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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.   @verbatim
  15.   ==============================================================================
  16.                       ##### DAC Peripheral features #####
  17.   ==============================================================================
  18.     [..]
  19.       *** DAC Channels ***
  20.       ====================
  21.     [..]
  22.     STM32F1 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
  42.           For STM32F10x connectivity line devices and STM32F100x devices: TIM3
  43.           For STM32F10x high-density and XL-density devices: TIM8
  44.           For STM32F100x high-density value line devices: TIM15 as
  45.           replacement of TIM5.
  46.           (DAC_TRIGGER_T2_TRGO, DAC_TRIGGER_T4_TRGO...)
  47.  
  48.       (#) Software using DAC_TRIGGER_SOFTWARE
  49.  
  50.       *** DAC Buffer mode feature ***
  51.       ===============================
  52.       [..]
  53.       Each DAC channel integrates an output buffer that can be used to
  54.       reduce the output impedance, and to drive external loads directly
  55.       without having to add an external operational amplifier.
  56.       To enable, the output buffer use
  57.       sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
  58.       [..]
  59.       (@) Refer to the device datasheet for more details about output
  60.           impedance value with and without output buffer.
  61.  
  62.       *** DAC connect feature ***
  63.       ===============================
  64.       [..]
  65.       Each DAC channel can be connected internally.
  66.       To connect, use
  67.       sConfig.DAC_ConnectOnChipPeripheral = DAC_CHIPCONNECT_ENABLE;
  68.  
  69.       *** GPIO configurations guidelines ***
  70.       =====================
  71.       [..]
  72.       When a DAC channel is used (ex channel1 on PA4) and the other is not
  73.       (ex channel2 on PA5 is configured in Analog and disabled).
  74.       Channel1 may disturb channel2 as coupling effect.
  75.       Note that there is no coupling on channel2 as soon as channel2 is turned on.
  76.       Coupling on adjacent channel could be avoided as follows:
  77.       when unused PA5 is configured as INPUT PULL-UP or DOWN.
  78.       PA5 is configured in ANALOG just before it is turned on.
  79.  
  80.        *** DAC wave generation feature ***
  81.        ===================================
  82.        [..]
  83.        Both DAC channels can be used to generate
  84.          (#) Noise wave
  85.          (#) Triangle wave
  86.  
  87.        *** DAC data format ***
  88.        =======================
  89.        [..]
  90.        The DAC data format can be:
  91.          (#) 8-bit right alignment using DAC_ALIGN_8B_R
  92.          (#) 12-bit left alignment using DAC_ALIGN_12B_L
  93.          (#) 12-bit right alignment using DAC_ALIGN_12B_R
  94.  
  95.        *** DAC data value to voltage correspondence ***
  96.        ================================================
  97.        [..]
  98.        The analog output voltage on each DAC channel pin is determined
  99.        by the following equation:
  100.        [..]
  101.        DAC_OUTx = VREF+ * DOR / 4095
  102.        (+) with  DOR is the Data Output Register
  103.        [..]
  104.           VEF+ is the input voltage reference (refer to the device datasheet)
  105.        [..]
  106.         e.g. To set DAC_OUT1 to 0.7V, use
  107.        (+) Assuming that VREF+ = 3.3V, DAC_OUT1 = (3.3 * 868) / 4095 = 0.7V
  108.  
  109.        *** DMA requests ***
  110.        =====================
  111.        [..]
  112.        A DMA request can be generated when an external trigger (but not a software trigger)
  113.        occurs if DMA1 requests are enabled using HAL_DAC_Start_DMA().
  114.        DMA1 requests are mapped as following:
  115.       (#) DAC channel1 mapped on DMA1 channel3
  116.           for STM32F100x low-density, medium-density, high-density with DAC
  117.           DMA remap:
  118.       (#) DAC channel2 mapped on DMA2 channel3
  119.           for STM32F100x high-density without DAC DMA remap and other  
  120.           STM32F1 devices
  121.  
  122.      [..]
  123.     (@) For Dual mode and specific signal (Triangle and noise) generation please
  124.         refer to Extended Features Driver description
  125.  
  126.                       ##### How to use this driver #####
  127.   ==============================================================================
  128.     [..]
  129.       (+) DAC APB clock must be enabled to get write access to DAC
  130.           registers using HAL_DAC_Init()
  131.       (+) Configure DAC_OUTx (DAC_OUT1: PA4, DAC_OUT2: PA5) in analog mode.
  132.       (+) Configure the DAC channel using HAL_DAC_ConfigChannel() function.
  133.       (+) Enable the DAC channel using HAL_DAC_Start() or HAL_DAC_Start_DMA() functions.
  134.  
  135.  
  136.      *** Polling mode IO operation ***
  137.      =================================
  138.      [..]
  139.        (+) Start the DAC peripheral using HAL_DAC_Start()
  140.        (+) To read the DAC last data output value, use the HAL_DAC_GetValue() function.
  141.        (+) Stop the DAC peripheral using HAL_DAC_Stop()
  142.  
  143.      *** DMA mode IO operation ***
  144.      ==============================
  145.      [..]
  146.        (+) Start the DAC peripheral using HAL_DAC_Start_DMA(), at this stage the user specify the length
  147.            of data to be transferred at each end of conversion
  148.            First issued trigger will start the conversion of the value previously set by HAL_DAC_SetValue().
  149.        (+) At the middle of data transfer HAL_DAC_ConvHalfCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  150.            function is executed and user can add his own code by customization of function pointer
  151.            HAL_DAC_ConvHalfCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  152.        (+) At The end of data transfer HAL_DAC_ConvCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  153.            function is executed and user can add his own code by customization of function pointer
  154.            HAL_DAC_ConvCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
  155.        (+) In case of transfer Error, HAL_DAC_ErrorCallbackCh1() function is executed and user can
  156.             add his own code by customization of function pointer HAL_DAC_ErrorCallbackCh1
  157.        (+) For STM32F100x devices with specific feature: DMA underrun.            
  158.            In case of DMA underrun, DAC interruption triggers and execute internal function HAL_DAC_IRQHandler.
  159.            HAL_DAC_DMAUnderrunCallbackCh1() or HAL_DACEx_DMAUnderrunCallbackCh2()
  160.            function is executed and user can add his own code by customization of function pointer
  161.            HAL_DAC_DMAUnderrunCallbackCh1() or HAL_DACEx_DMAUnderrunCallbackCh2() and
  162.            add his own code by customization of function pointer HAL_DAC_ErrorCallbackCh1()
  163.        (+) Stop the DAC peripheral using HAL_DAC_Stop_DMA()
  164.  
  165.     *** Callback registration ***
  166.     =============================================
  167.     [..]
  168.       The compilation define  USE_HAL_DAC_REGISTER_CALLBACKS when set to 1
  169.       allows the user to configure dynamically the driver callbacks.
  170.  
  171.     Use Functions @ref HAL_DAC_RegisterCallback() to register a user callback,
  172.       it allows to register following callbacks:
  173.       (+) ConvCpltCallbackCh1     : callback when a half transfer is completed on Ch1.
  174.       (+) ConvHalfCpltCallbackCh1 : callback when a transfer is completed on Ch1.
  175.       (+) ErrorCallbackCh1        : callback when an error occurs on Ch1.
  176.       (+) DMAUnderrunCallbackCh1  : callback when an underrun error occurs on Ch1.
  177.       (+) ConvCpltCallbackCh2     : callback when a half transfer is completed on Ch2.
  178.       (+) ConvHalfCpltCallbackCh2 : callback when a transfer is completed on Ch2.
  179.       (+) ErrorCallbackCh2        : callback when an error occurs on Ch2.
  180.       (+) DMAUnderrunCallbackCh2  : callback when an underrun error occurs on Ch2.
  181.       (+) MspInitCallback         : DAC MspInit.
  182.       (+) MspDeInitCallback       : DAC MspdeInit.
  183.       This function takes as parameters the HAL peripheral handle, the Callback ID
  184.       and a pointer to the user callback function.
  185.  
  186.     Use function @ref HAL_DAC_UnRegisterCallback() to reset a callback to the default
  187.       weak (surcharged) function. It allows to reset following callbacks:
  188.       (+) ConvCpltCallbackCh1     : callback when a half transfer is completed on Ch1.
  189.       (+) ConvHalfCpltCallbackCh1 : callback when a transfer is completed on Ch1.
  190.       (+) ErrorCallbackCh1        : callback when an error occurs on Ch1.
  191.       (+) DMAUnderrunCallbackCh1  : callback when an underrun error occurs on Ch1.
  192.       (+) ConvCpltCallbackCh2     : callback when a half transfer is completed on Ch2.
  193.       (+) ConvHalfCpltCallbackCh2 : callback when a transfer is completed on Ch2.
  194.       (+) ErrorCallbackCh2        : callback when an error occurs on Ch2.
  195.       (+) DMAUnderrunCallbackCh2  : callback when an underrun error occurs on Ch2.
  196.       (+) MspInitCallback         : DAC MspInit.
  197.       (+) MspDeInitCallback       : DAC MspdeInit.
  198.       (+) All Callbacks
  199.       This function) takes as parameters the HAL peripheral handle and the Callback ID.
  200.  
  201.       By default, after the @ref HAL_DAC_Init and if the state is HAL_DAC_STATE_RESET
  202.       all callbacks are reset to the corresponding legacy weak (surcharged) functions.
  203.       Exception done for MspInit and MspDeInit callbacks that are respectively
  204.       reset to the legacy weak (surcharged) functions in the @ref HAL_DAC_Init
  205.       and @ref  HAL_DAC_DeInit only when these callbacks are null (not registered beforehand).
  206.       If not, MspInit or MspDeInit are not null, the @ref HAL_DAC_Init and @ref HAL_DAC_DeInit
  207.       keep and use the user MspInit/MspDeInit callbacks (registered beforehand)
  208.  
  209.       Callbacks can be registered/unregistered in READY state only.
  210.       Exception done for MspInit/MspDeInit callbacks that can be registered/unregistered
  211.       in READY or RESET state, thus registered (user) MspInit/DeInit callbacks can be used
  212.       during the Init/DeInit.
  213.       In that case first register the MspInit/MspDeInit user callbacks
  214.       using @ref HAL_DAC_RegisterCallback before calling @ref HAL_DAC_DeInit
  215.       or @ref HAL_DAC_Init function.
  216.  
  217.       When The compilation define USE_HAL_DAC_REGISTER_CALLBACKS is set to 0 or
  218.       not defined, the callback registering feature is not available
  219.       and weak (surcharged) callbacks are used.
  220.  
  221.      *** DAC HAL driver macros list ***
  222.      =============================================
  223.      [..]
  224.        Below the list of most used macros in DAC HAL driver.
  225.  
  226.       (+) __HAL_DAC_ENABLE : Enable the DAC peripheral (For STM32F100x devices with specific feature: DMA underrun)
  227.       (+) __HAL_DAC_DISABLE : Disable the DAC peripheral (For STM32F100x devices with specific feature: DMA underrun)
  228.       (+) __HAL_DAC_CLEAR_FLAG: Clear the DAC's pending flags (For STM32F100x devices with specific feature: DMA underrun)
  229.       (+) __HAL_DAC_GET_FLAG: Get the selected DAC's flag status (For STM32F100x devices with specific feature: DMA underrun)
  230.  
  231.      [..]
  232.       (@) You can refer to the DAC HAL driver header file for more useful macros
  233.  
  234.  @endverbatim
  235.   ******************************************************************************
  236.   * @attention
  237.   *
  238.   * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  239.   * All rights reserved.</center></h2>
  240.   *
  241.   * This software component is licensed by ST under BSD 3-Clause license,
  242.   * the "License"; You may not use this file except in compliance with the
  243.   * License. You may obtain a copy of the License at:
  244.   *                        opensource.org/licenses/BSD-3-Clause
  245.   *
  246.   ******************************************************************************
  247.   */
  248.  
  249. /* Includes ------------------------------------------------------------------*/
  250. #include "stm32f1xx_hal.h"
  251.  
  252. /** @addtogroup STM32F1xx_HAL_Driver
  253.   * @{
  254.   */
  255.  
  256. #ifdef HAL_DAC_MODULE_ENABLED
  257. #if defined(DAC)
  258.  
  259. /** @defgroup DAC DAC
  260.   * @brief DAC driver modules
  261.   * @{
  262.   */
  263.  
  264. /* Private typedef -----------------------------------------------------------*/
  265. /* Private define ------------------------------------------------------------*/
  266. /* Private constants ---------------------------------------------------------*/
  267. /* Private macro -------------------------------------------------------------*/
  268. /* Private variables ---------------------------------------------------------*/
  269. /* Private function prototypes -----------------------------------------------*/
  270. /* Exported functions -------------------------------------------------------*/
  271.  
  272. /** @defgroup DAC_Exported_Functions DAC Exported Functions
  273.   * @{
  274.   */
  275.  
  276. /** @defgroup DAC_Exported_Functions_Group1 Initialization and de-initialization functions
  277.   *  @brief    Initialization and Configuration functions
  278.   *
  279. @verbatim
  280.   ==============================================================================
  281.               ##### Initialization and de-initialization functions #####
  282.   ==============================================================================
  283.     [..]  This section provides functions allowing to:
  284.       (+) Initialize and configure the DAC.
  285.       (+) De-initialize the DAC.
  286.  
  287. @endverbatim
  288.   * @{
  289.   */
  290.  
  291. /**
  292.   * @brief  Initialize the DAC peripheral according to the specified parameters
  293.   *         in the DAC_InitStruct and initialize the associated handle.
  294.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  295.   *         the configuration information for the specified DAC.
  296.   * @retval HAL status
  297.   */
  298. HAL_StatusTypeDef HAL_DAC_Init(DAC_HandleTypeDef *hdac)
  299. {
  300.   /* Check DAC handle */
  301.   if (hdac == NULL)
  302.   {
  303.     return HAL_ERROR;
  304.   }
  305.   /* Check the parameters */
  306.   assert_param(IS_DAC_ALL_INSTANCE(hdac->Instance));
  307.  
  308.   if (hdac->State == HAL_DAC_STATE_RESET)
  309.   {
  310. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  311.     /* Init the DAC Callback settings */
  312.     hdac->ConvCpltCallbackCh1           = HAL_DAC_ConvCpltCallbackCh1;
  313.     hdac->ConvHalfCpltCallbackCh1       = HAL_DAC_ConvHalfCpltCallbackCh1;
  314.     hdac->ErrorCallbackCh1              = HAL_DAC_ErrorCallbackCh1;
  315.     hdac->DMAUnderrunCallbackCh1        = HAL_DAC_DMAUnderrunCallbackCh1;
  316.  
  317.     hdac->ConvCpltCallbackCh2           = HAL_DACEx_ConvCpltCallbackCh2;
  318.     hdac->ConvHalfCpltCallbackCh2       = HAL_DACEx_ConvHalfCpltCallbackCh2;
  319.     hdac->ErrorCallbackCh2              = HAL_DACEx_ErrorCallbackCh2;
  320.     hdac->DMAUnderrunCallbackCh2        = HAL_DACEx_DMAUnderrunCallbackCh2;
  321.  
  322.     if (hdac->MspInitCallback == NULL)
  323.     {
  324.       hdac->MspInitCallback             = HAL_DAC_MspInit;
  325.     }
  326. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  327.  
  328.     /* Allocate lock resource and initialize it */
  329.     hdac->Lock = HAL_UNLOCKED;
  330.  
  331. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  332.     /* Init the low level hardware */
  333.     hdac->MspInitCallback(hdac);
  334. #else
  335.     /* Init the low level hardware */
  336.     HAL_DAC_MspInit(hdac);
  337. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  338.   }
  339.  
  340.   /* Initialize the DAC state*/
  341.   hdac->State = HAL_DAC_STATE_BUSY;
  342.  
  343.   /* Set DAC error code to none */
  344.   hdac->ErrorCode = HAL_DAC_ERROR_NONE;
  345.  
  346.   /* Initialize the DAC state*/
  347.   hdac->State = HAL_DAC_STATE_READY;
  348.  
  349.   /* Return function status */
  350.   return HAL_OK;
  351. }
  352.  
  353. /**
  354.   * @brief  Deinitialize the DAC peripheral registers to their default reset values.
  355.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  356.   *         the configuration information for the specified DAC.
  357.   * @retval HAL status
  358.   */
  359. HAL_StatusTypeDef HAL_DAC_DeInit(DAC_HandleTypeDef *hdac)
  360. {
  361.   /* Check DAC handle */
  362.   if (hdac == NULL)
  363.   {
  364.     return HAL_ERROR;
  365.   }
  366.  
  367.   /* Check the parameters */
  368.   assert_param(IS_DAC_ALL_INSTANCE(hdac->Instance));
  369.  
  370.   /* Change DAC state */
  371.   hdac->State = HAL_DAC_STATE_BUSY;
  372.  
  373. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  374.   if (hdac->MspDeInitCallback == NULL)
  375.   {
  376.     hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  377.   }
  378.   /* DeInit the low level hardware */
  379.   hdac->MspDeInitCallback(hdac);
  380. #else
  381.   /* DeInit the low level hardware */
  382.   HAL_DAC_MspDeInit(hdac);
  383. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  384.  
  385.   /* Set DAC error code to none */
  386.   hdac->ErrorCode = HAL_DAC_ERROR_NONE;
  387.  
  388.   /* Change DAC state */
  389.   hdac->State = HAL_DAC_STATE_RESET;
  390.  
  391.   /* Release Lock */
  392.   __HAL_UNLOCK(hdac);
  393.  
  394.   /* Return function status */
  395.   return HAL_OK;
  396. }
  397.  
  398. /**
  399.   * @brief  Initialize 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_MspInit(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_MspInit could be implemented in the user file
  411.    */
  412. }
  413.  
  414. /**
  415.   * @brief  DeInitialize the DAC MSP.
  416.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  417.   *         the configuration information for the specified DAC.
  418.   * @retval None
  419.   */
  420. __weak void HAL_DAC_MspDeInit(DAC_HandleTypeDef *hdac)
  421. {
  422.   /* Prevent unused argument(s) compilation warning */
  423.   UNUSED(hdac);
  424.  
  425.   /* NOTE : This function should not be modified, when the callback is needed,
  426.             the HAL_DAC_MspDeInit could be implemented in the user file
  427.    */
  428. }
  429.  
  430. /**
  431.   * @}
  432.   */
  433.  
  434. /** @defgroup DAC_Exported_Functions_Group2 IO operation functions
  435.   *  @brief    IO operation functions
  436.   *
  437. @verbatim
  438.   ==============================================================================
  439.              ##### IO operation functions #####
  440.   ==============================================================================
  441.     [..]  This section provides functions allowing to:
  442.       (+) Start conversion.
  443.       (+) Stop conversion.
  444.       (+) Start conversion and enable DMA transfer.
  445.       (+) Stop conversion and disable DMA transfer.
  446.       (+) Get result of conversion.
  447.  
  448. @endverbatim
  449.   * @{
  450.   */
  451.  
  452. /**
  453.   * @brief  Enables DAC and starts conversion of channel.
  454.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  455.   *         the configuration information for the specified DAC.
  456.   * @param  Channel The selected DAC channel.
  457.   *          This parameter can be one of the following values:
  458.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  459.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  460.   * @retval HAL status
  461.   */
  462. HAL_StatusTypeDef HAL_DAC_Start(DAC_HandleTypeDef *hdac, uint32_t Channel)
  463. {
  464.   /* Check the parameters */
  465.   assert_param(IS_DAC_CHANNEL(Channel));
  466.  
  467.   /* Process locked */
  468.   __HAL_LOCK(hdac);
  469.  
  470.   /* Change DAC state */
  471.   hdac->State = HAL_DAC_STATE_BUSY;
  472.  
  473.   /* Enable the Peripheral */
  474.   __HAL_DAC_ENABLE(hdac, Channel);
  475.  
  476.   if (Channel == DAC_CHANNEL_1)
  477.   {
  478.     /* Check if software trigger enabled */
  479.     if ((hdac->Instance->CR & (DAC_CR_TEN1 | DAC_CR_TSEL1)) == DAC_TRIGGER_SOFTWARE)
  480.     {
  481.       /* Enable the selected DAC software conversion */
  482.       SET_BIT(hdac->Instance->SWTRIGR, DAC_SWTRIGR_SWTRIG1);
  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.   /* Change DAC state */
  496.   hdac->State = HAL_DAC_STATE_READY;
  497.  
  498.   /* Process unlocked */
  499.   __HAL_UNLOCK(hdac);
  500.  
  501.   /* Return function status */
  502.   return HAL_OK;
  503. }
  504.  
  505. /**
  506.   * @brief  Disables DAC and stop conversion of channel.
  507.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  508.   *         the configuration information for the specified DAC.
  509.   * @param  Channel The selected DAC channel.
  510.   *          This parameter can be one of the following values:
  511.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  512.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  513.   * @retval HAL status
  514.   */
  515. HAL_StatusTypeDef HAL_DAC_Stop(DAC_HandleTypeDef *hdac, uint32_t Channel)
  516. {
  517.   /* Check the parameters */
  518.   assert_param(IS_DAC_CHANNEL(Channel));
  519.  
  520.   /* Disable the Peripheral */
  521.   __HAL_DAC_DISABLE(hdac, Channel);
  522.  
  523.   /* Change DAC state */
  524.   hdac->State = HAL_DAC_STATE_READY;
  525.  
  526.   /* Return function status */
  527.   return HAL_OK;
  528. }
  529.  
  530. /**
  531.   * @brief  Enables DAC and starts conversion of channel.
  532.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  533.   *         the configuration information for the specified DAC.
  534.   * @param  Channel The selected DAC channel.
  535.   *          This parameter can be one of the following values:
  536.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  537.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  538.   * @param  pData The destination peripheral Buffer address.
  539.   * @param  Length The length of data to be transferred from memory to DAC peripheral
  540.   * @param  Alignment Specifies the data alignment for DAC channel.
  541.   *          This parameter can be one of the following values:
  542.   *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
  543.   *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
  544.   *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
  545.   * @retval HAL status
  546.   */
  547. HAL_StatusTypeDef HAL_DAC_Start_DMA(DAC_HandleTypeDef *hdac, uint32_t Channel, uint32_t *pData, uint32_t Length,
  548.                                     uint32_t Alignment)
  549. {
  550.   HAL_StatusTypeDef status;
  551.   uint32_t tmpreg = 0U;
  552.  
  553.   /* Check the parameters */
  554.   assert_param(IS_DAC_CHANNEL(Channel));
  555.   assert_param(IS_DAC_ALIGN(Alignment));
  556.  
  557.   /* Process locked */
  558.   __HAL_LOCK(hdac);
  559.  
  560.   /* Change DAC state */
  561.   hdac->State = HAL_DAC_STATE_BUSY;
  562.  
  563.   if (Channel == DAC_CHANNEL_1)
  564.   {
  565.     /* Set the DMA transfer complete callback for channel1 */
  566.     hdac->DMA_Handle1->XferCpltCallback = DAC_DMAConvCpltCh1;
  567.  
  568.     /* Set the DMA half transfer complete callback for channel1 */
  569.     hdac->DMA_Handle1->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh1;
  570.  
  571.     /* Set the DMA error callback for channel1 */
  572.     hdac->DMA_Handle1->XferErrorCallback = DAC_DMAErrorCh1;
  573.  
  574.     /* Enable the selected DAC channel1 DMA request */
  575.     SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN1);
  576.  
  577.     /* Case of use of channel 1 */
  578.     switch (Alignment)
  579.     {
  580.       case DAC_ALIGN_12B_R:
  581.         /* Get DHR12R1 address */
  582.         tmpreg = (uint32_t)&hdac->Instance->DHR12R1;
  583.         break;
  584.       case DAC_ALIGN_12B_L:
  585.         /* Get DHR12L1 address */
  586.         tmpreg = (uint32_t)&hdac->Instance->DHR12L1;
  587.         break;
  588.       case DAC_ALIGN_8B_R:
  589.         /* Get DHR8R1 address */
  590.         tmpreg = (uint32_t)&hdac->Instance->DHR8R1;
  591.         break;
  592.       default:
  593.         break;
  594.     }
  595.   }
  596.   else
  597.   {
  598.     /* Set the DMA transfer complete callback for channel2 */
  599.     hdac->DMA_Handle2->XferCpltCallback = DAC_DMAConvCpltCh2;
  600.  
  601.     /* Set the DMA half transfer complete callback for channel2 */
  602.     hdac->DMA_Handle2->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh2;
  603.  
  604.     /* Set the DMA error callback for channel2 */
  605.     hdac->DMA_Handle2->XferErrorCallback = DAC_DMAErrorCh2;
  606.  
  607.     /* Enable the selected DAC channel2 DMA request */
  608.     SET_BIT(hdac->Instance->CR, DAC_CR_DMAEN2);
  609.  
  610.     /* Case of use of channel 2 */
  611.     switch (Alignment)
  612.     {
  613.       case DAC_ALIGN_12B_R:
  614.         /* Get DHR12R2 address */
  615.         tmpreg = (uint32_t)&hdac->Instance->DHR12R2;
  616.         break;
  617.       case DAC_ALIGN_12B_L:
  618.         /* Get DHR12L2 address */
  619.         tmpreg = (uint32_t)&hdac->Instance->DHR12L2;
  620.         break;
  621.       case DAC_ALIGN_8B_R:
  622.         /* Get DHR8R2 address */
  623.         tmpreg = (uint32_t)&hdac->Instance->DHR8R2;
  624.         break;
  625.       default:
  626.         break;
  627.     }
  628.   }
  629.  
  630.   /* Enable the DMA Stream */
  631.   if (Channel == DAC_CHANNEL_1)
  632.   {
  633. #if defined(DAC_CR_DMAUDRIE1)
  634.     /* Enable the DAC DMA underrun interrupt */
  635.     __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR1);
  636. #endif /* DAC_CR_DMAUDRIE1 */
  637.    /* Enable the DMA Stream */
  638.     status = HAL_DMA_Start_IT(hdac->DMA_Handle1, (uint32_t)pData, tmpreg, Length);
  639.   }
  640.   else
  641.   {
  642. #if defined(DAC_CR_DMAUDRIE2)
  643.     /* Enable the DAC DMA underrun interrupt */
  644.     __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR2);
  645. #endif /* DAC_CR_DMAUDRIE2 */
  646.     /* Enable the DMA Stream */
  647.     status = HAL_DMA_Start_IT(hdac->DMA_Handle2, (uint32_t)pData, tmpreg, Length);
  648.   }
  649.  
  650.   /* Process Unlocked */
  651.   __HAL_UNLOCK(hdac);
  652.  
  653.   if (status == HAL_OK)
  654.   {
  655.     /* Enable the Peripheral */
  656.     __HAL_DAC_ENABLE(hdac, Channel);
  657.   }
  658.   else
  659.   {
  660.     hdac->ErrorCode |= HAL_DAC_ERROR_DMA;
  661.   }
  662.  
  663.   /* Return function status */
  664.   return status;
  665. }
  666.  
  667. /**
  668.   * @brief  Disables DAC and stop conversion of channel.
  669.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  670.   *         the configuration information for the specified DAC.
  671.   * @param  Channel The selected DAC channel.
  672.   *          This parameter can be one of the following values:
  673.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  674.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  675.   * @retval HAL status
  676.   */
  677. HAL_StatusTypeDef HAL_DAC_Stop_DMA(DAC_HandleTypeDef *hdac, uint32_t Channel)
  678. {
  679.   HAL_StatusTypeDef status;
  680.  
  681.   /* Check the parameters */
  682.   assert_param(IS_DAC_CHANNEL(Channel));
  683.  
  684.   /* Disable the selected DAC channel DMA request */
  685.   hdac->Instance->CR &= ~(DAC_CR_DMAEN1 << (Channel & 0x10UL));
  686.  
  687.   /* Disable the Peripheral */
  688.   __HAL_DAC_DISABLE(hdac, Channel);
  689.  
  690.   /* Disable the DMA Stream */
  691.  
  692.   /* Channel1 is used */
  693.   if (Channel == DAC_CHANNEL_1)
  694.   {
  695.     /* Disable the DMA Stream */
  696.     status = HAL_DMA_Abort(hdac->DMA_Handle1);
  697. #if defined(DAC_CR_DMAUDRIE1)
  698.     /* Disable the DAC DMA underrun interrupt */
  699.     __HAL_DAC_DISABLE_IT(hdac, DAC_IT_DMAUDR1);
  700. #endif /* DAC_CR_DMAUDRIE1 */
  701.   }
  702.   else /* Channel2 is used for */
  703.   {
  704.     /* Disable the DMA Stream */
  705.     status = HAL_DMA_Abort(hdac->DMA_Handle2);
  706. #if defined(DAC_CR_DMAUDRIE2)
  707.     /* Disable the DAC DMA underrun interrupt */
  708.     __HAL_DAC_DISABLE_IT(hdac, DAC_IT_DMAUDR2);
  709. #endif /* DAC_CR_DMAUDRIE2 */
  710.   }
  711.  
  712.   /* Check if DMA Stream effectively disabled */
  713.   if (status != HAL_OK)
  714.   {
  715.     /* Update DAC state machine to error */
  716.     hdac->State = HAL_DAC_STATE_ERROR;
  717.   }
  718.   else
  719.   {
  720.     /* Change DAC state */
  721.     hdac->State = HAL_DAC_STATE_READY;
  722.   }
  723.  
  724.   /* Return function status */
  725.   return status;
  726. }
  727.  
  728. /**
  729.   * @brief  Handles DAC interrupt request
  730.   *         This function uses the interruption of DMA
  731.   *         underrun.
  732.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  733.   *         the configuration information for the specified DAC.
  734.   * @retval None
  735.   */
  736. void HAL_DAC_IRQHandler(DAC_HandleTypeDef *hdac)
  737. {
  738. #if defined(DAC_SR_DMAUDR1)
  739.   if (__HAL_DAC_GET_IT_SOURCE(hdac, DAC_IT_DMAUDR1))
  740.   {
  741.     /* Check underrun flag of DAC channel 1 */
  742.     if (__HAL_DAC_GET_FLAG(hdac, DAC_FLAG_DMAUDR1))
  743.     {
  744.       /* Change DAC state to error state */
  745.       hdac->State = HAL_DAC_STATE_ERROR;
  746.  
  747.       /* Set DAC error code to chanel1 DMA underrun error */
  748.       SET_BIT(hdac->ErrorCode, HAL_DAC_ERROR_DMAUNDERRUNCH1);
  749.  
  750.       /* Clear the underrun flag */
  751.       __HAL_DAC_CLEAR_FLAG(hdac, DAC_FLAG_DMAUDR1);
  752.  
  753.       /* Disable the selected DAC channel1 DMA request */
  754.       CLEAR_BIT(hdac->Instance->CR, DAC_CR_DMAEN1);
  755.  
  756.       /* Error callback */
  757. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  758.       hdac->DMAUnderrunCallbackCh1(hdac);
  759. #else
  760.       HAL_DAC_DMAUnderrunCallbackCh1(hdac);
  761. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  762.     }
  763.   }
  764. #endif /* DAC_SR_DMAUDR1 */
  765.  
  766. #if defined(DAC_SR_DMAUDR2)
  767.   if (__HAL_DAC_GET_IT_SOURCE(hdac, DAC_IT_DMAUDR2))
  768.   {
  769.     /* Check underrun flag of DAC channel 2 */
  770.     if (__HAL_DAC_GET_FLAG(hdac, DAC_FLAG_DMAUDR2))
  771.     {
  772.       /* Change DAC state to error state */
  773.       hdac->State = HAL_DAC_STATE_ERROR;
  774.  
  775.       /* Set DAC error code to channel2 DMA underrun error */
  776.       SET_BIT(hdac->ErrorCode, HAL_DAC_ERROR_DMAUNDERRUNCH2);
  777.  
  778.       /* Clear the underrun flag */
  779.       __HAL_DAC_CLEAR_FLAG(hdac, DAC_FLAG_DMAUDR2);
  780.  
  781.       /* Disable the selected DAC channel2 DMA request */
  782.       CLEAR_BIT(hdac->Instance->CR, DAC_CR_DMAEN2);
  783.  
  784.       /* Error callback */
  785. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  786.       hdac->DMAUnderrunCallbackCh2(hdac);
  787. #else
  788.       HAL_DACEx_DMAUnderrunCallbackCh2(hdac);
  789. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  790.     }
  791.   }
  792. #endif /* DAC_SR_DMAUDR2 */
  793. }
  794.  
  795. /**
  796.   * @brief  Set the specified data holding register value for DAC channel.
  797.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  798.   *         the configuration information for the specified DAC.
  799.   * @param  Channel The selected DAC channel.
  800.   *          This parameter can be one of the following values:
  801.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  802.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  803.   * @param  Alignment Specifies the data alignment.
  804.   *          This parameter can be one of the following values:
  805.   *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
  806.   *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
  807.   *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
  808.   * @param  Data Data to be loaded in the selected data holding register.
  809.   * @retval HAL status
  810.   */
  811. HAL_StatusTypeDef HAL_DAC_SetValue(DAC_HandleTypeDef *hdac, uint32_t Channel, uint32_t Alignment, uint32_t Data)
  812. {
  813.   __IO uint32_t tmp = 0;
  814.  
  815.   /* Check the parameters */
  816.   assert_param(IS_DAC_CHANNEL(Channel));
  817.   assert_param(IS_DAC_ALIGN(Alignment));
  818.   assert_param(IS_DAC_DATA(Data));
  819.  
  820.   tmp = (uint32_t)hdac->Instance;
  821.   if (Channel == DAC_CHANNEL_1)
  822.   {
  823.     tmp += DAC_DHR12R1_ALIGNMENT(Alignment);
  824.   }
  825.   else
  826.   {
  827.     tmp += DAC_DHR12R2_ALIGNMENT(Alignment);
  828.   }
  829.  
  830.   /* Set the DAC channel selected data holding register */
  831.   *(__IO uint32_t *) tmp = Data;
  832.  
  833.   /* Return function status */
  834.   return HAL_OK;
  835. }
  836.  
  837. /**
  838.   * @brief  Conversion complete callback in non-blocking mode for Channel1
  839.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  840.   *         the configuration information for the specified DAC.
  841.   * @retval None
  842.   */
  843. __weak void HAL_DAC_ConvCpltCallbackCh1(DAC_HandleTypeDef *hdac)
  844. {
  845.   /* Prevent unused argument(s) compilation warning */
  846.   UNUSED(hdac);
  847.  
  848.   /* NOTE : This function should not be modified, when the callback is needed,
  849.             the HAL_DAC_ConvCpltCallbackCh1 could be implemented in the user file
  850.    */
  851. }
  852.  
  853. /**
  854.   * @brief  Conversion half DMA transfer callback in non-blocking mode for Channel1
  855.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  856.   *         the configuration information for the specified DAC.
  857.   * @retval None
  858.   */
  859. __weak void HAL_DAC_ConvHalfCpltCallbackCh1(DAC_HandleTypeDef *hdac)
  860. {
  861.   /* Prevent unused argument(s) compilation warning */
  862.   UNUSED(hdac);
  863.  
  864.   /* NOTE : This function should not be modified, when the callback is needed,
  865.             the HAL_DAC_ConvHalfCpltCallbackCh1 could be implemented in the user file
  866.    */
  867. }
  868.  
  869. /**
  870.   * @brief  Error DAC callback for Channel1.
  871.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  872.   *         the configuration information for the specified DAC.
  873.   * @retval None
  874.   */
  875. __weak void HAL_DAC_ErrorCallbackCh1(DAC_HandleTypeDef *hdac)
  876. {
  877.   /* Prevent unused argument(s) compilation warning */
  878.   UNUSED(hdac);
  879.  
  880.   /* NOTE : This function should not be modified, when the callback is needed,
  881.             the HAL_DAC_ErrorCallbackCh1 could be implemented in the user file
  882.    */
  883. }
  884.  
  885. /**
  886.   * @brief  DMA underrun DAC callback for channel1.
  887.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  888.   *         the configuration information for the specified DAC.
  889.   * @retval None
  890.   */
  891. __weak void HAL_DAC_DMAUnderrunCallbackCh1(DAC_HandleTypeDef *hdac)
  892. {
  893.   /* Prevent unused argument(s) compilation warning */
  894.   UNUSED(hdac);
  895.  
  896.   /* NOTE : This function should not be modified, when the callback is needed,
  897.             the HAL_DAC_DMAUnderrunCallbackCh1 could be implemented in the user file
  898.    */
  899. }
  900.  
  901. /**
  902.   * @}
  903.   */
  904.  
  905. /** @defgroup DAC_Exported_Functions_Group3 Peripheral Control functions
  906.   *  @brief    Peripheral Control functions
  907.   *
  908. @verbatim
  909.   ==============================================================================
  910.              ##### Peripheral Control functions #####
  911.   ==============================================================================
  912.     [..]  This section provides functions allowing to:
  913.       (+) Configure channels.
  914.       (+) Set the specified data holding register value for DAC channel.
  915.  
  916. @endverbatim
  917.   * @{
  918.   */
  919.  
  920. /**
  921.   * @brief  Returns the last data output value of the selected DAC channel.
  922.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  923.   *         the configuration information for the specified DAC.
  924.   * @param  Channel The selected DAC channel.
  925.   *          This parameter can be one of the following values:
  926.   *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  927.   *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  928.   * @retval The selected DAC channel data output value.
  929.   */
  930. uint32_t HAL_DAC_GetValue(DAC_HandleTypeDef *hdac, uint32_t Channel)
  931. {
  932.   /* Check the parameters */
  933.   assert_param(IS_DAC_CHANNEL(Channel));
  934.  
  935.   /* Returns the DAC channel data output register value */
  936.   if (Channel == DAC_CHANNEL_1)
  937.   {
  938.     return hdac->Instance->DOR1;
  939.   }
  940.   else
  941.   {
  942.     return hdac->Instance->DOR2;
  943.   }
  944. }
  945.  
  946. /**
  947.   * @brief  Configures the selected DAC channel.
  948.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  949.   *         the configuration information for the specified DAC.
  950.   * @param  sConfig DAC configuration structure.
  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 HAL status
  956.   */
  957. HAL_StatusTypeDef HAL_DAC_ConfigChannel(DAC_HandleTypeDef *hdac, DAC_ChannelConfTypeDef *sConfig, uint32_t Channel)
  958. {
  959.   uint32_t tmpreg1;
  960.   uint32_t tmpreg2;
  961.  
  962.   /* Check the DAC parameters */
  963.   assert_param(IS_DAC_TRIGGER(sConfig->DAC_Trigger));
  964.   assert_param(IS_DAC_OUTPUT_BUFFER_STATE(sConfig->DAC_OutputBuffer));
  965.   assert_param(IS_DAC_CHANNEL(Channel));
  966.  
  967.   /* Process locked */
  968.   __HAL_LOCK(hdac);
  969.  
  970.   /* Change DAC state */
  971.   hdac->State = HAL_DAC_STATE_BUSY;
  972.  
  973.   /* Get the DAC CR value */
  974.   tmpreg1 = hdac->Instance->CR;
  975.   /* Clear BOFFx, TENx, TSELx, WAVEx and MAMPx bits */
  976.   tmpreg1 &= ~(((uint32_t)(DAC_CR_MAMP1 | DAC_CR_WAVE1 | DAC_CR_TSEL1 | DAC_CR_TEN1 | DAC_CR_BOFF1)) << (Channel & 0x10UL));
  977.   /* Configure for the selected DAC channel: buffer output, trigger */
  978.   /* Set TSELx and TENx bits according to DAC_Trigger value */
  979.   /* Set BOFFx bit according to DAC_OutputBuffer value */  
  980.   tmpreg2 = (sConfig->DAC_Trigger | sConfig->DAC_OutputBuffer);
  981.   /* Calculate CR register value depending on DAC_Channel */
  982.   tmpreg1 |= tmpreg2 << (Channel & 0x10UL);
  983.   /* Write to DAC CR */
  984.   hdac->Instance->CR = tmpreg1;
  985.   /* Disable wave generation */
  986.   CLEAR_BIT(hdac->Instance->CR, (DAC_CR_WAVE1 << (Channel & 0x10UL)));
  987.   /* Disable wave generation */
  988.   hdac->Instance->CR &= ~(DAC_CR_WAVE1 << (Channel & 0x10UL));
  989.  
  990.   /* Change DAC state */
  991.   hdac->State = HAL_DAC_STATE_READY;
  992.  
  993.   /* Process unlocked */
  994.   __HAL_UNLOCK(hdac);
  995.  
  996.   /* Return function status */
  997.   return HAL_OK;
  998. }
  999.  
  1000. /**
  1001.   * @}
  1002.   */
  1003.  
  1004. /** @defgroup DAC_Exported_Functions_Group4 Peripheral State and Errors functions
  1005.   *  @brief   Peripheral State and Errors functions
  1006.   *
  1007. @verbatim
  1008.   ==============================================================================
  1009.             ##### Peripheral State and Errors functions #####
  1010.   ==============================================================================
  1011.     [..]
  1012.     This subsection provides functions allowing to
  1013.       (+) Check the DAC state.
  1014.       (+) Check the DAC Errors.
  1015.  
  1016. @endverbatim
  1017.   * @{
  1018.   */
  1019.  
  1020. /**
  1021.   * @brief  return the DAC handle state
  1022.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  1023.   *         the configuration information for the specified DAC.
  1024.   * @retval HAL state
  1025.   */
  1026. HAL_DAC_StateTypeDef HAL_DAC_GetState(DAC_HandleTypeDef *hdac)
  1027. {
  1028.   /* Return DAC handle state */
  1029.   return hdac->State;
  1030. }
  1031.  
  1032.  
  1033. /**
  1034.   * @brief  Return the DAC error code
  1035.   * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  1036.   *         the configuration information for the specified DAC.
  1037.   * @retval DAC Error Code
  1038.   */
  1039. uint32_t HAL_DAC_GetError(DAC_HandleTypeDef *hdac)
  1040. {
  1041.   return hdac->ErrorCode;
  1042. }
  1043.  
  1044. /**
  1045.   * @}
  1046.   */
  1047.  
  1048. /**
  1049.   * @}
  1050.   */
  1051.  
  1052. /** @addtogroup DAC_Exported_Functions
  1053.   * @{
  1054.   */
  1055.  
  1056. /** @addtogroup DAC_Exported_Functions_Group1
  1057.   * @{
  1058.   */
  1059. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1060. /**
  1061.   * @brief  Register a User DAC Callback
  1062.   *         To be used instead of the weak (surcharged) predefined callback
  1063.   * @param  hdac DAC handle
  1064.   * @param  CallbackID ID of the callback to be registered
  1065.   *         This parameter can be one of the following values:
  1066.   *          @arg @ref HAL_DAC_ERROR_INVALID_CALLBACK   DAC Error Callback ID
  1067.   *          @arg @ref HAL_DAC_CH1_COMPLETE_CB_ID       DAC CH1 Complete Callback ID
  1068.   *          @arg @ref HAL_DAC_CH1_HALF_COMPLETE_CB_ID  DAC CH1 Half Complete Callback ID
  1069.   *          @arg @ref HAL_DAC_CH1_ERROR_ID             DAC CH1 Error Callback ID
  1070.   *          @arg @ref HAL_DAC_CH1_UNDERRUN_CB_ID       DAC CH1 UnderRun Callback ID
  1071.   *          @arg @ref HAL_DAC_CH2_COMPLETE_CB_ID       DAC CH2 Complete Callback ID
  1072.   *          @arg @ref HAL_DAC_CH2_HALF_COMPLETE_CB_ID  DAC CH2 Half Complete Callback ID
  1073.   *          @arg @ref HAL_DAC_CH2_ERROR_ID             DAC CH2 Error Callback ID
  1074.   *          @arg @ref HAL_DAC_CH2_UNDERRUN_CB_ID       DAC CH2 UnderRun Callback ID
  1075.   *          @arg @ref HAL_DAC_MSPINIT_CB_ID            DAC MSP Init Callback ID
  1076.   *          @arg @ref HAL_DAC_MSPDEINIT_CB_ID          DAC MSP DeInit Callback ID
  1077.   *
  1078.   * @param  pCallback pointer to the Callback function
  1079.   * @retval status
  1080.   */
  1081. HAL_StatusTypeDef HAL_DAC_RegisterCallback(DAC_HandleTypeDef *hdac, HAL_DAC_CallbackIDTypeDef CallbackID,
  1082.                                            pDAC_CallbackTypeDef pCallback)
  1083. {
  1084.   HAL_StatusTypeDef status = HAL_OK;
  1085.  
  1086.   if (pCallback == NULL)
  1087.   {
  1088.     /* Update the error code */
  1089.     hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1090.     return HAL_ERROR;
  1091.   }
  1092.  
  1093.   /* Process locked */
  1094.   __HAL_LOCK(hdac);
  1095.  
  1096.   if (hdac->State == HAL_DAC_STATE_READY)
  1097.   {
  1098.     switch (CallbackID)
  1099.     {
  1100.       case HAL_DAC_CH1_COMPLETE_CB_ID :
  1101.         hdac->ConvCpltCallbackCh1 = pCallback;
  1102.         break;
  1103.       case HAL_DAC_CH1_HALF_COMPLETE_CB_ID :
  1104.         hdac->ConvHalfCpltCallbackCh1 = pCallback;
  1105.         break;
  1106.       case HAL_DAC_CH1_ERROR_ID :
  1107.         hdac->ErrorCallbackCh1 = pCallback;
  1108.         break;
  1109.       case HAL_DAC_CH1_UNDERRUN_CB_ID :
  1110.         hdac->DMAUnderrunCallbackCh1 = pCallback;
  1111.         break;
  1112.       case HAL_DAC_CH2_COMPLETE_CB_ID :
  1113.         hdac->ConvCpltCallbackCh2 = pCallback;
  1114.         break;
  1115.       case HAL_DAC_CH2_HALF_COMPLETE_CB_ID :
  1116.         hdac->ConvHalfCpltCallbackCh2 = pCallback;
  1117.         break;
  1118.       case HAL_DAC_CH2_ERROR_ID :
  1119.         hdac->ErrorCallbackCh2 = pCallback;
  1120.         break;
  1121.       case HAL_DAC_CH2_UNDERRUN_CB_ID :
  1122.         hdac->DMAUnderrunCallbackCh2 = pCallback;
  1123.         break;
  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 if (hdac->State == HAL_DAC_STATE_RESET)
  1139.   {
  1140.     switch (CallbackID)
  1141.     {
  1142.       case HAL_DAC_MSPINIT_CB_ID :
  1143.         hdac->MspInitCallback = pCallback;
  1144.         break;
  1145.       case HAL_DAC_MSPDEINIT_CB_ID :
  1146.         hdac->MspDeInitCallback = pCallback;
  1147.         break;
  1148.       default :
  1149.         /* Update the error code */
  1150.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1151.         /* update return status */
  1152.         status =  HAL_ERROR;
  1153.         break;
  1154.     }
  1155.   }
  1156.   else
  1157.   {
  1158.     /* Update the error code */
  1159.     hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1160.     /* update return status */
  1161.     status =  HAL_ERROR;
  1162.   }
  1163.  
  1164.   /* Release Lock */
  1165.   __HAL_UNLOCK(hdac);
  1166.   return status;
  1167. }
  1168.  
  1169. /**
  1170.   * @brief  Unregister a User DAC Callback
  1171.   *         DAC Callback is redirected to the weak (surcharged) predefined callback
  1172.   * @param  hdac DAC handle
  1173.   * @param  CallbackID ID of the callback to be unregistered
  1174.   *         This parameter can be one of the following values:
  1175.   *          @arg @ref HAL_DAC_CH1_COMPLETE_CB_ID          DAC CH1 tranfer Complete Callback ID
  1176.   *          @arg @ref HAL_DAC_CH1_HALF_COMPLETE_CB_ID     DAC CH1 Half Complete Callback ID
  1177.   *          @arg @ref HAL_DAC_CH1_ERROR_ID                DAC CH1 Error Callback ID
  1178.   *          @arg @ref HAL_DAC_CH1_UNDERRUN_CB_ID          DAC CH1 UnderRun Callback ID
  1179.   *          @arg @ref HAL_DAC_CH2_COMPLETE_CB_ID          DAC CH2 Complete Callback ID
  1180.   *          @arg @ref HAL_DAC_CH2_HALF_COMPLETE_CB_ID     DAC CH2 Half Complete Callback ID
  1181.   *          @arg @ref HAL_DAC_CH2_ERROR_ID                DAC CH2 Error Callback ID
  1182.   *          @arg @ref HAL_DAC_CH2_UNDERRUN_CB_ID          DAC CH2 UnderRun Callback ID
  1183.   *          @arg @ref HAL_DAC_MSPINIT_CB_ID               DAC MSP Init Callback ID
  1184.   *          @arg @ref HAL_DAC_MSPDEINIT_CB_ID             DAC MSP DeInit Callback ID
  1185.   *          @arg @ref HAL_DAC_ALL_CB_ID                   DAC All callbacks
  1186.   * @retval status
  1187.   */
  1188. HAL_StatusTypeDef HAL_DAC_UnRegisterCallback(DAC_HandleTypeDef *hdac, HAL_DAC_CallbackIDTypeDef CallbackID)
  1189. {
  1190.   HAL_StatusTypeDef status = HAL_OK;
  1191.  
  1192.   /* Process locked */
  1193.   __HAL_LOCK(hdac);
  1194.  
  1195.   if (hdac->State == HAL_DAC_STATE_READY)
  1196.   {
  1197.     switch (CallbackID)
  1198.     {
  1199.       case HAL_DAC_CH1_COMPLETE_CB_ID :
  1200.         hdac->ConvCpltCallbackCh1 = HAL_DAC_ConvCpltCallbackCh1;
  1201.         break;
  1202.       case HAL_DAC_CH1_HALF_COMPLETE_CB_ID :
  1203.         hdac->ConvHalfCpltCallbackCh1 = HAL_DAC_ConvHalfCpltCallbackCh1;
  1204.         break;
  1205.       case HAL_DAC_CH1_ERROR_ID :
  1206.         hdac->ErrorCallbackCh1 = HAL_DAC_ErrorCallbackCh1;
  1207.         break;
  1208.       case HAL_DAC_CH1_UNDERRUN_CB_ID :
  1209.         hdac->DMAUnderrunCallbackCh1 = HAL_DAC_DMAUnderrunCallbackCh1;
  1210.         break;
  1211.       case HAL_DAC_CH2_COMPLETE_CB_ID :
  1212.         hdac->ConvCpltCallbackCh2 = HAL_DACEx_ConvCpltCallbackCh2;
  1213.         break;
  1214.       case HAL_DAC_CH2_HALF_COMPLETE_CB_ID :
  1215.         hdac->ConvHalfCpltCallbackCh2 = HAL_DACEx_ConvHalfCpltCallbackCh2;
  1216.         break;
  1217.       case HAL_DAC_CH2_ERROR_ID :
  1218.         hdac->ErrorCallbackCh2 = HAL_DACEx_ErrorCallbackCh2;
  1219.         break;
  1220.       case HAL_DAC_CH2_UNDERRUN_CB_ID :
  1221.         hdac->DMAUnderrunCallbackCh2 = HAL_DACEx_DMAUnderrunCallbackCh2;
  1222.         break;
  1223.       case HAL_DAC_MSPINIT_CB_ID :
  1224.         hdac->MspInitCallback = HAL_DAC_MspInit;
  1225.         break;
  1226.       case HAL_DAC_MSPDEINIT_CB_ID :
  1227.         hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  1228.         break;
  1229.       case HAL_DAC_ALL_CB_ID :
  1230.         hdac->ConvCpltCallbackCh1 = HAL_DAC_ConvCpltCallbackCh1;
  1231.         hdac->ConvHalfCpltCallbackCh1 = HAL_DAC_ConvHalfCpltCallbackCh1;
  1232.         hdac->ErrorCallbackCh1 = HAL_DAC_ErrorCallbackCh1;
  1233.         hdac->DMAUnderrunCallbackCh1 = HAL_DAC_DMAUnderrunCallbackCh1;
  1234.         hdac->ConvCpltCallbackCh2 = HAL_DACEx_ConvCpltCallbackCh2;
  1235.         hdac->ConvHalfCpltCallbackCh2 = HAL_DACEx_ConvHalfCpltCallbackCh2;
  1236.         hdac->ErrorCallbackCh2 = HAL_DACEx_ErrorCallbackCh2;
  1237.         hdac->DMAUnderrunCallbackCh2 = HAL_DACEx_DMAUnderrunCallbackCh2;
  1238.         hdac->MspInitCallback = HAL_DAC_MspInit;
  1239.         hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  1240.         break;
  1241.       default :
  1242.         /* Update the error code */
  1243.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1244.         /* update return status */
  1245.         status =  HAL_ERROR;
  1246.         break;
  1247.     }
  1248.   }
  1249.   else if (hdac->State == HAL_DAC_STATE_RESET)
  1250.   {
  1251.     switch (CallbackID)
  1252.     {
  1253.       case HAL_DAC_MSPINIT_CB_ID :
  1254.         hdac->MspInitCallback = HAL_DAC_MspInit;
  1255.         break;
  1256.       case HAL_DAC_MSPDEINIT_CB_ID :
  1257.         hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  1258.         break;
  1259.       default :
  1260.         /* Update the error code */
  1261.         hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1262.         /* update return status */
  1263.         status =  HAL_ERROR;
  1264.         break;
  1265.     }
  1266.   }
  1267.   else
  1268.   {
  1269.     /* Update the error code */
  1270.     hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
  1271.     /* update return status */
  1272.     status =  HAL_ERROR;
  1273.   }
  1274.  
  1275.   /* Release Lock */
  1276.   __HAL_UNLOCK(hdac);
  1277.   return status;
  1278. }
  1279. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1280.  
  1281. /**
  1282.   * @}
  1283.   */
  1284.  
  1285. /**
  1286.   * @}
  1287.   */
  1288.  
  1289. /** @addtogroup DAC_Private_Functions
  1290.   * @{
  1291.   */
  1292.  
  1293. /**
  1294.   * @brief  DMA conversion complete callback.
  1295.   * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  1296.   *                the configuration information for the specified DMA module.
  1297.   * @retval None
  1298.   */
  1299. void DAC_DMAConvCpltCh1(DMA_HandleTypeDef *hdma)
  1300. {
  1301.   DAC_HandleTypeDef *hdac = (DAC_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  1302.  
  1303. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1304.   hdac->ConvCpltCallbackCh1(hdac);
  1305. #else
  1306.   HAL_DAC_ConvCpltCallbackCh1(hdac);
  1307. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1308.  
  1309.   hdac->State = HAL_DAC_STATE_READY;
  1310. }
  1311.  
  1312. /**
  1313.   * @brief  DMA half transfer complete callback.
  1314.   * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  1315.   *                the configuration information for the specified DMA module.
  1316.   * @retval None
  1317.   */
  1318. void DAC_DMAHalfConvCpltCh1(DMA_HandleTypeDef *hdma)
  1319. {
  1320.   DAC_HandleTypeDef *hdac = (DAC_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  1321.   /* Conversion complete callback */
  1322. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1323.   hdac->ConvHalfCpltCallbackCh1(hdac);
  1324. #else
  1325.   HAL_DAC_ConvHalfCpltCallbackCh1(hdac);
  1326. #endif  /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1327. }
  1328.  
  1329. /**
  1330.   * @brief  DMA error callback
  1331.   * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
  1332.   *                the configuration information for the specified DMA module.
  1333.   * @retval None
  1334.   */
  1335. void DAC_DMAErrorCh1(DMA_HandleTypeDef *hdma)
  1336. {
  1337.   DAC_HandleTypeDef *hdac = (DAC_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;
  1338.  
  1339.   /* Set DAC error code to DMA error */
  1340.   hdac->ErrorCode |= HAL_DAC_ERROR_DMA;
  1341.  
  1342. #if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  1343.   hdac->ErrorCallbackCh1(hdac);
  1344. #else
  1345.   HAL_DAC_ErrorCallbackCh1(hdac);
  1346. #endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  1347.  
  1348.   hdac->State = HAL_DAC_STATE_READY;
  1349. }
  1350.  
  1351. /**
  1352.   * @}
  1353.   */
  1354.  
  1355. /**
  1356.   * @}
  1357.   */
  1358.  
  1359. #endif /* DAC */
  1360.  
  1361. #endif /* HAL_DAC_MODULE_ENABLED */
  1362.  
  1363. /**
  1364.   * @}
  1365.   */
  1366.  
  1367. /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  1368.