register a User DAC Callback
  1107.   *         To be used instead of the weak (overridden) predefined callback
  1108.   * @note   The HAL_DAC_RegisterCallback() may be called before HAL_DAC_Init() in HAL_DAC_STATE_RESET to register
  1109.   *         callbacks for HAL_DAC_MSPINIT_CB_ID and HAL_DAC_MSPDEINIT_CB_ID
  1110.   * @param  hdac DAC handle
  1111.   * @param  CallbackID ID of the callback to be registered
  1112.   *         This parameter can be one of the following values:
  1113.   *          @arg @ref HAL_DAC_ERROR_INVALID_CALLBACK   DAC Error Callback ID
  1114.   *          @arg @ref HAL_DAC_CH1_COMPLETE_CB_ID       DAC CH1 Complete Callback ID
  1115.   *          @arg @ref HAL_DAC_CH1_HALF_COMPLETE_CB_ID  DAC CH1 Half Complete Callback ID
  1116.   *          @arg @ref HAL_DAC_CH1_ERROR_ID             DAC CH1 Error Callback ID
  1117.   *          @arg @ref HAL_DAC_CH1_UNDERRUN_CB_ID       DAC CH1 UnderRun Callback ID
  1118.   *          @arg @ref HAL_DAC_CH2_COMPLETE_CB_ID       DAC CH2 Complete Callback ID
  1119.   *          @arg @ref HAL_DAC_CH2_HALF_COMPLETE_CB_ID  DAC CH2 Half Complete Callback ID
  1120.   *          @arg @ref HAL_DAC_CH2_ERROR_ID             DAC CH2 Error Callback ID
  1121.   *          @arg @ref HAL_DAC_CH2_UNDERRUN_CB_ID       DAC CH2 UnderRun Callback ID
  1122.   *          @arg @ref HAL_DAC_MSPINIT_CB_ID            DAC MSP Init Callback ID
  1123.   *          @arg @ref HAL_DAC_MSPDEINIT_CB_ID          DAC MSP DeInit Callback ID
  1124.   *
  1125.   * @param  pCallback pointer to the Callback function
  1126.   * @retval status
  1127.   */
  1128. HAL_StatusTypeDef HAL_DAC_RegisterCallback(DAC_HandleTypeDef *hdac, HAL_DAC_CallbackIDTypeDef CallbackID,
  1129.                                            pDAC_CallbackTypeDef pCallback)
  1130. {
  1131.   HAL_StatusTypeDef status = HAL_OK;
  1132.  
  1133.   /* Check the DAC peripheral handle */
  1134.   if (hdac == NULL)
  1135.   {
  1136.     return HAL_ERROR;
  1137.   }
  1138.  
  1139.   if (pCallback == NULL)
  1140.   {
  1141.     /* Update the error code */
  1142.     hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1143.     return HAL_ERROR;
  1144.   }
  1145.  
  1146.   if (hdac->State == HAL_DAC_STATE_READY)
  1147.   {
  1148.     switch (CallbackID)
  1149.     {
  1150.       case HAL_DAC_CH1_COMPLETE_CB_ID :
  1151.         hdac->ConvCpltCallbackCh1 = pCallback;
  1152.         break;
  1153.       case HAL_DAC_CH1_HALF_COMPLETE_CB_ID :
  1154.         hdac->ConvHalfCpltCallbackCh1 = pCallback;
  1155.         break;
  1156.       case HAL_DAC_CH1_ERROR_ID :
  1157.         hdac->ErrorCallbackCh1 = pCallback;
  1158.         break;
  1159.       case HAL_DAC_CH1_UNDERRUN_CB_ID :
  1160.         hdac->DMAUnderrunCallbackCh1 = pCallback;
  1161.         break;
  1162.  
  1163.       case HAL_DAC_CH2_COMPLETE_CB_ID :
  1164.         hdac->ConvCpltCallbackCh2 = pCallback;
  1165.         break;
  1166.       case HAL_DAC_CH2_HALF_COMPLETE_CB_ID :
  1167.         hdac->ConvHalfCpltCallbackCh2 = pCallback;
  1168.         break;
  1169.       case HAL_DAC_CH2_ERROR_ID :
  1170.         hdac->ErrorCallbackCh2 = pCallback;
  1171.         break;
  1172.       case HAL_DAC_CH2_UNDERRUN_CB_ID :
  1173.         hdac->DMAUnderrunCallbackCh2 = pCallback;
  1174.         break;
  1175.  
  1176.       case HAL_DAC_MSPINIT_CB_ID :
  1177.         hdac->MspInitCallback = pCallback;
  1178.         break;
  1179.       case HAL_DAC_MSPDEINIT_CB_ID :
  1180.         hdac->MspDeInitCallback = pCallback;
  1181.         break;
  1182.       default :
  1183.         /* Update the error code */
  1184.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1185.         /* update return status */
  1186.         status =  HAL_ERROR;
  1187.         break;
  1188.     }
  1189.   }
  1190.   else if (hdac->State == HAL_DAC_STATE_RESET)
  1191.   {
  1192.     switch (CallbackID)
  1193.     {
  1194.       case HAL_DAC_MSPINIT_CB_ID :
  1195.         hdac->MspInitCallback = pCallback;
  1196.         break;
  1197.       case HAL_DAC_MSPDEINIT_CB_ID :
  1198.         hdac->MspDeInitCallback = pCallback;
  1199.         break;
  1200.       default :
  1201.         /* Update the error code */
  1202.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1203.         /* update return status */
  1204.         status =  HAL_ERROR;
  1205.         break;
  1206.     }
  1207.   }
  1208.   else
  1209.   {
  1210.     /* Update the error code */
  1211.     hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1212.     /* update return status */
  1213.     status =  HAL_ERROR;
  1214.   }
  1215.  
  1216.   return status;
  1217. }
  1218.  
  1219. /**
  1220.   * @brief  Unregister a User DAC Callback
  1221.   *         DAC Callback is redirected to the weak (overridden) predefined callback
  1222.   * @note   The HAL_DAC_UnRegisterCallback() may be called before HAL_DAC_Init() in HAL_DAC_STATE_RESET to un-register
  1223.   *         callbacks for HAL_DAC_MSPINIT_CB_ID and HAL_DAC_MSPDEINIT_CB_ID
  1224.   * @param  hdac DAC handle
  1225.   * @param  CallbackID ID of the callback to be unregistered
  1226.   *         This parameter can be one of the following values:
  1227.   *          @arg @ref HAL_DAC_CH1_COMPLETE_CB_ID          DAC CH1 transfer Complete Callback ID
  1228.   *          @arg @ref HAL_DAC_CH1_HALF_COMPLETE_CB_ID     DAC CH1 Half Complete Callback ID
  1229.   *          @arg @ref HAL_DAC_CH1_ERROR_ID                DAC CH1 Error Callback ID
  1230.   *          @arg @ref HAL_DAC_CH1_UNDERRUN_CB_ID          DAC CH1 UnderRun Callback ID
  1231.   *          @arg @ref HAL_DAC_CH2_COMPLETE_CB_ID          DAC CH2 Complete Callback ID
  1232.   *          @arg @ref HAL_DAC_CH2_HALF_COMPLETE_CB_ID     DAC CH2 Half Complete Callback ID
  1233.   *          @arg @ref HAL_DAC_CH2_ERROR_ID                DAC CH2 Error Callback ID
  1234.   *          @arg @ref HAL_DAC_CH2_UNDERRUN_CB_ID          DAC CH2 UnderRun Callback ID
  1235.   *          @arg @ref HAL_DAC_MSPINIT_CB_ID               DAC MSP Init Callback ID
  1236.   *          @arg @ref HAL_DAC_MSPDEINIT_CB_ID             DAC MSP DeInit Callback ID
  1237.   *          @arg @ref HAL_DAC_ALL_CB_ID                   DAC All callbacks
  1238.   * @retval status
  1239.   */
  1240. HAL_StatusTypeDef HAL_DAC_UnRegisterCallback(DAC_HandleTypeDef *hdac, HAL_DAC_CallbackIDTypeDef CallbackID)
  1241. {
  1242.   HAL_StatusTypeDef status = HAL_OK;
  1243.  
  1244.   /* Check the DAC peripheral handle */
  1245.   if (hdac == NULL)
  1246.   {
  1247.     return HAL_ERROR;
  1248.   }
  1249.  
  1250.   if (hdac->State == HAL_DAC_STATE_READY)
  1251.   {
  1252.     switch (CallbackID)
  1253.     {
  1254.       case HAL_DAC_CH1_COMPLETE_CB_ID :
  1255.         hdac->ConvCpltCallbackCh1 = HAL_DAC_ConvCpltCallbackCh1;
  1256.         break;
  1257.       case HAL_DAC_CH1_HALF_COMPLETE_CB_ID :
  1258.         hdac->ConvHalfCpltCallbackCh1 = HAL_DAC_ConvHalfCpltCallbackCh1;
  1259.         break;
  1260.       case HAL_DAC_CH1_ERROR_ID :
  1261.         hdac->ErrorCallbackCh1 = HAL_DAC_ErrorCallbackCh1;
  1262.         break;
  1263.       case HAL_DAC_CH1_UNDERRUN_CB_ID :
  1264.         hdac->DMAUnderrunCallbackCh1 = HAL_DAC_DMAUnderrunCallbackCh1;
  1265.         break;
  1266.  
  1267.       case HAL_DAC_CH2_COMPLETE_CB_ID :
  1268.         hdac->ConvCpltCallbackCh2 = HAL_DACEx_ConvCpltCallbackCh2;
  1269.         break;
  1270.       case HAL_DAC_CH2_HALF_COMPLETE_CB_ID :
  1271.         hdac->ConvHalfCpltCallbackCh2 = HAL_DACEx_ConvHalfCpltCallbackCh2;
  1272.         break;
  1273.       case HAL_DAC_CH2_ERROR_ID :
  1274.         hdac->ErrorCallbackCh2 = HAL_DACEx_ErrorCallbackCh2;
  1275.         break;
  1276.       case HAL_DAC_CH2_UNDERRUN_CB_ID :
  1277.         hdac->DMAUnderrunCallbackCh2 = HAL_DACEx_DMAUnderrunCallbackCh2;
  1278.         break;
  1279.  
  1280.       case HAL_DAC_MSPINIT_CB_ID :
  1281.         hdac->MspInitCallback = HAL_DAC_MspInit;
  1282.         break;
  1283.       case HAL_DAC_MSPDEINIT_CB_ID :
  1284.         hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  1285.         break;
  1286.       case HAL_DAC_ALL_CB_ID :
  1287.         hdac->ConvCpltCallbackCh1 = HAL_DAC_ConvCpltCallbackCh1;
  1288.         hdac->ConvHalfCpltCallbackCh1 = HAL_DAC_ConvHalfCpltCallbackCh1;
  1289.         hdac->ErrorCallbackCh1 = HAL_DAC_ErrorCallbackCh1;
  1290.         hdac->DMAUnderrunCallbackCh1 = HAL_DAC_DMAUnderrunCallbackCh1;
  1291.  
  1292.         hdac->ConvCpltCallbackCh2 = HAL_DACEx_ConvCpltCallbackCh2;
  1293.         hdac->ConvHalfCpltCallbackCh2 = HAL_DACEx_ConvHalfCpltCallbackCh2;
  1294.         hdac->ErrorCallbackCh2 = HAL_DACEx_ErrorCallbackCh2;
  1295.         hdac->DMAUnderrunCallbackCh2 = HAL_DACEx_DMAUnderrunCallbackCh2;
  1296.  
  1297.         hdac->MspInitCallback = HAL_DAC_MspInit;
  1298.         hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  1299.         break;
  1300.       default :
  1301.         /* Update the error code */
  1302.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1303.         /* update return status */
  1304.         status =  HAL_ERROR;
  1305.         break;
  1306.     }
  1307.   }
  1308.   else if (hdac->State == HAL_DAC_STATE_RESET)
  1309.   {
  1310.     switch (CallbackID)
  1311.     {
  1312.       case HAL_DAC_MSPINIT_CB_ID :
  1313.         hdac->MspInitCallback = HAL_DAC_MspInit;
  1314.         break;
  1315.       case HAL_DAC_MSPDEINIT_CB_ID :
  1316.         hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  1317.         break;
  1318.       default :
  1319.         /* Update the error code */
  1320.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1321.         /* update return status */
  1322.         status =  HAL_ERROR;
  1323.         break;
  1324.     }
  1325.   }
  1326.   else
  1327.   {
  1328.     /* Update the error code */
  1329.     hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1330.     /* update return status */
  1331.     status =  HAL_ERROR;
  1332.   }
  1333.  
  1334.   return status;
  1335. }
  1336. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1337.  
  1338. /**
  1339.   * @}
  1340.   */
  1341.  
  1342. /**
  1343.   * @}
  1344.   */
  1345.  
  1346. /** @addtogroup DAC_Private_Functions
  1347.   * @{
  1348.   */
  1349.  
  1350. /**
  1351.   * @brief  DMA conversion complete callback.
  1352.   * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  1353.   *                the configuration information for the specified DMA module.
  1354.   * @retval None
  1355.   */
  1356. void DAC_DMAConvCpltCh1(DMA_HandleTypeDef *hdma)
  1357. {
  1358.   DAC_HandleTypeDef *hdac = (DAC_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  1359.  
  1360. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1361.   hdac->ConvCpltCallbackCh1(hdac);
  1362. #else
  1363.   HAL_DAC_ConvCpltCallbackCh1(hdac);
  1364. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1365.  
  1366.   hdac->State = HAL_DAC_STATE_READY;
  1367. }
  1368.  
  1369. /**
  1370.   * @brief  DMA half transfer complete callback.
  1371.   * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  1372.   *                the configuration information for the specified DMA module.
  1373.   * @retval None
  1374.   */
  1375. void DAC_DMAHalfConvCpltCh1(DMA_HandleTypeDef *hdma)
  1376. {
  1377.   DAC_HandleTypeDef *hdac = (DAC_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  1378.   /* Conversion complete callback */
  1379. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1380.   hdac->ConvHalfCpltCallbackCh1(hdac);
  1381. #else
  1382.   HAL_DAC_ConvHalfCpltCallbackCh1(hdac);
  1383. #endif  /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1384. }
  1385.  
  1386. /**
  1387.   * @brief  DMA error callback
  1388.   * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  1389.   *                the configuration information for the specified DMA module.
  1390.   * @retval None
  1391.   */
  1392. void DAC_DMAErrorCh1(DMA_HandleTypeDef *hdma)
  1393. {
  1394.   DAC_HandleTypeDef *hdac = (DAC_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  1395.  
  1396.   /* Set DAC error code to DMA error */
  1397.   hdac->ErrorCode |= HAL_DAC_ERROR_DMA;
  1398.  
  1399. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1400.   hdac->ErrorCallbackCh1(hdac);
  1401. #else
  1402.   HAL_DAC_ErrorCallbackCh1(hdac);
  1403. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1404.  
  1405.   hdac->State = HAL_DAC_STATE_READY;
  1406. }
  1407.  
  1408. /**
  1409.   * @}
  1410.   */
  1411.  
  1412. /**
  1413.   * @}
  1414.   */
  1415.  
  1416. #endif /* DAC */
  1417.  
  1418. #endif /* HAL_DAC_MODULE_ENABLED */
  1419. /**
  1420.   * @}
  1421.   */
  1422.