/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f1xx_hal.h"

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DAC_Init(void);

/* Private variables ---------------------------------------------------------*/
DAC_HandleTypeDef hdac;

/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
uint8_t dacvalue=0;
/* USER CODE END PV */

/** Configure pins as 
        * Analog 
        * Input 
        * Output
        * EVENT_OUT
        * EXTI
*/
static void MX_GPIO_Init(void)
{

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();

}

/* DAC init function */
static void MX_DAC_Init(void)
{

  DAC_ChannelConfTypeDef sConfig;

    /**DAC Initialization 
    */
  hdac.Instance = DAC;
  if (HAL_DAC_Init(&hdac) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

    /**DAC channel OUT1 config 
    */
  sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
  sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
  if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_1) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

    /**DAC channel OUT2 config 
    */
  if (HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL_2) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

}

int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration----------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DAC_Init();

  /* USER CODE BEGIN 2 */
	HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
  /* USER CODE END WHILE */

  /* USER CODE BEGIN 3 */
	HAL_DAC_SetValue(&hdac,DAC_CHANNEL_1,DAC_ALIGN_8B_R,dacvalue);
	dacvalue+=20;
	if (dacvalue>255) dacvalue=0;
	HAL_Delay(200);	
  }
  /* USER CODE END 3 */