main.c

#include <stm32f303x8.h>
#include "main.h"

  #define VDDA_APPLI                       ((uint32_t)3300)
  #define DIGITAL_SCALE_12BITS             (__LL_DAC_DIGITAL_SCALE(LL_DAC_RESOLUTION_12B))
  #define WAVEFORM_AMPLITUDE          (VDDA_APPLI)
  #define WAVEFORM_FREQUENCY          ((uint32_t)1000)
  #define WAVEFORM_SAMPLES_SIZE       (sizeof (WaveformSine_12bits_32samples) / sizeof (uint16_t))
  #define WAVEFORM_TIMER_FREQUENCY                (WAVEFORM_FREQUENCY * WAVEFORM_SAMPLES_SIZE)
  #define WAVEFORM_TIMER_FREQUENCY_RANGE_MIN      ((uint32_t)    1)
  #define WAVEFORM_TIMER_PRESCALER_MAX_VALUE      ((uint32_t)0xFFFF-1)


#define __WAVEFORM_AMPLITUDE_SCALING(__DATA_12BITS__)                                     \
  (__DATA_12BITS__                                                                        \
   * __LL_DAC_CALC_VOLTAGE_TO_DATA(VDDA_APPLI, WAVEFORM_AMPLITUDE, LL_DAC_RESOLUTION_12B) \
   / __LL_DAC_DIGITAL_SCALE(LL_DAC_RESOLUTION_12B)                                        \
  )

uint16_t WaveformSine_12bits_32samples[] =
  {
    __WAVEFORM_AMPLITUDE_SCALING(2048),
    __WAVEFORM_AMPLITUDE_SCALING(2447),
    __WAVEFORM_AMPLITUDE_SCALING(2831),
    __WAVEFORM_AMPLITUDE_SCALING(3185),
    __WAVEFORM_AMPLITUDE_SCALING(3495),
    __WAVEFORM_AMPLITUDE_SCALING(3750),
    __WAVEFORM_AMPLITUDE_SCALING(3939),
    __WAVEFORM_AMPLITUDE_SCALING(4056),
    __WAVEFORM_AMPLITUDE_SCALING(4095),
    __WAVEFORM_AMPLITUDE_SCALING(4056),
    __WAVEFORM_AMPLITUDE_SCALING(3939),
    __WAVEFORM_AMPLITUDE_SCALING(3750),
    __WAVEFORM_AMPLITUDE_SCALING(3495),
    __WAVEFORM_AMPLITUDE_SCALING(3185),
    __WAVEFORM_AMPLITUDE_SCALING(2831),
    __WAVEFORM_AMPLITUDE_SCALING(2447),
    __WAVEFORM_AMPLITUDE_SCALING(2048),
    __WAVEFORM_AMPLITUDE_SCALING(1649),
    __WAVEFORM_AMPLITUDE_SCALING(1265),
    __WAVEFORM_AMPLITUDE_SCALING(911),
    __WAVEFORM_AMPLITUDE_SCALING(601),
    __WAVEFORM_AMPLITUDE_SCALING(346),
    __WAVEFORM_AMPLITUDE_SCALING(157),
    __WAVEFORM_AMPLITUDE_SCALING(40),
    __WAVEFORM_AMPLITUDE_SCALING(0),
    __WAVEFORM_AMPLITUDE_SCALING(40),
    __WAVEFORM_AMPLITUDE_SCALING(157),
    __WAVEFORM_AMPLITUDE_SCALING(346),
    __WAVEFORM_AMPLITUDE_SCALING(601),
    __WAVEFORM_AMPLITUDE_SCALING(911),
    __WAVEFORM_AMPLITUDE_SCALING(1265),
    __WAVEFORM_AMPLITUDE_SCALING(1649)
  };

void     SystemClock_Config(void);
void     Configure_DMA(void);
void     Configure_TIM_TimeBase_DAC_trigger(void);
void     Configure_DAC(void);
void     Activate_DAC(void);
void     LED_Init(void);
void     LED_On(void);
void     LED_Off(void);

static uint32_t tim_led_on = 0;

int main(void)
{
  /* Configure the system clock to 64 MHz */
  SystemClock_Config();

  /* Initialize LED2 */
  LED_Init();
  
  /* Turn-off LED2 */
  LED_Off();

  /* Configure DMA for data transfer from DAC */
  Configure_DMA();
  
  /* Configure timer as a time base used to trig DAC conversion start */
  Configure_TIM_TimeBase_DAC_trigger();
  
  /* Configure DAC channel */
  Configure_DAC();
  
  /* Activate DAC channel */
  Activate_DAC();
  
  /* Turn-on LED2 */
  LED_On();
  
  /* Infinite loop */
  while (1)
  {
    LL_mDelay(250);
  }
}

void Configure_DMA(void)
{
  /*## Configuration of NVIC #################################################*/ 
  /* Configure NVIC to enable DMA interruptions */
  NVIC_SetPriority(DMA1_Channel3_IRQn, 1); /* DMA IRQ lower priority than DAC IRQ */
  NVIC_EnableIRQ(DMA1_Channel3_IRQn);
  
  /*## Configuration of DMA ##################################################*/
  
  /* Enable the peripheral clock of DMA */
  LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA1);
  
  /* Specificity for this device: Remap DMA for the selected DAC channel */
  LL_SYSCFG_SetRemapDMA_DAC(LL_SYSCFG_DAC1_CH1_RMP_DMA1_CH3);

  /* Configure the DMA transfer */
  /*  - DMA transfer in circular mode to have an unlimited DAC signal         */
  /*    generation.                                                           */
  /*  - DMA transfer to DAC without address increment.                        */
  /*  - DMA transfer from memory with address increment.                      */
  /*  - DMA transfer to DAC by half-word to match with DAC resolution 12 bits */
  /*  - DMA transfer from memory by half-word to match with DAC data          */
  /*    buffer variable type: half-word.                                      */
  LL_DMA_ConfigTransfer(DMA1,
                        LL_DMA_CHANNEL_3,
                        LL_DMA_DIRECTION_MEMORY_TO_PERIPH |
                        LL_DMA_MODE_CIRCULAR              |
                        LL_DMA_PERIPH_NOINCREMENT         |
                        LL_DMA_MEMORY_INCREMENT           |
                        LL_DMA_PDATAALIGN_HALFWORD        |
                        LL_DMA_MDATAALIGN_HALFWORD        |
                        LL_DMA_PRIORITY_HIGH);


  /* Set DMA transfer addresses of source and destination */
  LL_DMA_ConfigAddresses(DMA1,
                         LL_DMA_CHANNEL_3,
                         (uint32_t)&WaveformSine_12bits_32samples,
                         LL_DAC_DMA_GetRegAddr(DAC1, LL_DAC_CHANNEL_1, LL_DAC_DMA_REG_DATA_12BITS_RIGHT_ALIGNED),
                         LL_DMA_DIRECTION_MEMORY_TO_PERIPH);
  
  /* Set DMA transfer size */
  LL_DMA_SetDataLength(DMA1,
                       LL_DMA_CHANNEL_3,
                       WAVEFORM_SAMPLES_SIZE);
  
  /* Enable DMA transfer interruption: transfer error */
  LL_DMA_EnableIT_TE(DMA1,
                     LL_DMA_CHANNEL_3);

  /* Note: In this example, the only DMA interruption activated is            */
  /*       tranfer error.                                                     */
  /*       If needed, DMA interruptions of half of transfer                   */
  /*       and transfer complete can be activated.                            */
  /*       Refer to DMA examples.                                             */
  
  /*## Activation of DMA #####################################################*/
  /* Enable the DMA transfer */
  LL_DMA_EnableChannel(DMA1,
                       LL_DMA_CHANNEL_3);

}


/**
  * @brief  Configure timer as a time base (timer instance: TIM6) 
  *         used to trig DAC conversion.
  * @note   In this DC example, timer instance must be on APB1 (clocked by PCLK1)
  *         to be compliant with frequency calculation used in this function.
  * @param  None
  * @retval None
  */
void Configure_TIM_TimeBase_DAC_trigger(void)
{
  uint32_t timer_clock_frequency = 0;             /* Timer clock frequency */
  uint32_t timer_prescaler = 0;                   /* Time base prescaler to have timebase aligned on minimum frequency possible */
  uint32_t timer_reload = 0;                      /* Timer reload value in function of timer prescaler to achieve time base period */

  /*## Configuration of NVIC #################################################*/
  /* Note: In this example, timer interruptions are not activated.            */
  /*       If needed, timer interruption at each time base period is          */
  /*       possible.                                                          */
  /*       Refer to timer examples.                                           */

  /*## Configuration of timer ################################################*/

  /* Configuration of timer as time base:                                     */
  /* Caution: Computation of frequency is done for a timer instance on APB1   */
  /*          (clocked by PCLK1)                                              */
  /* Timer frequency is configured from the following constants:              */
  /* - WAVEFORM_TIMER_FREQUENCY: timer frequency (unit: Hz).                  */
  /* - WAVEFORM_TIMER_FREQUENCY_RANGE_MIN: timer minimum frequency possible   */
  /*   (unit: Hz).                                                            */
  /* Note: Refer to comments at these literals definition for more details.   */

  /* Retrieve timer clock source frequency */
  /* If APB1 prescaler is different of 1, timers have a factor x2 on their    */
  /* clock source.                                                            */
  if (LL_RCC_GetAPB1Prescaler() == LL_RCC_APB1_DIV_1)
  {
    timer_clock_frequency = __LL_RCC_CALC_PCLK1_FREQ(SystemCoreClock, LL_RCC_GetAPB1Prescaler());
  }
  else
  {
    timer_clock_frequency = (__LL_RCC_CALC_PCLK1_FREQ(SystemCoreClock, LL_RCC_GetAPB1Prescaler()) * 2);
  }

  /* Timer prescaler calculation */
  /* (computation for timer 16 bits, additional + 1 to round the prescaler up) */
  timer_prescaler = ((timer_clock_frequency / (WAVEFORM_TIMER_PRESCALER_MAX_VALUE * WAVEFORM_TIMER_FREQUENCY_RANGE_MIN)) +1);
  /* Timer reload calculation */
  timer_reload = (timer_clock_frequency / (timer_prescaler * WAVEFORM_TIMER_FREQUENCY));

  /* Enable the timer peripheral clock */
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM6);

  /* Set timer pre-scaler value */
  LL_TIM_SetPrescaler(TIM6, (timer_prescaler - 1));

  /* Set timer auto-reload value */
  LL_TIM_SetAutoReload(TIM6, (timer_reload - 1));

  /* Set counter mode */
  LL_TIM_SetCounterMode(TIM6, LL_TIM_COUNTERMODE_UP);


  /* Note: In this example, timer interruptions are not activated.            */
  /*       If needed, timer interruption at each time base period is          */
  /*       possible.                                                          */
  /*       Refer to timer examples.                                           */

  /* Set timer the trigger output (TRGO) */
  LL_TIM_SetTriggerOutput(TIM6, LL_TIM_TRGO_UPDATE);

  /*## Activation of timer ###################################################*/
  /* Enable counter */
  TIM6->DIER |= 0x1;
  LL_TIM_EnableCounter(TIM6);
}

void Configure_DAC(void)
{
  /*## Configuration of GPIO used by DAC channels ############################*/
  
  /* Enable GPIO Clock */
  LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOA); 
  
  /* Configure GPIO in analog mode to be used as DAC output */
  LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_4, LL_GPIO_MODE_ANALOG);
  
  /*## Configuration of NVIC #################################################*/
  /* Configure NVIC to enable DAC1 interruptions */
  NVIC_SetPriority(TIM6_DAC1_IRQn, 0);
  NVIC_EnableIRQ(TIM6_DAC1_IRQn);
  
  /*## Configuration of DAC ##################################################*/
  
  /* Enable DAC clock */
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_DAC1);
  
  /* Select trigger source */
  LL_DAC_SetTriggerSource(DAC1, LL_DAC_CHANNEL_1, LL_DAC_TRIG_EXT_TIM6_TRGO);
  
  /* Set the output for the selected DAC channel */
  //LL_DAC_SetOutputBuffer(DAC1, LL_DAC_CHANNEL_1, LL_DAC_OUTPUT_BUFFER_ENABLE);
  
  /* Enable DAC channel DMA request */
  LL_DAC_EnableDMAReq(DAC1, LL_DAC_CHANNEL_1);
  
  /* Enable interruption DAC channel1 underrun */
  LL_DAC_EnableIT_DMAUDR1(DAC1);
}

void Activate_DAC(void)
{
  __IO uint32_t wait_loop_index = 0;
  
  /* Enable DAC channel */
  LL_DAC_Enable(DAC1, LL_DAC_CHANNEL_1);
  
  /* Delay for DAC channel voltage settling time from DAC channel startup.    */
  /* Compute number of CPU cycles to wait for, from delay in us.              */
  /* Note: Variable divided by 2 to compensate partially                      */
  /*       CPU processing cycles (depends on compilation optimization).       */
  /* Note: If system core clock frequency is below 200kHz, wait time          */
  /*       is only a few CPU processing cycles.                               */
  wait_loop_index = ((LL_DAC_DELAY_STARTUP_VOLTAGE_SETTLING_US * (SystemCoreClock / (100000 * 2))) / 10);
  while(wait_loop_index != 0)
  {
    wait_loop_index--;
  }
  
  /* Enable DAC channel trigger */
  /* Note: DAC channel conversion can start from trigger enable:              */
  /*       - if DAC channel trigger source is set to SW:                      */
  /*         DAC channel conversion will start after trig order               */
  /*         using function "LL_DAC_TrigSWConversion()".                      */
  /*       - if DAC channel trigger source is set to external trigger         */
  /*         (timer, ...):                                                    */
  /*         DAC channel conversion can start immediately                     */
  /*         (after next trig order from external trigger)                    */
  LL_DAC_EnableTrigger(DAC1, LL_DAC_CHANNEL_1);
}

void LED_Init(void)
{
  /* Enable the LED2 Clock */
  LED2_GPIO_CLK_ENABLE();

  /* Configure IO in output push-pull mode to drive external LED2 */
  LL_GPIO_SetPinMode(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_MODE_OUTPUT);
  /* Reset value is LL_GPIO_OUTPUT_PUSHPULL */
  //LL_GPIO_SetPinOutputType(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_OUTPUT_PUSHPULL);
  /* Reset value is LL_GPIO_SPEED_FREQ_LOW */
  //LL_GPIO_SetPinSpeed(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_SPEED_FREQ_LOW);
  /* Reset value is LL_GPIO_PULL_NO */
  //LL_GPIO_SetPinPull(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_PULL_NO);

  LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOA);
  LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOB);

  LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_12, LL_GPIO_MODE_OUTPUT);
  LL_GPIO_SetPinOutputType(GPIOA, LL_GPIO_PIN_12, LL_GPIO_OUTPUT_PUSHPULL);
  LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_12, LL_GPIO_SPEED_FREQ_HIGH);
  LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_12, LL_GPIO_PULL_NO);

  LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_0, LL_GPIO_MODE_OUTPUT);
  LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_0, LL_GPIO_OUTPUT_PUSHPULL);
  LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_0, LL_GPIO_SPEED_FREQ_HIGH);
  LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_0, LL_GPIO_PULL_NO);
}

void LED_On(void)
{
  /* Turn LED2 on */
  LL_GPIO_SetOutputPin(LED2_GPIO_PORT, LED2_PIN);
}

void LED_Off(void)
{
  /* Turn LED2 off */
  LL_GPIO_ResetOutputPin(LED2_GPIO_PORT, LED2_PIN);
}

void LED_Blinking(uint32_t Period)
{
  /* Turn LED2 on */
  LL_GPIO_SetOutputPin(LED2_GPIO_PORT, LED2_PIN);
  
  /* Toggle IO in an infinite loop */
  while (1)
  {
    LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);  
    LL_mDelay(Period);
  }
}

void SystemClock_Config(void)
{
  /* Set FLASH latency */ 
  LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);

  /* Enable HSI if not already activated*/
  if (LL_RCC_HSI_IsReady() == 0)
  {
    /* Enable HSI and wait for activation*/
    LL_RCC_HSI_Enable(); 
    while(LL_RCC_HSI_IsReady() != 1)
    {
    };
  }

  /* Main PLL configuration and activation */
  LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSI_DIV_2, LL_RCC_PLL_MUL_16);
  
  LL_RCC_PLL_Enable();
  while(LL_RCC_PLL_IsReady() != 1) 
  {
  };
  
  /* Sysclk activation on the main PLL */
  LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
  LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
  while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
  {
  };
  
  /* Set APB1 & APB2 prescaler*/
  LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
  LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
  
  /* Set systick to 1ms in using frequency set to 64MHz */
  /* This frequency can be calculated through LL RCC macro */
  /* ex: __LL_RCC_CALC_PLLCLK_FREQ ((HSI_VALUE / 2), LL_RCC_PLL_MUL_16) */
  LL_Init1msTick(64000000);
  
  /* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
  LL_SetSystemCoreClock(64000000);
}
/******************************************************************************/
/*   USER IRQ HANDLER TREATMENT                                               */
/******************************************************************************/

/**
  * @brief  DMA transfer error callback
  * @note   This function is executed when the transfer error interrupt
  *         is generated during DMA transfer
  * @retval None
  */
void DacDmaTransferError_Callback()
{
  /* Error detected during DMA transfer */
  LED_Blinking(LED_BLINK_ERROR * 2);
}

/**
  * @brief  DAC underrun interruption callback
  * @note   This function is executed when DAC channel underrun error occurs.
  * @retval None
  */
void DacUnderrunError_Callback(void)
{
  /* Note: Disable DAC interruption that caused this error before entering in */
  /*       infinite loop below.                                               */
  
  /* Disable interruption DAC channel1 underrun */
  LL_DAC_DisableIT_DMAUDR1(DAC1);
  
  /* Error from ADC */
  LED_Blinking(LED_BLINK_ERROR / 4);
}

void TIM6_Update_Handler(void) {
  if (tim_led_on) {
    LL_GPIO_SetOutputPin(GPIOA, LL_GPIO_PIN_12);
  }
  else {
    LL_GPIO_ResetOutputPin(GPIOA, LL_GPIO_PIN_12);
  }

  tim_led_on = !tim_led_on;
}

main.h

/**
  ******************************************************************************
  * @file    Examples_LL/DAC/DAC_GenerateWaveform_TriggerHW/Inc/main.h
  * @author  MCD Application Team
  * @brief   Header for main.c module
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __MAIN_H
#define __MAIN_H

/* Includes ------------------------------------------------------------------*/
#include "stm32f3xx_ll_bus.h"
#include "stm32f3xx_ll_rcc.h"
#include "stm32f3xx_ll_system.h"
#include "stm32f3xx_ll_utils.h"
#include "stm32f3xx_ll_gpio.h"
#include "stm32f3xx_ll_exti.h"
#include "stm32f3xx_ll_dma.h"
#include "stm32f3xx_ll_tim.h"
#include "stm32f3xx_ll_dac.h"

#if defined(USE_FULL_ASSERT)
#include "stm32_assert.h"
#endif /* USE_FULL_ASSERT */

/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/

/**
  * @brief LED2 
  */
#define LED2_PIN                           LL_GPIO_PIN_3
#define LED2_GPIO_PORT                     GPIOB
#define LED2_GPIO_CLK_ENABLE()             LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOB)

/**
  * @brief Toggle periods for various blinking modes
  */
#define LED_BLINK_FAST  200
#define LED_BLINK_SLOW  500
#define LED_BLINK_ERROR 1000


/* Exported macro ------------------------------------------------------------*/

/* Exported functions ------------------------------------------------------- */
/* IRQ Handler treatment */
void DacDmaTransferError_Callback(void);
void DacUnderrunError_Callback(void);
void TIM6_Update_Handler(void);

#endif /* __MAIN_H */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

stm32f3xx_it.c

/** 
  ******************************************************************************
  * @file    Examples_LL/DAC/DAC_GenerateWaveform_TriggerHW/Src/stm32f3xx_it.c
  * @author  MCD Application Team
  * @brief   Main Interrupt Service Routines.
  *          This file provides template for all exceptions handler and
  *          peripherals interrupt service routine.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32f3xx_it.h"

/** @addtogroup STM32F3xx_LL_Examples
  * @{
  */

/** @addtogroup DAC_GenerateWaveform_TriggerHW
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/

/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/******************************************************************************/
/*            Cortex-M4 Processor Exceptions Handlers                         */
/******************************************************************************/

/**
  * @brief  This function handles NMI exception.
  * @param  None
  * @retval None
  */
void NMI_Handler(void)
{
}

/**
  * @brief  This function handles Hard Fault exception.
  * @param  None
  * @retval None
  */
void HardFault_Handler(void)
{
  /* Go to infinite loop when Hard Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Memory Manage exception.
  * @param  None
  * @retval None
  */
void MemManage_Handler(void)
{
  /* Go to infinite loop when Memory Manage exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Bus Fault exception.
  * @param  None
  * @retval None
  */
void BusFault_Handler(void)
{
  /* Go to infinite loop when Bus Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles Usage Fault exception.
  * @param  None
  * @retval None
  */
void UsageFault_Handler(void)
{
  /* Go to infinite loop when Usage Fault exception occurs */
  while (1)
  {
  }
}

/**
  * @brief  This function handles SVCall exception.
  * @param  None
  * @retval None
  */
void SVC_Handler(void)
{
}

/**
  * @brief  This function handles Debug Monitor exception.
  * @param  None
  * @retval None
  */
void DebugMon_Handler(void)
{
}

/**
  * @brief  This function handles PendSVC exception.
  * @param  None
  * @retval None
  */
void PendSV_Handler(void)
{
}

/**
  * @brief  This function handles SysTick Handler.
  * @param  None
  * @retval None
  */
void SysTick_Handler(void)
{
}

/******************************************************************************/
/*                 STM32F3xx Peripherals Interrupt Handlers                   */
/*  Add here the Interrupt Handler for the used peripheral(s) (PPP), for the  */
/*  available peripheral interrupt handler's name please refer to the startup */
/*  file (startup_stm32f3xx.s).                                               */
/******************************************************************************/


/**
  * @brief  This function handles DAC1 interrupt.
  * @param  None
  * @retval None
  */
void TIM6_DAC1_IRQHandler(void)
{
  if (LL_TIM_IsActiveFlag_UPDATE(TIM6)) {
    LL_TIM_ClearFlag_UPDATE(TIM6);
    TIM6_Update_Handler();
    return;
  }
  /* Check whether DAC channel1 underrun caused the DAC interruption */
  if(LL_DAC_IsActiveFlag_DMAUDR1(DAC1) != 0)
  {
    /* Clear flag DAC channel1 underrun */
    LL_DAC_ClearFlag_DMAUDR1(DAC1);
    
    /* Call interruption treatment function */
    DacUnderrunError_Callback();
  }
}

/**
  * @brief  This function handles DMA1 interrupt request.
  * @param  None
  * @retval None
  */
void DMA1_Channel3_IRQHandler(void)
{
  /* Check whether DMA transfer error caused the DMA interruption */
  if(LL_DMA_IsActiveFlag_TE3(DMA1) == 1)
  {
    /* Clear flag DMA transfer error */
    LL_DMA_ClearFlag_TE3(DMA1);
    
    /* Call interruption treatment function */
    DacDmaTransferError_Callback();
    return;
  }
}

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

stm32f3xx_it.h

/**
  ******************************************************************************
  * @file    Examples_LL/DAC/DAC_GenerateWaveform_TriggerHW/Inc/stm32f3xx_it.h
  * @author  MCD Application Team
  * @brief   This file contains the headers of the interrupt handlers.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM32F3xx_IT_H
#define __STM32F3xx_IT_H

#ifdef __cplusplus
extern "C" {
#endif

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */

void NMI_Handler(void);
void HardFault_Handler(void);
void MemManage_Handler(void);
void BusFault_Handler(void);
void UsageFault_Handler(void);
void SVC_Handler(void);
void DebugMon_Handler(void);
void PendSV_Handler(void);
void SysTick_Handler(void);


void DMA1_Channel3_IRQHandler(void);
void TIM6_DAC1_IRQHandler(void);

#ifdef __cplusplus
}
#endif

#endif /* __STM32F3xx_IT_H */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/