#define amlitude_step  (uint32_t)(4095/30)
static uint32_t parameter = 0;

static void DAC_Ch1_TriangleConfig(void)
{

  /*##-1- Initialize the DAC peripheral ######################################*/
  if(HAL_DAC_Init(&DacHandle) != HAL_OK)
  {
    /* Initialization Error */
    Error_Handler();
  }
 
  /*##-2- DAC channel2 Configuration #########################################*/
  sConfig.DAC_Trigger = DAC_TRIGGER_T6_TRGO;
  sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE; 

  if(HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DACx_CHANNEL1) != HAL_OK)
  {
    /* Channel configuration Error */
    Error_Handler();
  }
 
  /*##-3- DAC channel2 Triangle Wave generation configuration ################*/
   
   if(ubKeyPressed != RESET)
   {
      parameter = amlitude_step;
      
   //parameter = parameter+amlitude_step;
      parameter +=  amlitude_step;
      
   }
   
  if(HAL_DACEx_TriangleWaveGenerate(&DacHandle, DACx_CHANNEL1, parameter) != HAL_OK)
/*DAC_TRIANGLEAMPLITUDE_4095 */
  {
      
    /* Triangle wave generation Error */
    Error_Handler();
  }
 
  /*##-4- Enable DAC Channel1 ################################################*/
  if(HAL_DAC_Start(&DacHandle, DACx_CHANNEL1) != HAL_OK)
  {
    /* Start Error */
    Error_Handler();
  }

  /*##-5- Set DAC channel1 DHR12RD register ################################################*/
  if(HAL_DAC_SetValue(&DacHandle, DACx_CHANNEL1, DAC_ALIGN_12B_R, 0x100) != HAL_OK)
  {
    /* Setting value Error */
    Error_Handler();
  }
}