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  1. /**
  2.   ******************************************************************************
  3.   * @file    stm32l1xx_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.   @verbatim
  15.   ==============================================================================
  16.                       ##### DAC Peripheral features #####
  17.   ==============================================================================
  18.     [..]
  19.       *** DAC Channels ***
  20.       ====================
  21.     [..]
  22.     STM32L1 devices integrate two 12-bit Digital Analog Converters
  23.  
  24.     The 2 converters (i.e. channel1 & channel2)
  25.     can be used independently or simultaneously (dual mode):
  26.       (#) DAC channel1 with DAC_OUT1 (PA4) as output or connected to on-chip
  27.           peripherals (ex. timers).
  28.       (#) DAC channel2 with DAC_OUT2 (PA5) as output or connected to on-chip
  29.           peripherals (ex. timers).
  30.  
  31.       *** DAC Triggers ***
  32.       ====================
  33.     [..]
  34.     Digital to Analog conversion can be non-triggered using DAC_TRIGGER_NONE
  35.     and DAC_OUT1/DAC_OUT2 is available once writing to DHRx register.
  36.     [..]
  37.     Digital to Analog conversion can be triggered by:
  38.       (#) External event: EXTI Line 9 (any GPIOx_PIN_9) using DAC_TRIGGER_EXT_IT9.
  39.           The used pin (GPIOx_PIN_9) must be configured in input mode.
  40.  
  41.       (#) Timers TRGO: TIM2, TIM4, TIM6, TIM7, TIM9
  42.           (DAC_TRIGGER_T2_TRGO, DAC_TRIGGER_T4_TRGO...)
  43.  
  44.       (#) Software using DAC_TRIGGER_SOFTWARE
  45.  
  46.       *** DAC Buffer mode feature ***
  47.       ===============================
  48.       [..]
  49.       Each DAC channel integrates an output buffer that can be used to
  50.       reduce the output impedance, and to drive external loads directly
  51.       without having to add an external operational amplifier.
  52.       To enable, the output buffer use
  53.       sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
  54.       [..]
  55.       (@) Refer to the device datasheet for more details about output
  56.           impedance value with and without output buffer.
  57.  
  58.       *** GPIO configurations guidelines ***
  59.       =====================
  60.       [..]
  61.       When a DAC channel is used (ex channel1 on PA4) and the other is not
  62.       (ex channel2 on PA5 is configured in Analog and disabled).
  63.       Channel1 may disturb channel2 as coupling effect.
  64.       Note that there is no coupling on channel2 as soon as channel2 is turned on.
  65.       Coupling on adjacent channel could be avoided as follows:
  66.       when unused PA5 is configured as INPUT PULL-UP or DOWN.
  67.       PA5 is configured in ANALOG just before it is turned on.
  68.  
  69.        *** DAC wave generation feature ***
  70.        ===================================
  71.        [..]
  72.        Both DAC channels can be used to generate
  73.          (#) Noise wave
  74.          (#) Triangle wave
  75.  
  76.        *** DAC data format ***
  77.        =======================
  78.        [..]
  79.        The DAC data format can be:
  80.          (#) 8-bit right alignment using DAC_ALIGN_8B_R
  81.          (#) 12-bit left alignment using DAC_ALIGN_12B_L
  82.          (#) 12-bit right alignment using DAC_ALIGN_12B_R
  83.  
  84.        *** DAC data value to voltage correspondence ***
  85.        ================================================
  86.        [..]
  87.        The analog output voltage on each DAC channel pin is determined
  88.        by the following equation:
  89.        [..]
  90.        DAC_OUTx = VREF+ * DOR / 4095
  91.        (+) with  DOR is the Data Output Register
  92.        [..]
  93.           VREF+ is the input voltage reference (refer to the device datasheet)
  94.        [..]
  95.         e.g. To set DAC_OUT1 to 0.7V, use
  96.        (+) Assuming that VREF+ = 3.3V, DAC_OUT1 = (3.3 * 868) / 4095 = 0.7V
  97.  
  98.        *** DMA requests ***
  99.        =====================
  100.        [..]
  101.        A DMA request can be generated when an external trigger (but not a software trigger)
  102.        occurs if DMA1 requests are enabled using HAL_DAC_Start_DMA().
  103.        DMA1 requests are mapped as following:
  104.       (#) DAC channel1 mapped on (no request on STM32L1XX) / DMA1 channel2
  105.       (#) DAC channel2 mapped on (no request on STM32L1XX) / DMA1 channel3
  106.  
  107.      [..]
  108.     (@) For Dual mode and specific signal (Triangle and noise) generation please
  109.         refer to Extended Features Driver description
  110.  
  111.                       ##### How to use this driver #####
  112.   ==============================================================================
  113.     [..]
  114.       (+) DAC APB clock must be enabled to get write access to DAC
  115.           registers using HAL_DAC_Init()
  116.       (+) Configure DAC_OUTx (DAC_OUT1: PA4, DAC_OUT2: PA5) in analog mode.
  117.       (+) Configure the DAC channel using HAL_DAC_ConfigChannel() function.
  118.       (+) Enable the DAC channel using HAL_DAC_Start() or HAL_DAC_Start_DMA() functions.
  119.  
  120.  
  121.      *** Polling mode IO operation ***
  122.      =================================
  123.      [..]
  124.        (+) Start the DAC peripheral using HAL_DAC_Start()
  125.        (+) To read the DAC last data output value, use the HAL_DAC_GetValue() function.
  126.        (+) Stop the DAC peripheral using HAL_DAC_Stop()
  127.  
  128.      *** DMA mode IO operation ***
  129.      ==============================
  130.      [..]
  131.        (+) Start the DAC peripheral using HAL_DAC_Start_DMA(), at this stage the user specify the length
  132.            of data to be transferred at each end of conversion
  133.            First issued trigger will start the conversion of the value previously set by HAL_DAC_SetValue().
  134.        (+) At the middle of data transfer HAL_DAC_ConvHalfCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  135.            function is executed and user can add his own code by customization of function pointer
  136.            HAL_DAC_ConvHalfCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  137.        (+) At The end of data transfer HAL_DAC_ConvCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  138.            function is executed and user can add his own code by customization of function pointer
  139.            HAL_DAC_ConvCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  140.        (+) In case of transfer Error, HAL_DAC_ErrorCallbackCh1() function is executed and user can
  141.             add his own code by customization of function pointer HAL_DAC_ErrorCallbackCh1
  142.        (+) In case of DMA underrun, DAC interruption triggers and execute internal function HAL_DAC_IRQHandler.
  143.            HAL_DAC_DMAUnderrunCallbackCh1() or HAL_DACEx_DMAUnderrunCallbackCh2()
  144.            function is executed and user can add his own code by customization of function pointer
  145.            HAL_DAC_DMAUnderrunCallbackCh1() or HAL_DACEx_DMAUnderrunCallbackCh2() and
  146.            add his own code by customization of function pointer HAL_DAC_ErrorCallbackCh1()
  147.        (+) Stop the DAC peripheral using HAL_DAC_Stop_DMA()
  148.  
  149.     *** Callback registration ***
  150.     =============================================
  151.     [..]
  152.       The compilation define  USE_HAL_DAC_REGISTER_CALLBACKS when set to 1
  153.       allows the user to configure dynamically the driver callbacks.
  154.  
  155.     Use Functions @ref HAL_DAC_RegisterCallback() to register a user callback,
  156.       it allows to register following callbacks:
  157.       (+) ConvCpltCallbackCh1     : callback when a half transfer is completed on Ch1.
  158.       (+) ConvHalfCpltCallbackCh1 : callback when a transfer is completed on Ch1.
  159.       (+) ErrorCallbackCh1        : callback when an error occurs on Ch1.
  160.       (+) DMAUnderrunCallbackCh1  : callback when an underrun error occurs on Ch1.
  161.       (+) ConvCpltCallbackCh2     : callback when a half transfer is completed on Ch2.
  162.       (+) ConvHalfCpltCallbackCh2 : callback when a transfer is completed on Ch2.
  163.       (+) ErrorCallbackCh2        : callback when an error occurs on Ch2.
  164.       (+) DMAUnderrunCallbackCh2  : callback when an underrun error occurs on Ch2.
  165.       (+) MspInitCallback         : DAC MspInit.
  166.       (+) MspDeInitCallback       : DAC MspdeInit.
  167.       This function takes as parameters the HAL peripheral handle, the Callback ID
  168.       and a pointer to the user callback function.
  169.  
  170.     Use function @ref HAL_DAC_UnRegisterCallback() to reset a callback to the default
  171.       weak (surcharged) function. It allows to reset following callbacks:
  172.       (+) ConvCpltCallbackCh1     : callback when a half transfer is completed on Ch1.
  173.       (+) ConvHalfCpltCallbackCh1 : callback when a transfer is completed on Ch1.
  174.       (+) ErrorCallbackCh1        : callback when an error occurs on Ch1.
  175.       (+) DMAUnderrunCallbackCh1  : callback when an underrun error occurs on Ch1.
  176.       (+) ConvCpltCallbackCh2     : callback when a half transfer is completed on Ch2.
  177.       (+) ConvHalfCpltCallbackCh2 : callback when a transfer is completed on Ch2.
  178.       (+) ErrorCallbackCh2        : callback when an error occurs on Ch2.
  179.       (+) DMAUnderrunCallbackCh2  : callback when an underrun error occurs on Ch2.
  180.       (+) MspInitCallback         : DAC MspInit.
  181.       (+) MspDeInitCallback       : DAC MspdeInit.
  182.       (+) All Callbacks
  183.       This function) takes as parameters the HAL peripheral handle and the Callback ID.
  184.  
  185.       By default, after the @ref HAL_DAC_Init and if the state is HAL_DAC_STATE_RESET
  186.       all callbacks are reset to the corresponding legacy weak (surcharged) functions.
  187.       Exception done for MspInit and MspDeInit callbacks that are respectively
  188.       reset to the legacy weak (surcharged) functions in the @ref HAL_DAC_Init
  189.       and @ref  HAL_DAC_DeInit only when these callbacks are null (not registered beforehand).
  190.       If not, MspInit or MspDeInit are not null, the @ref HAL_DAC_Init and @ref HAL_DAC_DeInit
  191.       keep and use the user MspInit/MspDeInit callbacks (registered beforehand)
  192.  
  193.       Callbacks can be registered/unregistered in READY state only.
  194.       Exception done for MspInit/MspDeInit callbacks that can be registered/unregistered
  195.       in READY or RESET state, thus registered (user) MspInit/DeInit callbacks can be used
  196.       during the Init/DeInit.
  197.       In that case first register the MspInit/MspDeInit user callbacks
  198.       using @ref HAL_DAC_RegisterCallback before calling @ref HAL_DAC_DeInit
  199.       or @ref HAL_DAC_Init function.
  200.  
  201.       When The compilation define USE_HAL_DAC_REGISTER_CALLBACKS is set to 0 or
  202.       not defined, the callback registering feature is not available
  203.       and weak (surcharged) callbacks are used.
  204.  
  205.      *** DAC HAL driver macros list ***
  206.      =============================================
  207.      [..]
  208.        Below the list of most used macros in DAC HAL driver.
  209.  
  210.       (+) __HAL_DAC_ENABLE : Enable the DAC peripheral
  211.       (+) __HAL_DAC_DISABLE : Disable the DAC peripheral
  212.       (+) __HAL_DAC_CLEAR_FLAG: Clear the DAC's pending flags
  213.       (+) __HAL_DAC_GET_FLAG: Get the selected DAC's flag status
  214.  
  215.      [..]
  216.       (@) You can refer to the DAC HAL driver header file for more useful macros
  217.  
  218. @endverbatim
  219.   ******************************************************************************
  220.   * @attention
  221.   *
  222.   * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  223.   * All rights reserved.</center></h2>
  224.   *
  225.   * This software component is licensed by ST under BSD 3-Clause license,
  226.   * the "License"; You may not use this file except in compliance with the
  227.   * License. You may obtain a copy of the License at:
  228.   *                        opensource.org/licenses/BSD-3-Clause
  229.   *
  230.   ******************************************************************************
  231.   */
  232.  
  233. /* Includes ------------------------------------------------------------------*/
  234. #include "stm32l1xx_hal.h"
  235.  
  236. /** @addtogroup STM32L1xx_HAL_Driver
  237.   * @{
  238.   */
  239.  
  240. #ifdef HAL_DAC_MODULE_ENABLED
  241. #if defined(DAC1)
  242.  
  243. /** @defgroup DAC DAC
  244.   * @brief DAC driver modules
  245.   * @{
  246.   */
  247.  
  248. /* Private typedef -----------------------------------------------------------*/
  249. /* Private define ------------------------------------------------------------*/
  250. /* Private constants ---------------------------------------------------------*/
  251. /* Private macro -------------------------------------------------------------*/
  252. /* Private variables ---------------------------------------------------------*/
  253. /* Private function prototypes -----------------------------------------------*/
  254. /* Exported functions -------------------------------------------------------*/
  255.  
  256. /** @defgroup DAC_Exported_Functions DAC Exported Functions
  257.   * @{
  258.   */
  259.  
  260. /** @defgroup DAC_Exported_Functions_Group1 Initialization and de-initialization functions
  261.   *  @brief    Initialization and Configuration functions
  262.   *
  263. @verbatim
  264.   ==============================================================================
  265.               ##### Initialization and de-initialization functions #####
  266.   ==============================================================================
  267.     [..]  This section provides functions allowing to:
  268.       (+) Initialize and configure the DAC.
  269.       (+) De-initialize the DAC.
  270.  
  271. @endverbatim
  272.   * @{
  273.   */
  274.  
  275. /**
  276.   * @brief  Initialize the DAC peripheral according to the specified parameters
  277.   *         in the DAC_InitStruct and initialize the associated handle.
  278.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  279.   *         the configuration information for the specified DAC.
  280.   * @retval HAL status
  281.   */
  282. HAL_StatusTypeDef HAL_DAC_Init(DAC_HandleTypeDef *hdac)
  283. {
  284.   /* Check DAC handle */
  285.   if (hdac == NULL)
  286.   {
  287.     return HAL_ERROR;
  288.   }
  289.   /* Check the parameters */
  290.   assert_param(IS_DAC_ALL_INSTANCE(hdac->Instance));
  291.  
  292.   if (hdac->State == HAL_DAC_STATE_RESET)
  293.   {
  294. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  295.     /* Init the DAC Callback settings */
  296.     hdac->ConvCpltCallbackCh1           = HAL_DAC_ConvCpltCallbackCh1;
  297.     hdac->ConvHalfCpltCallbackCh1       = HAL_DAC_ConvHalfCpltCallbackCh1;
  298.     hdac->ErrorCallbackCh1              = HAL_DAC_ErrorCallbackCh1;
  299.     hdac->DMAUnderrunCallbackCh1        = HAL_DAC_DMAUnderrunCallbackCh1;
  300.  
  301.     hdac->ConvCpltCallbackCh2           = HAL_DACEx_ConvCpltCallbackCh2;
  302.     hdac->ConvHalfCpltCallbackCh2       = HAL_DACEx_ConvHalfCpltCallbackCh2;
  303.     hdac->ErrorCallbackCh2              = HAL_DACEx_ErrorCallbackCh2;
  304.     hdac->DMAUnderrunCallbackCh2        = HAL_DACEx_DMAUnderrunCallbackCh2;
  305.  
  306.     if (hdac->MspInitCallback == NULL)
  307.     {
  308.       hdac->MspInitCallback             = HAL_DAC_MspInit;
  309.     }
  310. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  311.  
  312.     /* Allocate lock resource and initialize it */
  313.     hdac->Lock = HAL_UNLOCKED;
  314.  
  315. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  316.     /* Init the low level hardware */
  317.     hdac->MspInitCallback(hdac);
  318. #else
  319.     /* Init the low level hardware */
  320.     HAL_DAC_MspInit(hdac);
  321. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  322.   }
  323.  
  324.   /* Initialize the DAC state*/
  325.   hdac->State = HAL_DAC_STATE_BUSY;
  326.  
  327.   /* Set DAC error code to none */
  328.   hdac->ErrorCode = HAL_DAC_ERROR_NONE;
  329.  
  330.   /* Initialize the DAC state*/
  331.   hdac->State = HAL_DAC_STATE_READY;
  332.  
  333.   /* Return function status */
  334.   return HAL_OK;
  335. }
  336.  
  337. /**
  338.   * @brief  Deinitialize the DAC peripheral registers to their default reset values.
  339.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  340.   *         the configuration information for the specified DAC.
  341.   * @retval HAL status
  342.   */
  343. HAL_StatusTypeDef HAL_DAC_DeInit(DAC_HandleTypeDef *hdac)
  344. {
  345.   /* Check DAC handle */
  346.   if (hdac == NULL)
  347.   {
  348.     return HAL_ERROR;
  349.   }
  350.  
  351.   /* Check the parameters */
  352.   assert_param(IS_DAC_ALL_INSTANCE(hdac->Instance));
  353.  
  354.   /* Change DAC state */
  355.   hdac->State = HAL_DAC_STATE_BUSY;
  356.  
  357. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  358.   if (hdac->MspDeInitCallback == NULL)
  359.   {
  360.     hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  361.   }
  362.   /* DeInit the low level hardware */
  363.   hdac->MspDeInitCallback(hdac);
  364. #else
  365.   /* DeInit the low level hardware */
  366.   HAL_DAC_MspDeInit(hdac);
  367. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  368.  
  369.   /* Set DAC error code to none */
  370.   hdac->ErrorCode = HAL_DAC_ERROR_NONE;
  371.  
  372.   /* Change DAC state */
  373.   hdac->State = HAL_DAC_STATE_RESET;
  374.  
  375.   /* Release Lock */
  376.   __HAL_UNLOCK(hdac);
  377.  
  378.   /* Return function status */
  379.   return HAL_OK;
  380. }
  381.  
  382. /**
  383.   * @brief  Initialize the DAC MSP.
  384.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  385.   *         the configuration information for the specified DAC.
  386.   * @retval None
  387.   */
  388. __weak void HAL_DAC_MspInit(DAC_HandleTypeDef *hdac)
  389. {
  390.   /* Prevent unused argument(s) compilation warning */
  391.   UNUSED(hdac);
  392.  
  393.   /* NOTE : This function should not be modified, when the callback is needed,
  394.             the HAL_DAC_MspInit could be implemented in the user file
  395.    */
  396. }
  397.  
  398. /**
  399.   * @brief  DeInitialize the DAC MSP.
  400.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  401.   *         the configuration information for the specified DAC.
  402.   * @retval None
  403.   */
  404. __weak void HAL_DAC_MspDeInit(DAC_HandleTypeDef *hdac)
  405. {
  406.   /* Prevent unused argument(s) compilation warning */
  407.   UNUSED(hdac);
  408.  
  409.   /* NOTE : This function should not be modified, when the callback is needed,
  410.             the HAL_DAC_MspDeInit could be implemented in the user file
  411.    */
  412. }
  413.  
  414. /**
  415.   * @}
  416.   */
  417.  
  418. /** @defgroup DAC_Exported_Functions_Group2 IO operation functions
  419.   *  @brief    IO operation functions
  420.   *
  421. @verbatim
  422.   ==============================================================================
  423.              ##### IO operation functions #####
  424.   ==============================================================================
  425.     [..]  This section provides functions allowing to:
  426.       (+) Start conversion.
  427.       (+) Stop conversion.
  428.       (+) Start conversion and enable DMA transfer.
  429.       (+) Stop conversion and disable DMA transfer.
  430.       (+) Get result of conversion.
  431.  
  432. @endverbatim
  433.   * @{
  434.   */
  435.  
  436. /**
  437.   * @brief  Enables DAC and starts conversion of channel.
  438.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  439.   *         the configuration information for the specified DAC.
  440.   * @param  Channel The selected DAC channel.
  441.   *          This parameter can be one of the following values:
  442.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  443.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  444.   * @retval HAL status
  445.   */
  446. HAL_StatusTypeDef HAL_DAC_Start(DAC_HandleTypeDef *hdac, uint32_t Channel)
  447. {
  448.   /* Check the parameters */
  449.   assert_param(IS_DAC_CHANNEL(Channel));
  450.  
  451.   /* Process locked */
  452.   __HAL_LOCK(hdac);
  453.  
  454.   /* Change DAC state */
  455.   hdac->State = HAL_DAC_STATE_BUSY;
  456.  
  457.   /* Enable the Peripheral */
  458.   __HAL_DAC_ENABLE(hdac, Channel);
  459.  
  460.   if (Channel == DAC_CHANNEL_1)
  461.   {
  462.     /* Check if software trigger enabled */
  463.     if ((hdac->Instance->CR & (DAC_CR_TEN1 | DAC_CR_TSEL1)) == DAC_TRIGGER_SOFTWARE)
  464.     {
  465.       /* Enable the selected DAC software conversion */
  466.       SET_BIT(hdac->Instance->SWTRIGR, DAC_SWTRIGR_SWTRIG1);
  467.     }
  468.   }
  469.  
  470.   else
  471.   {
  472.     /* Check if software trigger enabled */
  473.     if ((hdac->Instance->CR & (DAC_CR_TEN2 | DAC_CR_TSEL2)) == (DAC_TRIGGER_SOFTWARE << (Channel & 0x10UL)))
  474.     {
  475.       /* Enable the selected DAC software conversion*/
  476.       SET_BIT(hdac->Instance->SWTRIGR, DAC_SWTRIGR_SWTRIG2);
  477.     }
  478.   }
  479.  
  480.  
  481.   /* Change DAC state */
  482.   hdac->State = HAL_DAC_STATE_READY;
  483.  
  484.   /* Process unlocked */
  485.   __HAL_UNLOCK(hdac);
  486.  
  487.   /* Return function status */
  488.   return HAL_OK;
  489. }
  490.  
  491. /**
  492.   * @brief  Disables DAC and stop conversion of channel.
  493.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  494.   *         the configuration information for the specified DAC.
  495.   * @param  Channel The selected DAC channel.
  496.   *          This parameter can be one of the following values:
  497.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  498.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  499.   * @retval HAL status
  500.   */
  501. HAL_StatusTypeDef HAL_DAC_Stop(DAC_HandleTypeDef *hdac, uint32_t Channel)
  502. {
  503.   /* Check the parameters */
  504.   assert_param(IS_DAC_CHANNEL(Channel));
  505.  
  506.   /* Disable the Peripheral */
  507.   __HAL_DAC_DISABLE(hdac, Channel);
  508.  
  509.   /* Change DAC state */
  510.   hdac->State = HAL_DAC_STATE_READY;
  511.  
  512.   /* Return function status */
  513.   return HAL_OK;
  514. }
  515.  
  516. /**
  517.   * @brief  Enables DAC and starts conversion of channel.
  518.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  519.   *         the configuration information for the specified DAC.
  520.   * @param  Channel The selected DAC channel.
  521.   *          This parameter can be one of the following values:
  522.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  523.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  524.   * @param  pData The source Buffer address.
  525.   * @param  Length The length of data to be transferred from memory to DAC peripheral
  526.   * @param  Alignment Specifies the data alignment for DAC channel.
  527.   *          This parameter can be one of the following values:
  528.   *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
  529.   *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
  530.   *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
  531.   * @retval HAL status
  532.   */
  533. HAL_StatusTypeDef HAL_DAC_Start_DMA(DAC_HandleTypeDef *hdac, uint32_t Channel, uint32_t *pData, uint32_t Length,
  534.                                     uint32_t Alignment)
  535. {
  536.   HAL_StatusTypeDef status;
  537.   uint32_t tmpreg = 0U;
  538.  
  539.   /* Check the parameters */
  540.   assert_param(IS_DAC_CHANNEL(Channel));
  541.   assert_param(IS_DAC_ALIGN(Alignment));
  542.  
  543.   /* Process locked */
  544.   __HAL_LOCK(hdac);
  545.  
  546.   /* Change DAC state */
  547.   hdac->State = HAL_DAC_STATE_BUSY;
  548.  
  549.   if (Channel == DAC_CHANNEL_1)
  550.   {
  551.     /* Set the DMA transfer complete callback for channel1 */
  552.     hdac->DMA_Handle1->XferCpltCallback = DAC_DMAConvCpltCh1;
  553.  
  554.     /* Set the DMA half transfer complete callback for channel1 */
  555.     hdac->DMA_Handle1->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh1;
  556.  
  557.     /* Set the DMA error callback for channel1 */
  558.     hdac->DMA_Handle1->XferErrorCallback = DAC_DMAErrorCh1;
  559.  
  560.     /* Enable the selected DAC channel1 DMA request */
  561.     SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN1);
  562.  
  563.     /* Case of use of channel 1 */
  564.     switch (Alignment)
  565.     {
  566.       case DAC_ALIGN_12B_R:
  567.         /* Get DHR12R1 address */
  568.         tmpreg = (uint32_t)&hdac->Instance->DHR12R1;
  569.         break;
  570.       case DAC_ALIGN_12B_L:
  571.         /* Get DHR12L1 address */
  572.         tmpreg = (uint32_t)&hdac->Instance->DHR12L1;
  573.         break;
  574.       case DAC_ALIGN_8B_R:
  575.         /* Get DHR8R1 address */
  576.         tmpreg = (uint32_t)&hdac->Instance->DHR8R1;
  577.         break;
  578.       default:
  579.         break;
  580.     }
  581.   }
  582.  
  583.   else
  584.   {
  585.     /* Set the DMA transfer complete callback for channel2 */
  586.     hdac->DMA_Handle2->XferCpltCallback = DAC_DMAConvCpltCh2;
  587.  
  588.     /* Set the DMA half transfer complete callback for channel2 */
  589.     hdac->DMA_Handle2->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh2;
  590.  
  591.     /* Set the DMA error callback for channel2 */
  592.     hdac->DMA_Handle2->XferErrorCallback = DAC_DMAErrorCh2;
  593.  
  594.     /* Enable the selected DAC channel2 DMA request */
  595.     SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN2);
  596.  
  597.     /* Case of use of channel 2 */
  598.     switch (Alignment)
  599.     {
  600.       case DAC_ALIGN_12B_R:
  601.         /* Get DHR12R2 address */
  602.         tmpreg = (uint32_t)&hdac->Instance->DHR12R2;
  603.         break;
  604.       case DAC_ALIGN_12B_L:
  605.         /* Get DHR12L2 address */
  606.         tmpreg = (uint32_t)&hdac->Instance->DHR12L2;
  607.         break;
  608.       case DAC_ALIGN_8B_R:
  609.         /* Get DHR8R2 address */
  610.         tmpreg = (uint32_t)&hdac->Instance->DHR8R2;
  611.         break;
  612.       default:
  613.         break;
  614.     }
  615.   }
  616.  
  617.  
  618.   /* Enable the DMA channel */
  619.   if (Channel == DAC_CHANNEL_1)
  620.   {
  621.     /* Enable the DAC DMA underrun interrupt */
  622.     __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR1);
  623.  
  624.     /* Enable the DMA channel */
  625.     status = HAL_DMA_Start_IT(hdac->DMA_Handle1, (uint32_t)pData, tmpreg, Length);
  626.   }
  627.  
  628.   else
  629.   {
  630.     /* Enable the DAC DMA underrun interrupt */
  631.     __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR2);
  632.  
  633.     /* Enable the DMA channel */
  634.     status = HAL_DMA_Start_IT(hdac->DMA_Handle2, (uint32_t)pData, tmpreg, Length);
  635.   }
  636.  
  637.  
  638.   /* Process Unlocked */
  639.   __HAL_UNLOCK(hdac);
  640.  
  641.   if (status == HAL_OK)
  642.   {
  643.     /* Enable the Peripheral */
  644.     __HAL_DAC_ENABLE(hdac, Channel);
  645.   }
  646.   else
  647.   {
  648.     hdac->ErrorCode |= HAL_DAC_ERROR_DMA;
  649.   }
  650.  
  651.   /* Return function status */
  652.   return status;
  653. }
  654.  
  655. /**
  656.   * @brief  Disables DAC and stop conversion of channel.
  657.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  658.   *         the configuration information for the specified DAC.
  659.   * @param  Channel The selected DAC channel.
  660.   *          This parameter can be one of the following values:
  661.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  662.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  663.   * @retval HAL status
  664.   */
  665. HAL_StatusTypeDef HAL_DAC_Stop_DMA(DAC_HandleTypeDef *hdac, uint32_t Channel)
  666. {
  667.   /* Check the parameters */
  668.   assert_param(IS_DAC_CHANNEL(Channel));
  669.  
  670.   /* Disable the selected DAC channel DMA request */
  671.   hdac->Instance->CR &= ~(DAC_CR_DMAEN1 << (Channel & 0x10UL));
  672.  
  673.   /* Disable the Peripheral */
  674.   __HAL_DAC_DISABLE(hdac, Channel);
  675.  
  676.   /* Disable the DMA channel */
  677.  
  678.   /* Channel1 is used */
  679.   if (Channel == DAC_CHANNEL_1)
  680.   {
  681.     /* Disable the DMA channel */
  682.     (void)HAL_DMA_Abort(hdac->DMA_Handle1);
  683.  
  684.     /* Disable the DAC DMA underrun interrupt */
  685.     __HAL_DAC_DISABLE_IT(hdac, DAC_IT_DMAUDR1);
  686.   }
  687.  
  688.   else /* Channel2 is used for */
  689.   {
  690.     /* Disable the DMA channel */
  691.     (void)HAL_DMA_Abort(hdac->DMA_Handle2);
  692.  
  693.     /* Disable the DAC DMA underrun interrupt */
  694.     __HAL_DAC_DISABLE_IT(hdac, DAC_IT_DMAUDR2);
  695.   }
  696.  
  697.  
  698.   /* Change DAC state */
  699.   hdac->State = HAL_DAC_STATE_READY;
  700.  
  701.   /* Return function status */
  702.   return HAL_OK;
  703. }
  704.  
  705. /**
  706.   * @brief  Handles DAC interrupt request
  707.   *         This function uses the interruption of DMA
  708.   *         underrun.
  709.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  710.   *         the configuration information for the specified DAC.
  711.   * @retval None
  712.   */
  713. void HAL_DAC_IRQHandler(DAC_HandleTypeDef *hdac)
  714. {
  715.   if (__HAL_DAC_GET_IT_SOURCE(hdac, DAC_IT_DMAUDR1))
  716.   {
  717.     /* Check underrun flag of DAC channel 1 */
  718.     if (__HAL_DAC_GET_FLAG(hdac, DAC_FLAG_DMAUDR1))
  719.     {
  720.       /* Change DAC state to error state */
  721.       hdac->State = HAL_DAC_STATE_ERROR;
  722.  
  723.       /* Set DAC error code to channel1 DMA underrun error */
  724.       SET_BIT(hdac->ErrorCode, HAL_DAC_ERROR_DMAUNDERRUNCH1);
  725.  
  726.       /* Clear the underrun flag */
  727.       __HAL_DAC_CLEAR_FLAG(hdac, DAC_FLAG_DMAUDR1);
  728.  
  729.       /* Disable the selected DAC channel1 DMA request */
  730.       CLEAR_BIT(hdac->Instance->CR, DAC_CR_DMAEN1);
  731.  
  732.       /* Error callback */
  733. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  734.       hdac->DMAUnderrunCallbackCh1(hdac);
  735. #else
  736.       HAL_DAC_DMAUnderrunCallbackCh1(hdac);
  737. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  738.     }
  739.   }
  740.  
  741.  
  742.   if (__HAL_DAC_GET_IT_SOURCE(hdac, DAC_IT_DMAUDR2))
  743.   {
  744.     /* Check underrun flag of DAC channel 2 */
  745.     if (__HAL_DAC_GET_FLAG(hdac, DAC_FLAG_DMAUDR2))
  746.     {
  747.       /* Change DAC state to error state */
  748.       hdac->State = HAL_DAC_STATE_ERROR;
  749.  
  750.       /* Set DAC error code to channel2 DMA underrun error */
  751.       SET_BIT(hdac->ErrorCode, HAL_DAC_ERROR_DMAUNDERRUNCH2);
  752.  
  753.       /* Clear the underrun flag */
  754.       __HAL_DAC_CLEAR_FLAG(hdac, DAC_FLAG_DMAUDR2);
  755.  
  756.       /* Disable the selected DAC channel2 DMA request */
  757.       CLEAR_BIT(hdac->Instance->CR, DAC_CR_DMAEN2);
  758.  
  759.       /* Error callback */
  760. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  761.       hdac->DMAUnderrunCallbackCh2(hdac);
  762. #else
  763.       HAL_DACEx_DMAUnderrunCallbackCh2(hdac);
  764. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  765.     }
  766.   }
  767.  
  768. }
  769.  
  770. /**
  771.   * @brief  Set the specified data holding register value for DAC channel.
  772.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  773.   *         the configuration information for the specified DAC.
  774.   * @param  Channel The selected DAC channel.
  775.   *          This parameter can be one of the following values:
  776.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  777.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  778.   * @param  Alignment Specifies the data alignment.
  779.   *          This parameter can be one of the following values:
  780.   *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
  781.   *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
  782.   *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
  783.   * @param  Data Data to be loaded in the selected data holding register.
  784.   * @retval HAL status
  785.   */
  786. HAL_StatusTypeDef HAL_DAC_SetValue(DAC_HandleTypeDef *hdac, uint32_t Channel, uint32_t Alignment, uint32_t Data)
  787. {
  788.   __IO uint32_t tmp = 0UL;
  789.  
  790.   /* Check the parameters */
  791.   assert_param(IS_DAC_CHANNEL(Channel));
  792.   assert_param(IS_DAC_ALIGN(Alignment));
  793.   assert_param(IS_DAC_DATA(Data));
  794.  
  795.   tmp = (uint32_t)hdac->Instance;
  796.   if (Channel == DAC_CHANNEL_1)
  797.   {
  798.     tmp += DAC_DHR12R1_ALIGNMENT(Alignment);
  799.   }
  800.  
  801.   else
  802.   {
  803.     tmp += DAC_DHR12R2_ALIGNMENT(Alignment);
  804.   }
  805.  
  806.  
  807.   /* Set the DAC channel selected data holding register */
  808.   *(__IO uint32_t *) tmp = Data;
  809.  
  810.   /* Return function status */
  811.   return HAL_OK;
  812. }
  813.  
  814. /**
  815.   * @brief  Conversion complete callback in non-blocking mode for Channel1
  816.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  817.   *         the configuration information for the specified DAC.
  818.   * @retval None
  819.   */
  820. __weak void HAL_DAC_ConvCpltCallbackCh1(DAC_HandleTypeDef *hdac)
  821. {
  822.   /* Prevent unused argument(s) compilation warning */
  823.   UNUSED(hdac);
  824.  
  825.   /* NOTE : This function should not be modified, when the callback is needed,
  826.             the HAL_DAC_ConvCpltCallbackCh1 could be implemented in the user file
  827.    */
  828. }
  829.  
  830. /**
  831.   * @brief  Conversion half DMA transfer callback in non-blocking mode for Channel1
  832.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  833.   *         the configuration information for the specified DAC.
  834.   * @retval None
  835.   */
  836. __weak void HAL_DAC_ConvHalfCpltCallbackCh1(DAC_HandleTypeDef *hdac)
  837. {
  838.   /* Prevent unused argument(s) compilation warning */
  839.   UNUSED(hdac);
  840.  
  841.   /* NOTE : This function should not be modified, when the callback is needed,
  842.             the HAL_DAC_ConvHalfCpltCallbackCh1 could be implemented in the user file
  843.    */
  844. }
  845.  
  846. /**
  847.   * @brief  Error DAC callback for Channel1.
  848.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  849.   *         the configuration information for the specified DAC.
  850.   * @retval None
  851.   */
  852. __weak void HAL_DAC_ErrorCallbackCh1(DAC_HandleTypeDef *hdac)
  853. {
  854.   /* Prevent unused argument(s) compilation warning */
  855.   UNUSED(hdac);
  856.  
  857.   /* NOTE : This function should not be modified, when the callback is needed,
  858.             the HAL_DAC_ErrorCallbackCh1 could be implemented in the user file
  859.    */
  860. }
  861.  
  862. /**
  863.   * @brief  DMA underrun DAC callback for channel1.
  864.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  865.   *         the configuration information for the specified DAC.
  866.   * @retval None
  867.   */
  868. __weak void HAL_DAC_DMAUnderrunCallbackCh1(DAC_HandleTypeDef *hdac)
  869. {
  870.   /* Prevent unused argument(s) compilation warning */
  871.   UNUSED(hdac);
  872.  
  873.   /* NOTE : This function should not be modified, when the callback is needed,
  874.             the HAL_DAC_DMAUnderrunCallbackCh1 could be implemented in the user file
  875.    */
  876. }
  877.  
  878. /**
  879.   * @}
  880.   */
  881.  
  882. /** @defgroup DAC_Exported_Functions_Group3 Peripheral Control functions
  883.   *  @brief    Peripheral Control functions
  884.   *
  885. @verbatim
  886.   ==============================================================================
  887.              ##### Peripheral Control functions #####
  888.   ==============================================================================
  889.     [..]  This section provides functions allowing to:
  890.       (+) Configure channels.
  891.       (+) Set the specified data holding register value for DAC channel.
  892.  
  893. @endverbatim
  894.   * @{
  895.   */
  896.  
  897. /**
  898.   * @brief  Returns the last data output value of the selected DAC channel.
  899.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  900.   *         the configuration information for the specified DAC.
  901.   * @param  Channel The selected DAC channel.
  902.   *          This parameter can be one of the following values:
  903.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  904.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  905.   * @retval The selected DAC channel data output value.
  906.   */
  907. uint32_t HAL_DAC_GetValue(DAC_HandleTypeDef *hdac, uint32_t Channel)
  908. {
  909.   uint32_t result;
  910.  
  911.   /* Check the parameters */
  912.   assert_param(IS_DAC_CHANNEL(Channel));
  913.  
  914.   if (Channel == DAC_CHANNEL_1)
  915.   {
  916.     result = hdac->Instance->DOR1;
  917.   }
  918.  
  919.   else
  920.   {
  921.     result = hdac->Instance->DOR2;
  922.   }
  923.  
  924.   /* Returns the DAC channel data output register value */
  925.   return result;
  926. }
  927.  
  928. /**
  929.   * @brief  Configures the selected DAC channel.
  930.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  931.   *         the configuration information for the specified DAC.
  932.   * @param  sConfig DAC configuration structure.
  933.   * @param  Channel The selected DAC channel.
  934.   *          This parameter can be one of the following values:
  935.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  936.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  937.   * @retval HAL status
  938.   */
  939. HAL_StatusTypeDef HAL_DAC_ConfigChannel(DAC_HandleTypeDef *hdac, DAC_ChannelConfTypeDef *sConfig, uint32_t Channel)
  940. {
  941.   uint32_t tmpreg1;
  942.   uint32_t tmpreg2;
  943.  
  944.   /* Check the DAC parameters */
  945.   assert_param(IS_DAC_TRIGGER(sConfig->DAC_Trigger));
  946.   assert_param(IS_DAC_OUTPUT_BUFFER_STATE(sConfig->DAC_OutputBuffer));
  947.   assert_param(IS_DAC_CHANNEL(Channel));
  948.  
  949.   /* Process locked */
  950.   __HAL_LOCK(hdac);
  951.  
  952.   /* Change DAC state */
  953.   hdac->State = HAL_DAC_STATE_BUSY;
  954.  
  955.   /* Get the DAC CR value */
  956.   tmpreg1 = hdac->Instance->CR;
  957.   /* Clear BOFFx, TENx, TSELx, WAVEx and MAMPx bits */
  958.   tmpreg1 &= ~(((uint32_t)(DAC_CR_MAMP1 | DAC_CR_WAVE1 | DAC_CR_TSEL1 | DAC_CR_TEN1 | DAC_CR_BOFF1)) << (Channel & 0x10UL));
  959.   /* Configure for the selected DAC channel: buffer output, trigger */
  960.   /* Set TSELx and TENx bits according to DAC_Trigger value */
  961.   /* Set BOFFx bit according to DAC_OutputBuffer value */
  962.   tmpreg2 = (sConfig->DAC_Trigger | sConfig->DAC_OutputBuffer);
  963.   /* Calculate CR register value depending on DAC_Channel */
  964.   tmpreg1 |= tmpreg2 << (Channel & 0x10UL);
  965.   /* Write to DAC CR */
  966.   hdac->Instance->CR = tmpreg1;
  967.   /* Disable wave generation */
  968.   CLEAR_BIT(hdac->Instance->CR, (DAC_CR_WAVE1 << (Channel & 0x10UL)));
  969.  
  970.   /* Change DAC state */
  971.   hdac->State = HAL_DAC_STATE_READY;
  972.  
  973.   /* Process unlocked */
  974.   __HAL_UNLOCK(hdac);
  975.  
  976.   /* Return function status */
  977.   return HAL_OK;
  978. }
  979.  
  980. /**
  981.   * @}
  982.   */
  983.  
  984. /** @defgroup DAC_Exported_Functions_Group4 Peripheral State and Errors functions
  985.   *  @brief   Peripheral State and Errors functions
  986.   *
  987. @verbatim
  988.   ==============================================================================
  989.             ##### Peripheral State and Errors functions #####
  990.   ==============================================================================
  991.     [..]
  992.     This subsection provides functions allowing to
  993.       (+) Check the DAC state.
  994.       (+) Check the DAC Errors.
  995.  
  996. @endverbatim
  997.   * @{
  998.   */
  999.  
  1000. /**
  1001.   * @brief  return the DAC handle state
  1002.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  1003.   *         the configuration information for the specified DAC.
  1004.   * @retval HAL state
  1005.   */
  1006. HAL_DAC_StateTypeDef HAL_DAC_GetState(DAC_HandleTypeDef *hdac)
  1007. {
  1008.   /* Return DAC handle state */
  1009.   return hdac->State;
  1010. }
  1011.  
  1012.  
  1013. /**
  1014.   * @brief  Return the DAC error code
  1015.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  1016.   *         the configuration information for the specified DAC.
  1017.   * @retval DAC Error Code
  1018.   */
  1019. uint32_t HAL_DAC_GetError(DAC_HandleTypeDef *hdac)
  1020. {
  1021.   return hdac->ErrorCode;
  1022. }
  1023.  
  1024. /**
  1025.   * @}
  1026.   */
  1027.  
  1028. /**
  1029.   * @}
  1030.   */
  1031.  
  1032. /** @addtogroup DAC_Exported_Functions
  1033.   * @{
  1034.   */
  1035.  
  1036. /** @addtogroup DAC_Exported_Functions_Group1
  1037.   * @{
  1038.   */
  1039. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1040. /**
  1041.   * @brief  Register a User DAC Callback
  1042.   *         To be used instead of the weak (surcharged) predefined callback
  1043.   * @param  hdac DAC handle
  1044.   * @param  CallbackID ID of the callback to be registered
  1045.   *         This parameter can be one of the following values:
  1046.   *          @arg @ref HAL_DAC_ERROR_INVALID_CALLBACK   DAC Error Callback ID
  1047.   *          @arg @ref HAL_DAC_CH1_COMPLETE_CB_ID       DAC CH1 Complete Callback ID
  1048.   *          @arg @ref HAL_DAC_CH1_HALF_COMPLETE_CB_ID  DAC CH1 Half Complete Callback ID
  1049.   *          @arg @ref HAL_DAC_CH1_ERROR_ID             DAC CH1 Error Callback ID
  1050.   *          @arg @ref HAL_DAC_CH1_UNDERRUN_CB_ID       DAC CH1 UnderRun Callback ID
  1051.   *          @arg @ref HAL_DAC_CH2_COMPLETE_CB_ID       DAC CH2 Complete Callback ID
  1052.   *          @arg @ref HAL_DAC_CH2_HALF_COMPLETE_CB_ID  DAC CH2 Half Complete Callback ID
  1053.   *          @arg @ref HAL_DAC_CH2_ERROR_ID             DAC CH2 Error Callback ID
  1054.   *          @arg @ref HAL_DAC_CH2_UNDERRUN_CB_ID       DAC CH2 UnderRun Callback ID
  1055.   *          @arg @ref HAL_DAC_MSPINIT_CB_ID            DAC MSP Init Callback ID
  1056.   *          @arg @ref HAL_DAC_MSPDEINIT_CB_ID          DAC MSP DeInit Callback ID
  1057.   *
  1058.   * @param  pCallback pointer to the Callback function
  1059.   * @retval status
  1060.   */
  1061. HAL_StatusTypeDef HAL_DAC_RegisterCallback(DAC_HandleTypeDef *hdac, HAL_DAC_CallbackIDTypeDef CallbackID,
  1062.                                            pDAC_CallbackTypeDef pCallback)
  1063. {
  1064.   HAL_StatusTypeDef status = HAL_OK;
  1065.  
  1066.   if (pCallback == NULL)
  1067.   {
  1068.     /* Update the error code */
  1069.     hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1070.     return HAL_ERROR;
  1071.   }
  1072.  
  1073.   /* Process locked */
  1074.   __HAL_LOCK(hdac);
  1075.  
  1076.   if (hdac->State == HAL_DAC_STATE_READY)
  1077.   {
  1078.     switch (CallbackID)
  1079.     {
  1080.       case HAL_DAC_CH1_COMPLETE_CB_ID :
  1081.         hdac->ConvCpltCallbackCh1 = pCallback;
  1082.         break;
  1083.       case HAL_DAC_CH1_HALF_COMPLETE_CB_ID :
  1084.         hdac->ConvHalfCpltCallbackCh1 = pCallback;
  1085.         break;
  1086.       case HAL_DAC_CH1_ERROR_ID :
  1087.         hdac->ErrorCallbackCh1 = pCallback;
  1088.         break;
  1089.       case HAL_DAC_CH1_UNDERRUN_CB_ID :
  1090.         hdac->DMAUnderrunCallbackCh1 = pCallback;
  1091.         break;
  1092.  
  1093.       case HAL_DAC_CH2_COMPLETE_CB_ID :
  1094.         hdac->ConvCpltCallbackCh2 = pCallback;
  1095.         break;
  1096.       case HAL_DAC_CH2_HALF_COMPLETE_CB_ID :
  1097.         hdac->ConvHalfCpltCallbackCh2 = pCallback;
  1098.         break;
  1099.       case HAL_DAC_CH2_ERROR_ID :
  1100.         hdac->ErrorCallbackCh2 = pCallback;
  1101.         break;
  1102.       case HAL_DAC_CH2_UNDERRUN_CB_ID :
  1103.         hdac->DMAUnderrunCallbackCh2 = pCallback;
  1104.         break;
  1105.  
  1106.       case HAL_DAC_MSPINIT_CB_ID :
  1107.         hdac->MspInitCallback = pCallback;
  1108.         break;
  1109.       case HAL_DAC_MSPDEINIT_CB_ID :
  1110.         hdac->MspDeInitCallback = pCallback;
  1111.         break;
  1112.       default :
  1113.         /* Update the error code */
  1114.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1115.         /* update return status */
  1116.         status =  HAL_ERROR;
  1117.         break;
  1118.     }
  1119.   }
  1120.   else if (hdac->State == HAL_DAC_STATE_RESET)
  1121.   {
  1122.     switch (CallbackID)
  1123.     {
  1124.       case HAL_DAC_MSPINIT_CB_ID :
  1125.         hdac->MspInitCallback = pCallback;
  1126.         break;
  1127.       case HAL_DAC_MSPDEINIT_CB_ID :
  1128.         hdac->MspDeInitCallback = pCallback;
  1129.         break;
  1130.       default :
  1131.         /* Update the error code */
  1132.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1133.         /* update return status */
  1134.         status =  HAL_ERROR;
  1135.         break;
  1136.     }
  1137.   }
  1138.   else
  1139.   {
  1140.     /* Update the error code */
  1141.     hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1142.     /* update return status */
  1143.     status =  HAL_ERROR;
  1144.   }
  1145.  
  1146.   /* Release Lock */
  1147.   __HAL_UNLOCK(hdac);
  1148.   return status;
  1149. }
  1150.  
  1151. /**
  1152.   * @brief  Unregister a User DAC Callback
  1153.   *         DAC Callback is redirected to the weak (surcharged) predefined callback
  1154.   * @param  hdac DAC handle
  1155.   * @param  CallbackID ID of the callback to be unregistered
  1156.   *         This parameter can be one of the following values:
  1157.   *          @arg @ref HAL_DAC_CH1_COMPLETE_CB_ID          DAC CH1 transfer Complete Callback ID
  1158.   *          @arg @ref HAL_DAC_CH1_HALF_COMPLETE_CB_ID     DAC CH1 Half Complete Callback ID
  1159.   *          @arg @ref HAL_DAC_CH1_ERROR_ID                DAC CH1 Error Callback ID
  1160.   *          @arg @ref HAL_DAC_CH1_UNDERRUN_CB_ID          DAC CH1 UnderRun Callback ID
  1161.   *          @arg @ref HAL_DAC_CH2_COMPLETE_CB_ID          DAC CH2 Complete Callback ID
  1162.   *          @arg @ref HAL_DAC_CH2_HALF_COMPLETE_CB_ID     DAC CH2 Half Complete Callback ID
  1163.   *          @arg @ref HAL_DAC_CH2_ERROR_ID                DAC CH2 Error Callback ID
  1164.   *          @arg @ref HAL_DAC_CH2_UNDERRUN_CB_ID          DAC CH2 UnderRun Callback ID
  1165.   *          @arg @ref HAL_DAC_MSPINIT_CB_ID               DAC MSP Init Callback ID
  1166.   *          @arg @ref HAL_DAC_MSPDEINIT_CB_ID             DAC MSP DeInit Callback ID
  1167.   *          @arg @ref HAL_DAC_ALL_CB_ID                   DAC All callbacks
  1168.   * @retval status
  1169.   */
  1170. HAL_StatusTypeDef HAL_DAC_UnRegisterCallback(DAC_HandleTypeDef *hdac, HAL_DAC_CallbackIDTypeDef CallbackID)
  1171. {
  1172.   HAL_StatusTypeDef status = HAL_OK;
  1173.  
  1174.   /* Process locked */
  1175.   __HAL_LOCK(hdac);
  1176.  
  1177.   if (hdac->State == HAL_DAC_STATE_READY)
  1178.   {
  1179.     switch (CallbackID)
  1180.     {
  1181.       case HAL_DAC_CH1_COMPLETE_CB_ID :
  1182.         hdac->ConvCpltCallbackCh1 = HAL_DAC_ConvCpltCallbackCh1;
  1183.         break;
  1184.       case HAL_DAC_CH1_HALF_COMPLETE_CB_ID :
  1185.         hdac->ConvHalfCpltCallbackCh1 = HAL_DAC_ConvHalfCpltCallbackCh1;
  1186.         break;
  1187.       case HAL_DAC_CH1_ERROR_ID :
  1188.         hdac->ErrorCallbackCh1 = HAL_DAC_ErrorCallbackCh1;
  1189.         break;
  1190.       case HAL_DAC_CH1_UNDERRUN_CB_ID :
  1191.         hdac->DMAUnderrunCallbackCh1 = HAL_DAC_DMAUnderrunCallbackCh1;
  1192.         break;
  1193.  
  1194.       case HAL_DAC_CH2_COMPLETE_CB_ID :
  1195.         hdac->ConvCpltCallbackCh2 = HAL_DACEx_ConvCpltCallbackCh2;
  1196.         break;
  1197.       case HAL_DAC_CH2_HALF_COMPLETE_CB_ID :
  1198.         hdac->ConvHalfCpltCallbackCh2 = HAL_DACEx_ConvHalfCpltCallbackCh2;
  1199.         break;
  1200.       case HAL_DAC_CH2_ERROR_ID :
  1201.         hdac->ErrorCallbackCh2 = HAL_DACEx_ErrorCallbackCh2;
  1202.         break;
  1203.       case HAL_DAC_CH2_UNDERRUN_CB_ID :
  1204.         hdac->DMAUnderrunCallbackCh2 = HAL_DACEx_DMAUnderrunCallbackCh2;
  1205.         break;
  1206.  
  1207.       case HAL_DAC_MSPINIT_CB_ID :
  1208.         hdac->MspInitCallback = HAL_DAC_MspInit;
  1209.         break;
  1210.       case HAL_DAC_MSPDEINIT_CB_ID :
  1211.         hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  1212.         break;
  1213.       case HAL_DAC_ALL_CB_ID :
  1214.         hdac->ConvCpltCallbackCh1 = HAL_DAC_ConvCpltCallbackCh1;
  1215.         hdac->ConvHalfCpltCallbackCh1 = HAL_DAC_ConvHalfCpltCallbackCh1;
  1216.         hdac->ErrorCallbackCh1 = HAL_DAC_ErrorCallbackCh1;
  1217.         hdac->DMAUnderrunCallbackCh1 = HAL_DAC_DMAUnderrunCallbackCh1;
  1218.  
  1219.         hdac->ConvCpltCallbackCh2 = HAL_DACEx_ConvCpltCallbackCh2;
  1220.         hdac->ConvHalfCpltCallbackCh2 = HAL_DACEx_ConvHalfCpltCallbackCh2;
  1221.         hdac->ErrorCallbackCh2 = HAL_DACEx_ErrorCallbackCh2;
  1222.         hdac->DMAUnderrunCallbackCh2 = HAL_DACEx_DMAUnderrunCallbackCh2;
  1223.  
  1224.         hdac->MspInitCallback = HAL_DAC_MspInit;
  1225.         hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  1226.         break;
  1227.       default :
  1228.         /* Update the error code */
  1229.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1230.         /* update return status */
  1231.         status =  HAL_ERROR;
  1232.         break;
  1233.     }
  1234.   }
  1235.   else if (hdac->State == HAL_DAC_STATE_RESET)
  1236.   {
  1237.     switch (CallbackID)
  1238.     {
  1239.       case HAL_DAC_MSPINIT_CB_ID :
  1240.         hdac->MspInitCallback = HAL_DAC_MspInit;
  1241.         break;
  1242.       case HAL_DAC_MSPDEINIT_CB_ID :
  1243.         hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  1244.         break;
  1245.       default :
  1246.         /* Update the error code */
  1247.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1248.         /* update return status */
  1249.         status =  HAL_ERROR;
  1250.         break;
  1251.     }
  1252.   }
  1253.   else
  1254.   {
  1255.     /* Update the error code */
  1256.     hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1257.     /* update return status */
  1258.     status =  HAL_ERROR;
  1259.   }
  1260.  
  1261.   /* Release Lock */
  1262.   __HAL_UNLOCK(hdac);
  1263.   return status;
  1264. }
  1265. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1266.  
  1267. /**
  1268.   * @}
  1269.   */
  1270.  
  1271. /**
  1272.   * @}
  1273.   */
  1274.  
  1275. /** @addtogroup DAC_Private_Functions
  1276.   * @{
  1277.   */
  1278.  
  1279. /**
  1280.   * @brief  DMA conversion complete callback.
  1281.   * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  1282.   *                the configuration information for the specified DMA module.
  1283.   * @retval None
  1284.   */
  1285. void DAC_DMAConvCpltCh1(DMA_HandleTypeDef *hdma)
  1286. {
  1287.   DAC_HandleTypeDef *hdac = (DAC_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  1288.  
  1289. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1290.   hdac->ConvCpltCallbackCh1(hdac);
  1291. #else
  1292.   HAL_DAC_ConvCpltCallbackCh1(hdac);
  1293. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1294.  
  1295.   hdac->State = HAL_DAC_STATE_READY;
  1296. }
  1297.  
  1298. /**
  1299.   * @brief  DMA half transfer complete callback.
  1300.   * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  1301.   *                the configuration information for the specified DMA module.
  1302.   * @retval None
  1303.   */
  1304. void DAC_DMAHalfConvCpltCh1(DMA_HandleTypeDef *hdma)
  1305. {
  1306.   DAC_HandleTypeDef *hdac = (DAC_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  1307.   /* Conversion complete callback */
  1308. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1309.   hdac->ConvHalfCpltCallbackCh1(hdac);
  1310. #else
  1311.   HAL_DAC_ConvHalfCpltCallbackCh1(hdac);
  1312. #endif  /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1313. }
  1314.  
  1315. /**
  1316.   * @brief  DMA error callback
  1317.   * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  1318.   *                the configuration information for the specified DMA module.
  1319.   * @retval None
  1320.   */
  1321. void DAC_DMAErrorCh1(DMA_HandleTypeDef *hdma)
  1322. {
  1323.   DAC_HandleTypeDef *hdac = (DAC_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  1324.  
  1325.   /* Set DAC error code to DMA error */
  1326.   hdac->ErrorCode |= HAL_DAC_ERROR_DMA;
  1327.  
  1328. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1329.   hdac->ErrorCallbackCh1(hdac);
  1330. #else
  1331.   HAL_DAC_ErrorCallbackCh1(hdac);
  1332. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1333.  
  1334.   hdac->State = HAL_DAC_STATE_READY;
  1335. }
  1336.  
  1337. /**
  1338.   * @}
  1339.   */
  1340.  
  1341. /**
  1342.   * @}
  1343.   */
  1344.  
  1345. #endif /* DAC1 */
  1346.  
  1347. #endif /* HAL_DAC_MODULE_ENABLED */
  1348.  
  1349. /**
  1350.   * @}
  1351.   */
  1352.  
  1353. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  1354.